Tüm alıştırma soruları

8270 soru

Soru 5221Soru →

A 24-year-old nulliparous woman is evaluated in the clinic for secondary amenorrhea. Her last menstrual period occurred 88 months ago. Previously, she had predictable 2828-day cycles. Over the past 66 months, she has become increasingly distressed by new-onset severe cystic acne, coarse hair growth on her chest and back, and a noticeable deepening of her voice. She has no significant past medical history and takes no medications. In the clinic, a urine human chorionic gonadotropin test is negative. Vital signs are normal with a body mass index of 2222 kg/m2kg/m^2. Examination reveals temporal hair thinning, marked hirsutism, and clitoromegaly. Pelvic examination is otherwise unremarkable. Laboratory studies show:

Laboratory TestResultReference Range
Thyroid-stimulating hormone1.81.8 μU/mL\mu U/mL0.5−5.00.5-5.0 μU/mL\mu U/mL
Prolactin1212 ng/mLng/mL<25<25 ng/mLng/mL
Total testosterone6868 ng/dLng/dL15−7015-70 ng/dLng/dL
Dehydroepiandrosterone sulfate (DHEA-S)890890 μg/dL\mu g/dL35−43035-430 μg/dL\mu g/dL

Which of the following is the most appropriate next step in the diagnostic evaluation of this patient?

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Cevap: Computed tomography of the abdomen

Cevap

Computed tomography of the abdomen
The correct answer is computed tomography of the abdomen. This patient presents with secondary amenorrhea and rapid-onset virilization (clitoromegaly, temporal thinning, voice changes), which is highly suspicious for an androgen-secreting tumor. The laboratory evaluation is crucial for localizing the tumor. Dehydroepiandrosterone sulfate (DHEA-S) is specifically synthesized by the adrenal glands, whereas testosterone is secreted by the ovaries (and peripherally converted). Her isolated, marked elevation in DHEA-S (>700 µg/dL) strongly suggests an adrenal source, such as an adrenocortical carcinoma or adrenal adenoma. Therefore, abdominal imaging (CT or MRI) is the most appropriate next step.

Adım Adım Çözüm

1
Rule out pregnancy as a cause of secondary amenorrhea.
The urine beta-hCG is negative, allowing for further endocrine and structural evaluation.
Pregnancy is the most common cause of secondary amenorrhea and must be excluded first in all premenopausal women.
2
Analyze the physical examination findings to categorize the severity of hyperandrogenism.
The patient exhibits signs of true virilization, including clitoromegaly, deepening voice, and temporal balding, rather than just mild hirsutism or acne.
Rapid onset of virilizing signs in a female suggests an autonomous, malignant, or rapidly growing androgen-secreting tumor rather than a benign disorder like polycystic ovary syndrome.
3
Interpret the laboratory results to localize the source of the excess androgens.
Total testosterone is within normal limits, while DHEA-S is markedly elevated (>700 µg/dL).
Dehydroepiandrosterone sulfate (DHEA-S) is produced almost exclusively by the adrenal glands. Conversely, significant elevations in total testosterone (>150 ng/dL) typically originate from the ovaries.
4
Select the appropriate imaging modality based on the localized source.
Computed tomography (CT) of the abdomen is selected to visualize the adrenal glands.
Because the laboratory profile specifically points to an adrenal source of androgen excess (high DHEA-S), abdominal imaging is required to identify a suspected adrenal adenoma or adrenocortical carcinoma.

Anahtar Kavram

In premenopausal women presenting with rapid-onset virilization and secondary amenorrhea, markedly elevated DHEA-S levels indicate an adrenal androgen-secreting tumor, warranting an abdominal CT scan. Elevated testosterone levels point to an ovarian source, warranting a pelvic ultrasound.
Soru 5222Soru →

During a routine third-trimester visit, a patient at 33 weeks gestation reports feeling increasingly winded after walking up the stairs at her home. She also notes that her shoes feel tight by the evening. The pregnancy has been uncomplicated thus far. Her current vital signs include a blood pressure of 112/68 mm Hg, a heart rate of 96/min, and a respiratory rate of 18/min. On physical examination, the physician notes a grade 2/6 systolic ejection murmur along the left sternal edge, accompanied by an early diastolic extra heart sound (S3). There is trace bilateral pitting edema of the ankles. Pulmonary auscultation reveals clear breath sounds in all fields, and the jugular venous pulse is not elevated. A rhythm strip demonstrates normal sinus rhythm with left axis deviation. What is the most appropriate action at this time?

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Cevap: Reassurance and continued routine prenatal care

Cevap

Reassurance and continued routine prenatal care
The correct action is reassurance. Normal maternal physiology undergoes profound changes to accommodate the developing fetus. The cardiovascular system exhibits increased cardiac output and plasma volume, frequently resulting in a hyperdynamic state. This commonly manifests as an S3 gallop and a soft (grade 1/6 or 2/6) systolic ejection murmur. The expanding uterus displaces the diaphragm upward, causing a left axis deviation on an electrocardiogram. Mechanical compression of the inferior vena cava by the uterus leads to decreased venous return from the lower extremities, resulting in benign, dependent pedal edema. Finally, progesterone drives an increase in minute ventilation, often perceived by the patient as exertional dyspnea. Because this patient has no signs of decompensation (clear lungs, normal jugular venous pressure, normal blood pressure), these findings are entirely physiologic and require only routine follow-up.

Adım Adım Çözüm

1
Analyze the patient's vital signs and respiratory symptoms.
The patient has dyspnea on exertion, but vital signs show normal respiratory rate, normal blood pressure, and mild tachycardia typical for the third trimester.
To distinguish between physiologic dyspnea of pregnancy (progesterone-mediated) and a pathologic pulmonary process.
2
Evaluate the cardiovascular exam findings.
The grade 2/6 systolic ejection murmur, S3 gallop, left axis deviation, and dependent edema are identified in a patient with clear lungs and normal JVP.
To determine if the cardiac signs represent structural heart disease/failure or normal hyperdynamic circulation of pregnancy.
3
Determine the appropriate management.
All findings represent normal maternal adaptations to pregnancy; therefore, no diagnostic testing or pharmacologic intervention is required.
Intervening on physiologic changes can lead to unnecessary testing or iatrogenic harm.

Anahtar Kavram

Normal maternal cardiovascular adaptations to pregnancy include increased plasma volume, increased cardiac output, a benign systolic ejection murmur, an S3 gallop, dependent edema, and dyspnea on exertion.
Soru 5223Soru →

A 33-year-old boy is brought to the pediatrician's office by his father, who noticed a firm, painless swelling on the right side of the child's abdomen while dressing him. The child has been eating well, is as active as usual, and has had no fever, vomiting, or bone pain. Vital signs are within normal limits for age, except for a blood pressure of 120/78120/78 mmHg (which is >95>95 th percentile for his age). On physical examination, a smooth, firm, non-tender mass is palpated in the right upper and lower quadrants; it does not cross the midline. The remainder of the examination is unremarkable. Urinalysis reveals 1010-1515 red blood cells per high-power field. Which of the following is the most appropriate next step in the evaluation of this patient?

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Cevap: Abdominal ultrasonography

Cevap

Abdominal ultrasonography
The correct answer is abdominal ultrasonography. This patient's presentation of a unilateral, painless, firm abdominal mass that does not cross the midline, accompanied by hypertension and microscopic hematuria, is highly suspicious for a Wilms tumor (nephroblastoma). The most appropriate initial step in the evaluation of a pediatric abdominal mass is an ultrasound. It is a rapid, non-invasive imaging modality that avoids ionizing radiation. Ultrasonography can confirm the presence of a mass, differentiate between cystic (e.g., hydronephrosis) and solid structures, and identify the organ of origin (e.g., intrinsic renal mass versus an extrinsic mass like neuroblastoma), which effectively guides the next steps in management and staging.

Adım Adım Çözüm

1
Identify the most likely diagnosis based on the clinical presentation.
The patient's age, presence of an asymptomatic unilateral abdominal mass, hypertension, and microscopic hematuria strongly suggest a Wilms tumor (nephroblastoma).
Wilms tumor is the most common pediatric renal malignancy and classically presents with an asymptomatic abdominal mass that does not cross the midline, often accompanied by secondary effects of renal involvement like renin-mediated hypertension and hematuria.
2
Determine the most appropriate initial diagnostic test.
Abdominal ultrasonography is the standard first step.
Ultrasound is a rapid, safe, radiation-free imaging modality that can immediately confirm the mass, distinguish between cystic and solid structures, and verify its origin within the kidney.

Anahtar Kavram

Wilms tumor presentation and initial diagnostic workup
Tahmini Süre:1m 0s
Soru 5224Soru →

While performing a routine evaluation on the antepartum unit, a physician responds to a patient who has suddenly become unresponsive. The patient, who was admitted earlier that day for induction of labor at 39 weeks gestation due to severe features of preeclampsia, is exhibiting generalized, rhythmic jerking of her extremities and a clenched jaw. Her last recorded blood pressure 15 minutes prior was 172/114 mm Hg. Arrange the following management steps in the most appropriate sequential order to stabilize and treat this acute obstetric emergency.

Öğeleri doğru sıraya koymak için sürükleyin

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Cevap

The correct sequence is: Turn the patient to the lateral decubitus position and ensure airway patency -> Initiate an intravenous bolus of magnesium sulfate -> Administer an intravenous antihypertensive agent -> Assess the fetal heart rate tracing and maternal cervical status -> Proceed with expedited delivery of the fetus.
Eclampsia is a life-threatening obstetric emergency requiring a strict, algorithmic approach. The absolute first priority is maternal stabilization, beginning with airway protection and lateral decubitus positioning to prevent aspiration and improve venous return. Once the airway is addressed, intravenous magnesium sulfate is the first-line medication to halt the seizure and prevent recurrence. Following seizure control, severe hypertension (blood pressure ≥ 160/110 mm Hg) must be managed with intravenous antihypertensives to prevent maternal stroke. Only after the mother is hemodynamically stable should the physician evaluate the fetal heart rate tracing, which frequently demonstrates a prolonged deceleration that resolves spontaneously with maternal resuscitation. Finally, once the mother is stable, expedited delivery of the fetus and placenta is performed as the definitive cure for the disease process.

Adım Adım Çözüm

1
Turn the patient to the lateral decubitus position and ensure airway patency.
Airway is protected and aortocaval compression is relieved.
Prevents aspiration and maximizes maternal oxygenation and venous return during the tonic-clonic phase.
2
Initiate an intravenous bolus of magnesium sulfate.
Seizure activity is terminated and prophylaxis against further seizures is established.
Magnesium sulfate is the definitive first-line neuroprotective therapy for eclampsia.
3
Administer an intravenous antihypertensive agent (e.g., labetalol or hydralazine).
Blood pressure is safely reduced below the severe range (systolic < 160 mm Hg, diastolic < 110 mm Hg).
Prevents catastrophic maternal complications such as stroke, myocardial infarction, or placental abruption.
4
Assess the fetal heart rate tracing and maternal cervical status.
Fetal well-being and readiness for delivery are evaluated.
Maternal hypoxia during a seizure often causes transient fetal bradycardia; assessing the tracing after maternal stabilization prevents unnecessary emergent surgical intervention.
5
Proceed with expedited delivery of the fetus.
The fetus and placenta are delivered.
Delivery removes the source of the pathology and is the ultimate definitive treatment for eclampsia.

Anahtar Kavram

The management of eclampsia prioritizes sequential maternal stabilization (airway protection, seizure control with magnesium sulfate, and blood pressure control) prior to assessing the fetus and proceeding with definitive delivery.
Tahmini Süre:2m 0s
Soru 5225Soru →

Match each of the following major obstetric emergencies during labor and the puerperium with its classic physical examination or clinical presentation.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

Uterine atony
Genital tract laceration
Retained placental fragments
Uterine inversion
Uterine rupture

Eşleşmeler

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Cevap

Uterine atony matches with a soft, boggy uterus; Genital tract laceration matches with a firm uterus and continuous trickle of blood; Retained placental fragments matches with missing cotyledons; Uterine inversion matches with a vaginal mass and unpalpable abdominal fundus; Uterine rupture matches with sudden pain and regression of fetal station.
Each obstetric emergency has a distinct and classic clinical presentation. Uterine atony is characterized by a soft, boggy uterus. Genital tract lacerations present with a firm uterus but continued bleeding. Retained placenta is identified by missing cotyledons on inspection. Uterine inversion presents with an unpalpable abdominal fundus and a vaginal mass. Uterine rupture is classically associated with sudden pain, cessation of contractions, and loss of fetal station.

Adım Adım Çözüm

1
Identify the clinical presentation of uterine atony.
A soft, boggy, enlarged uterus with profuse hemorrhage.
The failure of the myometrium to contract prevents spiral artery compression, which is the primary mechanism of postpartum hemostasis.
2
Identify the clinical presentation of a genital tract laceration.
A firm, well-contracted uterus with a steady trickle of bright red blood.
The bleeding originates from the birth canal rather than the placental bed, so the uterus maintains its normal firm tone.
3
Identify the clinical presentation of retained placental fragments.
A firm uterus with continued bleeding and missing cotyledons on placental inspection.
Adherent or retained tissue prevents complete focal contraction, and the visual defect in the delivered placenta is the hallmark diagnostic finding.
4
Identify the clinical presentation of uterine inversion.
A smooth vaginal mass with an unpalpable abdominal fundus.
The fundus collapses inside out into the birth canal, leaving a palpable void in the lower abdomen.
5
Identify the clinical presentation of uterine rupture.
Sudden tearing pain, cessation of contractions, and regression of fetal station.
A complete myometrial wall tear allows the fetus to exit into the peritoneal cavity, halting labor forces and fetal descent.

Anahtar Kavram

Clinical presentation and physical examination findings of severe intrapartum and postpartum obstetric emergencies.
Soru 5226Soru →

A 9-month-old boy is brought to the emergency department by his parents due to sudden-onset, intermittent episodes of severe crying. During these episodes, he draws his knees up to his chest and appears inconsolable. Between episodes, the parents note that he appears uncharacteristically lethargic. He has vomited twice since the morning, and a recent diaper change revealed dark red, mucus-like stool. On physical examination, temperature is 37.2°C (99.0°F), heart rate is 170/min, and blood pressure is 85/50 mm Hg. Capillary refill time is 4 seconds. Abdominal examination reveals a palpable, sausage-shaped mass in the right upper quadrant, with no rebound tenderness, guarding, or rigidity.

Arrange the following management steps in the most appropriate chronological order for this patient.

Öğeleri doğru sıraya koymak için sürükleyin

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Cevap

The correct chronological sequence is: 1) Establish intravenous access and administer an isotonic fluid bolus, 2) Perform an abdominal ultrasound to confirm the diagnosis, 3) Notify the pediatric surgery team to be on standby, 4) Attempt a fluoroscopy-guided pneumatic enema, 5) Proceed to surgical laparotomy if non-operative reduction fails.
This infant presents with classic signs of intussusception (colicky abdominal pain, lethargy, currant jelly stools, and a sausage-shaped mass) alongside objective signs of hypovolemic shock. According to pediatric advanced life support guidelines, establishing IV access and administering an isotonic fluid bolus is the paramount first step. Once the patient is hemodynamically stable, an abdominal ultrasound should be performed to confirm the diagnosis (typically showing a 'target' sign). Because the subsequent treatment—a pneumatic enema—carries a risk of bowel perforation, the pediatric surgery team must be notified to be on standby. After surgical notification, the pneumatic enema is performed to therapeutically reduce the intussusception. Finally, if this non-operative approach fails, or if a perforation occurs during the procedure, the necessary next step is to proceed to surgical laparotomy.

Adım Adım Çözüm

1
Assess hemodynamic status and prioritize resuscitation.
Patient is stabilized with intravenous isotonic fluids.
The patient exhibits signs of shock (lethargy, tachycardia, delayed capillary refill), which must be addressed prior to diagnostic workup to prevent cardiovascular collapse.
2
Obtain diagnostic imaging.
Abdominal ultrasound confirms the presence of a 'target sign'.
Ultrasound is the most sensitive and specific non-invasive modality to confirm intussusception without exposing the infant to ionizing radiation.
3
Coordinate multidisciplinary care.
Pediatric surgery is notified of the confirmed diagnosis.
Surgeons must be on standby during therapeutic enemas due to the risk of iatrogenic perforation or failure of reduction.
4
Attempt non-operative therapeutic reduction.
A fluoroscopy-guided pneumatic enema is performed.
Because the patient's abdomen lacks signs of peritonitis, air or contrast enema is the standard primary therapeutic approach.
5
Prepare for definitive surgical management.
Surgical laparotomy is planned as a backup procedure.
Operative manual reduction is strictly required if the non-operative enema is unsuccessful or complicated by bowel perforation.

Anahtar Kavram

The sequential management of intussusception involves initial hemodynamic stabilization, ultrasound confirmation, surgical notification, followed by non-operative enema reduction, with surgery reserved for failed reduction or acute complications.
Soru 5227Soru →

A 3030-year-old healthy nulligravid woman presents for a preconception evaluation. She asks detailed questions regarding early pregnancy development. To accurately explain the normal progression of fetal and placental development, arrange the following physiological milestones in the correct chronological order from earliest to latest based on estimated gestational age.

Öğeleri doğru sıraya koymak için sürükleyin

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Cevap

The correct chronological sequence of fetal and placental developmental milestones is: 1) Implantation of the blastocyst, 2) Initiation of embryonic cardiac contractions, 3) Transition of progesterone synthesis to the placenta, 4) Complete fusion of the amnion and chorion, and 5) Initial secretion of surfactant.
Gestational age is standardly calculated from the first day of the last menstrual period, meaning fertilization typically occurs at 2 weeks of gestation. Blastocyst implantation into the endometrium happens 6-7 days post-fertilization (approximately 3-4 weeks gestation). The cardiovascular system is the first to function, with cardiac contractions starting around 5.5-6 weeks. The luteal-placental shift, where the placenta becomes the primary source of progesterone, occurs between 7 and 10 weeks. The expanding amnion completely fuses with the chorion by 14-16 weeks. Finally, fetal type II pneumocytes begin the initial secretion of surfactant into the alveoli between 20 and 24 weeks.

Adım Adım Çözüm

1
Determine the gestational age of blastocyst implantation.
Implantation happens at 3 to 4 weeks of gestation.
Following fertilization at week 2, the zygote travels to the uterus and implants 6-7 days later.
2
Identify the gestational age for the onset of embryonic cardiac activity.
Cardiac contractions begin at 5.5 to 6 weeks of gestation.
The cardiovascular system is the first functional organ system to develop, with the heart tube beating by day 21-22 post-fertilization.
3
Establish the timing of the luteal-placental shift.
The shift occurs between 7 and 10 weeks of gestation.
The corpus luteum supports the pregnancy initially, but by 7-10 weeks, the placenta produces sufficient progesterone to maintain the pregnancy independently.
4
Determine when the amnion and chorion membranes fuse.
Fusion is complete by 14 to 16 weeks of gestation.
The amniotic cavity expands rapidly during the early second trimester to obliterate the chorionic cavity (extraembryonic coelom).
5
Identify the onset of fetal surfactant production.
Surfactant secretion begins at 20 to 24 weeks of gestation.
Type II pneumocytes mature and begin initial surfactant production during the canalicular stage of lung development, a key milestone for eventual extrauterine viability.

Anahtar Kavram

Normal gestational milestones follow a predictable timeline: implantation (~3-4 weeks), cardiac activity (~5.5-6 weeks), luteal-placental shift (~7-10 weeks), amnion-chorion fusion (~14-16 weeks), and initial surfactant production (~20-24 weeks).
Tahmini Süre:2m 0s
Soru 5228Soru →

A 3030-year-old woman, gravida 1, para 0, at 3838 weeks gestation is admitted to the labor and delivery unit for induction of labor due to preeclampsia with severe features. She is receiving continuous intravenous infusions of oxytocin and magnesium sulfate. Maintenance intravenous fluids are running concurrently at 125 mL/hr125\text{ mL/hr}. Approximately 1212 hours into her induction, she reports the sudden onset of severe shortness of breath, anxiety, and a cough productive of pink, frothy sputum.

Vital signs are:
- Temperature: 37.0∘C37.0^\circ\text{C} (98.6∘F98.6^\circ\text{F})
- Blood pressure: 152/100 mmHg152/100\text{ mmHg}
- Heart rate: 118/min118/\text{min}
- Respiratory rate: 28/min28/\text{min}
- Oxygen saturation: 86%86\% on room air

Physical examination reveals prominent jugular venous distension and diffuse, bilateral crackles on lung auscultation. Deep tendon reflexes are 2+2+ and symmetric bilaterally. Urine output has been 50 mL50\text{ mL} over the last 22 hours. The fetal heart rate tracing demonstrates a baseline of 145/min145/\text{min} with moderate variability and no decelerations. Supplemental oxygen is administered via a non-rebreather mask.

Which of the following is the most appropriate next step in management?

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Cevap: Administer intravenous furosemide

Cevap

The most appropriate next step is to administer intravenous furosemide to treat the acute pulmonary edema.
This patient has developed acute pulmonary edema, a life-threatening complication of severe preeclampsia. The pathophysiology involves increased systemic vascular resistance, increased capillary permeability, and decreased plasma oncotic pressure, which is often exacerbated by intravenous fluid administration during labor induction. Her clinical presentation (hypoxia, pink frothy sputum, jugular venous distension, bilateral crackles, and tachypnea) is classic for fluid overload and alveolar fluid accumulation. The most appropriate immediate next step, in addition to the supplemental oxygen she is already receiving, is the administration of an intravenous loop diuretic such as furosemide to reduce intravascular volume and relieve the pulmonary congestion.

Adım Adım Çözüm

1
Evaluate the patient's acute respiratory distress in the context of severe preeclampsia.
The presence of tachypnea, hypoxia, pink frothy sputum, jugular venous distension, and bilateral crackles indicates acute decompensated heart failure resulting in pulmonary edema.
Preeclampsia causes endothelial damage, increased capillary permeability, and increased systemic vascular resistance, making patients highly susceptible to pulmonary edema, particularly during fluid-heavy labor inductions.
2
Differentiate pulmonary edema from magnesium toxicity.
The patient has a respiratory rate of 28/min and 2+ deep tendon reflexes. Magnesium toxicity presents with respiratory depression (rate < 12/min) and absent reflexes.
Ruling out magnesium toxicity ensures that the correct antidote (calcium gluconate) is avoided and proper treatment is initiated.
3
Select the immediate therapeutic intervention.
Intravenous loop diuretics (furosemide) are indicated.
Furosemide provides rapid venodilation (decreasing preload) and diuresis (removing excess fluid), which directly addresses the life-threatening alveolar fluid accumulation.

Anahtar Kavram

Acute pulmonary edema is a severe complication of preeclampsia that presents with tachypnea, hypoxia, and crackles, requiring immediate management with supplemental oxygen and intravenous furosemide. It must be clinically distinguished from magnesium toxicity, which presents with respiratory depression and areflexia.
Soru 5229Soru →

A 16-year-old female presents to the gynecology clinic reporting that she has never had a menstrual period. She became sexually active six months ago and uses condoms inconsistently. She has no chronic medical conditions and takes no medications. Physical examination reveals normal external genitalia, Tanner stage 4 breast development, and Tanner stage 4 pubic hair. Her body mass index (BMI) is 22 kg/m². Arrange the following diagnostic steps in the most appropriate sequential order for evaluating this patient's primary amenorrhea.

Öğeleri doğru sıraya koymak için sürükleyin

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Cevap

The correct sequence is: 1) Perform a urine beta-hCG test, 2) Perform a pelvic ultrasound, 3) Measure serum FSH, TSH, and prolactin levels, 4) Perform an MRI of the brain.
The correct sequence strictly follows standard gynecological guidelines for evaluating primary amenorrhea. A beta-hCG test is universally the first step in reproductive-age females. Once pregnancy is excluded, the algorithm for primary amenorrhea with normal breast development dictates a pelvic ultrasound to check for the uterus. If the uterus is present, systemic endocrine causes are evaluated with FSH, TSH, and prolactin. Finally, if these labs point to a central defect, an MRI is indicated.

Adım Adım Çözüm

1
Rule out pregnancy
Order a urine beta-hCG test
Pregnancy must be excluded first in any sexually active female with amenorrhea, regardless of age or prior menstrual history.
2
Evaluate internal pelvic anatomy
Order a pelvic ultrasound
With normal breast development (indicating estrogen production), the next step is verifying the presence of a uterus and ruling out structural anomalies like Müllerian agenesis.
3
Assess endocrine function
Measure serum FSH, TSH, and prolactin
If the uterus is present and the outflow tract is normal, laboratory testing is required to identify hypothalamic, pituitary, or ovarian dysfunction.
4
Evaluate for central neurological lesions
Perform a brain MRI
Central imaging is reserved for patients whose laboratory results suggest a central cause, such as a prolactinoma or central hypogonadotropic hypogonadism.

Anahtar Kavram

The step-wise evaluation of primary amenorrhea in a patient with normal secondary sexual characteristics begins with a pregnancy test, followed by pelvic imaging to assess the uterus, and subsequent endocrine laboratory testing.
Tahmini Süre:1m 0s
Soru 5230Soru →

During a routine health maintenance visit, a 42-year-old G0P0 patient receives the results of a recent cervical cancer screening. She currently feels well and reports regular, 28-day menstrual cycles. Her medical history is notable for obesity (BMI 33 kg/m233 \text{ kg/m}^2) and diet-controlled type 2 diabetes mellitus. The cytology report reveals atypical glandular cells (AGC). Concurrent testing for high-risk human papillomavirus (HPV) is negative. A subsequent pelvic examination is completely normal, with a grossly normal cervix and no palpable adnexal masses. Which of the following is the most appropriate next step in the diagnosis of this patient?

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Cevap: Colposcopy, endocervical curettage, and endometrial biopsy

Cevap

Colposcopy, endocervical curettage, and endometrial biopsy
Atypical glandular cells (AGC) on cervical cytology is a concerning finding because it carries a relatively high risk for underlying premalignant or malignant disease, including cervical adenocarcinoma in situ, invasive cervical adenocarcinoma, and endometrial adenocarcinoma. Because of this risk, all women found to have AGC require immediate histologic evaluation; expectant management is inadequate, even if concurrent HPV testing is negative. The standard initial evaluation for all patients with AGC includes colposcopy to visualize the ectocervix and endocervical curettage (ECC) to sample the endocervical canal. Furthermore, because AGC can originate from the upper genital tract, an endometrial biopsy is explicitly indicated in all women aged 35 years and older, as well as in women under 35 who have risk factors for endometrial hyperplasia or cancer (such as obesity, nulliparity, or chronic anovulation). Since this patient is 42 years old and has significant risk factors (nulliparity and obesity), the most appropriate step is a comprehensive evaluation comprising colposcopy, ECC, and an endometrial biopsy.

Adım Adım Çözüm

1
Analyze the cytology results and the patient's demographics.
The patient has atypical glandular cells (AGC) on a Pap test, is 42 years old, and has significant risk factors for endometrial cancer (obesity, nulliparity).
AGC carries a high risk for cervical and endometrial malignancy, and the specific diagnostic pathway depends heavily on the patient's age and clinical risk factors.
2
Determine the required evaluation for the cervix.
All patients with AGC require colposcopy and endocervical curettage (ECC).
Glandular cells can originate from the endocervical canal or the transformation zone, necessitating direct visualization and sampling.
3
Determine if additional endometrial evaluation is necessary.
An endometrial biopsy is required.
Current guidelines mandate endometrial sampling for any woman with AGC who is 35 years of age or older, or who has risk factors for endometrial cancer.

Anahtar Kavram

Diagnostic algorithm for atypical glandular cells (AGC) on cervical cytology
Tahmini Süre:1m 15s
Soru 5231Soru →

An uncomplicated first-time mother, 22 years of age, is evaluated in the labor and delivery ward at term (38 weeks and 5 days). She was admitted earlier today in spontaneous labor. Her membranes ruptured naturally two hours ago with clear fluid noted. Her current vital signs are within normal limits.

Pelvic examination reveals a cervix that is 7 cm dilated and fully effaced, with the fetal vertex at 0 station. An internal intrauterine pressure catheter and a fetal scalp electrode are placed. Contractions are adequate, occurring every 3 minutes and lasting 60 seconds.

Review of the electronic fetal monitoring tracing over the past 30 minutes shows a baseline heart rate of 135/min with moderate beat-to-beat variability. Frequent, sudden drops in the fetal heart rate to 75/min are observed. These drops reach their nadir in less than 30 seconds, last for approximately 45 seconds, and are not consistently synchronized with the onset of uterine contractions.

Nursing staff has already assisted the patient into a left-lateral resting position and administered a 500 mL intravenous bolus of lactated Ringer's, yet the fetal heart rate pattern persists without improvement.

Based on the clinical presentation, which of the following is the most appropriate next step in management?

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Cevap: Initiate an amnioinfusion

Cevap

Initiate an amnioinfusion
The correct answer is to initiate an amnioinfusion. The patient is experiencing recurrent variable decelerations, which are defined by abrupt decreases in the fetal heart rate (onset to nadir of < 30 seconds) that are not consistently timed with uterine contractions. These are primarily caused by umbilical cord compression, which is common following the rupture of membranes. When first-line intrauterine resuscitative measures—such as maternal repositioning (to relieve caval compression and alter cord position) and intravenous fluid boluses—fail to resolve the decelerations, an amnioinfusion is the next best step. This procedure involves instilling normal saline or lactated Ringer's into the uterine cavity via an intrauterine pressure catheter to artificially restore amniotic fluid volume, cushion the umbilical cord, and alleviate the compression.

Adım Adım Çözüm

1
Interpret the fetal heart rate (FHR) tracing from the clinical description.
The tracing shows abrupt decreases in FHR (onset to nadir in <30 seconds) that drop 15 or more beats/min and last 15 or more seconds, which defines variable decelerations.
Accurate identification of the deceleration pattern is required to determine the underlying etiology.
2
Correlate the deceleration pattern with its physiologic cause.
Variable decelerations are caused by umbilical cord compression, often exacerbated by oligohydramnios or rupture of membranes.
Management must be tailored to the specific pathophysiology of the FHR abnormality.
3
Evaluate the response to initial resuscitative interventions.
The patient has already received first-line conservative management (left-lateral repositioning and an intravenous fluid bolus) without resolution of the decelerations.
Persistent recurrent variable decelerations require an escalation of therapy to prevent fetal acidemia.
4
Determine the most appropriate next therapeutic step.
Amnioinfusion is indicated.
Instilling saline into the uterine cavity artificially replaces amniotic fluid, thereby cushioning the umbilical cord and directly relieving the compression.

Anahtar Kavram

Recurrent variable decelerations are caused by umbilical cord compression and are managed first with maternal repositioning, followed by amnioinfusion if initial measures fail.
Soru 5232Soru →

A 2929-year-old woman, gravida 22, para 11, at 3636 weeks gestation presents to the clinic for a routine prenatal visit. Her pregnancy has been uncomplicated. She reports normal fetal movement and denies uterine contractions, vaginal bleeding, or leakage of fluid. Her first pregnancy was complicated by early-onset neonatal sepsis in the infant; blood cultures from the newborn grew *Streptococcus agalactiae*. The patient has a medical history significant for a severe allergic reaction to amoxicillin during childhood, which resulted in anaphylaxis and required epinephrine administration. During the current pregnancy, a midstream urine culture obtained at 1212 weeks gestation showed no growth. Her vital signs and physical examination today are unremarkable. The fetal heart rate is 145145/min. Which of the following is the most appropriate next step regarding the prevention of early-onset neonatal infection in this patient?

Cevabı ve açıklamayı göster

Cevap: Obtain a rectovaginal swab for *Streptococcus agalactiae* culture and antimicrobial susceptibility testing

Cevap

The correct action is to obtain a rectovaginal swab for culture and antimicrobial susceptibility testing.
This patient has a history of a previous infant with invasive *Streptococcus agalactiae* (Group B Streptococcus, or GBS) disease, which is an absolute indication for intrapartum antibiotic prophylaxis (IAP) regardless of current colonization status. Typically, patients with this history do not require routine rectovaginal GBS screening at 3636-3838 weeks. However, an important clinical exception exists for patients with a severe, high-risk penicillin allergy (e.g., anaphylaxis, angioedema). First-line IAP is intravenous penicillin or ampicillin, and cefazolin is used for low-risk penicillin allergies. For high-risk penicillin allergies, clindamycin is the preferred alternative. Because GBS resistance to clindamycin is highly prevalent, it can only be used if the isolate is proven susceptible via antimicrobial susceptibility testing. Therefore, this patient must have a rectovaginal swab collected now to determine clindamycin susceptibility, enabling targeted and appropriate antibiotic therapy during labor rather than defaulting to vancomycin.

Adım Adım Çözüm

1
Identify the patient's baseline requirement for Group B Streptococcus (GBS) prophylaxis.
The patient has a history of a previous infant with invasive GBS disease (*Streptococcus agalactiae* sepsis), which establishes an absolute indication for intrapartum antibiotic prophylaxis (IAP) in all subsequent pregnancies.
This historical risk factor supersedes any current culture results, meaning the patient will definitely receive IAP during labor.
2
Evaluate the patient's allergy status to determine the appropriate antibiotic regimen.
The patient has a severe, high-risk penicillin allergy (anaphylaxis).
First-line IAP (penicillin or ampicillin) and low-risk alternatives (cefazolin) are strictly contraindicated due to the risk of life-threatening cross-reactivity.
3
Determine the preferred alternative antibiotic for high-risk penicillin allergies.
Clindamycin is the preferred alternative agent, but it can only be administered if the specific GBS isolate is proven to be susceptible.
There are high rates of clindamycin resistance among GBS isolates. If susceptibility is unknown, intravenous vancomycin must be used instead.
4
Formulate the immediate clinical plan for the 36-week visit.
A rectovaginal swab must be obtained today strictly for the purpose of antimicrobial susceptibility testing.
Even though the patient already qualifies for IAP and wouldn't normally need a swab, obtaining the culture allows for susceptibility testing. This promotes antibiotic stewardship by potentially allowing the use of clindamycin and avoiding empiric vancomycin.

Anahtar Kavram

Management of Group B Streptococcus (GBS) prophylaxis in pregnant patients with a previous GBS-affected infant and a severe penicillin allergy.
Soru 5233Soru →

Following the spontaneous onset of regular contractions, a multiparous patient at 38 weeks gestation is admitted to the delivery unit. She is 31 years old (gravida 2, para 1). Her prenatal history is significant for a mid-trimester anatomy ultrasound demonstrating a low-lying placenta; however, a follow-up transvaginal ultrasound at 32 weeks confirmed that the placental edge had migrated 4 cm away from the internal cervical os. Her vital signs upon admission are temperature 37.0°C (98.6°F), blood pressure 118/76 mm Hg, and heart rate 84/min.

Cervical examination demonstrates 6 cm dilation, 100% effacement, and 0 station with a tense, bulging amniotic sac. The baseline fetal heart rate is 140/min with moderate variability and no decelerations. Ten minutes later, the patient's membranes spontaneously rupture. Immediately following the rupture, a large gush of blood-tinged fluid is observed, rapidly followed by frank, bright red vaginal bleeding. The patient's uterine tone remains soft between contractions, and she explicitly denies any new, sudden, or tearing abdominal pain. Simultaneous evaluation of the fetal monitor reveals a precipitous drop in the fetal heart rate to 60/min. Three minutes later, the bradycardia persists without any sign of recovery.

Which of the following is the most appropriate next step in management?

Cevabı ve açıklamayı göster

Cevap: Emergent cesarean delivery

Cevap

Emergent cesarean delivery is the most appropriate next step due to the high suspicion for a ruptured vasa previa causing rapid fetal exsanguination.
The correct response is emergent cesarean delivery. This patient is exhibiting the pathognomonic triad of a ruptured vasa previa: rupture of membranes, followed by painless vaginal bleeding, and culminating in rapid fetal deterioration (prolonged bradycardia or sinusoidal pattern). Her history of a resolved low-lying placenta is a classic risk factor; as the bulk of the placenta migrates toward the fundus, it can leave behind membranous fetal vessels spanning the cervical os. When the membranes spontaneously ruptured, these unprotected fetal vessels were torn. Because the bleeding is fetal in origin, even a small volume of visible blood represents a massive, life-threatening hemorrhage for the fetus. Immediate surgical delivery is the only intervention that can prevent fetal demise.

Adım Adım Çözüm

1
Identify the classic clinical triad presented in the vignette.
The patient experiences spontaneous rupture of membranes, immediately followed by painless frank vaginal bleeding and a sudden, prolonged fetal bradycardia.
Recognizing this triad is critical for distinguishing vasa previa rupture from other causes of intrapartum bleeding.
2
Correlate the acute presentation with the patient's prenatal history.
The patient had a low-lying placenta that 'resolved' by 32 weeks.
As a low-lying placenta migrates upward with the growing uterus, it can leave behind aberrant, unprotected fetal vessels (vasa previa) traversing the fetal membranes over the internal cervical os.
3
Differentiate the etiology from other obstetric emergencies.
The absence of sudden, tearing abdominal pain and the presence of a soft uterus between contractions make placental abruption or uterine rupture highly unlikely.
The bleeding is entirely fetal in origin. Because the total fetal blood volume is small (approximately 250-300 mL at term), rupture of these vessels leads to rapid fetal exsanguination and sudden bradycardia.
4
Determine the definitive management.
The fetus is actively exsanguinating and exhibiting a terminal heart rate pattern.
Immediate emergent cesarean delivery is required to prevent fetal demise. Any delay for diagnostic testing or conservative measures will result in fetal death.

Anahtar Kavram

Vasa Previa Rupture and Intrapartum Management
Tahmini Süre:2m 0s
Soru 5234Soru →

A 2-month-old female infant is brought to the pediatrician by her parents due to noisy breathing. The parents state they first noticed the sound when she was three weeks old. The noise is characterized as a high-pitched sound that is most prominent when the infant is crying, feeding, or lying in a supine position. The noisy breathing seems to partially resolve when she is asleep or placed in a prone position. She has had no fever, cough, or rhinorrhea. The infant breastfeeds vigorously, and her growth chart shows she has increased from the 50th percentile for weight at birth to the 60th percentile currently. On physical examination, vital signs are normal for her age. A high-pitched inspiratory sound is auscultated over the neck, but there is no evidence of cyanosis, intercostal retractions, or respiratory distress. Lung auscultation is otherwise clear bilaterally. Which of the following is the most appropriate next step in management?

Cevabı ve açıklamayı göster

Cevap: Reassure the parents and observe clinically

Cevap

Reassure the parents and observe clinically.
The correct approach for a thriving infant with classic symptoms of laryngomalacia is clinical observation and reassurance. Laryngomalacia presents as an inspiratory stridor that is exacerbated by crying, feeding, or a supine position due to the dynamic collapse of immature supraglottic structures. Because this infant is gaining weight well and exhibits no signs of severe respiratory distress (like retractions or cyanosis), invasive diagnostics or surgical interventions are not indicated. The condition typically resolves on its own by 12 to 18 months of age.

Adım Adım Çözüm

1
Analyze the patient's symptom characteristics and onset chronicity.
The infant has chronic, positional inspiratory stridor starting at 3 weeks of age, worsening when supine or crying, and improving when prone or asleep.
Identifying the onset and exacerbating factors points away from infectious causes and narrows the differential diagnosis to congenital upper airway anomalies.
2
Assess the infant's growth trajectory and overall clinical stability.
The infant is feeding well, gaining weight appropriately, and lacks signs of acute respiratory distress.
Determining the severity of the condition dictates whether invasive intervention is needed or if conservative management is sufficient.
3
Formulate a diagnosis and select the appropriate management plan.
The clinical picture confirms uncomplicated laryngomalacia, for which the gold standard of care is conservative observation.
Uncomplicated laryngomalacia resolves spontaneously by 12 to 18 months of age as the airway cartilages naturally mature and stiffen.

Anahtar Kavram

Laryngomalacia is the most common cause of inspiratory stridor in infants, characterized by supraglottic collapse that worsens when supine or agitated. In the absence of feeding difficulties or failure to thrive, it is managed conservatively with parental reassurance and observation.
Soru 5235Soru →

An uncomplicated pregnancy in a primigravid patient progresses to spontaneous labor at 3838 weeks and 22 days of gestation. Upon admission to the obstetric triage unit, maternal vital signs are stable, and the cervix is dilated to 5 cm5\text{ cm} and 100%100\% effaced. Uterine contractions occur every 33 minutes. Shortly after admission, the amniotic membranes spontaneously rupture, revealing a large amount of bright red vaginal bleeding. Concurrent evaluation of the cardiotocogram reveals a smooth, undulating fetal heart rate baseline of 140/min140/\text{min}, oscillating with an amplitude of 15/min15/\text{min} and a frequency of 44 cycles per minute. Baseline variability is otherwise absent, and no accelerations or decelerations are visualized. The patient has not received any systemic opioids or local anesthetics. Which of the following is the most appropriate next step in management?

Cevabı ve açıklamayı göster

Cevap: Immediate cesarean delivery

Cevap

Immediate cesarean delivery
The most appropriate next step in management is immediate cesarean delivery. This patient's presentation—sudden bright red vaginal bleeding coincident with spontaneous rupture of membranes, followed immediately by a sinusoidal fetal heart rate (FHR) pattern—is pathognomonic for ruptured vasa previa. A sinusoidal FHR pattern is a Category III tracing characterized by a smooth, undulating sine-wave-like baseline (frequency of 3-5 cycles/minute, amplitude of 5-15/min) and absent baseline variability. It is a classic manifestation of severe fetal anemia and hypoxia, which in this case results from fetal exsanguination through the torn aberrant chorionic vessels. Because the bleeding is fetal in origin, rapid exsanguination and fetal demise can occur within minutes. Therefore, all Category III tracings, including true sinusoidal patterns without reassuring signs, require prompt delivery, invariably via emergent cesarean section.

Adım Adım Çözüm

1
Analyze the clinical presentation upon rupture of membranes.
The patient experiences a sudden gush of bright red vaginal bleeding immediately following spontaneous rupture of membranes.
Bleeding concurrent with membrane rupture is a classic hallmark of ruptured vasa previa (tearing of unprotected fetal vessels).
2
Interpret the fetal heart rate (FHR) tracing.
The FHR tracing shows a smooth, sine-wave-like undulating pattern with absent variability, a frequency of 4 cycles per minute, and an amplitude of 15/min.
These specific parameters define a sinusoidal FHR pattern, which is a Category III tracing indicative of severe fetal anemia and hypoxia (in this case, secondary to fetal exsanguination).
3
Determine the most appropriate management based on the FHR category.
Immediate cesarean delivery is selected.
A Category III FHR tracing is highly predictive of abnormal fetal acid-base status and requires immediate, emergent delivery to prevent fetal demise, making any conservative or resuscitative measures inappropriate and dangerous.

Anahtar Kavram

A sinusoidal fetal heart rate pattern in the setting of vaginal bleeding upon membrane rupture strongly suggests vasa previa with fetal exsanguination, which is a Category III tracing requiring immediate emergent cesarean delivery.
Soru 5236Soru →

Review the following patient scenarios involving complex medical histories. Select the most appropriate contraceptive method for each patient based on the World Health Organization Medical Eligibility Criteria (WHO MEC) and clinical efficacy.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

A 34-year-old G2P2 with systemic lupus erythematosus and a positive lupus anticoagulant. Vital signs are normal. She desires long-term, reversible contraception but has a history of an unprovoked deep vein thrombosis.
A 26-year-old nulligravida with a BMI of 31 kg/m², prior Roux-en-Y gastric bypass surgery, and a known bicornuate uterus. Pelvic exam confirms normal adnexa. She seeks highly effective, maintenance-free contraception.
A 38-year-old G3P3 who smokes one pack of cigarettes daily. Blood pressure is 128/82 mmHg. She reports debilitating monthly pelvic pain during menses and seeks reliable pregnancy prevention.
A 29-year-old nulligravida presenting 72 hours after unprotected intercourse. Exam reveals mucopurulent cervical discharge and cervical motion tenderness. Vital signs: T 37.8°C, HR 90. She urgently requests emergency pregnancy prevention.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

The copper IUD is matched to the patient with SLE and antiphospholipid antibodies. The etonogestrel implant is matched to the patient with gastric bypass and a bicornuate uterus. The LNG-IUD is matched to the smoker over 35 with dysmenorrhea. Oral ulipristal acetate is matched to the patient needing emergency contraception with active cervicitis.
Each clinical scenario contains specific medical conditions that dictate the safety and efficacy of contraceptive methods according to the WHO Medical Eligibility Criteria. Matching requires identifying the absolute contraindications (MEC 4) or relative contraindications (MEC 3) in each vignette to isolate the single most appropriate method.

Adım Adım Çözüm

1
Evaluate the patient with SLE, positive lupus anticoagulant, and history of DVT.
Identify that both estrogen and progestin-containing methods present unacceptable thromboembolic risks in this highly hypercoagulable state.
This rules out implants, oral pills, and hormone-releasing IUDs, leaving the non-hormonal Copper IUD as the safest choice.
2
Evaluate the patient with a Roux-en-Y gastric bypass and a bicornuate uterus.
Identify that oral absorption is compromised and the uterine cavity is structurally abnormal.
This rules out oral contraceptive pills (due to malabsorption) and all intrauterine devices (due to cavity distortion), leaving the Etonogestrel subdermal implant.
3
Evaluate the 38-year-old smoker with severe dysmenorrhea.
Identify that combined hormonal contraceptives are contraindicated due to age over 35 and heavy smoking.
The Levonorgestrel-releasing IUD provides excellent contraception without cardiovascular risk and directly treats the heavy bleeding and pain associated with dysmenorrhea.
4
Evaluate the patient requiring emergency contraception who has signs of acute pelvic inflammatory disease (PID).
Identify that intrauterine device insertion is contraindicated during an active pelvic infection.
Because it has been 72 hours, Oral ulipristal acetate is chosen over levonorgestrel as it maintains higher efficacy up to 120 hours.

Anahtar Kavram

Application of the WHO Medical Eligibility Criteria (MEC) for Contraceptive Use in complex medical scenarios
Soru 5237Soru →

A 28-year-old primigravid woman presents for her first prenatal visit at 7 weeks gestation. She has no significant past medical history and takes only prenatal vitamins. A transvaginal ultrasound confirms a viable intrauterine pregnancy consistent with her last menstrual period. The physician outlines the schedule of routine prenatal testing and evaluations she will undergo throughout her pregnancy. Arrange the following routine prenatal interventions in the correct chronological order in which they should be performed, from earliest in the pregnancy to latest.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct chronological sequence is: 1) Screening for asymptomatic bacteriuria with urine culture, 2) Measurement of nuchal translucency and maternal serum PAPP-A, 3) Detailed fetal anatomic survey via ultrasound, 4) 50-g 1-hour oral glucose challenge test, 5) Rectovaginal culture for group B Streptococcus.
The correct sequence strictly follows standard obstetric guidelines for low-risk pregnancies. Routine labs, including a urine culture for asymptomatic bacteriuria, are collected at the first prenatal visit. First-trimester combined aneuploidy screening (nuchal translucency and PAPP-A) is performed at 11 to 14 weeks. A detailed fetal anatomic survey ultrasound is optimally conducted at 18 to 22 weeks. Gestational diabetes screening with a 50-g glucose challenge test is universal at 24 to 28 weeks. Finally, group B Streptococcus screening via rectovaginal swab is collected at 36 to 37 6/7 weeks.

Adım Adım Çözüm

1
Identify the timing of initial prenatal laboratories.
Screening for asymptomatic bacteriuria (urine culture) is performed at the initial prenatal visit, usually before 10-12 weeks gestation.
Early detection and treatment of asymptomatic bacteriuria prevents progression to pyelonephritis.
2
Identify the timing of first-trimester aneuploidy screening.
Measurement of nuchal translucency and maternal serum PAPP-A is performed between 11 and 14 weeks gestation.
This specific window is required for accurate interpretation of nuchal translucency and first-trimester serum markers.
3
Identify the timing of the routine fetal anatomic evaluation.
A detailed fetal anatomic survey via ultrasound is performed between 18 and 22 weeks gestation.
Fetal structures are large enough to be adequately visualized and assessed for anomalies during this second-trimester window.
4
Identify the timing of gestational diabetes screening.
The 50-g 1-hour oral glucose challenge test is performed between 24 and 28 weeks gestation.
Human placental lactogen and other diabetogenic hormones peak in the late second and early third trimesters, making this the optimal time for screening.
5
Identify the timing of group B Streptococcus screening.
A rectovaginal culture for group B Streptococcus is collected between 36 and 38 (37 6/7) weeks gestation.
Cultures are valid for 5 weeks; testing at this time provides the most accurate prediction of GBS colonization at the time of term delivery.

Anahtar Kavram

Chronological timeline of routine prenatal screening and preventative care during an uncomplicated pregnancy.
Tahmini Süre:1m 0s
Soru 5238Soru →

Match the following clinical and laboratory findings of female genital tract infections to their most appropriate first-line pharmacotherapy and partner management strategy.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Öğeler

Thin, homogenous, grayish-white vaginal discharge; pH 5.55.5; wet mount shows stippled epithelial cells with obscured borders.
Profuse, yellow-green, frothy vaginal discharge; punctate cervical hemorrhages; wet mount shows motile, flagellated protozoa.
Intense vulvar pruritus; thick, white, curdy vaginal discharge; vaginal pH 4.24.2; KOH prep reveals budding yeast and pseudohyphae.
Mucopurulent cervical discharge; easily induced cervical bleeding (friability); positive nucleic acid amplification test (NAAT) for an obligate intracellular bacterium.

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Bacterial vaginosis is treated with a 7-day course of metronidazole without partner treatment. Trichomoniasis requires a 7-day course of metronidazole with partner treatment. Vulvovaginal candidiasis is treated with a single dose of fluconazole without partner treatment. Chlamydia requires a 7-day course of doxycycline with partner treatment.
Each clinical scenario presents pathognomonic features of a specific gynecologic infection, which dictates both the choice of pharmacotherapy and the need for partner management. Bacterial vaginosis (clue cells, high pH) and trichomoniasis (motile protozoa) both utilize oral metronidazole, but only trichomoniasis requires partner treatment. Vulvovaginal candidiasis (normal pH, pseudohyphae) is treated with fluconazole without partner treatment. Chlamydia (mucopurulent cervicitis, positive NAAT) is treated with doxycycline and requires partner treatment.

Adım Adım Çözüm

1
Analyze the clinical presentation and diagnostic findings for each patient to identify the etiologic pathogen.
The pathogens are identified as Gardnerella vaginalis (bacterial vaginosis), Trichomonas vaginalis, Candida albicans, and Chlamydia trachomatis, respectively.
Accurate diagnosis based on discharge characteristics, pH, and microscopy is the prerequisite for selecting the correct antimicrobial therapy.
2
Select the guideline-concordant antimicrobial agent and regimen for each infection.
BV and Trichomoniasis (in women) require 7 days of oral metronidazole. Candidiasis requires a single dose of fluconazole. Chlamydia requires 7 days of doxycycline.
Following current CDC STI guidelines ensures optimal eradication and minimizes treatment failure.
3
Determine if concurrent treatment of sexual partners is necessary.
Partner treatment is indicated for STIs (Trichomoniasis and Chlamydia) but not for dysbiosis or opportunistic fungal overgrowth (BV and Candidiasis).
Treating partners for STIs prevents reinfection and halts community transmission.

Anahtar Kavram

Diagnosis and management of common gynecologic infections, including indications for concurrent partner treatment.
Tahmini Süre:1m 30s
Soru 5239Soru →

An otherwise healthy 2525-year-old woman, gravida 11, para 00, is evaluated in the clinic at 3030 weeks gestation for a scheduled prenatal check-up. She mentions noticing puffiness around her ankles by the end of the day, which generally resolves after a night's sleep. She denies headaches, blurred vision, or abdominal pain. Vital signs show a temperature of 37.0∘C37.0^\circ\text{C} (98.6∘F98.6^\circ\text{F}), blood pressure of 112/68 mm Hg112/68\text{ mm Hg}, heart rate of 86/min86/\text{min}, and respiratory rate of 16/min16/\text{min}. Physical examination reveals trace, bilateral dependent edema of the lower extremities but is otherwise unremarkable. A urine dipstick shows no protein or glucose.

The patient is highly anxious regarding laboratory results from her previous visit at 2828 weeks gestation, which she reviewed online. The results are as follows:

Hemoglobin: 11.5 g/dL11.5\text{ g/dL}
Leukocyte count: 14,200/mm314,200/\text{mm}^3
Platelet count: 220,000/mm3220,000/\text{mm}^3
Serum creatinine: 0.5 mg/dL0.5\text{ mg/dL}

Based on the clinical presentation and laboratory findings, which of the following is the most appropriate next step in management?

Cevabı ve açıklamayı göster

Cevap: Explain that her findings are expected in pregnancy and no further testing is required

Cevap

Explain that her findings are expected in pregnancy and no further testing is required
The correct action is to explain that her findings are expected in pregnancy and no further testing is required. Pregnancy induces significant maternal physiologic adaptations across multiple organ systems. Blood volume expands (with plasma volume increasing proportionally more than red blood cell mass), leading to a dilutional decrease in hemoglobin concentration; however, a hemoglobin level ≥11.0 g/dL\geq 11.0\text{ g/dL} in the first and third trimesters, or ≥10.5 g/dL\geq 10.5\text{ g/dL} in the second trimester, is considered normal. Mild leukocytosis (typically up to 15,000/mm315,000/\text{mm}^3 during pregnancy and even higher during labor) is a normal physiologic stress response. Renal blood flow and glomerular filtration rate (GFR) increase by approximately 50%, which leads to increased clearance of creatinine and a consequently lower normal range for serum creatinine (0.4−0.8 mg/dL0.4-0.8\text{ mg/dL}) compared to the nonpregnant state. Furthermore, dependent lower extremity edema is a classic, expected finding late in pregnancy due to sodium retention and mechanical compression of the inferior vena cava by the gravid uterus. Because this patient is asymptomatic (no signs of infection) and has normal blood pressure with a negative urine dipstick, all her clinical and laboratory findings are purely physiologic. The most appropriate management is reassurance.

Adım Adım Çözüm

1
Evaluate the patient's clinical symptoms and vital signs.
The patient has mild dependent edema, strictly normal blood pressure, and no signs of severe preeclampsia.
To rule out hypertensive disorders of pregnancy, which would require urgent intervention.
2
Interpret the laboratory findings in the context of normal pregnancy adaptations.
Hemoglobin of 11.5 g/dL11.5\text{ g/dL}, leukocyte count of 14,200/mm314,200/\text{mm}^3, and creatinine of 0.5 mg/dL0.5\text{ mg/dL} are all well within normal limits for the third trimester.
Normal reference ranges shift significantly during pregnancy due to systemic physiologic changes.
3
Determine the appropriate management plan based on the findings.
Reassurance and routine prenatal care are indicated.
Because all findings are physiologic, medical interventions or further diagnostic workups are unnecessary.

Anahtar Kavram

Normal maternal physiologic adaptations to pregnancy include mild dilutional anemia, baseline leukocytosis, decreased serum creatinine (due to increased GFR), and dependent lower extremity edema.
Soru 5240Soru →

A 1616-day-old male infant, born at 2727 weeks gestation, is being evaluated in the neonatal intensive care unit for sudden clinical deterioration. For the past 2424 hours, he has been managed for necrotizing enterocolitis with bowel rest, nasogastric decompression, intravenous fluids, and broad-spectrum antibiotics. Over the last 22 hours, the infant has developed recurrent apnea and profound bradycardia. His temperature is 35.1∘C35.1^\circ\text{C} (95.2∘F95.2^\circ\text{F}), heart rate is 190190/min, respiratory rate is 7070/min, and blood pressure is 40/20 mm Hg40/20 \text{ mm Hg}. Physical examination reveals a grossly distended, shiny, and erythematous abdomen with absent bowel sounds. Capillary refill time is 55 seconds. A stat bedside cross-table lateral abdominal radiograph reveals massive pneumoperitoneum. Which of the following is the most appropriate next step in the management of this patient?

Cevabı ve açıklamayı göster

Cevap: Proceed with immediate exploratory laparotomy or peritoneal drainage

Cevap

Proceed with immediate exploratory laparotomy or peritoneal drainage
The correct answer identifies that the infant has suffered an intestinal perforation, a life-threatening complication of necrotizing enterocolitis. The cross-table lateral radiograph showing massive pneumoperitoneum (free air) confirms the perforation. In the setting of NEC, pneumoperitoneum is an absolute indication for immediate surgical intervention, which may consist of an exploratory laparotomy with bowel resection or, in highly unstable extremely low birth weight infants, primary peritoneal drainage.

Adım Adım Çözüm

1
Assess the patient's clinical and hemodynamic status.
The premature infant demonstrates signs of severe septic shock, including hypothermia, tachycardia, tachypnea, hypotension, and prolonged capillary refill.
Recognizing instability dictates the urgency of intervention and precludes unsafe diagnostic transfers.
2
Interpret the physical examination and radiographic findings.
The shiny, erythematous abdomen combined with massive pneumoperitoneum on the radiograph confirms full-thickness intestinal perforation.
Abdominal wall erythema and pneumoperitoneum are hallmark signs of advanced (Stage IIIB) necrotizing enterocolitis with perforation.
3
Determine the definitive treatment based on findings.
Immediate surgical intervention (laparotomy or primary peritoneal drainage) is indicated.
While necrotizing enterocolitis is initially managed medically, the development of a pneumoperitoneum is an absolute indication for emergency surgery to control the source of sepsis.

Anahtar Kavram

The absolute indication for surgical intervention in a neonate with necrotizing enterocolitis is the presence of pneumoperitoneum (intestinal perforation) or rapid clinical deterioration despite maximal medical therapy.
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