Physiological Integrity

1960 questions

Question 341Question →

A nurse is preparing to administer an intermittent bolus enteral feeding to a client via a gastrostomy tube. Place the following nursing actions in the correct chronological order.

Drag items to arrange them in the correct order

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Answer

The correct sequence is: Position the client, measure gastric residual volume, flush with water, administer formula, and perform a final flush before clamping.
Administering a bolus enteral feeding requires a logical sequence prioritizing safety and aspiration prevention. First, the client must be placed in a semi-Fowler's position (30-45 degrees) to enlist gravity in preventing aspiration. Second, the nurse must assess the gastric residual volume to evaluate tolerance of previous feedings and confirm the stomach is not overly full. Third, a pre-flush of 30 mL of water is administered to confirm tube patency and clear the line. Fourth, the prescribed feeding formula is administered. Finally, a post-flush of 30 mL of water is required to clear formula from the tube lumen, preventing bacterial growth and tube occlusion, followed by clamping the tube.

Step-by-Step Solution

1
Position the client with the head of the bed elevated 30 to 45 degrees.
The client is in a semi-Fowler's position.
Elevating the head of the bed utilizes gravity to prevent gastroesophageal reflux and aspiration of stomach contents.
2
Aspirate and measure the gastric residual volume.
Gastric emptying and tolerance are assessed.
Residuals must be checked prior to instilling any fluids to ensure the stomach is not overly distended from delayed emptying.
3
Flush the gastrostomy tube with 30 mL of water.
The tube is cleared and patency is verified.
Flushing verifies that the tube is open and ready to receive the feeding formula.
4
Administer the prescribed volume of enteral feeding formula.
The client receives the nutritional feeding.
The formula is instilled only after verifying safety and patency.
5
Flush the tube with an additional 30 mL of water and clamp the device.
The tube is cleared of formula residue.
Post-feeding flushes prevent the formula from coagulating and occluding the tube lumen.

Key Concept

Safe administration of enteral tube feedings involves strict adherence to sequencing: positioning for aspiration precautions, assessing tolerance, verifying patency, administering the nutrient, and maintaining patency post-feed.
Estimated Time:1m 30s
Question 342Question →

A client receiving parenteral nutrition via a right subclavian central venous access device (CVAD) suddenly reports severe chest pain, shortness of breath, and a feeling of impending doom. The nurse observes that the intravenous tubing has become disconnected from the catheter hub. Which of the following immediate interventions should the nurse implement? (Select all that apply.)

Select all that apply

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Answer: Clamp the central venous catheter immediately.; Position the client on their left side with the head of the bed lower than the feet.; Administer 100% oxygen via a non-rebreather mask.

Answer

The nurse must immediately clamp the central venous catheter, position the client in a left lateral Trendelenburg position, and administer 100% oxygen.
The client is exhibiting classic signs of a venous air embolism, a life-threatening complication of central venous access devices when the system is opened to atmospheric pressure. The immediate priorities are to stop further air entry by clamping the line, trap the existing air in the right atrium by placing the client in the left lateral Trendelenburg position (preventing it from entering the pulmonary artery), and correct hypoxia by administering 100% oxygen.

Step-by-Step Solution

1
Identify the clinical emergency based on the presentation.
The client's sudden chest pain, dyspnea, feeling of impending doom, and the disconnected CVAD hub indicate a high probability of a venous air embolism.
Air can rapidly enter the central circulation through an open central venous catheter because intrathoracic pressure is lower than atmospheric pressure.
2
Stop the source of air entry.
Clamping the catheter prevents any further air from being drawn into the venous system.
Securing the line is the absolute first priority to minimize the total volume of the air embolism.
3
Reposition the client strategically.
Placing the client in a left lateral Trendelenburg position (Durant's maneuver) traps the air in the right atrium and the apex of the right ventricle.
This specific positioning prevents the air bubble from entering the pulmonary artery and blocking right ventricular outflow, which would lead to obstructive shock and cardiac arrest.
4
Support oxygenation and hemodynamics.
Administering 100% oxygen is initiated to treat the resulting hypoxia.
High-concentration oxygen not only treats hypoxemia but also promotes the reabsorption of nitrogen from the air bubble, helping to shrink the embolus over time.

Key Concept

Venous Air Embolism Management in Parenteral Therapies
Question 343Question →

A nurse is caring for a client who returned to the medical-surgical unit one hour ago following a diagnostic cardiac catheterization via the right femoral artery approach. The client reports mild lower back discomfort and requests a change in position. Which of the following positioning interventions is most appropriate for this client?

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Answer: Maintain the client on bed rest with the head of the bed elevated no more than 30 degrees and the right leg kept straight.

Answer

Maintain the client on bed rest with the head of the bed elevated no more than 30 degrees and the right leg kept straight.
Following a cardiac catheterization via the femoral artery, it is critical to keep the affected extremity straight to prevent bleeding and hematoma formation at the puncture site. Clients are typically maintained on strict bed rest for several hours post-procedure. The head of the bed may usually be elevated up to 30 degrees to provide some comfort, such as relieving lower back strain, and to facilitate eating or drinking without causing excessive flexion at the groin.

Step-by-Step Solution

1
Identify the procedure and the anatomical site of vascular access.
The client underwent a cardiac catheterization utilizing the right femoral artery.
The specific location of the arterial puncture dictates the required post-procedure mobility restrictions.
2
Determine the primary physiological risk associated with this specific access site.
The primary immediate risk is arterial hemorrhage or hematoma formation at the femoral access site.
The femoral artery is a major vessel under high pressure, making clot stability essential for hemostasis.
3
Select the positioning intervention that minimizes pressure and flexion on the affected groin area while addressing comfort.
Keeping the leg straight and limiting head elevation to a maximum of 30 degrees prevents harmful hip flexion.
Any significant bending of the hip can stretch or compress the puncture site, disrupting the clot. A 30-degree elevation is safe and helps alleviate lower back discomfort.

Key Concept

Post-procedure positioning for femoral artery access
Question 344Question →

The healthcare team is preparing to perform a bed bath and linen change for a client receiving continuous enteral nutrition via a nasogastric tube. Which action should the registered nurse take to maintain safety during this care?

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Answer: Pause the continuous enteral feeding pump before lowering the head of the bed to reposition.

Answer

The nurse must pause the continuous enteral feeding pump before lowering the head of the bed.
Clients receiving continuous enteral feedings are at a high risk for aspiration. To safely perform procedures that require lowering the head of the bed, such as a complete linen change or lateral turning, the nurse must first pause the feeding pump. The bed should only be lowered after the feeding is stopped, and the head of the bed must be returned to a minimum 30-degree elevation before the feeding is resumed.

Step-by-Step Solution

1
Analyze the current therapy against the physical requirements of the planned care procedure.
The client requires a linen change (which typically requires lowering the bed flat to reposition) while receiving a continuous tube feeding.
Identifying conflicts between ongoing treatments and hygiene care is essential to prevent complications.
2
Determine the primary safety risk associated with the procedure.
Lowering the head of the bed while formula is actively infusing places the client at a severe risk for pulmonary aspiration.
Enteral formula can easily regurgitate up the esophagus and into the airway if gravity is not assisting gastric emptying.
3
Select the appropriate nursing intervention to eliminate this risk.
The continuous feeding must be temporarily paused before the bed is lowered, and only resumed once the client is repositioned with the head elevated appropriately.
Stopping the flow of formula ensures the stomach is not actively filling while the client is supine during the linen change.

Key Concept

Aspiration Precautions and Safe Positioning During Enteral Feeding
Question 345Question →

A nurse is caring for a client who requires a transfusion of packed red blood cells (PRBCs) for symptomatic anemia. The client has a single 1818-gauge peripheral intravenous (IV) catheter, which is currently infusing Lactated Ringer's solution at 75 mL/hr75 \text{ mL/hr}. Which of the following is the most appropriate action by the nurse?

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Answer: Discontinue the Lactated Ringer's infusion, flush the catheter with 0.9%0.9\% sodium chloride, and administer the blood using a dedicated Y-type tubing primed with 0.9%0.9\% sodium chloride.

Answer

Discontinue the Lactated Ringer's infusion, flush the catheter with 0.9% sodium chloride, and administer the blood using a dedicated Y-type tubing primed with 0.9% sodium chloride.
The correct action demonstrates an understanding of IV compatibility and safe blood administration. Packed red blood cells (PRBCs) must only be administered with 0.9%0.9\% sodium chloride (Normal Saline). Because the client has an appropriate 1818-gauge catheter in place, the nurse should stop the incompatible Lactated Ringer's, flush the line thoroughly with Normal Saline to prevent mixing, and then safely infuse the blood product.

Step-by-Step Solution

1
Identify the primary clinical need.
The client requires a PRBC transfusion for symptomatic anemia, making it the priority intervention over the maintenance IV fluid.
Symptomatic anemia requires immediate restoration of oxygen-carrying capacity.
2
Assess IV compatibility.
Lactated Ringer's is identified as incompatible with PRBCs.
The calcium in Lactated Ringer's binds with the citrate in banked blood, which can cause severe clotting in the tubing.
3
Determine the safest administration method.
The nurse must stop the incompatible fluid, clear the line with a compatible fluid (0.9% sodium chloride), and administer the blood.
This prevents mixing of incompatible substances while utilizing the existing, appropriately sized 18-gauge catheter.

Key Concept

Blood Product Compatibility and Administration Safety
Question 346Question →

During shift report on a progressive care unit, a nurse receives handoff for a client recovering from a massive anterior wall myocardial infarction. The previous shift's documented vital signs were: blood pressure 128/74 mm Hg, heart rate 80 beats/min, and respiratory rate 14/min. Upon initial rounds, the nurse observes the client fidgeting in bed. Vital signs are now: blood pressure 104/86 mm Hg, heart rate 118 beats/min, and respiratory rate 24/min. Which of the following conclusions should the nurse draw from this assessment?

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Answer: The client is exhibiting early compensatory mechanisms indicative of impending cardiogenic shock.

Answer

The client is exhibiting early compensatory mechanisms indicative of impending cardiogenic shock.
The correct answer accurately identifies that a narrowing pulse pressure (dropping from 54 mm Hg to 18 mm Hg), unexplained tachycardia, tachypnea, and new-onset restlessness are early, compensatory signs of cardiogenic shock. These physiological changes represent the body's attempt to maintain cardiac output following severe left ventricular damage from the anterior myocardial infarction.

Step-by-Step Solution

1
Calculate the client's current pulse pressure and compare it to the baseline.
Baseline pulse pressure was 54 mm Hg (128 - 74). Current pulse pressure is 18 mm Hg (104 - 86).
A narrowing pulse pressure is a critical early indicator of decreased stroke volume and impending shock.
2
Analyze the other vital sign changes and physical assessment findings.
The heart rate increased from 80 to 118 beats/min, respiratory rate increased from 14 to 24/min, and the client developed new-onset restlessness.
Tachycardia and tachypnea are compensatory mechanisms for decreased cardiac output, while restlessness is an early sign of cerebral hypoxia resulting from poor perfusion.
3
Synthesize the findings with the client's medical history.
The combination of severely narrowed pulse pressure, tachycardia, tachypnea, and altered mental status in a post-myocardial infarction client indicates early cardiogenic shock.
Anterior myocardial infarctions heavily damage the left ventricle, placing the client at high risk for severe pump failure (cardiogenic shock).

Key Concept

Early recognition of cardiogenic shock through subtle vital sign trends, specifically narrowing pulse pressure and compensatory tachycardia.
Question 347Question →

An emergency nurse is evaluating a client with type 1 diabetes mellitus who presents with altered mental status, profound lethargy, and a distinct sweet-smelling breath odor. The client is exhibiting heavily labored respirations with an increased depth at a rate of 3434 breaths per minute. Cardiac monitoring displays sinus tachycardia at 132132 beats per minute, and the non-invasive blood pressure reads 84/4484/44 mm Hg. Laboratory results indicate a capillary blood glucose of 612612 mg/dL, pH\text{pH} of 7.157.15, PaCO2\text{PaCO}_2 of 2323 mm Hg, and HCO3−\text{HCO}_3^- of 1010 mEq/L. Which action should the nurse execute immediately?

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Answer: Commence a rapid intravenous bolus of isotonic saline.

Answer

Commence a rapid intravenous bolus of isotonic saline.
In Diabetic Ketoacidosis (DKA), extreme hyperglycemia causes severe osmotic diuresis, leading to profound dehydration and hypovolemic shock (evidenced by the hypotension and tachycardia). The most critical initial intervention is massive fluid resuscitation with isotonic crystalloids (0.9% sodium chloride) to restore intravascular volume and maintain organ perfusion. Only after fluid resuscitation has begun should insulin therapy be initiated.

Step-by-Step Solution

1
Analyze the clinical presentation and laboratory data.
The combination of extreme hyperglycemia, metabolic acidosis, and Kussmaul respirations confirms Diabetic Ketoacidosis (DKA).
Accurate diagnosis dictates the treatment algorithm.
2
Evaluate the client's vital signs for immediate life threats.
A blood pressure of 84/4484/44 mm Hg and heart rate of 132132 beats/minute indicate severe hypovolemic shock secondary to massive osmotic diuresis.
ABC (Airway, Breathing, Circulation) prioritization requires addressing shock immediately.
3
Determine the optimal sequencing of pharmacological interventions.
Isotonic fluid resuscitation must precede insulin therapy.
Insulin shifts water and potassium intracellularly. Administering it before restoring vascular volume will acutely worsen the circulatory collapse.

Key Concept

Diabetic Ketoacidosis (DKA) Hemodynamic Prioritization
Question 348Question →

A clinical nurse leader is evaluating the care plan for an older adult client who is essentially bedbound due to severe generalized deconditioning and has recently developed episodic urinary incontinence. Which interventions are appropriate for the client's basic care and comfort? Select all that apply.

Select all that apply

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Answer: Use a specialized wedge cushion to float the heels completely off the mattress surface.; Cleanse the perineal area and apply a moisture barrier cream immediately after each incontinent episode.; Reposition the client using a 30-degree lateral tilt alternating side to side.

Answer

The appropriate interventions are using a wedge to float the heels, applying moisture barrier cream after incontinence, and utilizing a 30-degree lateral tilt for repositioning.
Appropriate basic care for a bedbound client requires meticulous attention to skin integrity and circulation. Floating the heels relieves pressure on highly susceptible bony prominences. Applying a moisture barrier cream protects the epidermis from maceration and chemical breakdown caused by urine exposure. The 30-degree lateral tilt is the evidence-based optimal position to relieve pressure on the sacrum and trochanters while minimizing dangerous shear forces.

Step-by-Step Solution

1
Analyze the client's risk factors based on the clinical scenario.
The client is at exceptionally high risk for skin breakdown and pressure injuries due to immobility and moisture from new-onset urinary incontinence.
To identify necessary basic care interventions prioritizing skin protection and circulatory health.
2
Evaluate the positioning and hygiene interventions for safety and efficacy.
Floating the heels, using a 30-degree lateral tilt, and applying barrier cream are safe, evidence-based practices. Placing items in the popliteal space is unsafe as it restricts venous return.
To prevent shear, friction, and deep vein thrombosis.
3
Evaluate the delegation and pathophysiology statements.
Skin assessment cannot be delegated to assistive personnel. Furthermore, new-onset incontinence requires medical investigation as it is pathological, not a normal part of aging.
To ensure safe delegation according to the RN scope of practice and accurate clinical understanding.

Key Concept

Basic Care and Comfort: Immobility and Skin Integrity
Question 349Question →

A nurse is caring for a client with a pulmonary embolism who is receiving a continuous intravenous (IV) infusion of unfractionated heparin through a single-lumen peripheral IV catheter. The healthcare provider prescribes a scheduled dose of IV gentamicin to be infused over 60 minutes60 \text{ minutes}. A pharmacological reference indicates that heparin and gentamicin are physically incompatible at the Y-site. Which action is most appropriate for the nurse to take?

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Answer: Insert a second peripheral intravenous catheter to administer the gentamicin infusion.

Answer

The most appropriate action is to insert a second peripheral intravenous catheter to administer the gentamicin infusion.
The correct action requires the nurse to synthesize two pieces of clinical data: the physical incompatibility of the medications and the pharmacokinetics of heparin. Because the drugs precipitate when mixed, they cannot share a line. Because heparin has a very short half-life (11 to 2 hours2 \text{ hours}) and is being used to treat an acute pulmonary embolism, the infusion cannot be paused for 60 minutes60 \text{ minutes} without the client losing therapeutic anticoagulation. Therefore, starting a second IV line is the only safe and appropriate action.

Step-by-Step Solution

1
Identify the chemical incompatibility between the continuous primary infusion (heparin) and the prescribed secondary infusion (gentamicin).
The nurse recognizes that the two medications cannot be administered through the same intravenous line simultaneously.
Mixing incompatible medications in the same IV line can cause precipitation, which may lead to catheter occlusion or a life-threatening embolism.
2
Evaluate the feasibility of pausing the primary infusion to administer the secondary medication.
The nurse determines that pausing the heparin infusion for 60 minutes60 \text{ minutes} is clinically contraindicated.
Unfractionated heparin has a very short half-life (11 to 2 hours2 \text{ hours}). Interrupting the infusion for an hour will rapidly cause subtherapeutic anticoagulation, placing the client at severe risk for thrombus extension.
3
Determine the safest independent nursing intervention to deliver both prescribed therapies.
The nurse establishes a second peripheral IV access site.
A second dedicated IV line allows both the critical continuous anticoagulant and the required antibiotic to infuse safely and on schedule.

Key Concept

Management of Intravenous Medication Incompatibilities and Continuous Critical Infusions
Question 350Question →

A client admitted with septic shock is receiving a continuous intravenous infusion of norepinephrine through a single 20-gauge peripheral catheter. The healthcare provider prescribes an intermittent intravenous piggyback of ceftriaxone to be administered immediately. The nurse reviews a drug reference guide and notes that ceftriaxone is incompatible with norepinephrine. Which action should the nurse take?

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Answer: Establish a second peripheral intravenous access site to administer the prescribed antibiotic.

Answer

The nurse must establish a second peripheral intravenous access site to safely administer the prescribed antibiotic.
Establishing a second intravenous site is the only appropriate action because it ensures that the life-sustaining continuous vasopressor is not interrupted, the time-sensitive antibiotic is not delayed, and the risk of chemical incompatibility and precipitation in the intravenous line is entirely avoided.

Step-by-Step Solution

1
Identify the incompatibility and the nature of the prescribed medications.
Norepinephrine and ceftriaxone are incompatible and cannot run through the same intravenous line.
Mixing incompatible medications can cause crystallization or precipitation, risking an embolus or phlebitis.
2
Analyze the client's physiological dependence on the current continuous medication.
The client has septic shock and requires continuous norepinephrine to maintain adequate blood pressure and tissue perfusion.
Interrupting a continuous vasopressor, even briefly for a flush and piggyback, can lead to severe hemodynamic instability.
3
Determine the priority regarding the newly prescribed medication.
The client needs the antibiotic immediately to treat the underlying infection causing the septic shock.
Timely administration of antibiotics in sepsis is directly linked to patient survival and cannot be delayed.
4
Select the safest nursing intervention that accommodates both priorities.
A new intravenous site must be established.
A separate line allows both high-priority, incompatible medications to infuse concurrently without risking chemical precipitation or interrupting cardiovascular support.

Key Concept

Pharmacological and Parenteral Therapies
Question 351Question →

A client is recovering on the medical-surgical unit shortly after undergoing an exploratory laparotomy and intestinal resection. To promptly detect and mitigate potential postoperative complications, which interventions should the nurse implement? Select all that apply.

Select all that apply

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Answer: Instruct the client to firmly support the abdominal incision with a pillow when coughing.; Evaluate vital sign trends closely for the presence of a narrowing pulse pressure and mild tachycardia.; Verify that prescribed intermittent intravenous medications are compatible with the primary continuous fluid infusion.

Answer

The appropriate interventions to reduce postoperative risk include instructing the client to splint the incision, evaluating vital signs for early indicators of shock (such as a narrowing pulse pressure and tachycardia), and verifying intravenous medication compatibility prior to administration.
The correct interventions focus on minimizing physiological stress and identifying complications early. Splinting the incision prevents wound dehiscence. Monitoring for a narrowing pulse pressure and tachycardia identifies early hypovolemic shock before severe decompensation occurs. Verifying IV compatibility prevents the dangerous infusion of precipitated medications.

Step-by-Step Solution

1
Analyze the clinical scenario.
The client is in the early postoperative phase after major abdominal surgery.
This specific surgical procedure places the client at high risk for hemorrhage, ileus, wound dehiscence, and respiratory complications.
2
Evaluate each proposed intervention against physiological principles of risk reduction.
Splinting, hemodynamic monitoring, and IV compatibility checks actively reduce physical and pharmacological risks.
These actions directly address vulnerability to wound stress, undiagnosed internal bleeding, and medication administration errors.
3
Identify contraindicated interventions.
Palpating before auscultation, delegating initial wound assessments, and placing the client completely flat are rejected.
These actions violate the standard sequence of abdominal assessment, scope of practice regulations, and proper postoperative biomechanics, thereby increasing client risk.

Key Concept

Postoperative Risk Reduction and Safe Care Environment
Question 352Question →

A nurse is preparing to administer an intravenous (IV) dose of phenytoin 300 mg300\text{ mg} to a client with a seizure disorder. The client has a continuous IV infusion of 5%5\% dextrose in water (D5W) infusing at 75 mL/hr75\text{ mL/hr} through a single peripheral IV catheter. Which of the following is the most appropriate action by the nurse?

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Answer: Stop the D5W infusion, flush the line with 0.9%0.9\% sodium chloride, administer the phenytoin, and flush again with 0.9%0.9\% sodium chloride.

Answer

Stop the D5W infusion, flush the line with 0.9%0.9\% sodium chloride, administer the phenytoin, and flush again with 0.9%0.9\% sodium chloride.
Phenytoin precipitates when mixed with dextrose solutions. To safely administer phenytoin through an IV line infusing 5%5\% dextrose in water (D5W), the nurse must first pause the continuous infusion, flush the line with a compatible solution such as 0.9%0.9\% sodium chloride (normal saline), administer the medication at the appropriate rate, and then flush the line again with normal saline before restarting the primary infusion.

Step-by-Step Solution

1
Identify the compatibility of the prescribed medication (phenytoin) with the current continuous infusion (D5W).
Phenytoin is highly incompatible with dextrose-containing solutions and will precipitate.
To prevent a potentially life-threatening chemical reaction and embolism in the IV line.
2
Determine the correct procedure for administering an IV push medication through an incompatible continuous IV line.
The continuous infusion must be paused, and the line must be flushed with a compatible solution (0.9%0.9\% sodium chloride) before and after medication administration.
This clears the tubing of the incompatible fluid and ensures safe delivery of the medication to the client.
3
Evaluate the appropriate rate of administration for IV phenytoin.
Phenytoin must be administered slowly, not exceeding 50 mg/min50\text{ mg/min}.
Rapid administration of phenytoin can cause severe cardiovascular collapse, including hypotension and bradycardia.

Key Concept

Safe administration of intravenous phenytoin (incompatibility with dextrose and rate limits)
Estimated Time:1m 30s
Question 353Question →

A nurse is assessing a client who has experienced severe vomiting and diarrhea for the past 3 days. Which assessment findings indicate the client has developed early compensatory hypovolemic shock? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Narrowing of the pulse pressure to 28 mm Hg; New onset of restlessness and apprehension; Respiratory rate increasing to 28 breaths per minute

Answer

The correct findings that indicate early compensatory shock are the narrowing of the pulse pressure, new onset of restlessness and apprehension, and an increased respiratory rate.
The compensatory phase of shock is an early stage where the body attempts to maintain cardiac output and tissue perfusion despite volume loss. The sympathetic nervous system stimulates peripheral vasoconstriction, which causes a narrowing pulse pressure (a smaller difference between systolic and diastolic blood pressure). It also triggers tachypnea (an increased respiratory rate) to improve oxygenation, which typically results in a mild respiratory alkalosis. Additionally, slight cerebral hypoxia and sympathetic stimulation cause early neurological changes such as restlessness, anxiety, and apprehension.

Step-by-Step Solution

1
Analyze the client's clinical presentation.
The client has a history of severe fluid loss (vomiting and diarrhea), placing them at high risk for hypovolemic shock.
Identifying the risk factors helps anticipate expected physiological changes.
2
Recall the physiological changes during the compensatory phase of shock.
The body activates the sympathetic nervous system, leading to vasoconstriction, increased heart rate, and increased respiratory rate to maintain systemic perfusion.
Understanding the pathophysiology of compensatory shock is required to accurately identify its early signs.
3
Evaluate each option against the signs of early compensatory shock.
Narrowing pulse pressure, restlessness, and tachypnea are early signs. Severe hypotension and lethargy are late signs. Respiratory acidosis is incorrect as early shock causes respiratory alkalosis.
Differentiating between early and late signs of shock ensures accurate assessment and prevents misinterpretation of diagnostic values.

Key Concept

Early compensatory mechanisms of hypovolemic shock
Question 354Question →

A nurse is assessing a 45-year-old client who is 6 hours post-operative following a total thyroidectomy for Graves' disease. Which of the following clinical findings indicate a developing complication that requires IMMEDIATE intervention? Select all that apply.

Select all that apply

Show answer & explanation

Answer: The client reports a tingling sensation around their mouth and in their fingertips.; The client exhibits high-pitched, harsh respiratory sounds during inspiration.; The client's heart rate is 126 beats/min with an oral temperature of 39.2°C (102.5°F).

Answer

The findings requiring immediate intervention are circumoral tingling (indicating hypocalcemia), high-pitched inspiratory sounds (indicating airway obstruction), and marked tachycardia with hyperthermia (indicating thyroid storm).
Following a total thyroidectomy, the nurse must monitor for three critical complications: parathyroid injury leading to hypocalcemia (evidenced by tingling and paresthesia), airway obstruction from edema or bleeding (evidenced by stridor), and thyrotoxic crisis (evidenced by severe tachycardia and high fever). Identifying these signs early allows for immediate life-saving interventions.

Step-by-Step Solution

1
Analyze the client's surgical procedure (total thyroidectomy) and history (Graves' disease) to identify high-risk post-operative complications.
The primary life-threatening risks are airway compromise (from hemorrhage or edema), hypocalcemia (from parathyroid injury), and thyroid storm (exacerbated by Graves' disease history).
Anticipating procedure-specific risks is essential for distinguishing between expected recovery trajectories and physiological decompensation.
2
Evaluate each assessment finding against the identified risks and expected baseline clinical data.
Tingling indicates dangerously low calcium levels; stridor indicates a compromised airway; extreme tachycardia and fever indicate a thyroid storm. The ABG, semi-Fowler's positioning, and mild pain are all normal or therapeutic.
Critical thinking requires the nurse to prioritize acute, life-threatening abnormalities over expected post-operative symptoms and normal diagnostic results.

Key Concept

Post-thyroidectomy complications and physiological risk reduction
Question 355Question →

A client who weighs 165 lb165\text{ lb} is experiencing prolonged seizure activity. The healthcare provider prescribes an intravenous (IV) loading dose of phenytoin at 15 mg/kg15\text{ mg/kg}. To prevent severe hypotension and cardiac dysrhythmias, institutional policy dictates that IV phenytoin must not be administered faster than 50 mg/min50\text{ mg/min}.

What is the minimum time, in minutes, required to safely infuse this loading dose? Record your answer using one decimal place.

Show answer & explanation

Answer: 22.5

Answer

22.5
The calculation requires a sequential three-step dimensional analysis: first converting the patient's weight to kilograms (165÷2.2=75 kg165 \div 2.2 = 75\text{ kg}), then calculating the total dose required (75×15=1125 mg75 \times 15 = 1125\text{ mg}), and finally determining the time required to administer that dose at the maximum safe rate (1125÷50=22.5 minutes1125 \div 50 = 22.5\text{ minutes}). Administering the medication any faster would risk severe hypotension and arrhythmias.

Step-by-Step Solution

1
Convert the client's weight from pounds to kilograms.
165 lb÷2.2 lb/kg=75 kg165\text{ lb} \div 2.2\text{ lb/kg} = 75\text{ kg}
The prescribed dose is weight-based in kilograms, so an accurate conversion is required first.
2
Calculate the total prescribed loading dose in milligrams.
75 kg×15 mg/kg=1125 mg75\text{ kg} \times 15\text{ mg/kg} = 1125\text{ mg}
The total amount of medication must be known to determine how long the infusion will take.
3
Calculate the minimum infusion time based on the maximum safe rate of 50 mg/min50\text{ mg/min}.
1125 mg÷50 mg/min=22.5 minutes1125\text{ mg} \div 50\text{ mg/min} = 22.5\text{ minutes}
Phenytoin administration must not exceed 50 mg/min50\text{ mg/min} to prevent cardiovascular toxicity. Dividing the total dose by the maximum rate provides the shortest allowable infusion time.

Key Concept

Safe administration of intravenous phenytoin requires accurate weight-based dosing and strict adherence to maximum infusion rates to prevent life-threatening cardiovascular side effects.
Question 356Question →

A nurse is monitoring a client who is 48 hours post-operative following an emergency bowel resection for a perforated diverticulum. The client has become increasingly restless over the past two hours. Which of the following assessment findings should the nurse identify as early (hyperdynamic) indicators of septic shock? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Respiratory rate of 28 breaths/min with a PaCO2PaCO_2 of 30 mm Hg; Warm, flushed skin with bounding peripheral pulses; Core body temperature of 38.8°C (101.8°F)

Answer

The early indicators of septic shock are a respiratory rate of 28 breaths/min with a low PaCO2PaCO_2, warm and flushed skin with bounding pulses, and an elevated core body temperature.
In the early (hyperdynamic or 'warm') phase of septic shock, endotoxins and inflammatory mediators cause massive systemic vasodilation. This leads to warm, flushed skin and bounding peripheral pulses as the heart compensates with an increased cardiac output. Hyperthermia is a hallmark of the systemic inflammatory response. Additionally, clients typically hyperventilate early in the process to meet increased metabolic demands, which blows off carbon dioxide, resulting in a low PaCO2PaCO_2 and a primary respiratory alkalosis.

Step-by-Step Solution

1
Analyze the pathophysiology of early septic shock.
Recognize that early septic shock (the warm phase) is characterized by massive systemic vasodilation and a compensatory hyperdynamic cardiovascular state.
This physiological adaptation differentiates early septic shock from other forms of shock (like cardiogenic or hypovolemic), which initially present with severe vasoconstriction.
2
Evaluate the respiratory and ABG parameters.
Identify that an elevated respiratory rate and a decreased PaCO2PaCO_2 (respiratory alkalosis) are early compensatory responses to systemic inflammation and fever.
Hyperventilation occurs early in the disease process before tissue hypoxemia is severe enough to cause anaerobic metabolism and lactic acidosis.
3
Evaluate the hemodynamic and peripheral assessment findings.
Identify that warm, flushed skin and bounding pulses result from profound vasodilation.
The body attempts to maintain cardiac output through decreased systemic vascular resistance, which is a hallmark of distributive shock.

Key Concept

Early (Hyperdynamic) Septic Shock Pathophysiology
Question 357Question →

An older adult client is being monitored in the surgical intensive care unit following an open abdominal aortic aneurysm repair. Over the past hour, the client's urine output has dropped to 15 mL15\text{ mL}. Current vital signs reveal a blood pressure of 86/52 mm Hg86/52\text{ mm Hg}, a heart rate of 122 beats/minute122\text{ beats/minute}, and a respiratory rate of 26 breaths/minute26\text{ breaths/minute}. Recent arterial blood gas results show a pH of 7.317.31, a PaCO2 of 34 mm Hg34\text{ mm Hg}, and an HCO3 of 15 mEq/L15\text{ mEq/L}. Which intervention should the nurse implement first?

Show answer & explanation

Answer: Administer a prescribed rapid isotonic intravenous fluid bolus.

Answer

Administer a prescribed rapid isotonic intravenous fluid bolus.
The client is exhibiting clear signs of hypovolemic shock (hypotension, tachycardia, oliguria) and uncompensated metabolic acidosis (low pH, normal-to-low PaCO2, low HCO3), which likely result from tissue hypoperfusion and subsequent lactic acid buildup following major vascular surgery. Administering an isotonic fluid bolus is the priority intervention because it directly replenishes intravascular volume, improves cardiac output, restores tissue perfusion, and resolves the root cause of the acidosis.

Step-by-Step Solution

1
Analyze the vital signs and urine output.
The client has hypotension, tachycardia, and oliguria.
These findings are classic indicators of decreased cardiac output and hypoperfusion (shock).
2
Interpret the arterial blood gas (ABG) results.
The ABG indicates uncompensated metabolic acidosis.
A pH below 7.357.35 and an HCO3 below 22 mEq/L22\text{ mEq/L} confirm metabolic acidosis, which is caused by lactic acid accumulation during tissue hypoperfusion.
3
Prioritize nursing interventions based on the ABCs (Airway, Breathing, Circulation).
Circulatory support is the immediate priority.
Restoring intravascular volume is critical to reversing hypovolemic shock, restoring tissue perfusion, and correcting the metabolic acidosis.

Key Concept

Early recognition and acute management of hypovolemic shock and metabolic acidosis
Question 358Question →

A client receiving a packed red blood cell (PRBC) transfusion suddenly reports severe lower back pain, chills, and shortness of breath. Suspecting an acute hemolytic transfusion reaction, arrange the following nursing actions in the correct priority order to mitigate further risk to the client.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct sequence is to first stop the transfusion, then maintain IV access with normal saline using new tubing, followed by assessing the client, notifying the provider, and finally sending the equipment to the blood bank.
In any severe adverse reaction to a therapeutic infusion, the immediate priority is to stop the causative agent. Once stopped, IV access must be preserved for emergency management by initiating normal saline with entirely new tubing, ensuring no residual blood is flushed into the patient. Assessment follows to gauge the patient's stability, which dictates the crucial clinical data provided when notifying the healthcare provider. Finally, institutional protocols for laboratory analysis (sending the bag and tubing) are completed once the client is stabilized.

Step-by-Step Solution

1
Stop the transfusion immediately.
Halt of incompatible blood administration.
Limits the amount of antigen entering the body, minimizing the severity of the hemolytic reaction.
2
Change the IV tubing and run normal saline.
Patent IV line established without administering residual blood.
Provides venous access for emergency resuscitative drugs while preventing further administration of the incompatible blood trapped in the old tubing.
3
Assess the client's vital signs.
Baseline physiological data obtained.
Determines the extent of systemic compromise (e.g., shock, respiratory distress) to provide accurate information to the healthcare provider.
4
Notify the healthcare provider and blood bank.
Medical team activated.
Collaborative care is initiated for definitive pharmacological treatment, and institutional adverse reaction protocols are engaged.
5
Send equipment to the laboratory.
Evidence collected and transported.
Essential for determining the exact mismatch (retyping and crossmatching) and preventing future occurrences.

Key Concept

Management of Acute Hemolytic Transfusion Reactions
Question 359Question →

An 82-year-old client with a long history of severe chronic obstructive pulmonary disease (COPD) is brought to the emergency department for worsening shortness of breath and a productive cough. Which assessment findings should indicate to the nurse that the client is experiencing acute hypercapnic respiratory failure rather than expected chronic baseline changes? (Select all that apply)

Select all that apply

Show answer & explanation

Answer: Arterial blood gas values revealing a pH of 7.25, PaCO2 of 78 mm Hg, and PaO2 of 55 mm Hg; A sudden decrease in respiratory effort and a drop in respiratory rate from 36 to 12 breaths per minute; Progressive somnolence and an inability to remain awake to answer questions

Answer

The findings indicating acute hypercapnic respiratory failure are an uncompensated respiratory acidosis (pH 7.25, PaCO2 78), a sudden drop in respiratory rate (indicating muscle fatigue), and progressive somnolence (indicating CO2 narcosis).
Acute hypercapnic respiratory failure in a client with COPD is characterized by the inability to maintain adequate alveolar ventilation, leading to a sudden, uncompensated rise in arterial carbon dioxide. This manifests biochemically as acute respiratory acidosis (pH < 7.35 and elevated PaCO2). Clinically, the rising CO2 levels cross the blood-brain barrier, causing central nervous system depression known as CO2 narcosis (somnolence, lethargy, coma). Additionally, a sudden decrease in respiratory rate in a previously tachypneic client indicates severe respiratory muscle fatigue and impending cardiopulmonary arrest.

Step-by-Step Solution

1
Differentiate between acute respiratory failure and chronic COPD baseline parameters.
Identify that chronic COPD clients typically live in a state of compensated respiratory acidosis with mild hypoxemia, while acute failure presents with uncompensated acidosis and new neurological or physical deterioration.
Understanding the baseline helps prevent overtreating chronic conditions or missing subtle signs of acute decompensation.
2
Evaluate the arterial blood gas (ABG) findings.
The ABG with a pH of 7.25 and PaCO2 of 78 mm Hg shows acute acidemia. The ABG with a pH of 7.36 and high HCO3- shows chronic compensation.
Acute retention of CO2 drops the pH below normal (7.35-7.45), indicating a failure of alveolar ventilation.
3
Assess the clinical manifestations for signs of impending failure.
A sudden decrease in respiratory rate in a distressed client and new-onset somnolence indicate respiratory muscle exhaustion and CO2 narcosis.
Tachypnea is the initial compensatory response to hypoxia and hypercapnia; a sudden drop without clinical improvement is an ominous sign of impending cardiopulmonary arrest.

Key Concept

Recognizing the physiological shift from chronic compensated COPD to acute hypercapnic respiratory failure.
Question 360Question →

A nurse is caring for an adult client who has a serum potassium level of 2.8 mEq/L2.8 \text{ mEq/L}. The healthcare provider prescribes 40 mEq40 \text{ mEq} of intravenous potassium chloride (KCl) diluted in 100 mL100 \text{ mL} of 0.9%0.9\% sodium chloride to be infused over 30 minutes30 \text{ minutes} via a peripheral venous catheter. Which of the following is the priority nursing action?

Show answer & explanation

Answer: Clarify the prescription with the healthcare provider because the infusion rate exceeds safe administration limits.

Answer

The nurse must withhold the medication and clarify the prescription with the healthcare provider because the prescribed rate is dangerously fast.
Intravenous potassium chloride is a high-alert medication that must be administered slowly and carefully to prevent fatal cardiac arrhythmias. The maximum recommended safe infusion rate for a peripheral line is typically 10 mEq/hr10 \text{ mEq/hr} (and generally up to 20 mEq/hr20 \text{ mEq/hr} for a central line with continuous cardiac monitoring). The prescribed rate of 40 mEq40 \text{ mEq} over 30 minutes30 \text{ minutes} equates to an hourly rate of 80 mEq/hr80 \text{ mEq/hr}, which is extremely dangerous and potentially lethal. The absolute priority is to withhold the medication and contact the prescribing provider to clarify and correct the prescription.

Step-by-Step Solution

1
Analyze the prescribed medication dose and rate parameters.
The prescription is for 40 mEq40 \text{ mEq} to be infused over 30 minutes30 \text{ minutes}, which equals an hourly rate of 80 mEq/hr80 \text{ mEq/hr}.
Calculating the effective hourly rate is necessary to compare against safety guidelines for high-alert medications.
2
Compare the calculated rate against safe administration guidelines for intravenous potassium.
The calculated rate (80 mEq/hr80 \text{ mEq/hr}) far exceeds the maximum safe peripheral limit of 10 mEq/hr10 \text{ mEq/hr}.
Exceeding safety limits for intravenous potassium places the client at severe risk for life-threatening cardiac arrhythmias.
3
Determine the priority nursing intervention.
The nurse must stop the administration process and contact the provider to intervene on the unsafe prescription.
Patient safety is the highest priority, superseding routine pre-administration assessments or carrying out orders as written.

Key Concept

Safe Administration of Intravenous Potassium
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