Surgery

1344 soru

Tüm türler1,344 Çoktan seçmeli692 Çoklu seçim59 Sayısal38 Eşleştirme264 Sıralama291

Twenty-four hours after undergoing an elective open inguinal hernia repair, a 29-year-old man is found to have a temperature of $38.3^\circ\text{C}$ ( $101.0^\circ\text{F}$ ). His other vital signs include a pulse of $84/\text{min}$ , respirations of $14/\text{min}$ , and blood pressure of $126/82 \text{ mm Hg}$ . The patient is currently tolerating a liquid diet but complains of moderate pain around his groin when moving or taking deep breaths. Auscultation of the chest reveals decreased breath sounds at the lung bases bilaterally without crackles or wheezes. The surgical dressing is clean and intact, with no surrounding erythema or induration. Which of the following is the most appropriate next step in management?

Ensure adequate pain control and prescribe breathing exercises

Obtain a midstream urine sample for culture

Commence therapy with broad-coverage intravenous antibiotics

Perform bilateral lower extremity venous ultrasonography

Open the surgical wound to assess for deep fascial infection

Cevabı ve açıklamayı göster

Cevap: Ensure adequate pain control and prescribe breathing exercises

Cevap

The most appropriate management is to ensure adequate pain control and prescribe breathing exercises.

The correct answer is to ensure adequate pain control and prescribe breathing exercises. This patient is presenting with a low-grade fever on postoperative day 1 (within 24-48 hours of surgery). Early postoperative fever is extremely common and is primarily caused by the normal physiologic release of inflammatory cytokines (such as IL-1, IL-6, and TNF-alpha) secondary to tissue trauma. It is often accompanied by atelectasis, which is supported by the physical finding of decreased breath sounds at the lung bases and the patient's reluctance to take deep breaths due to incisional pain. The most appropriate management is supportive care, which includes optimizing pain control so the patient can take deep breaths, perform respiratory exercises, and mobilize early to prevent further pulmonary complications.

Adım Adım Çözüm

Evaluate the timing of the patient's fever relative to the surgical procedure.

The fever is occurring exactly 24 hours after surgery (postoperative day 1).

Timing is the most critical factor in determining the likely etiology of a postoperative fever.

Assess the clinical findings and vital signs.

The patient has a low-grade fever, basilar atelectasis on physical exam, and pain limiting deep breaths, with no signs of local wound infection or hemodynamic instability.

Identifying the source of the fever helps rule out immediate, life-threatening infectious complications.

Determine the appropriate intervention based on the presumed diagnosis.

The patient is experiencing a normal physiologic response to surgery with associated atelectasis. Supportive care is required.

Early postoperative fever is typically driven by inflammatory cytokines and atelectasis, which is managed by encouraging deep breaths and early ambulation.

Anahtar Kavram

Fever within the first 48 hours after surgery is most commonly due to the physiologic release of inflammatory cytokines and secondary atelectasis; it should be managed supportively with adequate analgesia to promote deep breathing and ambulation.

Soru 242Soru →

A 48-year-old woman is evaluated in the post-anesthesia care unit two hours after an elective laparoscopic cholecystectomy for symptomatic cholelithiasis. Her medical history is significant for major depressive disorder and Graves disease. Her home medications include sertraline 100 mg daily and methimazole 5 mg daily, though she admits to missing several doses of methimazole over the past month. Anesthesia was induced with propofol and succinylcholine, and maintained with sevoflurane. Fentanyl and ondansetron were administered during the procedure.

The patient is now severely agitated and disoriented. Her temperature is 39.4°C (102.9°F), heart rate is 148/min, blood pressure is 172/95 mmHg, and respiratory rate is 24/min. Physical examination reveals a profusely diaphoretic and flushed woman. Her pupils are dilated. Neurological examination demonstrates spontaneous ocular clonus. Deep tendon reflexes are 4+ in both the upper and lower extremities, with sustained ankle clonus present bilaterally. Her abdomen is soft with hyperactive bowel sounds. No muscle rigidity is noted.

Which of the following are the most appropriate immediate steps in the management of this patient? (Select 2)

Geçerli olan tümünü seçin

Administration of intravenous lorazepam

Administration of oral cyproheptadine

Administration of intravenous propranolol and propylthiouracil

Administration of intravenous dantrolene

Administration of intravenous haloperidol

Cevabı ve açıklamayı göster

Cevap: Administration of intravenous lorazepam; Administration of oral cyproheptadine

Cevap

The most appropriate immediate steps are the administration of intravenous lorazepam and the administration of oral cyproheptadine.

This patient is exhibiting classic signs of Serotonin Syndrome, precipitated by the combination of her home SSRI (sertraline) and intraoperative serotonergic medications (fentanyl and ondansetron). The triad of Serotonin Syndrome includes autonomic instability (hyperthermia, tachycardia, diaphoresis), altered mental status (agitation, delirium), and distinct neuromuscular hyperactivity (spontaneous clonus, ocular clonus, hyperreflexia). The initial management of moderate to severe Serotonin Syndrome centers on discontinuing all serotonergic agents, providing supportive care, and administering intravenous benzodiazepines (e.g., lorazepam) to control agitation, lower heart rate, and reduce muscle hypertonicity. If symptoms are severe or refractory to benzodiazepines, oral cyproheptadine, a 5-HT2A receptor antagonist, is the specific antidote indicated to reverse the toxicity.

Adım Adım Çözüm

Analyze the patient's preoperative medications and intraoperative exposures.

The patient takes sertraline (an SSRI) and received fentanyl and ondansetron intraoperatively, all of which are highly serotonergic agents.

Identifying overlapping drug mechanisms is critical in diagnosing postoperative neurotoxic syndromes.

Correlate the physical exam findings with the postoperative hyperthermic toxidromes.

The presence of hyperreflexia, spontaneous ankle clonus, ocular clonus, and hyperactive bowel sounds perfectly matches Serotonin Syndrome. It rules out Malignant Hyperthermia (which presents with rigidity and hyporeflexia) and Thyroid Storm (which lacks clonus).

Specific neuromuscular findings are the key differentiators between otherwise similar postoperative hypermetabolic states.

Select the targeted pharmacological interventions for the identified toxidrome.

Lorazepam is selected for immediate control of agitation and sympathetic hyperactivity, while cyproheptadine is selected as the specific pharmacological antidote for serotonin toxicity.

Proper management requires both supportive/symptomatic control and direct reversal of the underlying receptor overstimulation.

Anahtar Kavram

Postoperative Serotonin Syndrome is triggered by the combination of chronic SSRI therapy with serotonergic intraoperative medications (like fentanyl and ondansetron). It is differentiated from Malignant Hyperthermia and Thyroid Storm primarily by the presence of hyperreflexia, clonus, and hyperactive bowel sounds.

Tahmini Süre:2m 0s

Soru 243Soru →

A 38-year-old male pedestrian is brought to the emergency department after being struck by a delivery truck at highway speeds. Upon arrival, he has agonal respirations. Physical examination reveals massive midfacial crush injuries with active oropharyngeal hemorrhage. His vital signs are temperature 35.5°C (95.9°F), blood pressure 68/35 mmHg, pulse 142/min, and respiratory rate 6/min. There are absent breath sounds over the right hemithorax and pronounced jugular venous distention. The pelvis is mechanically unstable on manual compression, and a rapidly expanding scrotal hematoma is noted. Based on Advanced Trauma Life Support (ATLS) protocols, arrange the following management steps in the most appropriate chronological order.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The proper sequence dictates addressing Airway, then Breathing, then Circulation, followed by primary survey adjuncts, and lastly secondary definitive imaging.

According to Advanced Trauma Life Support (ATLS) principles, resuscitation of a severely injured polytrauma patient must follow the sequential ABCDE algorithm. The airway (A) must be secured first; because this patient has massive facial crush injuries and active bleeding, endotracheal intubation is likely to fail, making a surgical cricothyroidotomy the required first step. Breathing (B) is assessed next; clinical signs of a tension pneumothorax (absent breath sounds, distended neck veins) necessitate immediate decompression. Circulation (C) is then addressed; the mechanically unstable bleeding pelvis must be stabilized via a binder. Only after the primary survey (ABC) is controlled should adjuncts like the FAST exam be utilized to uncover occult intra-abdominal hemorrhage. Finally, secondary imaging like a CT scan is reserved for patients who have had their immediate life-threats managed.

Adım Adım Çözüm

Address Airway (A) via surgical cricothyroidotomy

Secures the patient's airway

Massive midface trauma and oropharyngeal hemorrhage severely distort anatomy, making standard intubation contraindicated. A surgical airway must be established first to prevent immediate hypoxic death.

Address Breathing (B) via right-sided needle or finger thoracostomy

Decompresses the right hemithorax

Absent breath sounds and jugular venous distension in an unstable trauma patient suggest a right-sided tension pneumothorax. This must be relieved immediately after the airway is secured to restore venous return and oxygenation.

Address Circulation (C) via application of a noninvasive pelvic binder

Reduces pelvic volume and venous bleeding

An unstable pelvis and scrotal hematoma indicate a catastrophic pelvic ring disruption. Applying a binder is a rapid mechanical intervention to address hemorrhagic shock once the airway and breathing are stabilized.

Perform Primary Survey Adjuncts via a FAST exam

Evaluates for intraperitoneal fluid

After the ABCs are managed, a FAST exam is conducted to detect concomitant intra-abdominal bleeding that might require exploratory laparotomy.

Proceed to Secondary Evaluation via computed tomography (CT)

Obtains definitive imaging for operative or non-operative planning

Moving a patient to the CT scanner is dangerous unless their immediate life threats have been managed and their hemodynamics are sufficiently stabilized or well-understood.

Anahtar Kavram

Advanced Trauma Life Support (ATLS) Primary Survey and Prioritization in Polytrauma

Soru 244Soru →

Eight hours following an open inguinal hernia repair under spinal anesthesia, a 55-year-old man reports lower abdominal discomfort and an inability to pass urine. His vital signs are stable. Physical examination demonstrates a palpable suprapubic mass with dullness to percussion. Arrange the following steps in the most appropriate chronological sequence for the management of this patient's postoperative complication.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence is to first perform a bedside bladder ultrasound, followed by a one-time straight urethral catheterization, then observe the patient for spontaneous voiding, and finally place a continuous indwelling urethral catheter if retention recurs.

Postoperative urinary retention is a common complication following regional anesthesia. The management algorithm dictates starting with the least invasive diagnostic modality (bladder ultrasound) to confirm the diagnosis. Once retention is confirmed (typically >400-500 mL), immediate decompression is achieved via a temporary straight catheterization to minimize the risk of a urinary tract infection. The patient is then observed to determine if normal detrusor function resumes. A continuous indwelling catheter is only utilized if the patient develops recurrent retention despite the initial decompression.

Adım Adım Çözüm

Confirm the diagnosis non-invasively.

Perform a bedside bladder ultrasound.

Differentiates postoperative urinary retention from oliguria and determines the exact volume of retained urine without introducing infection risk.

Provide immediate relief of retention.

Perform a one-time straight urethral catheterization.

Safely empties the distended bladder while posing a lower infection risk than leaving a continuous catheter in place.

Allow time for anesthetic effects to dissipate.

Observe the patient for spontaneous voiding.

Normal bladder function often returns after a single decompression as the residual effects of spinal anesthesia wear off.

Manage refractory retention.

Place a continuous indwelling urethral catheter.

Necessary only if the patient experiences recurrent retention after the initial straight catheterization trial.

Anahtar Kavram

Stepwise management of postoperative urinary retention (POUR)

Soru 245Soru →

Match each classic thoracic trauma presentation with its most appropriate initial specific management step.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Cevabı ve açıklamayı göster

Cevap

Cardiac tamponade pairs with pericardiocentesis/window; flail chest pairs with pain control; tension pneumothorax pairs with immediate decompression; massive hemothorax pairs with tube thoracostomy and volume resuscitation.

Each thoracic trauma scenario presents with textbook physical exam findings that define the condition: Beck's triad for cardiac tamponade, paradoxical movement for flail chest, hyperresonance with tracheal deviation for tension pneumothorax, and dullness to percussion for massive hemothorax. Matching them correctly requires applying standard Advanced Trauma Life Support (ATLS) protocols for initial management.

Adım Adım Çözüm

Analyze the first presentation (hypotension, JVD, distant heart sounds) to identify Beck's triad.

Diagnosis of cardiac tamponade is established.

Recognizing Beck's triad directs immediate treatment to relieve pericardial pressure.

Analyze the second presentation (paradoxical inward movement of a chest wall segment).

Diagnosis of flail chest is established.

Identifying flail chest prioritizes respiratory support and pain management to maintain adequate ventilation.

Analyze the third presentation (tracheal deviation, hyperresonance, shock).

Diagnosis of tension pneumothorax is established.

Tension pneumothorax is a clinical diagnosis requiring immediate decompression prior to definitive chest tube placement.

Analyze the fourth presentation (dullness to percussion, shock, absent breath sounds).

Diagnosis of massive hemothorax is established.

Dullness (fluid) rather than hyperresonance (air) differentiates hemothorax from pneumothorax, directing treatment to fluid resuscitation and drainage.

Anahtar Kavram

Recognition of classic ATLS thoracic trauma syndromes and their immediate life-saving interventions.

Tahmini Süre:1m 30s

Soru 246Soru →

A 65-year-old man is evaluated on postoperative day 6 following an elective open sigmoid colectomy for recurrent diverticulitis. Over the past 24 hours, he has developed a fever and increasing pain at his surgical incision site. His temperature is 38.5°C (101.3°F), blood pressure is 130/80 mm Hg, and pulse is 95/min. Examination of the abdomen reveals intact surgical staples, but there is a 4-cm area of erythema, induration, and warmth around the lower half of the incision. Gentle palpation of this area yields a small amount of purulent discharge. The remainder of his abdominal examination shows mild tenderness without rebound or guarding. Which of the following is the most appropriate next step in management?

Remove the surgical staples and open the affected portion of the incision

Administer intravenous vancomycin and piperacillin-tazobactam without opening the wound

Order a computed tomography scan of the abdomen and pelvis with intravenous contrast

Perform a lower extremity venous duplex ultrasound

Reassure the patient that this is a normal physiologic response to the surgical procedure

Cevabı ve açıklamayı göster

Cevap: Remove the surgical staples and open the affected portion of the incision

Cevap

Remove the surgical staples and open the affected portion of the incision

The correct answer identifies that the patient has developed a superficial surgical site infection (SSI), which classically presents between postoperative days 5 and 7. The hallmarks of a superficial SSI are localized erythema, induration, warmth, and purulent drainage. The standard of care and most critical initial step in managing a superficial SSI is to obtain adequate source control. This is achieved by removing the staples or sutures over the affected area to open the incision, allowing the purulent material to drain fully. The wound is then typically packed and allowed to heal by secondary intention. Antibiotics are generally reserved for cases involving systemic signs of sepsis, significant surrounding cellulitis, or immunocompromise.

Adım Adım Çözüm

Analyze the patient's postoperative timeline and vital signs.

The patient has a fever on postoperative day 6.

Timing of postoperative fever provides clues to the etiology (the '5 Ws'). Postoperative days 5 to 7 typically correlate with wound infections ('Wound').

Evaluate the physical examination findings.

Erythema, induration, and purulent discharge at the incision site confirm a superficial surgical site infection (SSI).

Purulence is a definitive sign of infection requiring intervention.

Determine the most appropriate management for a superficial SSI.

The primary treatment is source control by removing staples/sutures to open the wound and allow it to drain.

Without adequate drainage, the infection will not resolve, even with antibiotic therapy.

Anahtar Kavram

The primary management of a superficial surgical site infection (typically occurring on postoperative days 5-7) is source control by opening the incision to allow for purulent drainage.

Soru 247Soru →

Match each of the following clinical presentations with the most likely underlying vascular pathology.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Cevabı ve açıklamayı göster

Cevap

The correct matches align the man with buttock claudication to Aortoiliac occlusive disease, the post-angiography man to Cholesterol atheroembolism, the young smoker to Thromboangiitis obliterans, the woman with abdominal pain to Acute-on-chronic mesenteric ischemia, and the woman with arm-exercise-induced vertigo to Subclavian steal syndrome.

Each pairing relies on identifying pathognomonic clinical features for major vascular pathologies. Aortoiliac occlusive disease (Leriche syndrome) is recognized by the triad of claudication, impotence, and absent femoral pulses. Cholesterol atheroembolism presents with blue toes but intact pulses after endovascular procedures. Thromboangiitis obliterans targets distal vessels and veins in young smokers. Acute-on-chronic mesenteric ischemia presents with a history of intestinal angina followed by sudden severe abdominal pain out of proportion to exam. Subclavian steal syndrome presents with vertebrobasilar insufficiency triggered by ipsilateral arm exercise.

Adım Adım Çözüm

Analyze the first clinical presentation detailing buttock claudication, erectile dysfunction, and absent femoral pulses.

This specific symptom triad identifies Leriche syndrome.

Recognizing this classic triad points to severe narrowing of the distal aorta and iliac arteries, known as Aortoiliac occlusive disease.

Evaluate the second presentation of cyanotic toes with intact pedal pulses following coronary angiography.

This presentation identifies blue toe syndrome caused by an iatrogenic event.

Endovascular procedures can dislodge aortic atherosclerotic plaques, leading to Cholesterol atheroembolism in small distal vessels.

Examine the third case of a young male heavy smoker with migratory superficial thrombophlebitis and distal ulcerations.

This patient demographic and symptom profile is highly specific for Buerger disease.

These findings characterize Thromboangiitis obliterans, an inflammatory vasculopathy strongly associated with tobacco use.

Assess the fourth case of chronic 'food fear' transitioning to acute, severe, out-of-proportion abdominal pain.

The chronic symptoms suggest intestinal angina, while the acute severe pain suggests acute bowel ischemia.

This progression matches Acute-on-chronic mesenteric ischemia, often due to thrombosis of a severely atherosclerotic mesenteric artery.

Analyze the fifth presentation of vertigo and diplopia triggered by left arm exercise.

These vertebrobasilar symptoms triggered by upper extremity exertion identify a 'steal' phenomenon.

Stenosis of the proximal subclavian artery causes reverse flow in the vertebral artery during arm exercise, known as Subclavian steal syndrome.

Anahtar Kavram

Clinical recognition of hallmark vascular surgery syndromes based on patient demographics, specific symptom triggers, and distinct physical exam findings.

Soru 248Soru →

A 38-year-old male construction worker is brought to the emergency department after falling approximately 25 feet from a scaffold. On arrival, his blood pressure is 72/40 mmHg, heart rate is 138/min, and respiratory rate is 24/min. He is lethargic but maintaining his airway. Bilateral breath sounds are clear and equal. The abdomen is soft, non-distended, and lacks rebound tenderness or guarding. Gentle anteroposterior compression of the iliac crests reveals abnormal outward mobility of the pelvis. Intravenous access is established, and resuscitation with uncrossmatched blood is initiated. A bedside focused assessment with sonography for trauma (FAST) examination demonstrates no free fluid in the pericardial, hepatorenal, splenorenal, or rectovesical spaces. Which of the following is the most appropriate next step in management?

Application of a pelvic circumferential compression device

Computed tomography of the abdomen and pelvis

Immediate exploratory laparotomy

Diagnostic peritoneal lavage

Retrograde urethrography

Cevabı ve açıklamayı göster

Cevap: Application of a pelvic circumferential compression device

Cevap

The most appropriate next step is the application of a pelvic circumferential compression device (pelvic binder).

In a trauma patient with hemorrhagic shock, a mechanically unstable pelvis, and a negative FAST exam, the bleeding is localized to the retroperitoneum. The immediate next step in management is the application of a pelvic circumferential compression device (pelvic binder) or a tied bedsheet around the greater trochanters. This decreases the pelvic volume and provides a tamponade effect on the bleeding venous plexus and fractured bone surfaces, stabilizing the patient's hemodynamics. If the patient remains unstable after binder application, the subsequent step would be preperitoneal packing or pelvic angiography with embolization.

Adım Adım Çözüm

Assess the patient's hemodynamic status and mechanism of injury.

The patient is in profound hemorrhagic shock (blood pressure 72/40 mmHg) following a high-altitude fall.

Identifying instability determines that immediate life-saving interventions must take precedence over definitive diagnostic imaging.

Localize the primary source of hemorrhage using physical exam and bedside diagnostics.

The chest is clear, the FAST exam is negative (ruling out massive intraperitoneal or pericardial bleeding), and the pelvis is mechanically unstable on exam.

This constellation of findings localizes the life-threatening hemorrhage to the retroperitoneal space due to a pelvic ring disruption.

Determine the appropriate intervention for retroperitoneal hemorrhage from a pelvic fracture.

Apply a pelvic binder.

A pelvic binder reduces the pelvic volume, apposing the fractured bone edges and creating a tamponade effect on the bleeding presacral venous plexus and pelvic arteries.

Anahtar Kavram

Hemodynamically unstable patients with pelvic fractures and negative FAST exams require immediate application of a pelvic binder to provide mechanical tamponade of retroperitoneal hemorrhage.

Tahmini Süre:1m 15s

Soru 249Soru →

A 48-year-old construction worker arrives at the emergency department via helicopter after being crushed by a steel beam across his hips. He is confused, pale, and diaphoretic. Vital signs demonstrate a heart rate of 138/min and a blood pressure of 72/40 mm Hg. His airway is patent and lungs are clear to auscultation bilaterally. Emergency medical personnel placed a circumferential pelvic sheet prior to transport. On evaluation, his abdomen is non-distended and soft to palpation. Inspection of the perineum reveals a scrotal hematoma and blood at the urethral meatus. Point-of-care ultrasound of the abdomen and pericardium shows no abnormal fluid collections. A portable chest radiograph is normal. Anteroposterior pelvic radiograph reveals an open-book pubic symphysis diastasis and a right sacroiliac joint disruption. Despite the rapid infusion of 2 units of uncrossmatched packed red blood cells, his blood pressure remains 75/42 mm Hg. Which of the following is the most appropriate next step in management?

Pelvic angiography with embolization

Intravenous contrast-enhanced computed tomography of the pelvis

Emergent exploratory laparotomy

Retrograde urethrography

Diagnostic peritoneal lavage

Cevabı ve açıklamayı göster

Cevap: Pelvic angiography with embolization

Cevap

Pelvic angiography with embolization

This patient has an unstable pelvic fracture and remains in hemorrhagic shock despite blood resuscitation. A negative FAST exam and a soft abdomen indicate that the source of bleeding is not intraperitoneal, but rather retroperitoneal (typically from the presacral venous plexus or branches of the internal iliac artery). For hemodynamically unstable patients with pelvic fractures and negative intraperitoneal evaluations, the next most appropriate step is pelvic angiography with embolization (or preperitoneal pelvic packing) to achieve definitive hemostasis. The previously placed pelvic binder provides temporary mechanical stabilization and helps reduce pelvic volume, but active bleeding must still be stopped.

Adım Adım Çözüm

Identify the patient's primary life-threatening condition.

The patient is in hemorrhagic shock (blood pressure 75/42 mm Hg) despite ongoing fluid and blood resuscitation.

According to advanced trauma life support protocols, addressing the cause of hemodynamic instability takes absolute precedence over all other non-life-threatening injuries (such as the suspected urethral injury).

Localize the source of the hemorrhage.

Chest radiograph and FAST are negative. The pelvis is fractured (open-book diastasis).

A negative FAST in a hypotensive patient with an unstable pelvic fracture indicates that the bleeding is retroperitoneal rather than intraperitoneal.

Determine the definitive management for retroperitoneal pelvic hemorrhage.

Pelvic angiography with embolization is indicated.

This intervention directly addresses arterial bleeding in the pelvic retroperitoneum without releasing the natural tamponade effect of the intact peritoneum.

Anahtar Kavram

In a hemodynamically unstable patient with an open-book pelvic fracture and a negative FAST exam, the source of bleeding is retroperitoneal. The next best step is pelvic angiography with embolization (or preperitoneal pelvic packing). Investigation of suspected urethral injuries must be delayed until hemodynamic stability is achieved.

Alternatif Yöntem

Preperitoneal pelvic packing is an equally valid alternative to angiography for definitive hemorrhage control in this scenario, depending on institutional resources and the immediate availability of an interventional radiologist.

Tahmini Süre:1m 15s

Soru 250Soru →

A $45$ -year-old man is evaluated on postoperative day $7$ following an emergent exploratory laparotomy and splenectomy for a grade IV splenic laceration sustained in a motor vehicle collision. For the past $48$ hours, he has reported new-onset left-sided pleuritic chest pain and persistent hiccups. His temperature is $38.9^\circ\text{C}$ ( $102.0^\circ\text{F}$ ), heart rate is $112/\text{min}$ , blood pressure is $118/74\text{ mm Hg}$ , and respiratory rate is $20/\text{min}$ . Pulse oximetry is $94\%$ on room air. Pulmonary examination reveals decreased breath sounds and dullness to percussion at the left lung base. Abdominal examination shows a well-healing midline incision and mild left upper quadrant tenderness without rebound or guarding. Laboratory studies show a leukocyte count of $16,500/\text{mm}^3$ . A chest radiograph reveals an elevated left hemidiaphragm and a moderate left-sided pleural effusion with basilar linear opacities. Which of the following is the most appropriate next step in management?

Computed tomography angiography of the chest

Chest physiotherapy and incentive spirometry

Initiation of empiric broad-spectrum intravenous antibiotics

Computed tomography scan of the abdomen

Diagnostic thoracentesis

Cevabı ve açıklamayı göster

Cevap: Computed tomography scan of the abdomen

Cevap

Computed tomography scan of the abdomen

The patient's clinical presentation is highly characteristic of a left subphrenic abscess, a well-known complication following splenectomy. Presenting typically 1 to 2 weeks postoperatively, the accumulating infected fluid irritates the diaphragm, leading to hiccups and referred shoulder or pleuritic chest pain. The associated inflammation frequently crosses the diaphragm, resulting in an elevated hemidiaphragm and a reactive, sympathetic pleural effusion on a chest radiograph. Because the primary pathology is located within the abdominal cavity, the most appropriate next step is a computed tomography (CT) scan of the abdomen. This imaging modality will definitively identify the abscess, define its anatomy, and determine whether it is amenable to CT-guided percutaneous drainage (the standard initial treatment) or if it requires surgical exploration.

Adım Adım Çözüm

Analyze the timeline and nature of the postoperative complication.

The patient has a fever, marked leukocytosis, and localized left-sided symptoms on postoperative day 7 following a splenectomy.

Identifying the 'when' and 'where' narrows down the differential diagnosis for postoperative fever (e.g., 'wound' or 'walking' timeframe, rather than early 'wind' or 'water').

Interpret the specific clinical and radiographic signs.

Hiccups indicate diaphragmatic irritation. The chest radiograph shows an elevated left hemidiaphragm and a sympathetic pleural effusion.

These findings localize the inflammatory process to the space immediately below the diaphragm (the subphrenic space).

Determine the diagnostic modality of choice.

An abdominal CT scan is required to confirm the presence, size, and exact location of a subphrenic abscess.

CT imaging is the gold standard for diagnosing intra-abdominal abscesses and is necessary to plan subsequent percutaneous or surgical drainage.

Anahtar Kavram

Patients who undergo splenectomy are at high risk for developing a left subphrenic abscess. This typically presents 1 to 2 weeks postoperatively with fever, leukocytosis, and diaphragmatic irritation (e.g., hiccups, sympathetic pleural effusion), and is best diagnosed with an abdominal CT scan.

Tahmini Süre:1m 30s

Soru 251Soru →

A 42-year-old woman is brought to the emergency department 30 minutes after a high-speed motor vehicle collision in which she was the unrestrained driver. Upon arrival, her temperature is 36.5°C (97.7°F), blood pressure is 78/52 mmHg, pulse is 135/min, and respirations are 22/min. Her airway is patent and breath sounds are clear and equal bilaterally. Oxygen saturation is 97% on room air. The abdomen is severely distended with diffuse tenderness, guarding, and rebound tenderness. Two large-bore intravenous lines are established, and fluid resuscitation is initiated. A bedside focused assessment with sonography for trauma (FAST) reveals a significant amount of anechoic free fluid in the splenorenal and hepatorenal recesses. Which of the following is the most appropriate next step in management?

Immediate exploratory laparotomy

Computed tomography (CT) scan of the abdomen and pelvis

Diagnostic peritoneal lavage

Observation with serial abdominal examinations

Angiography with selective embolization

Cevabı ve açıklamayı göster

Cevap: Immediate exploratory laparotomy

Cevap

Immediate exploratory laparotomy

The correct answer is immediate exploratory laparotomy. The algorithm for blunt abdominal trauma prioritizes assessing hemodynamic stability. This patient is clearly unstable (hypotensive and tachycardic). In unstable patients, a bedside FAST exam is performed to quickly evaluate for intraperitoneal hemorrhage. Since the FAST exam is positive (free fluid in hepatorenal and splenorenal recesses), the diagnosis of intra-abdominal hemorrhage causing shock is confirmed. The only appropriate next step to prevent exsanguination is an immediate exploratory laparotomy for hemorrhage control. Furthermore, the patient exhibits signs of peritonitis (guarding, rebound tenderness), which is an independent absolute indication for laparotomy.

Adım Adım Çözüm

Assess the patient's hemodynamic status based on vital signs.

Blood pressure of 78/52 mmHg and pulse of 135/min indicate profound hemodynamic instability (Class III/IV hemorrhagic shock).

Hemodynamic stability is the primary branch point in the blunt abdominal trauma algorithm.

Identify the source of bleeding based on the primary survey and imaging.

The FAST exam is positive for free fluid in multiple dependent recesses.

A positive FAST in the setting of trauma confirms intraperitoneal hemorrhage.

Determine the definitive treatment for an unstable patient with confirmed intraperitoneal bleeding.

The patient must be taken directly to the operating room for an exploratory laparotomy.

Any delay for further imaging (like CT) in a patient with active, uncontrolled intra-abdominal hemorrhage can be fatal.

Anahtar Kavram

Hemodynamically unstable patients with blunt abdominal trauma and a positive FAST exam require immediate exploratory laparotomy.

Soru 252Soru →

A 45-year-old woman is brought to the emergency department 30 minutes after being rescued from a residential fire. Her airway is patent, and she is hemodynamically stable. Physical examination reveals deep partial-thickness and full-thickness burns involving her entire anterior trunk, her entire right arm, and her entire right leg. Her estimated weight is $80 \text{ kg}$ . Using the Parkland resuscitation formula ( $4 \text{ mL/kg/} \% \text{TBSA}$ ), what should be the target rate of intravenous lactated Ringer solution administration, in $\text{mL/hour}$ , for the first 8 hours following her injury?

Cevabı ve açıklamayı göster

Cevap: 900

Cevap

900

The correct administration rate is

900 \text{ mL/hour}

. According to the Rule of Nines for adult patients, the anterior trunk constitutes

18\%

TBSA, an entire arm is

9\%

, and an entire leg is

18\%

, totaling

45\%

TBSA burned. Applying the given Parkland formula (

4 \text{ mL} \times \text{weight in kg} \times \% \text{TBSA}

), the total 24-hour fluid requirement is

4 \times 80 \times 45 = 14,400 \text{ mL}

. Standard burn resuscitation guidelines dictate that

50\%

of this total volume (

7,200 \text{ mL}

) must be administered over the first 8 hours following the injury. Dividing this initial volume by 8 hours yields an hourly rate of

900 \text{ mL/hour}

Adım Adım Çözüm

Calculate the Total Body Surface Area (TBSA) affected by the burns.

Anterior trunk (18%) + entire right arm (9%) + entire right leg (18%) = 45% TBSA.

Accurate estimation of the burn area using the Rule of Nines is required to calculate fluid needs.

Calculate the total volume of fluid required for the first 24 hours.

4 \text{ mL} \times 80 \text{ kg} \times 45 = 14,400 \text{ mL}

The Parkland formula is used to determine the total 24-hour resuscitation volume requirement.

Determine the fluid volume to be administered during the first 8 hours.

14,400 \text{ mL} / 2 = 7,200 \text{ mL}

Standard burn resuscitation guidelines dictate that half (50%) of the total 24-hour fluid volume must be given in the first 8 hours.

Calculate the hourly intravenous infusion rate.

7,200 \text{ mL} / 8 \text{ hours} = 900 \text{ mL/hour}

The rate is needed to properly set the infusion pump for the initial phase of resuscitation.

Anahtar Kavram

Calculation of burn fluid resuscitation rates using the Rule of Nines and the Parkland formula.

Soru 253Soru →

A 41-year-old construction worker is brought to the emergency department after falling approximately 25 feet from a scaffold. On arrival, he is moaning and only withdraws his extremities in response to painful stimuli. His temperature is 36.1°C (97.0°F), blood pressure is 74/40 mm Hg, pulse is 142/min, and respiratory rate is 26/min. Pulse oximetry is 94% on high-flow oxygen. The airway is patent, and breath sounds are present and equal bilaterally. A chest radiograph demonstrates no pneumothorax or hemothorax. The pelvis is mechanically stable to anterior-posterior and lateral compression. Abdominal examination reveals diffuse rigidity and involuntary guarding. Bilateral thigh deformities are noted. Intravenous access is established, and a massive transfusion protocol is initiated. A bedside focused assessment with sonography for trauma (FAST) is attempted but is technically inadequate due to massive subcutaneous emphysema and overlying bowel gas. Which of the following is the most appropriate next step in management?

Diagnostic peritoneal aspiration

Computed tomography of the head without contrast

Immediate exploratory laparotomy

Computed tomography of the abdomen and pelvis

Application of a pelvic binder

Cevabı ve açıklamayı göster

Cevap: Immediate exploratory laparotomy

Cevap

Immediate exploratory laparotomy

The correct next step is immediate exploratory laparotomy. This patient is in severe hemorrhagic shock following blunt trauma. According to Advanced Trauma Life Support (ATLS) protocols, clinical signs of peritonitis—such as a diffusely rigid abdomen and involuntary guarding—in a hemodynamically unstable trauma patient constitute an absolute indication for immediate surgical exploration. Although the FAST examination is technically inadequate (which would algorithmically prompt a diagnostic peritoneal aspiration to evaluate for intraperitoneal blood in an otherwise equivocal abdomen), the unequivocal physical examination findings of an acute abdomen supersede the need for further diagnostic testing. Proceeding directly to the operating room is critical to achieve prompt hemorrhage control and manage a likely hollow viscus or solid organ injury.

Adım Adım Çözüm

Assess the patient's hemodynamic status and primary survey.

The patient is in class IV hemorrhagic shock (BP 74/40 mm Hg, HR 142/min) with a patent airway and intact breathing.

To prioritize life-threatening injuries according to the ATLS ABCDE algorithm.

Evaluate the abdominal physical examination and FAST results.

The FAST exam is inconclusive, but the physical examination reveals a rigid abdomen with involuntary guarding.

To determine the source of hemorrhage and the need for operative intervention.

Determine the next best step based on the clinical findings.

The presence of frank peritonitis (rigidity, guarding) in an unstable patient mandates immediate exploratory laparotomy, bypassing further diagnostic steps like diagnostic peritoneal aspiration.

Peritonitis indicates a ruptured hollow viscus or massive hemoperitoneum requiring urgent surgical control.

Anahtar Kavram

In a hemodynamically unstable trauma patient, the presence of frank peritonitis (e.g., rigid abdomen, involuntary guarding) is an absolute indication for immediate exploratory laparotomy, regardless of ultrasound (FAST) findings.

Tahmini Süre:1m 30s

Soru 254Soru →

Match each clinical presentation of an adrenal mass with the most appropriate specific perioperative or surgical management step.

Soldaki öğeye tıklayın, sonra eşleşen sağdaki öğeye tıklayın

Cevabı ve açıklamayı göster

Cevap

Pheochromocytoma pairs with alpha/beta blockade; Conn syndrome pairs with aldosterone antagonists; Adrenal Cushing syndrome pairs with postoperative glucocorticoids; Adrenocortical carcinoma pairs with open en bloc resection.

Each adrenal pathology requires distinct surgical planning. Pheochromocytoma requires sequential alpha then beta blockade to prevent intraoperative hypertensive crisis. Primary hyperaldosteronism requires potassium repletion and mineralocorticoid receptor blockade. Adrenal Cushing syndrome causes contralateral gland atrophy, necessitating perioperative stress-dose glucocorticoids to prevent acute adrenal insufficiency after tumor removal. Large, suspicious masses (adrenocortical carcinoma) require open en bloc resection to avoid capsular rupture and tumor seeding, which are risks with laparoscopic approaches and percutaneous biopsies.

Adım Adım Çözüm

Analyze the clinical, laboratory, and imaging findings for each adrenal mass presentation to establish the underlying diagnosis.

Identified diagnoses are pheochromocytoma, primary hyperaldosteronism, adrenal Cushing syndrome, and adrenocortical carcinoma.

Each type of functional or malignant adrenal tumor has distinct physiologic consequences that dictate perioperative management.

Determine the specific pathophysiologic risks associated with the surgical removal of each tumor type.

Pheochromocytoma risks hypertensive crisis; Conn syndrome involves potassium wasting and hypertension; Cushing syndrome risks postoperative adrenal crisis due to HPA axis suppression; Adrenocortical carcinoma risks tumor spillage and local invasion.

Surgical and perioperative strategies are tailored to mitigate these life-threatening complications.

Match the diagnosis with the standard-of-care surgical and perioperative intervention.

Correct pairings are made based on surgical guidelines for endocrine pathology.

Ensures adherence to best practices in endocrine surgery and patient safety.

Anahtar Kavram

Perioperative and surgical management of functioning and malignant adrenal tumors

Soru 255Soru →

A 65-year-old man is evaluated in the surgical intensive care unit on postoperative day 5 following a low anterior resection for rectal adenocarcinoma. The nurse calls due to a sudden change in the patient's clinical status. He is now lethargic and confused. His temperature is 39.4°C (102.9°F), blood pressure is 78/40 mmHg, pulse is 135/min, and respirations are 28/min. Pulse oximetry shows 88% on room air. Abdominal examination reveals diffuse rigidity, severe rebound tenderness, and involuntary guarding. Arrange the following management steps in the correct chronological sequence for this acute postoperative complication.

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence prioritizes the ABCs of resuscitation (Airway and Oxygen), followed immediately by circulatory support (Fluid bolus). Once stabilized, diagnostic cultures must be drawn prior to administering broad-spectrum antibiotics. Finally, the unstable patient with generalized peritonitis must undergo emergent surgical source control.

The management of an acute, life-threatening postoperative complication like an anastomotic leak with septic shock requires a strict adherence to resuscitation and sepsis algorithms. First, the airway and breathing must be secured with supplemental oxygen. Second, circulation is supported via aggressive crystalloid resuscitation. Third, source identification begins by drawing blood cultures. Fourth, broad-spectrum antibiotics are given to treat the systemic infection. Finally, because the patient exhibits generalized peritonitis and hemodynamic instability, emergent operative source control (exploratory laparotomy) is the definitive step, deliberately bypassing any radiographic imaging delays.

Adım Adım Çözüm

Assess airway patency and administer high-flow supplemental oxygen.

The patient's severe hypoxia and altered mental status are addressed.

Airway and Breathing take absolute precedence in any acute resuscitation scenario.

Establish large-bore intravenous access and administer a rapid crystalloid bolus.

Intravascular volume is expanded to counteract profound sepsis-induced vasodilation.

Circulatory support is the immediate next priority for a patient in septic shock.

Obtain peripheral blood and relevant fluid cultures.

Diagnostic samples are secured before they can be altered by medications.

Cultures must precede antimicrobial administration to ensure accurate pathogen identification and targeted therapy.

Administer broad-spectrum intravenous antibiotics.

Empiric treatment for suspected intra-abdominal sepsis is initiated.

Early antibiotic administration is critical for survival in septic shock and should follow culture acquisition.

Transport the patient to the operating room for emergent exploratory laparotomy.

Definitive source control of the likely anastomotic leak is achieved.

Hemodynamically unstable patients with peritonitis require immediate surgery without delaying for radiographic imaging.

Anahtar Kavram

Algorithm for postoperative septic shock and acute surgical abdomen management.

Soru 256Soru →

A 15-year-old boy is brought to the emergency department by his parents due to severe, sudden-onset right scrotal pain that woke him from sleep 2 hours ago. He reports nausea and has vomited twice. He has no history of trauma, dysuria, or urethral discharge. His temperature is 37.1°C (98.8°F), heart rate is 105/min, and blood pressure is 125/80 mmHg. Physical examination reveals a swollen, exquisitely tender, and high-riding right testicle with a transverse lie. The right cremasteric reflex is absent, while the left is intact. Scrotal elevation does not relieve the pain. Which of the following is the most appropriate next step in the management of this patient?

Immediate surgical exploration

Color Doppler ultrasound of the scrotum

Intramuscular ceftriaxone and oral doxycycline

Computed tomography of the abdomen and pelvis

Urinalysis and urine culture

Cevabı ve açıklamayı göster

Cevap: Immediate surgical exploration

Cevap

The most appropriate next step is immediate surgical exploration.

The correct answer is immediate surgical exploration. This patient presents with the classic triad of testicular torsion: sudden onset of severe scrotal pain, a high-riding transversely oriented testicle, and an absent cremasteric reflex. Testicular torsion is a urologic emergency caused by twisting of the spermatic cord, leading to venous congestion, arterial compromise, and eventual testicular infarction. The window for testicular salvage is extremely narrow, typically 4 to 6 hours from symptom onset. Therefore, when the clinical diagnosis is highly suspected based on history and physical examination, the standard of care is immediate urologic consultation and surgical exploration. Bilateral orchiopexy (fixation of the testicles to the scrotal wall) is performed to prevent recurrence. Ordering any diagnostic imaging, including a Doppler ultrasound, is contraindicated in this scenario as it will delay definitive care and increase the likelihood of orchiectomy.

Adım Adım Çözüm

Analyze the patient's demographics and history of present illness.

A 15-year-old adolescent boy presents with acute, severe, sudden-onset scrotal pain that woke him from sleep, accompanied by nausea and vomiting.

Sudden onset of severe scrotal pain in an adolescent is highly suspicious for a vascular event like testicular torsion.

Evaluate the physical examination findings.

The physical exam shows a high-riding, transversely oriented testicle with an absent cremasteric reflex on the affected side.

An absent cremasteric reflex is the most sensitive physical finding for testicular torsion. A high-riding, transverse lie indicates a 'bell clapper' deformity predisposing to torsion.

Determine the optimal management strategy based on clinical suspicion.

The clinical diagnosis of testicular torsion is highly likely, necessitating definitive treatment.

Testicular torsion is a surgical emergency. The testicle can suffer irreversible ischemic damage within 4 to 6 hours of symptom onset. Therefore, when clinical suspicion is high, immediate surgical exploration and bilateral orchiopexy are required without delaying for confirmatory imaging.

Anahtar Kavram

Management of high-suspicion acute testicular torsion

Soru 257Soru →

A 16-year-old boy is brought to the emergency department by his parents due to the sudden onset of severe right scrotal pain that awoke him from sleep 2 hours ago. He has had one episode of vomiting since the pain started. His temperature is 37.1°C (98.8°F), blood pressure is 120/78 mmHg, and pulse is 98/min. Physical examination reveals a swollen, exquisitely tender, and high-riding right testicle with a transverse lie. The right cremasteric reflex is absent. Which of the following is the most appropriate next step in management?

Immediate surgical exploration

Scrotal Doppler ultrasonography

Intramuscular ceftriaxone and oral doxycycline

Scrotal elevation and ice packs

Urinalysis and urine culture

Cevabı ve açıklamayı göster

Cevap: Immediate surgical exploration

Cevap

Immediate surgical exploration

The patient's presentation of sudden-onset, severe scrotal pain during sleep, accompanied by nausea or vomiting, an absent cremasteric reflex, and a high-riding testicle, is highly characteristic of testicular torsion. Testicular torsion is a urologic emergency caused by the twisting of the spermatic cord, which compromises the blood supply to the testicle. Because testicular viability decreases significantly after 6 hours of ischemia, a patient with a classic clinical picture should be taken directly to the operating room for immediate surgical exploration and bilateral orchiopexy. Delaying surgery for imaging is contraindicated when the diagnosis is highly likely.

Adım Adım Çözüm

Identify the primary clinical presentation

Sudden onset of severe scrotal pain, high-riding testicle with transverse lie, and absent cremasteric reflex.

These are the hallmark signs of testicular torsion, an acute ischemic condition.

Determine the necessity of diagnostic imaging

Imaging is not needed when the clinical suspicion for testicular torsion is high.

Time is critical; testicular salvage rates drop significantly after 6 hours of ischemia.

Select the appropriate intervention

Immediate surgical exploration.

Surgery allows for definitive diagnosis, manual detorsion, and bilateral orchiopexy to prevent recurrence.

Anahtar Kavram

Testicular torsion requires emergent surgical exploration without delay for imaging when the clinical presentation is classic (sudden pain, absent cremasteric reflex, high-riding testis).

Soru 258Soru →

A 42-year-old woman comes to the clinic for evaluation of a newly noticed lump in her anterior neck. She reports no pain, hoarseness, dysphagia, or recent changes in her weight. Physical examination reveals a non-tender, 2.5-cm, mobile nodule in the right lobe of the thyroid gland. A neck ultrasound confirms a 2.5-cm solid, hypoechoic nodule in the right thyroid lobe with regular margins. Laboratory studies show a serum thyroid-stimulating hormone (TSH) level of 0.1 mU/L (normal: 0.4-4.0 mU/L). Which of the following is the most appropriate next step in management?

Radionuclide thyroid scan

Fine-needle aspiration biopsy

Initiation of levothyroxine therapy

CT scan of the neck with contrast

Right thyroid lobectomy

Cevabı ve açıklamayı göster

Cevap: Radionuclide thyroid scan

Cevap

Radionuclide thyroid scan

According to the standard diagnostic algorithm for thyroid nodules, the initial evaluation requires a serum TSH level and a thyroid ultrasound. If the TSH is subnormal (suppressed), a radionuclide thyroid scan (e.g., using Iodine-123 or Technetium-99m) is indicated to assess the functional status of the nodule. Hyperfunctioning ('hot') nodules are rarely malignant and typically require evaluation and treatment for hyperthyroidism rather than biopsy. Non-functioning ('cold') nodules have a higher risk of malignancy and generally require a subsequent fine-needle aspiration biopsy.

Adım Adım Çözüm

Identify the primary clinical problem and initial findings.

The patient has a palpable 2.5-cm solid thyroid nodule confirmed by ultrasound.

Establishing the baseline clinical scenario is required before interpreting the diagnostic algorithm.

Evaluate the initial laboratory results.

The serum TSH level is 0.1 mU/L, which is suppressed (below the normal range).

The TSH value dictates the diagnostic pathway for evaluating a thyroid nodule.

Determine the next indicated step based on the TSH level.

A radionuclide thyroid scan is chosen.

When TSH is subnormal, a radionuclide scan is required to determine if the nodule is hyperfunctioning (hot) or non-functioning (cold), as hot nodules are rarely malignant.

Anahtar Kavram

Evaluation of a thyroid nodule with a suppressed TSH level

Soru 259Soru →

A 68-year-old woman is evaluated in the emergency department for a 2-day history of progressive, crampy abdominal pain, nausea, and bilious vomiting. She has not passed flatus or stool for the past 24 hours. Her medical history is significant for a total abdominal hysterectomy performed 10 years ago for benign disease. Her temperature is 38.1°C (100.6°F), pulse is 112/min, blood pressure is 105/65 mm Hg, and respirations are 20/min. Physical examination reveals a markedly distended and tympanitic abdomen. Bowel sounds are high-pitched and tinkling. There is focal tenderness to deep palpation in the right lower quadrant with guarding, but no generalized rigidity is present. Laboratory studies show a leukocyte count of 16,500/mm³ (80% segmented neutrophils, 8% bands) and a serum lactate level of 2.8 mmol/L. A CT scan of the abdomen and pelvis with intravenous contrast demonstrates dilated loops of small bowel up to 4.5 cm in diameter with a discrete transition point in the distal ileum. The bowel wall at the transition point is mildly thickened and shows notably decreased contrast enhancement compared to adjacent small bowel loops. A small amount of free fluid is noted in the pelvis; there is no pneumoperitoneum. Which of the following is the most appropriate next step in management?

Immediate exploratory laparotomy

Nasogastric tube decompression and intravenous fluids

Administration of water-soluble contrast medium

Intravenous broad-spectrum antibiotics and serial abdominal examinations

Diagnostic laparoscopy

Cevabı ve açıklamayı göster

Cevap: Immediate exploratory laparotomy

Cevap

Immediate exploratory laparotomy

The most appropriate next step is immediate exploratory laparotomy because this patient presents with a small bowel obstruction (SBO) complicated by signs of bowel ischemia (strangulation). While uncomplicated SBO is typically managed non-operatively with nasogastric decompression and intravenous fluids for the first 24-48 hours, this patient exhibits multiple 'red flags' indicating vascular compromise. These include systemic signs (low-grade fever, tachycardia, marked leukocytosis with a left shift, elevated serum lactate) and localized signs (focal right lower quadrant guarding). Most importantly, the CT scan reveals decreased contrast enhancement of the bowel wall at the transition point, which is a highly specific radiographic sign of ischemia. Immediate open surgical intervention is required to resect the compromised bowel segment and prevent imminent perforation and overwhelming sepsis.

Adım Adım Çözüm

Analyze the patient's presentation and diagnostic findings to establish the primary diagnosis.

The history of prior abdominal surgery, bilious vomiting, obstipation, distended tympanitic abdomen, and CT findings of dilated loops with a transition point confirm an adhesive small bowel obstruction (SBO).

Establishing the baseline pathology is necessary before determining the severity and required intervention.

Evaluate for 'red flag' clinical and radiographic signs indicating complicated SBO.

The patient exhibits fever (38.1°C), tachycardia (112/min), focal tenderness with guarding, marked leukocytosis with a left shift (16,500/mm³, 8% bands), elevated lactate (2.8 mmol/L), and decreased bowel wall enhancement on CT.

Differentiating between simple and complicated (strangulated) SBO dictates whether management should be conservative or surgical.

Determine the most appropriate intervention based on the severity of the obstruction.

The presence of ischemia/strangulation mandates bypassing conservative measures and proceeding directly to the operating room for definitive surgical management.

Ischemic bowel will rapidly progress to transmural necrosis and perforation if blood flow is not surgically restored or the non-viable segment is not resected.

Anahtar Kavram

Patients with a small bowel obstruction who exhibit clinical (fever, tachycardia, leukocytosis, focal tenderness, lactic acidosis) or radiographic (decreased wall enhancement) signs of ischemia require immediate surgical exploration.

Soru 260Soru →

A 22-year-old male is brought to the emergency department via ambulance after being struck on the right side of the head with a baseball bat. Paramedics report that he was briefly unconscious at the scene but awoke and conversed normally during the initial transport. Upon arrival at the emergency department 30 minutes later, he is unresponsive. His Glasgow Coma Scale score is 7 (Eye opening: 2, Verbal response: 2, Motor response: 3). Vital signs are temperature 37.1°C (98.8°F), blood pressure 180/105 mm Hg, heart rate 48/min, and respiratory rate 8/min. Neurologic examination reveals a right pupil that is 7 mm and unreactive to light, and a left pupil that is 3 mm and reactive. A left-sided hemiparesis is noted. Which of the following is the most appropriate next step in the management of this patient?

Admit to the intensive care unit for continuous observation and frequent neurologic checks

Transport to the radiology suite for an emergent non-contrast CT scan of the head

Endotracheal intubation and mechanical ventilation

Await the arrival of the next-of-kin to obtain informed consent for intervention

Administer intravenous sodium bicarbonate

Cevabı ve açıklamayı göster

Cevap: Endotracheal intubation and mechanical ventilation

Cevap

Endotracheal intubation and mechanical ventilation

The patient presents with classic signs of an acute epidural hematoma complicated by uncal herniation. This is evidenced by the lucid interval followed by rapid neurologic decline, Cushing triad (hypertension, bradycardia, irregular and depressed respirations), an ipsilateral dilated and fixed pupil (due to compression of the right oculomotor nerve), and contralateral hemiparesis (due to compression of the right cerebral peduncle). In any trauma patient, the Advanced Trauma Life Support (ATLS) protocol dictates prioritizing the airway (ABCs). A Glasgow Coma Scale (GCS) score of 8 or less is an absolute indication for endotracheal intubation to protect the airway and ensure adequate oxygenation and ventilation. Once the airway is secured, the patient should rapidly undergo a non-contrast head CT and emergent surgical decompression.

Adım Adım Çözüm

Assess the patient's level of consciousness and vital signs.

GCS is 7, with bradycardia, severe hypertension, and bradypnea (Cushing triad).

To identify life-threatening compromises in airway, breathing, or circulation.

Evaluate pupillary and motor findings.

Right unreactive pupil and left hemiparesis.

To localize the neurologic lesion, indicating right-sided uncal herniation.

Determine the most immediate life-saving intervention.

Secure the airway via endotracheal intubation.

A GCS < 8 and depressed respirations necessitate definitive airway protection before diagnostic imaging or surgical evacuation.

Anahtar Kavram

Airway management in acute traumatic brain injury with signs of uncal herniation and a Glasgow Coma Scale score less than 8.

Tahmini Süre:1m 30s

ÖncekiSayfa 13 / 68Sonraki

Surgery

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