Physiological Integrity

1960 soru

Soru 361Soru →

A nurse is caring for a client who is 24 hours postoperative following an open bowel resection. The client has an intravenous line and an indwelling urinary catheter. Which change in the client's assessment provides the earliest physiological indication of a developing shock state?

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Cevap: A narrowing of the pulse pressure with a gradual increase in the resting heart rate

Cevap

A narrowing of the pulse pressure with a gradual increase in the resting heart rate
In the early (compensatory) stage of shock, the body's physiological adaptation involves sympathetic nervous system activation. This leads to an increased heart rate to maintain cardiac output and peripheral vasoconstriction to maintain blood pressure. The vasoconstriction typically raises the diastolic blood pressure while the systolic remains relatively stable, resulting in a narrowed pulse pressure. These subtle hemodynamic changes occur before a significant drop in systolic blood pressure.

Adım Adım Çözüm

1
Analyze the clinical scenario and the specific requirement of the question.
The nurse must identify the earliest sign of physiological shock in a postoperative client.
Differentiating between early compensation, late decompensation, and expected postoperative findings is critical for timely, life-saving intervention.
2
Evaluate each clinical finding against the stages of shock and expected postoperative parameters.
Mild tachycardia and narrowed pulse pressure reflect early sympathetic compensation. Hypotension is a late sign. The ABG provided is normal. The incisional pain is an expected finding.
Understanding physiological adaptation helps the nurse recognize when compensatory mechanisms are first activated to maintain perfusion.

Anahtar Kavram

Early recognition of compensatory shock mechanisms
Soru 362Soru →

A client recovering from an open femoral fracture reduction abruptly develops profound dyspnea, diaphoresis, and reports a feeling of impending doom. Current vital signs are: blood pressure 85/6085/60 mmHg, heart rate 132132 bpm, respiratory rate 3434 breaths/min, and oxygen saturation 86%86\% on room air. Arterial blood gas (ABG) analysis reveals: pH 7.527.52, PaCO 2_2 2828 mmHg, PaO 2_2 5454 mmHg, and HCO 3−_3^- 2424 mEq/L. The nurse notes a rapidly narrowing pulse pressure. Which of the following is the highest priority nursing action?

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Cevap: Apply a non-rebreather mask with oxygen at 1515 L/min and activate the rapid response team.

Cevap

Apply a non-rebreather mask with oxygen at 15 L/min and activate the rapid response team.
The client is exhibiting classic signs of a massive pulmonary embolism leading to obstructive shock. The profound hypoxemia (PaO2 5454 mmHg) is the primary driver of the hyperventilation (resulting in respiratory alkalosis). Supplying high-flow oxygen addresses the most critical immediate deficit, and the rapid response team is required for advanced resuscitation, which may include intravenous fluid boluses to maintain right ventricular preload and thrombolytic therapy.

Adım Adım Çözüm

1
Analyze the clinical presentation.
The client is a post-operative orthopedic patient presenting with sudden dyspnea, impending doom, hypoxia, and shock indicators (narrowing pulse pressure, hypotension).
This specific triad of symptoms in a high-risk patient strongly suggests a massive pulmonary embolism (PE) leading to obstructive shock.
2
Interpret the arterial blood gas (ABG) results.
The pH of 7.52 and PaCO2 of 28 mmHg indicate respiratory alkalosis, driven by hyperventilation. The PaO2 of 54 mmHg indicates severe, life-threatening hypoxemia.
Understanding that the alkalosis is secondary to the hypoxic drive prevents the implementation of deadly interventions, such as CO2 rebreathing.
3
Evaluate the hemodynamic status.
The blood pressure of 85/60 mmHg and heart rate of 132 bpm represent an acute state of obstructive shock caused by the embolus blocking pulmonary blood flow.
Recognizing the shock state alters standard respiratory positioning and medication protocols, prioritizing preload maintenance and cardiac output.
4
Determine the highest priority action based on the ABCs.
Maximizing oxygen delivery with a non-rebreather mask and calling for emergency assistance is selected as the paramount first step.
Airway and Breathing take absolute precedence; the client requires immediate high-flow oxygen and rapid medical intervention (e.g., fluid resuscitation, thrombolytics) to survive.

Anahtar Kavram

Recognition and emergency management of obstructive shock and severe hypoxemia secondary to a massive pulmonary embolism.
Soru 363Soru →

A nurse is preparing a client with cirrhosis for a bedside paracentesis to relieve severe ascites. Which nursing actions are essential to reduce the client's risk for procedural and post-procedural complications? Select all that apply.

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Cevap: Instruct the client to void completely immediately before the provider begins the procedure.; Measure the client's baseline weight, abdominal girth, and vital signs before fluid removal.; Monitor the client closely for early indicators of hypovolemic shock, such as tachycardia and a narrowing pulse pressure.

Cevap

The correct actions include instructing the client to void, obtaining baseline measurements, and monitoring for signs of hypovolemic shock.
The correct actions directly minimize the risk of iatrogenic injury (such as bladder puncture), establish necessary baselines for post-procedure comparison, and ensure the early detection of potentially fatal complications like hypovolemic shock following large-volume fluid shifts.

Adım Adım Çözüm

1
Evaluate the risk of organ injury during a paracentesis.
The bladder is at high risk of puncture if it is distended.
Instructing the client to void completely reduces bladder volume and moves the organ safely away from the abdominal insertion site.
2
Determine essential pre-procedure baseline data.
Weight, abdominal girth, and vital signs must be recorded.
These metrics provide a precise baseline to accurately measure the volume of fluid lost and to detect adverse systemic reactions.
3
Analyze post-procedure hemodynamic risks.
Large volume fluid removal can cause massive fluid shifts from the intravascular space to the interstitial space.
Monitoring for early signs of shock, such as tachycardia and narrowed pulse pressure, ensures the prompt initiation of life-saving interventions like administering IV albumin or fluids.

Anahtar Kavram

Paracentesis Safety and Risk Reduction
Soru 364Soru →

A hospitalized client with severe anemia is receiving a transfusion of packed red blood cells. Fifteen minutes after the procedure begins, the client reports acute lower back pain, sudden chills, and a sensation of chest tightness. The telemetry monitor indicates a rapid onset of sinus tachycardia. The nurse immediately halts the transfusion. What is the most critical subsequent action for the nurse to execute?

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Cevap: Detach the transfusion tubing from the catheter hub and connect a newly primed 0.9% sodium chloride infusion set.

Cevap

Detach the transfusion tubing from the catheter hub and connect a newly primed 0.9% sodium chloride infusion set.
When a client experiences an acute hemolytic reaction, the absolute priority after stopping the transfusion is to maintain vascular access for emergency medications and fluid volume replacement to prevent acute kidney injury and cardiovascular collapse. This must be done by completely disconnecting the blood tubing at the hub and attaching a new, sterile IV line primed with 0.9% normal saline. This prevents the blood remaining in the old tubing from being inadvertently flushed into the client.

Adım Adım Çözüm

1
Analyze the client's clinical presentation.
The symptoms (lower back pain, chills, chest tightness, tachycardia) occurring 15 minutes into a transfusion indicate an acute hemolytic reaction.
Early recognition of a life-threatening transfusion reaction is essential to halt further administration of the incompatible antigen.
2
Identify the immediate priority after stopping the infusion.
The nurse must maintain vascular access to treat potential shock and prevent acute kidney injury, but must avoid administering any more of the reactive blood.
During an acute hemolytic reaction, the kidneys are at high risk of failure due to hemoglobinuria. Vigorous intravenous hydration is required.
3
Select the safest method to maintain vascular access.
The nurse must disconnect the blood tubing entirely and attach new, sterile tubing primed with 0.9% normal saline.
Using the existing tubing would flush the remaining blood product into the client, exacerbating the hemolytic reaction.

Anahtar Kavram

Blood Transfusion Reactions and IV Administration Safety
Soru 365Soru →

A charge nurse is observing a newly licensed nurse care for a 24-year-old client admitted with diabetic ketoacidosis (DKA). The client is lethargic and exhibiting deep, rapid respirations at 32 breaths/minute. Arterial blood gas (ABG) results indicate a pH of 7.23, PaCO2PaCO_2 of 26 mm Hg, and HCO3−HCO_3^- of 14 mEq/L. Which action by the newly licensed nurse requires immediate intervention by the charge nurse?

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Cevap: Coaching the client to breathe into a paper bag to decrease the respiratory rate.

Cevap

Coaching the client to breathe into a paper bag to decrease the respiratory rate.
The newly licensed nurse is attempting to treat the client's rapid breathing as if it were a panic attack (hyperventilation syndrome). However, in diabetic ketoacidosis, deep and rapid breathing (Kussmaul respirations) is a vital compensatory mechanism. The lungs are exhaling large amounts of CO2CO_2 (which acts as an acid in the blood) to help bring the acidic pH back toward normal. Having the client breathe into a paper bag forces them to rebreathe CO2CO_2, defeating the compensatory mechanism and causing the blood pH to drop further, which can lead to cardiovascular collapse and death. The charge nurse must intervene immediately.

Adım Adım Çözüm

1
Analyze the client's clinical presentation and Arterial Blood Gas (ABG) results.
The low pH of 7.23 and low HCO3−HCO_3^- of 14 mEq/L indicate metabolic acidosis. The PaCO2PaCO_2 of 26 mm Hg is lower than the normal range, indicating a respiratory compensation effort.
Identifying the primary acid-base imbalance is necessary to determine the physiological state and the appropriateness of clinical interventions.
2
Evaluate the client's respiratory pattern in relation to the ABG values.
The deep, rapid breathing at 32 breaths/minute represents Kussmaul respirations.
The lungs are naturally attempting to compensate for the severe metabolic acidosis by blowing off excess carbon dioxide (an acid) to raise the blood pH.
3
Assess each nursing action to determine if it reduces risk or causes harm.
Using a paper bag would cause the client to rebreathe carbon dioxide, which disrupts the compensatory mechanism and worsens the acidosis. The other actions (administering fluids, insulin, and verifying urine before potassium) are standard, correct interventions for DKA.
The charge nurse must intervene only when a delegated or observed action places the client at significant risk for physiological deterioration.

Anahtar Kavram

Compensatory mechanisms in metabolic acidosis (Kussmaul respirations)
Soru 366Soru →

A nurse is preparing to administer intravenous (IV) potassium chloride (KCl) 40 mEq40\text{ mEq} in 250 mL250\text{ mL} of 0.9%0.9\% sodium chloride to a client with a serum potassium level of 2.6 mEq/L2.6\text{ mEq/L}. The client is currently receiving a continuous IV infusion of pantoprazole through a single peripheral IV line. Which of the following actions by the nurse are appropriate? Select all that apply.

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Cevap: Verify that the client's urine output has been at least 30 mL/hr30\text{ mL/hr} before initiating the infusion.; Assess the peripheral IV insertion site for signs of phlebitis or infiltration hourly during the infusion.; Check a drug reference guide to confirm the compatibility of potassium chloride with pantoprazole at the Y-site.

Cevap

The appropriate actions are verifying adequate urine output, assessing the IV site hourly for infiltration, and checking Y-site compatibility with the concurrent pantoprazole infusion.
Safe administration of intravenous potassium chloride requires confirming adequate renal function (urine output >30 mL/hr> 30\text{ mL/hr}) to prevent accumulation, meticulously assessing the peripheral IV site due to the drug's vesicant properties, and verifying Y-site compatibility with any continuous infusions to prevent dangerous crystallization in the tubing.

Adım Adım Çözüm

1
Evaluate the prescribed medication (potassium chloride) for strict safety parameters and administration routes.
Identify that potassium chloride must be diluted, infused slowly via a pump (max 10 mEq/hr10\text{ mEq/hr} peripherally), and never given IV push.
Rapid administration of potassium causes fatal cardiac dysrhythmias.
2
Assess the client's physiological readiness to receive the medication.
Determine that urine output must be at least 30 mL/hr30\text{ mL/hr}.
Potassium is primarily excreted by the kidneys; oliguria or anuria can lead to toxic accumulation.
3
Analyze the method of delivery and concurrently infusing medications.
Identify that Y-site compatibility with pantoprazole must be verified, and the peripheral site must be monitored hourly.
Mixing incompatible drugs causes precipitation, and potassium is a vesicant that can cause severe tissue necrosis if it infiltrates.

Anahtar Kavram

High-alert parenteral medication safety principles, specifically focusing on intravenous potassium administration, compatibility, and organ function assessment.
Soru 367Soru →

A nurse is evaluating a client who underwent a percutaneous coronary intervention (PCI) via the right femoral artery 2 hours ago. Which of the following assessment findings require immediate intervention? Select all that apply.

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Cevap: The client reports a new, sudden onset of right-sided flank pain.; The client's heart rate has increased steadily from 78 to 112 beats per minute over the last hour.; The client is resting in bed with the head of the bed elevated to a 60-degree angle.

Cevap

The findings requiring immediate intervention include the new onset of right-sided flank pain, a steadily increasing heart rate, and the head of the bed being elevated to a 60-degree angle.
The correct options identify significant risks and complications associated with femoral artery access. Sudden flank pain is a classic indicator of retroperitoneal hemorrhage. A steadily increasing heart rate is an early compensatory sign of hypovolemic shock. Elevating the head of the bed to 60 degrees is a contraindicated position because severe hip flexion can dislodge the clot at the femoral insertion site, leading to acute bleeding.

Adım Adım Çözüm

1
Analyze the procedure and approach.
The client underwent a percutaneous coronary intervention via the right femoral artery.
Identifying the procedure highlights the specific risks: femoral access carries a high risk of bleeding, hematoma, retroperitoneal hemorrhage, and arterial occlusion.
2
Evaluate each option for signs of complications or procedural risks.
Flank pain indicates internal bleeding. Tachycardia indicates early shock. A bed elevated to 60 degrees creates hip flexion that risks dislodging the clot.
Differentiating between expected post-procedure findings and actual physiological decompensation is essential for risk reduction.
3
Differentiate abnormal findings from normal post-procedure data.
Slightly lower blood pressure, normal ABG values, and palpable pedal pulses are normal, expected findings that do not require intervention.
Recognizing normal parameters prevents unnecessary interventions and improper prioritization.

Anahtar Kavram

Post-Cardiac Catheterization Complication Monitoring
Soru 368Soru →

An emergency department nurse is continuously monitoring a client who sustained severe blunt abdominal trauma. The client's baseline vital signs upon arrival were blood pressure 124/76 mm Hg, heart rate 82/min, and respiratory rate 16/min. Which of the following subsequent assessment findings should the nurse identify as the earliest clinical indicator of hemorrhagic shock?

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Cevap: Blood pressure of 118/88 mm Hg and a heart rate of 98/min

Cevap

Blood pressure of 118/88 mm Hg and a heart rate of 98/min
In the early (compensatory) stage of hemorrhagic shock, the sympathetic nervous system is activated in response to decreased circulating volume. This triggers the release of catecholamines, causing peripheral vasoconstriction and an increased heart rate. The vasoconstriction disproportionately elevates the diastolic blood pressure, leading to a narrowed pulse pressure (the difference between systolic and diastolic pressure). Identifying this subtle trend (e.g., pulse pressure narrowing from 48 to 30 mm Hg) allows the nurse to intervene before the client decompensates.

Adım Adım Çözüm

1
Analyze the baseline vital signs provided in the scenario.
Baseline: BP 124/76 (Pulse Pressure = 48 mm Hg), HR 82/min. The client has abdominal trauma, placing them at high risk for internal hemorrhage.
Establishing a baseline is essential to identify subtle trending changes that indicate physiological decompensation.
2
Recall the pathophysiology of the early (compensatory) stage of shock.
The body activates the sympathetic nervous system, releasing epinephrine and norepinephrine. This causes vasoconstriction and an increased heart rate to maintain perfusion to vital organs.
Understanding compensatory mechanisms helps differentiate early signs from late signs of shock.
3
Evaluate the clinical manifestations of sympathetic activation on vital signs.
Vasoconstriction primarily increases diastolic blood pressure, while systolic remains relatively stable, resulting in a narrowed pulse pressure. Mild tachycardia also occurs concurrently.
A narrowing pulse pressure and increasing heart rate are the most reliable early indicators of volume loss before frank hypotension occurs.
4
Compare the options against the timeline of shock progression.
Hypotension, metabolic acidosis, and mottled skin are all signs of progressive or irreversible shock where compensation has already failed.
The question specifically asks for the earliest clinical indicator, making the narrowed pulse pressure the correct choice.

Anahtar Kavram

Early recognition of compensatory shock through narrowed pulse pressure and tachycardia
Soru 369Soru →

A nurse is caring for an older adult client who recently experienced a cerebrovascular accident (stroke), resulting in right-sided hemiparesis and dysphagia. Which of the following basic care and comfort interventions should the nurse implement? Select all that apply.

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Cevap: Position the client in a high-Fowler's position during and for at least 30 minutes after meals.; Place food directly onto the unaffected left side of the client's mouth.; Check the affected side of the client's mouth for pocketed food after eating.

Cevap

The correct interventions are placing the client in a high-Fowler's position, placing food on the unaffected left side, and checking the affected side for pocketed food.
The appropriate interventions directly address the client's right-sided weakness and swallowing difficulties. Sitting up at 90 degrees utilizes gravity for safe swallowing. Placing food on the unaffected (left) side uses the functional muscles for chewing. Checking the affected side for pocketed food prevents silent or delayed aspiration of hidden food particles.

Adım Adım Çözüm

1
Analyze the client's condition and physiological deficits.
The client has right-sided hemiparesis (weakness/paralysis) and dysphagia (difficulty swallowing) following a stroke.
Understanding the deficits is crucial for identifying interventions that promote comfort, nutrition, and safety.
2
Evaluate the nutritional and feeding safety interventions.
High-Fowler's positioning, placing food on the strong side, and checking for pocketed food all safely manage the dysphagia and hemiparesis.
These actions utilize gravity, compensate for weakness, and prevent aspiration pneumonia, aligning with best practices for basic care.
3
Evaluate the distractors related to positioning and aging.
Tilting the head back, assuming coughing is normal, and resting on the paralyzed side are identified as unsafe practices.
These distractors represent common misconceptions regarding airway protection, geriatric physiology, and skin integrity.

Anahtar Kavram

Basic care, comfort, and safety interventions for clients with hemiparesis and dysphagia include aspiration precautions (high-Fowler's, chin-tuck, checking for pocketing) and pressure injury prevention.
Soru 370Soru →

A multidisciplinary team is preparing to remove a pleural chest tube from a client whose lung has fully re-expanded. As the nurse assisting with the procedure, arrange the following actions in the correct chronological sequence to minimize the risk of complications. All options must be used.

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Cevap

The correct chronological sequence is to premedicate the client, instruct them to perform the Valsalva maneuver during removal, apply an occlusive dressing immediately, perform a clinical respiratory assessment, and finally obtain a verifying radiograph.
The primary goal during chest tube removal is preventing air from re-entering the pleural space while minimizing client discomfort. Analgesia is administered first to allow the medication to take effect. During the actual removal, the Valsalva maneuver (bearing down) ensures positive intrathoracic pressure, pushing air outward rather than pulling it in. The moment the tube exits, an occlusive petroleum dressing is applied to seal the tract. Only after the insertion site is physically secured does the nurse assess clinical respiratory status, which is then followed by a radiograph for definitive confirmation of lung expansion.

Adım Adım Çözüm

1
Administer analgesia.
Client pain is proactively managed prior to the procedure.
Promotes comfort and compliance during an otherwise painful extraction.
2
Instruct the Valsalva maneuver.
Intrathoracic pressure increases.
Prevents atmospheric air from being drawn into the pleural cavity as the tube exits the chest wall.
3
Apply the occlusive dressing.
The insertion stoma is hermetically sealed.
Maintains negative intrathoracic pressure and guards against a secondary pneumothorax.
4
Auscultate lung sounds.
Immediate clinical status is verified.
Rapidly identifies any acute physiological decompensation, respiratory distress, or absent breath sounds immediately post-removal.
5
Facilitate a chest radiograph.
Lung expansion is objectively confirmed.
Radiographic imaging serves as the definitive diagnostic proof to rule out a new pneumothorax or hemothorax.

Anahtar Kavram

Safety Protocols for Chest Tube Removal
Soru 371Soru →

An adult client admitted with severe diabetic ketoacidosis (DKA) is prescribed a continuous intravenous (IV) infusion of regular insulin. When initiating and managing this high-alert parenteral therapy, which actions should the nurse include in the plan of care? (Select all that apply.)

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Cevap: Prime the intravenous tubing with 50 mL50\text{ mL} of the insulin solution and discard the fluid before connecting the line to the client.; Anticipate adding an intravenous fluid containing 5% dextrose once the client's blood glucose level decreases to 250 mg/dL250\text{ mg/dL}.; Monitor the client frequently for the development of new-onset muscle weakness and cardiac dysrhythmias.

Cevap

The correct actions are priming the tubing with 50 mL of the insulin solution, adding a dextrose-containing IV fluid when blood glucose reaches 250 mg/dL, and monitoring for signs of hypokalemia.
Safe administration of continuous intravenous insulin requires addressing the drug's tendency to bind to PVC tubing by wasting a priming volume. Clinically, the nurse must anticipate the profound intracellular shift of potassium caused by insulin, necessitating vigilant monitoring for hypokalemia (dysrhythmias, muscle weakness). Furthermore, DKA protocols mandate the addition of 5% dextrose to IV fluids when blood glucose reaches 250 mg/dL to prevent hypoglycemia while allowing the insulin drip to continue until the acidotic state is fully resolved.

Adım Adım Çözüm

1
Analyze the pharmacological properties of intravenous regular insulin in the context of IV administration.
Regular insulin adsorbs to PVC plastic. To ensure the client receives the correct dose, the IV tubing must be primed with insulin solution (typically 20-50 mL) to saturate binding sites before the tubing is connected to the client.
Failure to prime with the insulin solution results in the client receiving a lower-than-prescribed dose initially.
2
Determine the physiological effects of continuous IV insulin on serum electrolytes.
Insulin promotes the intracellular shift of potassium, lowering serum potassium levels. The nurse must monitor for hypokalemia, which presents with muscle weakness and cardiac dysrhythmias.
Hypokalemia is a life-threatening complication of DKA treatment.
3
Evaluate the protocol for blood glucose management during DKA resolution.
When blood glucose drops to approximately 250 mg/dL, the primary goal shifts from rapidly lowering glucose to clearing ketones and closing the anion gap. Dextrose must be added to the IV fluids.
Adding dextrose allows the continuous insulin infusion to remain running without causing severe hypoglycemia.
4
Identify contraindicated actions related to insulin infusions.
Insulin infusions should never be stopped abruptly without subcutaneous coverage, glargine cannot be given IV or mixed, and gravity drips are unsafe for high-alert medications.
These actions compromise patient safety through rebound acidosis, incompatibility reactions, and inaccurate dosing.

Anahtar Kavram

Pharmacological management of Diabetic Ketoacidosis (DKA) and IV insulin safety
Soru 372Soru →

A nurse is assessing a client who is 4 hours post-operative following an exploratory laparotomy. The nurse is monitoring for complications. Which of the following assessment findings should the nurse identify as early indicators of developing hypovolemic shock? Select all that apply.

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Cevap: New-onset restlessness and mild agitation.; Blood pressure reading of 118/92 mm Hg, compared to a baseline of 130/80 mm Hg.; Urine output totaling 40 mL in the surgical catheter drainage bag over the past 2 hours.

Cevap

The early indicators of developing hypovolemic shock are new-onset restlessness and mild agitation, a narrowing pulse pressure (blood pressure changing from 130/80 to 118/92 mm Hg), and oliguria (urine output of 40 mL over 2 hours).
Early hypovolemic shock is characterized by compensatory mechanisms aimed at maintaining cardiac output and vital organ perfusion. The sympathetic nervous system activates, causing peripheral vasoconstriction (which narrows the pulse pressure) and shunting blood away from non-vital organs like the kidneys, resulting in oliguria. Mild cerebral hypoxia manifests as restlessness and agitation.

Adım Adım Çözüm

1
Analyze the clinical scenario
The client is 4 hours post-exploratory laparotomy and is at high risk for hemorrhage and fluid volume deficit.
Identifying the primary risk factor helps anticipate potential complications.
2
Evaluate vital signs for compensatory mechanisms
The blood pressure shows a narrowed pulse pressure (from 50 mm Hg to 26 mm Hg), which is a classic early sign of compensatory vasoconstriction.
The sympathetic nervous system acts to maintain mean arterial pressure despite volume loss by increasing peripheral vascular resistance.
3
Assess organ perfusion indicators
Restlessness indicates mild cerebral hypoxia, and a urine output of 20 mL/hr indicates decreased renal perfusion.
The brain and kidneys are highly sensitive to decreases in cardiac output, making them excellent early indicators of shock.
4
Differentiate expected findings and other shock states
Bounding pulses and warm skin are incorrect for hypovolemia, and localized pain is an expected post-surgical finding.
Hypovolemia causes weak pulses and cool skin; localized pain does not indicate systemic hemodynamic instability.

Anahtar Kavram

Early Recognition of Hypovolemic Shock
Soru 373Soru →

A nurse in the emergency department evaluates a client who sustained a complete spinal cord injury at the T6 level in a traumatic incident 2 hours ago. During the assessment, the nurse notes the client's abdomen is firm, distended, and dull to percussion. The client's current vital signs are:

Blood pressure: 84/48 mm Hg
Heart rate: 128 bpm
Respiratory rate: 24/min

Based on the clinical presentation, which physiological complication should the nurse identify?

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Cevap: Hypovolemic shock, as indicated by the compensatory tachycardia and abdominal findings.

Cevap

The correct answer is hypovolemic shock, as indicated by the compensatory tachycardia and abdominal findings.
The client's clinical presentation of hypotension combined with significant tachycardia (128 bpm) and a firm, distended abdomen strongly indicates acute blood loss (hypovolemic/hemorrhagic shock). In a T6 spinal cord injury, the sympathetic cardioaccelerator fibers (T1-T4) remain intact, allowing the heart to mount a compensatory tachycardia in response to the decreasing intravascular volume.

Adım Adım Çözüm

1
Analyze the client's vital signs and physical assessment findings.
The client is hypotensive (84/48 mm Hg) and tachycardic (128 bpm) with a firm, distended abdomen that is dull to percussion.
Identifying the specific hemodynamic profile is necessary to differentiate between various types of shock in a trauma patient.
2
Evaluate the findings in the context of a T6 spinal cord injury.
The tachycardia indicates an intact sympathetic cardioaccelerator response (T1-T4) to hypovolemia, while the abdominal findings suggest active intra-abdominal bleeding.
Patients with acute spinal cord injuries are at risk for multiple concurrent complications. Recognizing that neurogenic shock typically causes bradycardia helps rule it out, shifting the focus to a hemorrhagic source.

Anahtar Kavram

Differentiating shock states in spinal cord injury based on hemodynamic profiles
Soru 374Soru →

A nurse is preparing to administer a prescribed oral medication to a client who has a nasogastric (NG) tube connected to low intermittent wall suction. The medication has been appropriately crushed and dissolved in sterile water. Arrange the following nursing actions in the correct chronological order.

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Cevap

The correct sequence is to first pause suction and verify placement, flush for patency, administer the medication, flush to clear the line, and finally clamp the tube to allow for absorption.
Safe administration of enteral medications requires a systematic approach. The nurse must first ensure safety by pausing suction and verifying placement. Once verified, flushing ensures patency, followed by gravity administration of the medication, and a subsequent flush to clear the line. Finally, clamping the tube prevents the medication from being immediately suctioned out, allowing for gastric absorption.

Adım Adım Çözüm

1
Disconnect suction and verify placement.
The suction is paused and the tube is confirmed to be in the stomach.
Ensures the medication will not be aspirated into the lungs.
2
Flush with 30 mL of water.
The tube is cleared of any residual stomach contents.
Confirms tube patency and clears the path for the medication.
3
Administer the medication via gravity.
The dissolved medication enters the stomach.
Gravity administration prevents excessive pressure that could damage the tube.
4
Flush with 15 to 30 mL of water.
Residual medication is cleared from the tube.
Ensures the full dose reaches the stomach and prevents the tube from clogging.
5
Clamp the tube for at least 30 minutes.
The tube remains closed and disconnected from suction.
Allows adequate time for the medication to be absorbed through the gastric mucosa.

Anahtar Kavram

Enteral Medication Administration Principles
Soru 375Soru →

A nurse is assessing a client who is 4 hours postoperative following a partial hepatectomy. Which of the following assessment findings should the nurse identify as early indicators of developing hypovolemic shock? Select all that apply.

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Cevap: New-onset restlessness and mild agitation; A narrowing pulse pressure; Respiratory rate increasing from 14 to 26 breaths per minute

Cevap

The correct early indicators of hypovolemic shock are new-onset restlessness and mild agitation, a narrowing pulse pressure, and an increasing respiratory rate.
In the early, compensatory stage of hypovolemic shock, the body's primary goal is to maintain cardiac output and tissue perfusion. The sympathetic nervous system triggers an increase in heart rate and respiratory rate. Peripheral vasoconstriction occurs, which increases the diastolic blood pressure, leading to a narrower pulse pressure. Despite these compensations, subtle decreases in cerebral oxygenation manifest early as behavioral changes, including restlessness, anxiety, or mild agitation.

Adım Adım Çözüm

1
Identify the stage and type of shock described in the scenario.
The scenario requires identifying the early (compensatory) stage of hypovolemic shock, typically caused by hemorrhage following major abdominal surgery.
Recognizing the specific stage of shock is critical because assessment findings change drastically as shock progresses from compensatory to progressive, and ultimately to irreversible stages.
2
Analyze physiological responses in the compensatory stage of hypovolemic shock.
The body activates the sympathetic nervous system and the renin-angiotensin-aldosterone system. This leads to tachycardia, tachypnea, peripheral vasoconstriction, and shunting of blood to vital organs.
Understanding the underlying pathophysiology explains the expected vital signs and physical assessment findings.
3
Evaluate each option against the compensatory mechanisms.
Restlessness (decreased cerebral perfusion), narrowing pulse pressure (vasoconstriction raising diastolic pressure), and tachypnea (compensatory oxygen demand) align with early shock. Acidosis, warm skin, and bradycardia do not.
This process eliminates distractors that represent different types of shock (e.g., septic shock) or later stages of physiological decompensation.

Anahtar Kavram

Compensatory mechanisms and early clinical manifestations of hypovolemic shock
Soru 376Soru →

A client with a severe soft tissue infection is receiving a newly prescribed intravenous antibiotic. Ten minutes after the infusion begins, the client becomes visibly anxious and states, "My throat feels very tight." Which of the following additional assessment findings would indicate the client is developing anaphylactic shock? Select all that apply.

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Cevap: Diffuse urticaria and generalized pruritus; Expiratory wheezing and tachypnea; Tachycardia with a weak, thready pulse

Cevap

The correct findings indicating anaphylactic shock are diffuse urticaria and generalized pruritus, expiratory wheezing and tachypnea, and tachycardia with a weak, thready pulse.
Anaphylactic shock is a severe, systemic hypersensitivity reaction characterized by massive release of histamine and other chemical mediators. This leads to increased capillary permeability causing cutaneous reactions like urticaria and pruritus. It also causes profound smooth muscle contraction in the airways, resulting in bronchospasm, wheezing, and tachypnea. Finally, systemic vasodilation causes a rapid drop in blood pressure, prompting a compensatory tachycardia with a weak, thready pulse due to decreased cardiac output.

Adım Adım Çözüm

1
Analyze the client's presentation and recognize the medical emergency.
The client's acute anxiety and report of throat tightness shortly after starting a new IV medication highly suggest an allergic reaction progressing to anaphylaxis.
Identifying the underlying pathophysiology is essential for anticipating related systemic manifestations.
2
Evaluate each assessment finding against the pathophysiology of anaphylactic shock.
Anaphylaxis involves massive histamine release, leading to increased capillary permeability (urticaria), smooth muscle contraction (bronchospasm and wheezing), and massive vasodilation (compensatory tachycardia).
Matching clinical signs to the disease process isolates the correct manifestations.
3
Identify the incorrect assessment findings.
Elevated blood pressure and respiratory alkalosis contradict the hemodynamics and respiratory compromise typical of anaphylaxis.
Anaphylactic shock causes severe hypotension and respiratory acidosis due to airway obstruction.

Anahtar Kavram

Pathophysiology and clinical manifestations of anaphylactic shock
Soru 377Soru →

A nurse is caring for a client with a severe intra-abdominal infection who has received 3 L3\text{ L} of 0.9%0.9\% sodium chloride intravenously over the past 22 hours. The client is lethargic, and the nurse notes the following assessment findings:

AssessmentFinding
Blood pressure78/40 mm Hg78/40\text{ mm Hg}
Heart rate128 beats/min128\text{ beats/min}
Respiratory rate28 breaths/min28\text{ breaths/min}
Urine output10 mL/hr10\text{ mL/hr}
Arterial Blood GaspH=7.25pH = 7.25, PaCO2=30 mm HgPaCO_2 = 30\text{ mm Hg}, HCO3−=14 mEq/LHCO_3^- = 14\text{ mEq/L}

Based on these findings, which of the following actions is the nurse's priority?

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Cevap: Initiate a prescribed continuous intravenous infusion of norepinephrine.

Cevap

The priority action is to initiate a prescribed continuous intravenous infusion of norepinephrine.
The client is exhibiting signs of fluid-refractory septic shock, evidenced by profound hypotension (Mean Arterial Pressure <65 mm Hg< 65\text{ mm Hg}) and oliguria despite receiving a massive fluid bolus of 3 L3\text{ L}. The ABG reveals a metabolic acidosis, which in this context is lactic acidosis secondary to systemic hypoperfusion. The compensatory mechanism for this is tachypnea (blowing off CO2CO_2). The absolute highest priority is to restore vascular tone and vital organ perfusion by initiating a vasopressor such as norepinephrine.

Adım Adım Çözüm

1
Evaluate the client's hemodynamic status and response to initial fluid resuscitation.
The blood pressure remains critically low (78/40 mm Hg78/40\text{ mm Hg}, resulting in a Mean Arterial Pressure of approximately 52 mm Hg52\text{ mm Hg}) despite the administration of a massive 3 L3\text{ L} isotonic fluid bolus.
This identifies that the client has progressed to fluid-refractory septic shock and requires immediate escalation of cardiovascular support.
2
Analyze the arterial blood gas (ABG) results in the context of the clinical picture.
The ABG shows a partially compensated metabolic acidosis (pHpH 7.257.25, HCO3−HCO_3^- 14 mEq/L14\text{ mEq/L}) with compensatory hyperventilation (RRRR 2828, PaCO2PaCO_2 30 mm Hg30\text{ mm Hg}).
This confirms that the acid-base imbalance is driven by lactic acid accumulation from poor tissue perfusion (anaerobic metabolism), rather than a primary respiratory issue.
3
Determine the highest priority intervention using ABCs and survival priorities.
Administering a vasopressor (norepinephrine) is identified as the immediate life-saving action.
Restoring systemic vascular resistance and mean arterial pressure is essential to perfuse vital organs, halt the ischemic cascade, and resolve the underlying cause of the lactic acidosis.

Anahtar Kavram

Management of fluid-refractory septic shock and recognition of secondary lactic acidosis.
Soru 378Soru →

A nurse is planning care for a client who is 8 hours post-operative following a right total hip arthroplasty utilizing a posterior approach. Which of the following nursing interventions should the nurse implement to reduce the client's risk for postoperative complications? Select all that apply.

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Cevap: Place an abduction wedge between the client's legs while the client is resting in bed.; Assess the pedal pulses, capillary refill, and sensation of the right lower extremity.; Apply bilateral sequential compression devices (SCDs) as prescribed.

Cevap

The correct interventions are placing an abduction wedge between the client's legs, assessing the neurovascular status of the right lower extremity, and applying bilateral sequential compression devices.
Following a posterior approach total hip arthroplasty, the client is at high risk for joint dislocation, deep vein thrombosis (DVT), and neurovascular compromise. Nursing interventions to reduce these risks include using an abduction wedge to prevent hip adduction, applying sequential compression devices to promote venous return, and frequently performing targeted neurovascular assessments to detect early signs of impaired tissue perfusion or nerve damage.

Adım Adım Çözüm

1
Identify the surgical procedure and its associated risks.
The client had a posterior approach total hip arthroplasty. Major risks include hip dislocation, venous thromboembolism (DVT/PE), and neurovascular compromise.
Understanding the specific risks associated with the posterior approach is necessary to determine appropriate preventative interventions.
2
Evaluate the positioning options for hip dislocation risk.
Abduction wedges prevent adduction (a risk factor), so they are correct. Elevating the head of the bed to 90 degrees causes extreme hip flexion (another risk factor), so it is incorrect.
Following a posterior approach, patients must avoid hip flexion greater than 90 degrees, adduction, and internal rotation.
3
Evaluate the remaining interventions for safety and complication prevention.
Neurovascular assessments and SCD application actively prevent or detect complications. Delegating dressing evaluation and placing a pillow under the knee introduce new risks (missed hemorrhage and DVT, respectively).
Nursing care must focus on proactive monitoring and avoiding practices that impede circulation or violate scope of practice.

Anahtar Kavram

Postoperative Risk Reduction: Total Hip Arthroplasty
Soru 379Soru →

A client admitted with cardiogenic shock requires hemodynamic support. The healthcare provider orders a continuous intravenous infusion of dobutamine at a rate of 5 mcg/kg/min5\text{ mcg/kg/min}. The client's current weight is 82 kg82\text{ kg}. The pharmacy dispenses a premixed bag containing 500 mg500\text{ mg} of dobutamine in 250 mL250\text{ mL} of 5%5\% dextrose in water (D5WD_5W).

At what rate, in mL/hr\text{mL/hr}, should the nurse program the infusion pump? Record your answer as a number with one decimal place.

Cevabı ve açıklamayı göster

Cevap: 12.3

Cevap

12.3
The correct infusion rate is calculated by determining the total weight-based dose per minute, converting it to an hourly dose, aligning the units with the supplied medication, and dividing by the concentration of the IV bag. This sequential mathematical process accurately results in an infusion pump setting of 12.3 mL/hr.

Adım Adım Çözüm

1
Determine the total dose of dobutamine required per minute.
82 kg×5 mcg/kg/min=410 mcg/min82\text{ kg} \times 5\text{ mcg/kg/min} = 410\text{ mcg/min}
The prescribed dose is weight-based, so the client's total weight in kilograms must be multiplied by the ordered rate.
2
Convert the per-minute dose to an hourly dose.
410 mcg/min×60 min/hr=24,600 mcg/hr410\text{ mcg/min} \times 60\text{ min/hr} = 24,600\text{ mcg/hr}
Intravenous infusion pumps are programmed in milliliters per hour, requiring the medication dose to be calculated over a 60-minute period.
3
Convert the hourly dose from micrograms (mcg) to milligrams (mg).
24,600 mcg÷1000 mcg/mg=24.6 mg/hr24,600\text{ mcg} \div 1000\text{ mcg/mg} = 24.6\text{ mg/hr}
The supplied medication is measured in milligrams, so the requested dose must be converted to align with the available supply.
4
Determine the concentration of the supplied dobutamine.
500 mg÷250 mL=2 mg/mL500\text{ mg} \div 250\text{ mL} = 2\text{ mg/mL}
Calculating the milligrams of medication per single milliliter of fluid simplifies the final volume calculation.
5
Calculate the required infusion pump rate.
24.6 mg/hr÷2 mg/mL=12.3 mL/hr24.6\text{ mg/hr} \div 2\text{ mg/mL} = 12.3\text{ mL/hr}
Dividing the required hourly dose by the concentration of the IV solution yields the final volume to infuse per hour.

Anahtar Kavram

Weight-Based Intravenous Dosing and Pump Rate Calculation
Soru 380Soru →

A nurse in the emergency department is caring for a client who is admitted with severe diabetic ketoacidosis (DKA). The client is lethargic, has a blood glucose of 680 mg/dL680\text{ mg/dL} (37.7 mmol/L37.7\text{ mmol/L}), and an arterial pH of 7.127.12. Arrange the following collaborative and nursing interventions in the correct chronological order of implementation.

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Cevap

1. Administer a rapid infusion of 0.9% sodium chloride; 2. Verify the initial serum potassium level; 3. Initiate an IV infusion of regular insulin; 4. Add 5% dextrose to the fluids; 5. Administer the first dose of subcutaneous insulin.
The evidence-based sequence for DKA management is: 1) restore intravascular volume with isotonic normal saline, 2) check potassium to ensure it is safe to administer insulin, 3) administer continuous IV regular insulin to stop ketogenesis, 4) add dextrose to the IV fluids when the blood glucose reaches 250 mg/dL to prevent hypoglycemia, and 5) transition to subcutaneous insulin once the anion gap is closed.

Adım Adım Çözüm

1
Address the primary life threat: severe dehydration and hypovolemia.
Intravenous 0.9% sodium chloride is administered rapidly.
Patients with severe DKA can lose up to 10% of their body weight in fluids due to osmotic diuresis. Restoring perfusion is the absolute first step.
2
Assess electrolyte status prior to starting hormonal therapy.
The serum potassium level is verified.
Insulin shifts potassium into cells. If the patient is already hypokalemic, administering insulin could cause a fatal cardiac arrhythmia. Potassium must be known and, if necessary, replaced first.
3
Treat the underlying pathophysiology (ketogenesis).
A continuous intravenous infusion of regular insulin is initiated.
Insulin stops the breakdown of fats, halting ketone production and gradually lowering blood glucose.
4
Prevent complications of rapid glucose lowering.
5% dextrose is added to the intravenous fluids when blood glucose reaches approximately 250 mg/dL.
Adding dextrose prevents hypoglycemia while allowing the insulin drip to continue running in order to fully close the anion gap. It also prevents cerebral edema from rapid osmotic shifts.
5
Transition to maintenance therapy.
Subcutaneous insulin is administered.
Once the ketoacidosis resolves (the anion gap closes), the patient is transitioned to subcutaneous insulin prior to stopping the IV drip to prevent DKA recurrence.

Anahtar Kavram

Prioritization in Diabetic Ketoacidosis (DKA) Management
Tahmini Süre:2m 0s
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Physiological Integrity Alıştırma Soruları — NCLEX-RN — Sayfa 19 | Examkin