Physiological Integrity

1960 questions

Question 701Question →

During the initial 1212 hours following a transsphenoidal hypophysectomy for a pituitary adenoma, the nurse evaluates a 4545-year-old client's clinical status. Which assessment findings indicate impending physiological decompensation and require immediate risk reduction interventions? (Select all that apply)

Select all that apply

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Answer: The client reports a constant sensation of postnasal drip and frequent swallowing.; Urine output totals 1,2001,200 mL over a 22-hour period with a specific gravity of 1.0011.001.; The client states that their peripheral vision is significantly blurrier than it was prior to surgery.

Answer

The correct selections are the constant sensation of postnasal drip/swallowing, the massive polyuria with low specific gravity, and the sudden blurring of peripheral vision.
The correct findings requiring immediate intervention include constant swallowing (which indicates a cerebrospinal fluid leak descending into the pharynx), massive dilute polyuria (which indicates the onset of Diabetes Insipidus leading to severe fluid volume deficit), and sudden visual changes (which indicate a space-occupying hematoma compressing the optic chiasm). All three represent critical physiological decompensations.

Step-by-Step Solution

1
Analyze the surgical procedure and its specific high-risk anatomical structures.
Transsphenoidal hypophysectomy involves traversing the sphenoid sinus to reach the pituitary gland, placing the optic chiasm, meninges, and neurohypophysis at high risk for trauma.
Understanding the anatomical pathway is critical for predicting localized complications.
2
Evaluate each assessment finding to differentiate between expected postoperative occurrences and severe complications.
Frequent swallowing (CSF leak), extreme dilute polyuria (Diabetes Insipidus), and visual changes (optic nerve compression) are identified as acute decompensations.
Risk reduction requires prioritizing immediate physiological threats over expected postoperative baseline findings like mild pain or scant bleeding.

Key Concept

Postoperative complication recognition and risk reduction following transsphenoidal hypophysectomy.
Question 702Question →

A 45-year-old client is receiving continuous mechanical ventilation in the intensive care unit following a severe traumatic brain injury. The client's current intracranial pressure (ICP) reads 24 mmHg. The nurse reviews the most recent assessment data:

- Neurological: Sedated; pupils are equal but sluggish to react.
- Hemodynamics: Blood pressure 170/86 mmHg, heart rate 54 bpm, temperature 37.4°C (99.3°F).
- Arterial Blood Gas (ABG): pH 7.31, PaCO2 56 mmHg, HCO3 25 mEq/L, PaO2 94 mmHg.
- Positioning: Head of the bed elevated at 30 degrees, neck in neutral midline alignment.

To reduce the risk of cerebral herniation, which action should the nurse implement first?

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Answer: Collaborate with the respiratory therapist to increase the ventilator's respiratory rate.

Answer

The correct action is to collaborate with the respiratory therapist to increase the ventilator's respiratory rate.
The client is exhibiting clinical signs of impending cerebral herniation (Cushing's triad: hypertension with a widened pulse pressure and bradycardia) alongside a critically elevated intracranial pressure of 24 mmHg (normal is 5-15 mmHg). The arterial blood gas reveals uncompensated respiratory acidosis with significant hypercapnia (PaCO2 56 mmHg). Carbon dioxide is a potent cerebral vasodilator. When PaCO2 rises, cerebral blood vessels dilate, increasing intracranial blood volume and driving up ICP. The priority risk reduction action is to increase minute ventilation by collaborating to increase the ventilator's respiratory rate. This 'blows off' excess CO2, promoting cerebral vasoconstriction and rapidly lowering the ICP.

Step-by-Step Solution

1
Evaluate the client's current hemodynamics by calculating Mean Arterial Pressure (MAP) and Cerebral Perfusion Pressure (CPP).
MAP=170+2(86)3=114MAP = \frac{170 + 2(86)}{3} = 114 mmHg. CPP=114−24=90CPP = 114 - 24 = 90 mmHg.
To verify that the brain is receiving adequate blood flow (target CPP > 60-70 mmHg). Since CPP is adequate at 90 mmHg, the immediate physiological priority shifts directly to lowering the abnormally high ICP (target < 20 mmHg).
2
Analyze the Arterial Blood Gas (ABG) results.
pH 7.31 (acidosis), PaCO2 56 mmHg (respiratory acidosis), HCO3 25 mEq/L (normal).
To identify any metabolic or respiratory derangements that could be precipitating the intracranial hypertension.
3
Connect the physiological laboratory data to the cerebral pathology.
The client has hypercapnia. Elevated carbon dioxide is a potent cerebral vasodilator.
Understanding this physiological relationship identifies the root cause of the current ICP spike. The vasodilation is increasing cerebral blood volume, which in the confined space of the skull, drives up ICP.
4
Determine the priority intervention to mitigate the precipitating cause.
Increasing the mechanical ventilator's respiratory rate or tidal volume.
Increasing minute ventilation will 'blow off' excess CO2, bringing the PaCO2 down to a normal range (35-45 mmHg). This promotes cerebral vasoconstriction, effectively reducing intracranial pressure and the risk of herniation.

Key Concept

Cerebral hemodynamics and risk reduction in elevated intracranial pressure.
Estimated Time:2m 0s
Question 703Question →

A nurse is assessing a client who is receiving a continuous peripheral intravenous (IV) infusion of norepinephrine. The nurse notes that the IV insertion site is blanched, cool to the touch, and swollen. The client reports a severe burning sensation at the site. Arrange the following nursing actions in the exact sequence they should be performed, from first to last.

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Answer

The correct sequence for managing a vasopressor extravasation is to first stop the infusion, then aspirate the residual medication, notify the healthcare provider, administer the antidote through the existing catheter, and finally remove the catheter.
When a vesicant like norepinephrine extravasates, the immediate priority is to stop the infusion to prevent further tissue damage. Crucially, the catheter must be left in place initially. This allows the nurse to attach a syringe and aspirate any residual drug from the line and the subcutaneous tissue. The provider is then notified to obtain an order for an antidote, typically phentolamine. The antidote is administered directly through the existing IV line to ensure it reaches the exact site of extravasation and reverses the vasoconstriction. Finally, once the antidote is delivered, the catheter is removed and the extremity is elevated.

Step-by-Step Solution

1
Stop the norepinephrine infusion immediately.
The flow of the vesicant into the subcutaneous tissue is halted.
Continuing the infusion will cause further vasoconstriction, severe ischemia, and subsequent tissue necrosis.
2
Aspirate the residual medication from the intravenous catheter.
Remaining norepinephrine is removed from the catheter and localized tissue.
Aspiration minimizes the total volume of the vesicant that the tissue is exposed to, reducing the severity of the injury.
3
Notify the healthcare provider to obtain a prescription for an antidote.
A prescription for phentolamine is obtained.
Nurses cannot prescribe medications; an order is required to administer the specific pharmacological antidote for alpha-adrenergic extravasation.
4
Administer phentolamine through the existing intravenous catheter.
The antidote reaches the exact site of the extravasation.
Phentolamine induces localized vasodilation, counteracting the severe vasoconstriction caused by norepinephrine. Giving it through the existing line ensures direct delivery to the compromised tissue.
5
Remove the intravenous catheter and elevate the extremity.
The source of the infiltration is removed, and edema is managed.
The catheter has fulfilled its purpose of delivering the antidote and must be removed to prevent infection and allow the site to heal.

Key Concept

Management of Vesicant Extravasation
Question 704Question →

A nurse is preparing to mix and administer regular insulin and NPH insulin in a single syringe for a client with diabetes mellitus. Arrange the following steps in the correct chronological order to ensure safe and effective medication preparation.

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Answer

The correct sequence is to first inject air into the NPH vial, then inject air into the regular vial, withdraw the regular insulin, and finally withdraw the NPH insulin.
When mixing intermediate-acting (NPH, cloudy) and short-acting (regular, clear) insulin, the standard safety protocol is 'clear before cloudy'. First, air is injected into the NPH vial, then air is injected into the regular vial. The regular insulin is then withdrawn first, followed by the NPH insulin. This precise sequence prevents the longer-acting NPH insulin from accidentally contaminating the vial of short-acting regular insulin, which could affect the onset and peak times of future doses.

Step-by-Step Solution

1
Determine the order for injecting air into the vials.
Air must be injected into the cloudy (NPH) vial first, followed by the clear (regular) vial.
Injecting air equalizes the pressure inside the vials. Doing the NPH vial first ensures the needle does not carry regular insulin into the NPH vial prematurely.
2
Determine the order for withdrawing the medication.
The clear (regular) insulin is withdrawn first, followed by the cloudy (NPH) insulin.
Drawing up the clear insulin before the cloudy insulin prevents accidental contamination of the rapid/short-acting insulin vial with intermediate-acting insulin.

Key Concept

Safe Preparation of Mixed Insulin (Clear Before Cloudy)
Question 705Question →

A nurse is caring for an older adult client who is 3 hours post-percutaneous coronary intervention (PCI) via a right femoral artery approach. The client, who has a history of osteoarthritis, reports severe lower back stiffness and requests to sit upright or get out of bed. Which intervention should the nurse implement to promote comfort while ensuring client safety?

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Answer: Maintain the head of the bed elevated no more than 30 degrees and slide a small, rolled towel under the client's lumbar spine.

Answer

The correct action is to maintain the head of the bed elevated no more than 30 degrees and slide a small, rolled towel under the client's lumbar spine.
Following a femoral artery puncture, the client must remain on strict bedrest with the affected leg completely straight for several hours to prevent arterial bleeding or hematoma formation. The head of the bed should not be elevated more than 30 degrees to avoid placing undue pressure on the femoral insertion site. Placing a small, rolled towel or lumbar roll under the lower back safely supports the natural curvature of the spine and alleviates muscle stiffness without compromising the vascular access site.

Step-by-Step Solution

1
Analyze the client's current clinical status and procedure.
The client is 3 hours post-PCI via the right femoral artery.
Identifying the procedure dictates the specific safety parameters for positioning.
2
Determine the required physiological constraints for this procedure.
The right leg must remain completely straight, and the head of the bed cannot be elevated more than 30 degrees.
These restrictions are mandatory to prevent arterial bleeding or hematoma formation at the femoral puncture site.
3
Evaluate the client's request against the safety constraints.
Sitting upright (high-Fowler's) or getting out of bed violates the safety constraints and is contraindicated.
Flexing the groin increases intra-abdominal and groin pressure, risking severe hemorrhage.
4
Select a safe basic care intervention to alleviate lower back stiffness.
Placing a small, rolled towel under the lumbar spine provides comfort while keeping the head of the bed low and the right leg straight.
This intervention respects the anatomical curve of the spine without compromising the vascular access site.

Key Concept

Safe positioning and comfort measures following femoral artery access
Estimated Time:1m 30s
Question 706Question →

A client with a seizure disorder is currently receiving a continuous infusion of 5% dextrose in water (D5W) through a single peripheral IV catheter. The healthcare provider prescribes an immediate dose of intravenous phenytoin. Knowing that phenytoin forms a precipitate when mixed with dextrose solutions, arrange the following nursing actions in the correct chronological sequence to safely deliver the medication.

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Answer

The correct sequence is to first pause the incompatible infusion, flush the line with normal saline, administer the phenytoin slowly, flush again with normal saline at the exact same slow rate, and finally resume the continuous infusion.
When administering an IV push medication that is incompatible with a continuous IV infusion, the nurse must utilize the Saline-Administer-Saline method. First, the continuous infusion must be paused to stop the flow of the incompatible fluid. The line is then aspirated and flushed with a compatible solution (normal saline) to clear the existing fluid from the tubing. Next, the medication is administered at its recommended safe rate. Crucially, the subsequent flush must be administered at the exact same rate as the medication to ensure the drug residing in the tubing dead space is not rapidly flushed into the client's circulation. Finally, the primary infusion can be safely resumed.

Step-by-Step Solution

1
Pause the primary continuous IV infusion pump.
The flow of the incompatible D5W solution is completely stopped.
This is the first essential step to prevent the mixing of phenytoin and dextrose, which causes immediate crystallization.
2
Aspirate for a blood return and flush the IV line with 10 mL of 0.9% sodium chloride.
IV patency is confirmed and the tubing is cleared of D5W.
Confirming patency ensures the medication will enter the vein safely. Normal saline is compatible with phenytoin and clears the incompatible fluid.
3
Administer the IV phenytoin at a rate not exceeding 50 mg/min.
The medication is delivered safely into the saline-primed line.
Rapid administration of phenytoin can cause severe hypotension, bradycardia, and cardiovascular collapse.
4
Flush the IV line again with 10 mL of 0.9% sodium chloride at the same rate the medication was administered.
The medication remaining in the dead space of the IV tubing is cleared into the patient.
If the second flush is given rapidly, the patient receives a rapid bolus of the residual phenytoin in the line, leading to adverse cardiovascular effects.
5
Resume the primary continuous IV infusion of 5% dextrose in water.
The client continues to receive their prescribed continuous IV therapy.
The line is now clear of phenytoin, making it safe to reintroduce the dextrose solution.

Key Concept

Administration of an IV push medication incompatible with the primary continuous IV fluid requires pausing the pump and using the Saline-Administer-Saline method, ensuring the final flush is administered at the same rate as the medication to prevent rapid bolusing of residual drug in the dead space.
Question 707Question →

A client with acute kidney injury is exhibiting profound muscle weakness. The bedside cardiac monitor suddenly displays a widened QRS complex and tall, peaked T waves. The laboratory reports a stat serum potassium level of 7.8 mEq/L7.8\text{ mEq/L}. The healthcare provider has prescribed several urgent interventions. Arrange the following pharmacological actions in the priority sequence the nurse must implement them.

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Answer

The correct priority sequence is to first stabilize the myocardium with calcium gluconate, second shift potassium intracellularly with insulin and dextrose, third remove potassium from the body with sodium polystyrene sulfonate, and finally evaluate the client's response with follow-up laboratory tests.
The pathophysiology of severe hyperkalemia demands a specific sequence of interventions. The most immediate threat to life is cardiac toxicity, manifested by widened QRS complexes and peaked T waves. Therefore, calcium gluconate is always the first line of treatment to raise the threshold potential and stabilize the myocardium. Next, fast-acting agents like IV insulin and dextrose are used to rapidly shift potassium into cells. Slower-acting agents like sodium polystyrene sulfonate are then given for definitive removal from the body. Finally, evaluation of the therapy is required.

Step-by-Step Solution

1
Administer intravenous calcium gluconate.
Myocardial excitability is decreased and the cell membrane is stabilized.
This is the immediate life-saving intervention to prevent lethal ventricular arrhythmias caused by severe hyperkalemia.
2
Administer intravenous regular insulin concurrently with 50% dextrose.
Potassium is rapidly driven from the intravascular space into the intracellular fluid.
This provides a rapid, albeit temporary, reduction in the circulating serum potassium level, buying time for excretion therapies to work.
3
Administer sodium polystyrene sulfonate via retention enema.
Potassium is exchanged for sodium in the large intestine and excreted in feces.
This provides permanent removal of potassium from the body, but is given after stabilizing medications because its onset of action takes hours.
4
Obtain a follow-up serum potassium level.
Current serum electrolyte status is documented.
The nurse must evaluate if the applied medical therapies were effective or if further interventions, such as emergent hemodialysis, are required.

Key Concept

In the presence of hyperkalemia with ECG changes, immediate myocardial stabilization with calcium gluconate must precede therapies that lower serum potassium.
Question 708Question →

During the morning shift, a nurse provides care for a client who underwent a right above-the-knee amputation 48 hours ago. The client is medically stable and preparing to begin physical therapy. To promote optimal physical mobility and prevent common musculoskeletal complications, which intervention should the nurse implement?

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Answer: Assist the client into a prone position for 20 to 30 minutes three to four times a day.

Answer

Assist the client into a prone position for 20 to 30 minutes three to four times a day.
Following an above-the-knee amputation, the most significant risk to physical mobility is the development of a hip flexion contracture, which can prevent the client from successfully wearing and walking with a prosthesis. Placing the client in a prone position for 20 to 30 minutes several times a day physically stretches the hip flexor muscles, maintaining joint extension and preventing contracture formation.

Step-by-Step Solution

1
Identify the primary complication risk for a client 48 hours post-above-the-knee amputation.
The client is at high risk for hip flexion contractures, which impede future prosthetic use.
Surgical trauma and flexor muscle dominance tend to pull the residual limb into a flexed position.
2
Evaluate the clinical interventions based on their effect on hip joint flexion.
Prone positioning extends the hip joint, while prolonged sitting or pillow elevation flexes the hip joint.
Extension prevents contracture formation, whereas prolonged flexion causes muscle shortening.
3
Select the nursing action that safely prevents contractures while adhering to the standard scope of practice.
Assisting the client into a prone position is the correct, safe, and effective intervention.
It directly counteracts the contracture risk without inappropriately delegating nursing assessments.

Key Concept

Prevention of hip flexion contractures following an above-the-knee amputation requires specific positioning strategies, including periodic prone positioning and avoiding residual limb elevation after the first 24 postoperative hours.
Estimated Time:1m 30s
Question 709Question →

A client with a history of cirrhosis is being monitored 22 hours after a large-volume paracentesis in which 66 liters of ascitic fluid were removed. The client's current vital signs are: blood pressure 94/7894/78 mm Hg, heart rate 116116 bpm, and respiratory rate 2424/min. An arterial blood gas (ABG) analysis reveals a pH of 7.297.29, a PaCO2PaCO_2 of 3131 mm Hg, and an HCO3−HCO_3^- of 1515 mEq/L. The unlicensed assistive personnel (UAP) is preparing to assist the client into a high-Fowler's position to eat a meal. Which action should the nurse take first to reduce the risk of a severe complication?

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Answer: Stop the UAP and place the client in a supine position with the lower extremities elevated

Answer

The nurse must immediately stop the UAP from elevating the head of the bed and instead place the client in a supine position with the lower extremities elevated to address the impending hypovolemic shock.
The client is demonstrating early signs of hypovolemic shock (narrow pulse pressure, compensatory tachycardia) and poor tissue perfusion (metabolic acidosis), a known risk called post-paracentesis circulatory dysfunction. Placing the client in a high-Fowler's position will trap blood in the lower extremities and splanchnic bed, decreasing venous return and potentially precipitating immediate cardiovascular collapse. The nurse must immediately intervene to position the client supine with legs elevated to promote venous return to the vital organs.

Step-by-Step Solution

1
Analyze the client's vital signs and clinical context.
The removal of 66 liters of fluid places the client at high risk for fluid shifts. The narrow pulse pressure (1616 mm Hg) and tachycardia (116116 bpm) are early indicators of post-paracentesis circulatory dysfunction (hypovolemic shock).
Recognizing early shock is critical before profound hypotension occurs.
2
Interpret the arterial blood gas (ABG) values.
The ABG shows a low pH (7.297.29) and low HCO3−HCO_3^- (1515 mEq/L), indicating metabolic acidosis. The PaCO2PaCO_2 (3131 mm Hg) is appropriately low as the lungs attempt to compensate.
Metabolic acidosis in this context is likely lactic acidosis caused by poor tissue perfusion, further confirming a state of shock.
3
Evaluate the proposed action of placing the client in a high-Fowler's position.
A high-Fowler's position uses gravity to pool blood in the splanchnic bed and lower extremities, significantly decreasing venous return.
Decreased venous return will worsen the client's already compromised cardiac output.
4
Determine the priority nursing intervention to reduce risk.
The nurse must intervene to place the client flat with elevated legs (modified Trendelenburg).
This position optimizes venous return to the heart and brain, temporarily stabilizing hemodynamics while fluid resuscitation (e.g., albumin) is prepared.

Key Concept

Early recognition and positional management of hypovolemic shock
Question 710Question →

A palliative care team is managing an older adult client who is completely bedbound due to profound cachexia and intractable bone pain. The client exhibits significant muscle wasting and thin, fragile skin. Which interventions are appropriate to include in the client's non-pharmacologic comfort and skin integrity regimen? Select all that apply.

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Answer: Limit the elevation of the head of the bed to 30 degrees or less during rest periods.; Utilize a friction-reducing glide sheet when repositioning the client.; Insert soft foam padding between the client's knees and ankles when placed in a lateral position.

Answer

The appropriate interventions are limiting head-of-bed elevation to 30 degrees or less, using a friction-reducing glide sheet, and inserting foam padding between bony prominences.
The correct interventions focus on minimizing mechanical forces that cause tissue damage. Limiting the head of bed elevation to 30 degrees or less minimizes shearing forces on the sacral area. Using a friction-reducing glide sheet prevents epidermal stripping caused by friction when moving the client. Placing foam padding between the knees and ankles prevents tissue ischemia resulting from direct bone-on-bone contact.

Step-by-Step Solution

1
Analyze the client's risk factors.
The client has profound cachexia, intractable bone pain, muscle wasting, and fragile skin.
Identifying specific vulnerabilities determines which preventative measures are most critical for avoiding skin breakdown and promoting comfort.
2
Evaluate positioning and mobility interventions for safety and efficacy.
Limiting the head of the bed to 30 degrees, using glide sheets, and padding bony prominences are evidence-based practices that reduce shear, friction, and pressure.
These interventions specifically address the mechanical forces that lead to pressure injuries in immobile, cachectic clients.
3
Identify contraindicated practices and scope of practice violations.
Using a ring cushion, dismissing non-blanchable erythema as normal aging, and delegating assessment to UAP must be rejected.
Ring cushions cause venous congestion, non-blanchable erythema is a Stage 1 pressure injury requiring nursing intervention, and assessment cannot be legally delegated.

Key Concept

Evidence-Based Pressure Injury Prevention and Comfort Care
Question 711Question →

A 55-year-old client returns to the medical-surgical unit following an esophagogastroduodenoscopy (EGD) with banding of esophageal varices. The client received intravenous midazolam and fentanyl during the procedure and is currently lethargic but arousable. The client's vital signs are: BP 110/70 mmHg, HR 85 bpm, RR 14/min, and SpO2 96% on room air. Which of the following actions is the most appropriate priority for the nurse to reduce the client's risk of physiological complications?

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Answer: Maintain the client strictly NPO until the return of the gag reflex is clinically confirmed.

Answer

The correct action is to maintain the client strictly NPO until the return of the gag reflex is clinically confirmed.
Following an upper endoscopy (EGD), the client's throat is numbed with a topical anesthetic, temporarily abolishing the gag reflex. Combined with the lingering effects of procedural sedation, the client is at a high risk for aspiration. The nurse must withhold all oral fluids and food (NPO) until the gag reflex has demonstrably returned.

Step-by-Step Solution

1
Analyze the procedure and medications administered.
The client underwent an EGD with variceal banding and received conscious sedation (midazolam, fentanyl) along with a topical anesthetic spray to the posterior pharynx.
Understanding the procedural interventions helps identify the most immediate physiological risks.
2
Identify the greatest physiological risk.
The combination of sedation (causing lethargy) and topical throat anesthesia (suppressing the gag reflex) creates a severe risk for aspiration of oral secretions or emesis.
Aspiration can lead to airway obstruction, hypoxia, and aspiration pneumonia, making airway protection the top priority based on the ABCs (Airway, Breathing, Circulation).
3
Evaluate the nursing actions to mitigate the identified risk.
Keeping the client NPO directly prevents aspiration until the protective gag reflex is fully restored. The other options introduce new risks or are clinically inappropriate.
This action directly addresses the highest priority physiological need and prevents a life-threatening complication.

Key Concept

Post-procedure airway protection and aspiration prevention
Question 712Question →

A client is brought to the emergency department experiencing a severe asthma exacerbation. The client is initially restless and tachypneic with an arterial blood gas (ABG) showing a pH of 7.507.50, PaCO2PaCO_2 of 28 mm Hg28 \text{ mm Hg}, and HCO3−HCO_3^- of 24 mEq/L24 \text{ mEq/L}. One hour later, the nurse notes that the client has become lethargic and the respiratory rate has decreased to 1010 breaths per minute. A repeat ABG shows a pH of 7.287.28, PaCO2PaCO_2 of 58 mm Hg58 \text{ mm Hg}, and HCO3−HCO_3^- of 24 mEq/L24 \text{ mEq/L}. Which of the following is the priority nursing action?

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Answer: Prepare the client for immediate endotracheal intubation and mechanical ventilation.

Answer

Prepare the client for immediate endotracheal intubation and mechanical ventilation.
The correct action addresses the immediate life-threatening issue. The client's transition from hyperventilation (respiratory alkalosis) to hypoventilation with lethargy and carbon dioxide retention (respiratory acidosis) signals the exhaustion of the respiratory muscles. This is a classic presentation of impending respiratory failure in status asthmaticus, which requires prompt airway management and ventilatory support.

Step-by-Step Solution

1
Analyze the initial ABG results.
A pH of 7.507.50 (alkalosis), PaCO2PaCO_2 of 2828 (decreased), and HCO3−HCO_3^- of 2424 (normal) indicates uncompensated respiratory alkalosis due to hyperventilation.
Early asthma exacerbations cause hyperventilation, leading to an excessive 'blowing off' of carbon dioxide.
2
Evaluate the clinical changes and the repeat ABG results.
The client became lethargic with a decreased respiratory rate. The repeat ABG shows a pH of 7.287.28 (acidosis), PaCO2PaCO_2 of 5858 (increased), and HCO3−HCO_3^- of 2424 (normal).
These findings indicate uncompensated respiratory acidosis and a significant clinical deterioration.
3
Determine the pathophysiological mechanism.
The client has developed respiratory muscle fatigue, leading to hypoventilation, carbon dioxide retention, and impending respiratory failure.
A transition from respiratory alkalosis to respiratory acidosis in a client having an asthma attack is a medical emergency.
4
Select the priority intervention based on the ABCs (Airway, Breathing, Circulation).
Airway protection and breathing support are the absolute immediate priorities.
Mechanical ventilation is required to restore adequate gas exchange, remove retained carbon dioxide, and prevent cardiac arrest.

Key Concept

Impending respiratory failure in severe asthma is clinically indicated by a transition from respiratory alkalosis to respiratory acidosis accompanied by fatigue, requiring immediate mechanical ventilation.
Question 713Question →

The charge nurse is observing a newly licensed nurse provide care for a client who is receiving continuous enteral nutrition through a percutaneous endoscopic gastrostomy (PEG) tube. Which of the following actions by the newly licensed nurse indicate appropriate basic care and comfort measures? Select all that apply.

Select all that apply

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Answer: Flushes the enteral tube with 30 mL of sterile water every 4 hours.; Maintains the client's bed elevation at a 30-degree angle or higher throughout the duration of the infusion.; Cleanses the skin surrounding the gastrostomy stoma daily using mild soap and warm water.

Answer

The correct actions include flushing the tube with 30 mL of water every 4 hours, maintaining the bed elevation at 30 degrees or higher, and cleansing the stoma site daily with mild soap and water.
The correct actions align with fundamental safety and comfort standards for enteral nutrition. Flushing the tube every 4 hours ensures it remains patent and delivers necessary hydration. Keeping the head of the bed elevated at 30 degrees or higher uses gravity to prevent gastric reflux and subsequent aspiration. Daily cleansing of the stoma site with mild soap and warm water removes drainage and prevents excoriation, thereby maintaining skin integrity.

Step-by-Step Solution

1
Evaluate each action for its impact on patient safety regarding aspiration.
Maintaining a 30-degree head-of-bed elevation is required. Leaving the feeding running while the bed is flat is dangerous.
Enteral feedings can easily reflux into the esophagus and airway if gravity is not utilized to keep contents in the stomach.
2
Assess the appropriateness of delegation to assistive personnel.
Evaluating skin integrity cannot be delegated.
Assessments require nursing judgment and must be performed by the registered nurse.
3
Determine the correct physical assessment sequence.
Palpating before auscultating is incorrect.
Touching the abdomen can stimulate bowel motility, creating inaccurate auscultation findings.
4
Identify standard maintenance and hygiene practices for PEG tubes.
Flushing every 4 hours and washing the site daily with mild soap and water are correct.
These actions prevent tube occlusion, provide hydration, and protect the peri-stomal skin from breakdown.

Key Concept

Basic Care and Comfort: Enteral Nutrition Management
Question 714Question →

A nurse is preparing to administer an intravenous piggyback (IVPB) dose of a prescribed antibiotic through a client's continuous primary intravenous infusion of 0.9% sodium chloride. In what order should the nurse perform the following actions? Arrange the steps from first to last.

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Answer

The correct sequence is to first verify compatibility, then spike the bag, prime the tubing, scrub the primary line port, and finally connect the secondary tubing while lowering the primary fluid bag.
The correct sequence prioritizes safety, infection control, and proper fluid dynamics. Compatibility must always be verified first to prevent precipitation. Once verified, the equipment is prepared by clamping and spiking the bag, followed by priming to eliminate air. After the equipment is ready, the access port is scrubbed to ensure asepsis immediately prior to connection. Finally, connecting the tubing and lowering the primary bag allows the secondary medication to infuse via gravity.

Step-by-Step Solution

1
Verify the compatibility of the prescribed antibiotic with the primary intravenous fluid.
The nurse confirms it is safe to administer the medications together.
Checking compatibility is the first critical safety step to prevent adverse chemical reactions or precipitation in the intravenous line.
2
Close the roller clamp on the secondary tubing and spike the antibiotic infusion bag.
The secondary bag is successfully connected to the tubing without spilling medication.
Closing the clamp ensures the medication does not immediately run through the line and spill out before the nurse is ready to prime it.
3
Prime the secondary tubing by slowly opening the roller clamp to clear air from the line.
The secondary tubing is filled with fluid and free of air bubbles.
Removing air from the intravenous tubing is essential to prevent a potentially fatal air embolism.
4
Scrub the uppermost Y-port on the primary intravenous tubing with an antiseptic swab.
The injection port is disinfected.
Cleansing the access port with friction removes pathogens and prevents the introduction of microorganisms into the bloodstream.
5
Connect the secondary tubing to the primary line and lower the primary fluid bag using an extension hook.
The intravenous piggyback is correctly attached and positioned for gravity infusion.
Lowering the primary bag ensures the piggyback medication, positioned higher, will overcome the hydrostatic pressure of the primary line and infuse completely before the primary fluid resumes.

Key Concept

Safe administration of intravenous piggyback (IVPB) medications requires verifying compatibility, maintaining aseptic technique, preventing air embolisms, and utilizing gravity principles.
Question 715Question →

A nurse is assessing a client who is recovering in the intensive care unit following a coronary artery bypass graft (CABG) surgery. Which of the following clinical findings should indicate to the nurse that the client is developing cardiac tamponade? Select all that apply.

Select all that apply

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Answer: Distant, muffled heart sounds upon auscultation; Distended neck veins while the head of the bed is elevated at 45 degrees; A drop in systolic blood pressure of 15 mm Hg during inspiration

Answer

The correct findings are distant, muffled heart sounds, distended neck veins while the head of the bed is elevated, and a drop in systolic blood pressure of 15 mm Hg during inspiration.
Cardiac tamponade is a life-threatening complication where fluid or blood rapidly accumulates in the pericardial space, severely restricting ventricular filling and causing obstructive shock. The classic presentation, known as Beck's triad, includes distant or muffled heart sounds (due to fluid muffling the sound), jugular venous distension (due to impaired right ventricular filling causing systemic venous congestion), and hypotension. Another hallmark sign is pulsus paradoxus, which is an exaggerated drop in systolic blood pressure (greater than 10 mm Hg) during inspiration.

Step-by-Step Solution

1
Analyze the client's postoperative context and the pathophysiology of cardiac tamponade.
Cardiac tamponade involves fluid or blood accumulating in the pericardial sac, which compresses the heart and restricts ventricular filling (obstructive shock).
Understanding the mechanism helps identify the resulting hemodynamic changes.
2
Evaluate each option against the expected signs of cardiac tamponade (Beck's triad and pulsus paradoxus).
Muffled heart sounds, jugular venous distension, and pulsus paradoxus (systolic drop greater than 10 mm Hg during inspiration) are classic signs.
These findings directly reflect the fluid accumulation and increased intrapericardial pressure.
3
Identify and exclude findings that contradict the pathophysiology of tamponade.
Widening pulse pressure and increased chest tube drainage are excluded. Tamponade causes a narrowing pulse pressure, and it often occurs when chest tube drainage suddenly stops.
Accurate clinical judgment requires distinguishing true complications from unrelated or opposite signs.

Key Concept

Recognition of Cardiac Tamponade
Question 716Question →

A healthcare provider orders intermittent intravenous ceftriaxone for an adult client diagnosed with community-acquired pneumonia. The client's only vascular access is a peripheral catheter currently infusing lactated Ringer's solution at 100 mL/hr. What is the safest action by the nurse regarding the administration of this antibiotic?

Show answer & explanation

Answer: Halt the continuous infusion, flush the line with normal saline, infuse the antibiotic, and flush the line again.

Answer

The safest action is to halt the continuous infusion of lactated Ringer's, flush the line with normal saline, infuse the antibiotic, and then flush the line again before restarting the primary fluid.
Ceftriaxone binds chemically with calcium to form a particulate precipitate that can lead to fatal organ damage, particularly in the lungs or kidneys. Because lactated Ringer's solution contains calcium, the two fluids are highly incompatible. When a client has a single IV access site, the standard and safest nursing practice is to pause the incompatible continuous fluid, completely flush the tubing with a neutral, compatible solution (like 0.9% sodium chloride), infuse the medication, and then flush the line again before restarting the primary fluid.

Step-by-Step Solution

1
Verify the compatibility of the prescribed antibiotic (ceftriaxone) with the current continuous IV fluid (lactated Ringer's solution).
Identify that ceftriaxone is incompatible with lactated Ringer's.
Lactated Ringer's contains calcium. Ceftriaxone binds with calcium to form a dangerous, solid precipitate that can cause fatal organ damage.
2
Determine the best procedural intervention for administering an incompatible medication through a single IV access site.
Select the Saline-Administer-Saline (SAS) flush method.
The nurse must clear the IV tubing of the incompatible fluid to ensure the two substances never mix in the line.
3
Execute the administration protocol.
Pause the pump, flush thoroughly with 0.9% sodium chloride, infuse the ceftriaxone, flush again with 0.9% sodium chloride, and restart the pump.
This guarantees that the antibiotic reaches the bloodstream safely without interacting with the calcium-containing primary fluid.

Key Concept

Ceftriaxone is contraindicated for concurrent administration with calcium-containing intravenous solutions due to the risk of precipitate formation. When managing incompatible medications in a single line, the tubing must be thoroughly flushed with a compatible solution before and after administration.
Question 717Question →

A nurse is planning care for a group of clients receiving pharmacological and parenteral therapies. Which of the following actions demonstrate safe and effective nursing practice? (Select all that apply.)

Select all that apply

Show answer & explanation

Answer: Flush a central venous access device with 1010 mL of sterile 0.9%0.9\% sodium chloride before and after administering an intravenous push medication.; Dedicate a single lumen of a multi-lumen central venous catheter exclusively for the administration of total parenteral nutrition.; Review the client's most recent serum potassium level prior to initiating a continuous intravenous infusion of potassium chloride.

Answer

The correct actions represent adherence to evidence-based safety guidelines: flushing a central line with an appropriately sized syringe (1010 mL), dedicating a single catheter lumen strictly for total parenteral nutrition, and verifying baseline electrolyte values before administering potassium chloride.
Safe parenteral therapy relies on proactive risk management. Using a 1010 mL syringe to flush a central line prevents catheter rupture caused by high pressure. Dedicating a single lumen for total parenteral nutrition prevents dangerous drug interactions and minimizes central line-associated bloodstream infections. Finally, verifying serum potassium levels before initiating a potassium chloride infusion is a mandatory safety check to prevent fatal cardiac dysrhythmias.

Step-by-Step Solution

1
Evaluate the central line flushing technique.
Using a 1010 mL syringe with 0.9%0.9\% sodium chloride is identified as the correct standard.
Smaller syringes create excessive pressure that can rupture central venous catheters.
2
Analyze the vancomycin dosage calculation and infusion rate.
The rate of 500500 mL/hr is identified as dangerously fast for a 22-gram dose.
Vancomycin must be infused over at least 120120 minutes for a 22-gram dose to prevent Red Man Syndrome.
3
Assess the compatibility of ceftriaxone and lactated Ringer's.
This combination is identified as strictly contraindicated.
Ceftriaxone forms fatal precipitates when mixed with calcium, which is present in lactated Ringer's solution.
4
Evaluate the management of total parenteral nutrition (TPN).
Dedicating a specific central line lumen for TPN is recognized as correct.
TPN has a high infection risk and is incompatible with many medications.
5
Prioritize interventions for a client experiencing an allergic reaction.
Assessing the airway before stopping the penicillin infusion is identified as the incorrect sequence.
The absolute first priority is to stop the offending medication to prevent further systemic allergen exposure.
6
Determine the safety prerequisite for potassium administration.
Checking the most recent serum potassium level is identified as a necessary action.
Potassium is a high-alert medication; giving it without knowing current levels risks fatal hyperkalemia.

Key Concept

Safe administration of parenteral therapies requires strict adherence to infusion rate guidelines, rigorous compatibility checks, prioritization of source control during adverse reactions, and diligent pre-administration laboratory monitoring.
Question 718Question →

A nurse is preparing to obtain a blood specimen for laboratory testing from a client's central venous catheter (CVC). A continuous intravenous infusion is currently running through the lumen. Arrange the following steps in the correct chronological order for safely drawing the blood specimen using the discard method.

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Answer

The correct sequence is: Pause the continuous infusion, scrub the connector hub, aspirate and discard the initial 5 mL of blood, withdraw the required specimen, flush the catheter with normal saline, and finally resume the continuous infusion.
To maintain patient safety, specimen integrity, and line patency, the nurse must first stop any fluids that could alter the sample. Strict infection control (scrubbing the hub) is applied next. The discard step guarantees the drawn specimen is pure blood and not diluted with the prior infusion. After the clean sample is collected, the line must be flushed to prevent blood from clotting in the catheter before the continuous therapy is safely resumed.

Step-by-Step Solution

1
Pause the continuous IV infusion.
The flow of fluid and medication into the bloodstream is temporarily stopped.
Prevents mixing of the IV fluid with the blood specimen, which would alter laboratory results.
2
Scrub the hub with antiseptic.
Pathogens are removed from the entry point.
Maintains strict asepsis and prevents the introduction of bacteria into the central circulation.
3
Aspirate and discard 5 mL of blood.
Residual fluid within the catheter space is removed.
Ensures the subsequent sample is undiluted whole blood.
4
Withdraw the diagnostic specimen.
An accurate, uncontaminated blood sample is obtained.
Provides reliable data for clinical decision-making.
5
Flush the catheter with 0.9% sodium chloride.
The catheter lumen is cleared of all blood.
Prevents the blood from clotting inside the lumen and maintains catheter patency.
6
Restart the continuous infusion.
The client's parenteral therapy continues.
Ensures there is no prolonged interruption in the client's prescribed medical treatment.

Key Concept

Central Venous Catheter (CVC) Blood Specimen Collection
Estimated Time:1m 0s
Question 719Question →

A nurse is caring for a client who has been receiving continuous gastric suctioning via a nasogastric (NG) tube for the past 72 hours due to a mechanical bowel obstruction. During the morning assessment, the client reports muscle cramps and a tingling sensation in the fingertips. Based on the client's clinical presentation and current therapy, which of the following arterial blood gas (ABG) results should the nurse anticipate?

Show answer & explanation

Answer: pH 7.50, PaCO2 48 mm Hg, HCO3 32 mEq/L

Answer

The ABG values indicating metabolic alkalosis with partial respiratory compensation (elevated pH, elevated HCO3, and elevated PaCO2).
Prolonged nasogastric suctioning depletes the body of gastric secretions, which are rich in hydrochloric acid, potassium, and sodium. The loss of acid leads to a primary metabolic alkalosis, characterized by an elevated pH (> 7.45) and an elevated bicarbonate (HCO3 > 26 mEq/L). The body attempts to compensate by decreasing the respiratory rate to retain carbon dioxide, leading to an elevated PaCO2 (> 45 mm Hg). Furthermore, metabolic alkalosis decreases ionized calcium levels in the blood, which causes the neuromuscular excitability manifested as muscle cramps and tingling (paresthesia). The correct option presents the exact parameters of metabolic alkalosis with partial respiratory compensation.

Step-by-Step Solution

1
Identify the primary physiological impact of continuous nasogastric suctioning.
Gastric contents are highly acidic due to hydrochloric acid. Continuous removal leads to a significant loss of hydrogen ions.
Understanding the fluid being lost determines the resulting acid-base imbalance.
2
Determine the expected acid-base imbalance from the loss of stomach acid.
Loss of body acid results in an accumulation of base (bicarbonate), leading to metabolic alkalosis. This is characterized by an elevated pH (> 7.45) and elevated HCO3 (> 26 mEq/L).
Acid loss directly raises blood pH and increases the relative concentration of bicarbonate.
3
Analyze the client's symptoms of muscle cramps and tingling.
Alkalosis causes increased binding of calcium to albumin, reducing ionized calcium levels in the blood. Hypocalcemia causes neuromuscular excitability, explaining the cramps and tingling.
Correlating clinical signs with the anticipated physiological state confirms the metabolic disturbance.
4
Evaluate the ABG options to find the one representing metabolic alkalosis.
The option with pH 7.50 and HCO3 32 mEq/L represents metabolic alkalosis. The elevated PaCO2 of 48 mm Hg shows the lungs are attempting to compensate by retaining acid (CO2).
Selecting the specific laboratory values that match the deduced clinical condition.

Key Concept

Acid-Base Imbalances: Metabolic Alkalosis from Gastric Loss
Question 720Question →

A client with a complete transection spinal cord injury at the T4 level suddenly reports a severe, pounding headache and blurred vision. Upon evaluation, profuse diaphoresis is noted above the level of the injury alongside a blood pressure reading of 215/115 mm Hg. Arrange the following nursing actions in the priority order they should be performed, from first to last.

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Answer

The correct sequence is to first elevate the head of the bed, loosen restrictive clothing, assess the bladder, examine the bowel, and finally administer antihypertensive medication.
Autonomic dysreflexia is a medical emergency characterized by uncontrolled hypertension in clients with spinal cord injuries at or above T6. The priority sequence follows a strict 'immediate safety first, then treat the cause' approach: rapidly lowering blood pressure via orthostasis (sitting up) is always the immediate first action. This is followed by systematically identifying and removing the offending noxious stimuli, starting from the most external and common (tight clothing, full bladder) to the next most common (bowel impaction). Pharmacological intervention is the final step if mechanical removal of stimuli fails.

Step-by-Step Solution

1
Elevate the head of the bed to a high Fowler's position.
Takes advantage of orthostatic hypotension to lower blood pressure.
The client is experiencing a hypertensive emergency due to autonomic dysreflexia. The most immediate mechanical way to lower blood pressure and prevent stroke is to utilize gravity.
2
Loosen any restrictive clothing or tight devices.
Reduces external skin stimulation.
Tight clothing, tight sheets, or restrictive devices act as noxious sensory stimuli below the level of injury, driving the exaggerated sympathetic response.
3
Assess the urinary drainage system for kinks or bladder distention.
Identifies or rules out the primary cause of autonomic dysreflexia.
A distended bladder is the single most common cause of autonomic dysreflexia. Emptying the bladder often abruptly stops the crisis.
4
Examine the rectum for the presence of a fecal impaction.
Identifies or rules out the secondary cause of autonomic dysreflexia.
If the bladder is not the source, the bowel is the next most likely culprit. This must be checked to remove the noxious stimulus.
5
Administer a rapidly acting intravenous antihypertensive medication.
Pharmacologically lowers the blood pressure.
Medications are used only when conservative measures fail to eliminate the noxious stimuli or if the blood pressure remains critically elevated despite removing the trigger.

Key Concept

Prioritization and Management of Autonomic Dysreflexia
Estimated Time:1m 30s
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