Physiological Integrity

1960 questions

Question 1321Question →

A client diagnosed with bacterial pneumonia is prescribed intravenous ceftriaxone. While completing the admission history, the nurse discovers that the client has a documented history of anaphylaxis following amoxicillin administration. Which action is the priority for the nurse to take?

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Answer: Withhold the prescribed ceftriaxone and contact the healthcare provider immediately.

Answer

Withhold the prescribed ceftriaxone and contact the healthcare provider immediately.
Ceftriaxone is a third-generation cephalosporin. Because cephalosporins and penicillins (like amoxicillin) are both beta-lactam antibiotics, they share a similar chemical structure. Clients with a history of severe allergic reactions (such as anaphylaxis) to penicillins have a significant risk of experiencing a cross-sensitivity reaction to cephalosporins. The safest and most appropriate action is to withhold the dose and consult the prescribing provider for an alternative therapy.

Step-by-Step Solution

1
Analyze the client's medication history and the newly prescribed medication.
The client has an allergy to amoxicillin (a penicillin) and is prescribed ceftriaxone (a cephalosporin).
Identifying potential drug interactions or allergies is a critical pre-administration safety check.
2
Evaluate the relationship between the prescribed medication class and the known allergen.
Penicillins and cephalosporins share a beta-lactam ring structure, creating a risk for cross-sensitivity allergic reactions.
Understanding pharmacological classifications helps predict potential adverse effects.
3
Determine the highest priority nursing action based on the potential risk.
The priority action is to prevent exposure to the allergen by withholding the medication and notifying the provider.
According to the ABCs (Airway, Breathing, Circulation), preventing an anaphylactic reaction takes precedence over administering the medication.

Key Concept

Cross-sensitivity exists between penicillins and cephalosporins, requiring the nurse to withhold the medication and notify the provider to prevent anaphylaxis.
Question 1322Question →

A nurse is providing care for a client who had a right below-the-knee amputation 36 hours ago. The client reports mild discomfort and stiffness in the affected leg. Which nursing action is the most appropriate?

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

Answer

The most appropriate action is to assist the client into a prone position for 20 to 30 minutes, three to four times a day.
Assisting the client into a prone position for 20 to 30 minutes several times a day is the correct intervention. This position actively stretches the flexor muscles of the hip and knee, which is a critical measure to prevent flexion contractures following a lower extremity amputation. Contractures can severely limit mobility and complicate or prevent the future use of a prosthesis.

Step-by-Step Solution

1
Identify the time elapsed since the amputation.
The client is 36 hours post-operative.
Positioning protocols change significantly after the first 24 hours to transition from edema management to contracture prevention.
2
Recognize the primary positioning risk for this client.
Hip and knee flexion contractures are a major risk following a below-the-knee amputation.
Flexion contractures can prevent the successful fitting and use of a prosthetic limb.
3
Determine the correct positioning intervention.
The prone position is indicated.
Lying prone stretches the flexor muscles of the hip and knee, directly counteracting the tendency for contractures to form.

Key Concept

Prevention of flexion contractures post-amputation
Question 1323Question →

A newly admitted adult client is recovering from a prolonged tonic-clonic seizure. The client has a peripheral venous catheter in the right forearm, which is currently infusing a maintenance solution of 5% dextrose in water at 80 mL/hr80\text{ mL/hr}. The nurse must deliver a stat order of intravenous phenytoin. Which procedural approach ensures safe administration of this medication?

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Answer: Pause the primary infusion, flush the catheter thoroughly with normal saline, inject the phenytoin, and follow with another normal saline flush.

Answer

The nurse must pause the dextrose infusion and thoroughly flush the intravenous line with normal saline both before and after administering the phenytoin.
Intravenous phenytoin is chemically incompatible with any solution containing dextrose. If mixed, the medication will immediately precipitate (crystallize). To safely administer this medication through a venous access device that is currently running a dextrose solution, the nurse must temporarily halt the primary infusion. The line must then be flushed aggressively with normal saline to clear out the dextrose. After slowly pushing the phenytoin, the nurse must flush the line a second time with normal saline before resuming the dextrose maintenance fluid. This 'flush-administer-flush' technique ensures the drug never comes into physical contact with the incompatible fluid.

Step-by-Step Solution

1
Analyze the primary intravenous solution currently infusing.
The client is receiving 5% dextrose in water.
Identifying the active maintenance fluid is required to determine medication compatibility prior to any IV push.
2
Recall the pharmacological compatibility profile of intravenous phenytoin.
Phenytoin is highly incompatible with all dextrose-containing solutions.
When phenytoin contacts dextrose, it forms solid microcrystals that can occlude the catheter or cause an embolus.
3
Determine the necessary sequence of actions for safe delivery.
The line must be flushed with normal saline before and after the phenytoin administration.
Normal saline is compatible with phenytoin. The initial flush clears the dextrose from the tubing, and the final flush ensures the medication is fully delivered before the primary dextrose infusion is restarted.

Key Concept

Intravenous Phenytoin Administration and Fluid Compatibility
Question 1324Question →

An intensive care nurse evaluates a critically ill client being treated for severe viral pneumonia. Over the past 30 minutes, the client has become increasingly agitated and disoriented. Current vital signs reveal a heart rate of 126 beats/min, a respiratory rate of 34 breaths/min, and a blood pressure of 98/78 mm Hg. Stat arterial blood gas (ABG) analysis on a non-rebreather mask demonstrates a pH of 7.26, PaCO2PaCO_2 of 64 mm Hg, PaO2PaO_2 of 52 mm Hg, and HCO3−HCO_3^- of 24 mEq/L. What is the most appropriate action by the nurse to mitigate the risk of immediate cardiorespiratory arrest?

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Answer: Assemble the necessary equipment for immediate rapid sequence intubation and mechanical ventilation.

Answer

The nurse must assemble the necessary equipment for immediate rapid sequence intubation and mechanical ventilation.
The correct action is to prepare for immediate intubation and mechanical ventilation. The client's profound hypoxemia (PaO2PaO_2 of 52 mm Hg despite high-flow oxygen via a non-rebreather mask), severe uncompensated respiratory acidosis (pH 7.26, PaCO2PaCO_2 64 mm Hg), and signs of impending shock (narrowing pulse pressure of 20 mm Hg, agitation, tachycardia) indicate acute respiratory failure. Securing the airway and providing mechanical ventilation is the most critical intervention to mitigate the risk of imminent cardiorespiratory arrest.

Step-by-Step Solution

1
Analyze the arterial blood gas (ABG) results.
The ABG reveals uncompensated respiratory acidosis (low pH, high PaCO2PaCO_2, normal HCO3−HCO_3^-) and severe, refractory hypoxemia (PaO2PaO_2 52 mm Hg on a non-rebreather mask).
Accurate ABG interpretation is essential to identify the underlying physiological disturbance causing the client's clinical decline.
2
Evaluate the client's vital signs and neurological status for systemic complications.
The narrowing pulse pressure (20 mm Hg), marked tachycardia, tachypnea, and new-onset agitation indicate impending physiological shock secondary to profound tissue hypoxia.
Recognizing early signs of shock and hypoxia prevents the administration of contraindicated medications, such as sedatives, which would mask symptoms and suppress respiratory drive.
3
Determine the highest priority intervention to reduce the risk of cardiorespiratory arrest.
Immediate airway control and positive pressure ventilation are required.
The client is failing non-invasive oxygenation strategies and is in imminent danger of respiratory collapse. Airway and breathing interventions must take precedence over other actions.

Key Concept

Prioritizing airway management in clients with uncompensated respiratory acidosis and impending shock
Question 1325Question →

A 7272-year-old client with a history of dysphagia is receiving continuous enteral nutrition via a nasogastric tube. The client suddenly exhibits severe shortness of breath, use of accessory muscles, and a pulse oximetry reading of 84%84\% on room air. A stat arterial blood gas (ABG) analysis shows a pH of 7.267.26, PaCO 2_2 of 6464 mm Hg, and HCO 3−_3^- of 2424 mEq/L. The nurse suspects acute pulmonary aspiration. Which of the following immediate interventions should the nurse implement? Select all that apply.

Select all that apply

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Answer: Stop the continuous enteral feeding pump.; Initiate supplemental oxygen therapy to treat hypoxemia.

Answer

The correct actions are to stop the continuous enteral feeding pump and initiate supplemental oxygen therapy.
The client is experiencing an acute respiratory emergency due to suspected aspiration. Immediate independent nursing actions must focus on stopping the source of aspiration by turning off the enteral feeding and treating the severe hypoxemia with supplemental oxygen. These interventions directly address the airway and breathing priorities to prevent further physiological deterioration.

Step-by-Step Solution

1
Identify the clinical emergency from the provided assessment data.
The client has profound hypoxemia (SpO 2_2 84%84\%) and acute respiratory acidosis (pH 7.267.26, PaCO 2_2 6464 mm Hg) likely due to aspiration of enteral feeding.
Recognizing the physiological signs of decompensation is necessary to prioritize life-saving interventions.
2
Determine the immediate priority actions based on the ABCs (Airway, Breathing, Circulation) framework.
The most critical actions are to stop the enteral feeding pump to halt further aspiration (Airway) and apply supplemental oxygen (Breathing).
Airway and breathing interventions take precedence over all other assessments and provider notifications during a respiratory code.
3
Evaluate and eliminate contraindicated or delayed interventions.
Laying the client flat, misinterpreting the ABG as metabolic acidosis, delaying lung auscultation to palpate the abdomen, and waiting for provider orders are all incorrect actions.
These actions worsen the client's physiological condition, represent critical misinterpretations of diagnostic data, or incorrectly delay prioritized care.

Key Concept

Prioritization of immediate life-saving interventions (ABCs) and correct interpretation of diagnostic data during an acute respiratory emergency to reduce the risk of physiological decompensation.
Question 1326Question →

A nurse is caring for a client who is receiving intravenous fluids through a central venous catheter. The client suddenly gasps, reports severe chest pain, and becomes extremely short of breath. The nurse notes a heart rate of 124 beats/min, a blood pressure of 82/50 mm Hg, and auscultates a loud, churning "mill-wheel" murmur over the precordium. Suspecting a venous air embolism, arrange the following nursing actions in the correct priority order.

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Answer

The correct order of actions is to first clamp the central venous catheter, then place the client in the left lateral Trendelenburg position, followed by administering 100% oxygen, activating the rapid response team, and finally documenting the event.
In a suspected venous air embolism, the nurse must prioritize immediate mechanical interventions to prevent cardiac arrest. The absolute first action is to stop the source by clamping the central venous catheter. Immediately after, the client is placed in the left lateral Trendelenburg position (Durant's maneuver) to trap the air in the apex of the right ventricle, preventing pulmonary artery obstruction. Once the air is trapped, administering 100% oxygen addresses hypoxia and creates a nitrogen gradient to shrink the bubble. With the immediate crisis stabilized, the nurse delegates calling for the rapid response team, and finally, documents the event after the situation is fully managed.

Step-by-Step Solution

1
Clamp the central venous catheter.
Halts the influx of air into the venous system.
Stopping the source is the absolute first priority in an iatrogenic air exposure to prevent worsening of the cardiovascular collapse.
2
Place the client in the left lateral Trendelenburg position.
Traps the air embolus in the right ventricle.
This specific positioning (Durant's maneuver) prevents the air bubble from entering the pulmonary artery, which would cause a fatal right ventricular outflow tract obstruction.
3
Administer 100% oxygen via a non-rebreather mask.
Treats hypoxia and shrinks the air bubble.
High-flow oxygen creates a diffusion gradient that washes out nitrogen from the bloodstream, causing the air embolus to decrease in size.
4
Instruct available personnel to activate the rapid response team.
Summons advanced medical support.
The client requires immediate medical evaluation and potential invasive interventions, such as aspiration of the air from the right atrium.
5
Document the critical event, interventions provided, and the client's response.
Creates an accurate legal and clinical medical record.
Thorough documentation must occur only after all emergency life-saving interventions are implemented and the client's immediate crisis is managed.

Key Concept

Management of Venous Air Embolism
Question 1327Question →

A nurse is assessing a client who is receiving continuous intravenous opioid analgesia. The client is difficult to arouse and has a respiratory rate of 8 breaths per minute. The nurse anticipates the client is developing respiratory acidosis. What arterial blood gas (ABG) findings would confirm this complication? Select all that apply.

Select all that apply

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Answer: pH 7.287.28; PaCO2PaCO_2 56 mm Hg

Answer

The ABG findings that confirm respiratory acidosis are a pH of 7.287.28 and a PaCO2PaCO_2 of 56 mm Hg.
Respiratory acidosis is clinically defined by an elevated partial pressure of arterial carbon dioxide (PaCO2PaCO_2 greater than 45 mm Hg) and a decreased blood pH (less than 7.357.35). Opioid-induced central nervous system depression causes hypoventilation, leading to the accumulation of carbon dioxide and subsequent acidemia. The correct findings exactly mirror these physiological shifts.

Step-by-Step Solution

1
Analyze the client's clinical presentation.
The client is experiencing profound hypoventilation (respiratory rate of 8 breaths per minute) due to opioid administration.
Identifying the physiological impact of hypoventilation helps determine the expected acid-base imbalance.
2
Determine the effect of hypoventilation on carbon dioxide levels.
A decreased respiratory rate leads to inadequate exhalation and subsequent retention of carbon dioxide in the blood.
Carbon dioxide acts as an acid in the body, so its retention directly lowers blood pH.
3
Correlate the physiological state with specific ABG parameters.
The retention of carbon dioxide corresponds to a PaCO2PaCO_2 greater than 45 mm Hg, resulting in a pH less than 7.357.35.
These specific laboratory values define uncompensated respiratory acidosis.

Key Concept

Arterial Blood Gas (ABG) Interpretation in Hypoventilation
Question 1328Question →

An adolescent client is brought to the emergency department after ingesting a toxic amount of acetylsalicylic acid (aspirin) 6 hours ago. The client is confused, diaphoretic, and reports tinnitus. Vital signs are: heart rate 124 beats/min, respiratory rate 34 breaths/min and deep, and blood pressure 102/64 mm Hg. Arterial blood gas (ABG) analysis reveals: pH 7.31, PaCO2 24 mm Hg, HCO3 12 mEq/L, and PaO2 96 mm Hg. Which physiological interpretation and corresponding priority action is most appropriate for this client?

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Answer: Partially compensated metabolic acidosis; prepare to administer an intravenous sodium bicarbonate infusion.

Answer

The correct interpretation is partially compensated metabolic acidosis, and the priority action is to prepare an intravenous sodium bicarbonate infusion.
The ABG results demonstrate a partially compensated metabolic acidosis. The pH is acidic (less than 7.35), which matches the low bicarbonate level (metabolic origin). The low carbon dioxide level indicates the respiratory system is attempting to compensate by hyperventilating. In acetylsalicylic acid (aspirin) toxicity, the priority intervention is alkalinizing the blood and urine with intravenous sodium bicarbonate. This treatment converts the toxic salicylate into an ionized form that cannot cross back into the tissues, trapping it in the renal tubules and rapidly accelerating its excretion from the body.

Step-by-Step Solution

1
Analyze the arterial blood gas (ABG) pH value to determine the primary acid-base status.
The pH is 7.31, which is below the normal range of 7.35-7.45, indicating acidemia.
Establishing the pH direction is the first step in identifying the primary physiological disturbance.
2
Evaluate the PaCO2 and HCO3 values to determine the origin of the acidosis.
The HCO3 is low (12 mEq/L), which matches the acidic pH, confirming a metabolic origin. The PaCO2 is also low (24 mm Hg).
Matching the abnormal parameter to the pH direction identifies whether the primary cause is respiratory or metabolic.
3
Determine the level of compensation based on the opposite parameter and the pH.
The low PaCO2 indicates the respiratory system is blowing off acid to compensate, but because the pH (7.31) is not yet back to normal, the condition is only partially compensated.
Assessing the opposite system reveals if physiological adaptation is occurring to restore homeostasis.
4
Identify the primary pharmacological intervention for the specific toxidrome (salicylate poisoning) causing the metabolic acidosis.
Intravenous sodium bicarbonate is required to alkalinize the urine and trap the salicylate ions for rapid renal excretion.
Treating the underlying toxicological cause is essential to reverse the severe, life-threatening metabolic derangement.

Key Concept

In severe salicylate (aspirin) toxicity, clients develop a profound high anion gap metabolic acidosis. The physiological adaptation is compensatory hyperventilation (Kussmaul respirations), and the priority pharmacological intervention is urinary alkalinization using intravenous sodium bicarbonate to trap and excrete the toxin.
Estimated Time:2m 0s
Question 1329Question →

A nurse in the cardiovascular intensive care unit is caring for a client with acute decompensated heart failure. The client weighs 209 lbs209\text{ lbs}.

The client is receiving a continuous intravenous infusion of dobutamine. The standard hospital mixture contains 500 mg500\text{ mg} of dobutamine in 250 mL250\text{ mL} of 5%5\% dextrose in water (D5W). The infusion pump is currently running at 17.1 mL/hr17.1\text{ mL/hr}.

The provider's order reads: 'Titrate dobutamine by 1.5 mcg/kg/min1.5\text{ mcg/kg/min} every 15 minutes15\text{ minutes} to achieve a cardiac index ≥2.2 L/min/m2\geq 2.2\text{ L/min/m}^2.'

The latest hemodynamic assessment reveals a cardiac index of 1.8 L/min/m21.8\text{ L/min/m}^2. The nurse prepares to perform the next titration step according to the protocol.

At what value in mL/hr\text{mL/hr} will the nurse program the infusion pump for the new dose? (Round the final answer to the nearest tenth.)

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Answer: 21.4

Answer

The new infusion pump rate should be set to 21.4 mL/hr21.4\text{ mL/hr}.
To arrive at the correct value, the nurse must first convert the weight to kilograms (95 kg95\text{ kg}) and determine the solution's concentration (2,000 mcg/mL2,000\text{ mcg/mL}). The low cardiac index dictates an upward titration. The required dose increase (1.5 mcg/kg/min1.5\text{ mcg/kg/min}) is multiplied by weight (95 kg95\text{ kg}) and time (60 minutes60\text{ minutes}) to find the hourly dose increase (8,550 mcg/hr8,550\text{ mcg/hr}). Dividing this by the concentration (2,000 mcg/mL2,000\text{ mcg/mL}) yields the rate increase of 4.275 mL/hr4.275\text{ mL/hr}. Adding this to the current baseline rate of 17.1 mL/hr17.1\text{ mL/hr} equals 21.375 mL/hr21.375\text{ mL/hr}, which correctly rounds to 21.4 mL/hr21.4\text{ mL/hr}.

Step-by-Step Solution

1
Convert the client's weight from pounds to kilograms.
209 lbs÷2.2 lbs/kg=95 kg209\text{ lbs} \div 2.2\text{ lbs/kg} = 95\text{ kg}
The medication dosing protocol is based on metric weight (kilograms).
2
Calculate the exact concentration of the dobutamine infusion in mcg/mL\text{mcg/mL}.
500 mg=500,000 mcg500\text{ mg} = 500,000\text{ mcg}. Then, 500,000 mcg÷250 mL=2,000 mcg/mL500,000\text{ mcg} \div 250\text{ mL} = 2,000\text{ mcg/mL}.
Titration orders are in micrograms (mcg), so the medication concentration must match this unit to calculate volume.
3
Determine the necessary clinical intervention based on the current cardiac index.
The current cardiac index is 1.8 L/min/m21.8\text{ L/min/m}^2, which is less than the goal of 2.2 L/min/m22.2\text{ L/min/m}^2. The dose must be increased by the ordered 1.5 mcg/kg/min1.5\text{ mcg/kg/min}.
Nurses must independently assess parameters to decide the direction of the titration before performing the math.
4
Calculate the total dose increase in mcg/min\text{mcg/min} for this specific client.
1.5 mcg/kg/min×95 kg=142.5 mcg/min1.5\text{ mcg/kg/min} \times 95\text{ kg} = 142.5\text{ mcg/min}.
This isolates the exact amount of extra drug the client needs every minute.
5
Convert the per-minute dose increase to a per-hour dose increase.
142.5 mcg/min×60 minutes/hour=8,550 mcg/hr142.5\text{ mcg/min} \times 60\text{ minutes/hour} = 8,550\text{ mcg/hr}.
IV infusion pumps are programmed in hourly rates (mL/hr\text{mL/hr}), so the dose must reflect an hourly timeframe.
6
Calculate the volumetric rate increase (mL/hr\text{mL/hr}) required to deliver the extra 8,550 mcg/hr8,550\text{ mcg/hr}.
8,550 mcg/hr÷2,000 mcg/mL=4.275 mL/hr8,550\text{ mcg/hr} \div 2,000\text{ mcg/mL} = 4.275\text{ mL/hr}.
This translates the needed extra medication into the actual fluid volume the pump will deliver.
7
Add the rate increase to the current running rate and apply rounding rules.
17.1 mL/hr+4.275 mL/hr=21.375 mL/hr17.1\text{ mL/hr} + 4.275\text{ mL/hr} = 21.375\text{ mL/hr}. Rounded to the nearest tenth, this is 21.4 mL/hr21.4\text{ mL/hr}.
The final step combines the current baseline therapy with the newly calculated upward adjustment.

Key Concept

Weight-Based Continuous Infusion Titration and Hemodynamic Interpretation
Estimated Time:3m 0s
Question 1330Question →

An adult client admitted to the medical-surgical unit is currently receiving continuous enteral nutrition through a nasogastric tube. To actively reduce the risk of potential physiological complications associated with this therapy, which intervention is most appropriate for the nurse to implement?

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Answer: Keep the head of the bed raised between 30 and 45 degrees.

Answer

The correct intervention is to keep the head of the bed raised between 30 and 45 degrees to prevent the aspiration of enteral formula.
Keeping the head of the bed raised between 30 and 45 degrees uses gravity to prevent the reflux of gastric contents into the esophagus, thereby significantly reducing the risk of aspiration. Aspiration of enteral formula can lead to severe respiratory complications, such as aspiration pneumonia. This position must be maintained continuously while the feeding is active.

Step-by-Step Solution

1
Identify the primary therapy and its associated risks.
The client is receiving continuous enteral nutrition via a nasogastric tube.
Enteral feeding bypasses the normal swallowing mechanism, significantly increasing the risk of gastric reflux and aspiration of stomach contents into the respiratory tract.
2
Determine the appropriate risk-reduction intervention.
Positioning the client with their upper body elevated is required.
An elevated position uses gravity to help keep gastric contents in the stomach, thereby preventing aspiration pneumonia, which is a severe and potentially life-threatening complication.

Key Concept

Preventing aspiration in clients receiving enteral nutrition requires continuously maintaining the upper body in an elevated position.
Estimated Time:1m 0s
Question 1331Question →

A nurse is managing the care of a client who is receiving continuous total parenteral nutrition (TPN) via a peripherally inserted central catheter (PICC). Which of the following nursing actions are appropriate to include in the client's plan of care? (Select all that apply.)

Select all that apply

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Answer: Obtain capillary blood glucose measurements every 4 to 6 hours.; Replace the TPN infusion bag and intravenous tubing every 24 hours.; Hang a 10% dextrose in water (D10W) infusion if the current TPN bag is empty and the new one is not yet available.

Answer

The correct actions are obtaining capillary blood glucose measurements every 4 to 6 hours, replacing the TPN bag and tubing every 24 hours, and hanging a 10% dextrose in water (D10W) infusion if the TPN is abruptly stopped.
Safe administration of Total Parenteral Nutrition requires strict infection control (changing bags and tubing every 24 hours), vigilant glycemic monitoring (checking blood glucose every 4-6 hours), and prevention of sudden hypoglycemia (keeping D10W available if the TPN runs out).

Step-by-Step Solution

1
Evaluate the risk of hyperglycemia and hypoglycemia associated with high-dextrose TPN solutions.
Identified the need for routine blood glucose monitoring and the use of D10W if the infusion is interrupted.
TPN creates continuous high glucose loads, requiring endogenous insulin adaptation. Stopping it suddenly causes hypoglycemia; running it continuously requires monitoring.
2
Assess infection control protocols for central lines and highly concentrated nutritional fluids.
Identified the need to change the tubing/bag every 24 hours and avoid disconnecting the line during ambulation.
TPN solutions are ideal environments for bacterial and fungal growth.
3
Analyze the safety guidelines regarding TPN line access.
Determined that the TPN lumen must be dedicated exclusively to TPN.
Mixing other medications in the TPN line carries a severe risk of chemical incompatibility and precipitation.

Key Concept

Total Parenteral Nutrition (TPN) Safety and Administration
Estimated Time:1m 30s
Question 1332Question →

A nurse is caring for a client with type 2 diabetes mellitus whose morning blood glucose level is 185 mg/dL185 \text{ mg/dL}. The healthcare provider has prescribed 10 units10 \text{ units} of regular insulin and 20 units20 \text{ units} of NPH insulin to be administered subcutaneously. The nurse is preparing to mix both insulins in a single syringe. Arrange the following steps in the correct sequence for this procedure.

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Answer

The correct sequence is to first roll the NPH vial, inject air into the NPH vial, inject air into the regular insulin vial, withdraw the regular insulin, and finally withdraw the NPH insulin.
The standard sequence for mixing insulins ensures the fast-acting (clear) insulin is not contaminated by the intermediate-acting (cloudy) insulin. The correct mnemonic is often 'Clear before Cloudy'. The process is: mix the cloudy insulin by rolling, inject air into the cloudy vial, inject air into the clear vial, draw from the clear vial, and finally draw from the cloudy vial.

Step-by-Step Solution

1
Roll the NPH vial gently between the palms.
The cloudy suspension is mixed uniformly.
Vigorous shaking causes air bubbles which can lead to inaccurate dosing; rolling mixes the particles safely.
2
Inject 20 units20 \text{ units} of air into the NPH vial, then remove the needle.
The NPH vial is pressurized for later withdrawal.
Air must be injected to prevent a vacuum, but the medication is not drawn yet to prevent contamination.
3
Inject 10 units10 \text{ units} of air into the regular insulin vial.
The regular insulin vial is pressurized.
Prepares the vial for immediate withdrawal of the medication without removing the needle.
4
Invert the vial and withdraw 10 units10 \text{ units} of regular insulin.
The clear insulin is drawn into the syringe.
Drawing the clear (short-acting) insulin first prevents it from being contaminated by the longer-acting insulin.
5
Insert the needle into the NPH vial and withdraw 20 units20 \text{ units}.
The total dose of 30 units30 \text{ units} is drawn into the syringe.
Drawing the cloudy insulin last completes the mixture without risking contamination of the rapid or short-acting insulin vial.

Key Concept

Mixing Clear and Cloudy Insulins
Question 1333Question →

A nurse is caring for a 62-year-old client who is 4 days post-operative following an open colon resection. While the nurse is assisting the client with coughing and deep breathing exercises, the client reports a sudden "popping" sensation in the abdomen. The nurse inspects the surgical site and observes a wound evisceration. Place the following nursing interventions in the correct order of priority to mitigate further physiological risk.

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Answer

The correct sequence is: 1) Remain with the client and call for assistance, 2) Position in low Fowler's with hips and knees flexed, 3) Cover the organs with sterile moistened dressings, 4) Obtain vital signs, 5) Prepare for emergency surgery (IV/NPO).
The priority sequence for wound evisceration follows the principle of immediate physical stabilization. Securing help without leaving the client is paramount. Next, placing the client in low Fowler's with flexed knees instantly reduces abdominal tension, stopping further organ protrusion. Only after this mechanical stabilization should the nurse apply sterile, moist dressings to prevent tissue necrosis. Once the viscera are protected, systemic assessment (vital signs) takes precedence, followed by definitive preparation for emergency surgery.

Step-by-Step Solution

1
Remain with the client and direct ancillary staff to immediately notify the rapid response team and surgical provider.
Emergency assistance is secured without abandoning an acutely unstable client.
An evisceration requires emergency surgical intervention and sterile supplies that the primary nurse cannot safely leave the room to retrieve.
2
Assist the client into a low Fowler's position with the hips and knees flexed.
Intra-abdominal pressure is immediately reduced.
This biomechanical intervention relaxes the abdominal rectus muscles, physically preventing further visceral protrusion from occurring while awaiting supplies.
3
Apply sterile, non-adherent dressings moistened with warm sterile normal saline over the protruding organs.
The eviscerated bowel is protected from necrosis and infection.
Exposed viscera will rapidly dry out and become ischemic if not covered with a warm, sterile, moist environment.
4
Obtain a comprehensive set of vital signs and assess peripheral perfusion for signs of hemorrhagic shock.
Systemic hemodynamic stability is evaluated.
Once the localized threat to the organs is managed, the nurse must assess for signs of systemic decompensation or concealed internal hemorrhage.
5
Verify the patency of large-bore intravenous access and maintain strict nothing-by-mouth (NPO) status.
The client is prepared for an emergent return to the operating room.
Definitive treatment requires surgery; maintaining NPO status prevents aspiration during anesthesia, and IV access ensures fluid resuscitation capabilities.

Key Concept

Management of a surgical evisceration requires immediate prioritization of actions that reduce intra-abdominal pressure and protect exposed viscera from necrosis before conducting systemic assessments.
Estimated Time:2m 0s
Question 1334Question →

A nurse is evaluating a client who sustained a massive anterior wall myocardial infarction 24 hours ago. Which of the following clinical findings indicate the client is developing cardiogenic shock? Select all that apply.

Select all that apply

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Answer: Blood pressure of 86/70 mm Hg; Urine output of 40 mL over the past 3 hours; Cool, clammy skin with delayed capillary refill

Answer

The clinical findings that indicate cardiogenic shock are a blood pressure of 86/70 mm Hg, a urine output of 40 mL over the past 3 hours, and cool, clammy skin with delayed capillary refill.
Cardiogenic shock occurs when the heart's pumping ability is severely compromised, leading to decreased cardiac output and inadequate tissue perfusion. A blood pressure of 86/70 mm Hg demonstrates hypotension with a narrowed pulse pressure (16 mm Hg), reflecting decreased stroke volume and compensatory systemic vasoconstriction. A urine output of 40 mL over 3 hours (approximately 13 mL/hr) indicates severely diminished renal perfusion (oliguria). Cool, clammy skin with delayed capillary refill is a result of the sympathetic nervous system shunting blood away from the periphery to preserve vital organ function.

Step-by-Step Solution

1
Analyze the client's risk factors based on the clinical presentation.
The client experienced a massive anterior wall myocardial infarction, which significantly damages the left ventricle and places the client at high risk for pump failure (cardiogenic shock).
Identifying the underlying etiology helps anticipate the specific pathophysiological changes that will occur if the condition deteriorates.
2
Recall the pathophysiology and compensatory mechanisms associated with cardiogenic shock.
Cardiogenic shock is characterized by a severe drop in cardiac output and tissue perfusion. The body compensates via the sympathetic nervous system by causing profound peripheral vasoconstriction to maintain blood pressure and shunt blood to vital organs.
Understanding the mechanism allows for the logical deduction of expected clinical signs, such as cold skin, narrowed pulse pressure, and decreased end-organ perfusion.
3
Evaluate each option to determine if it aligns with the expected signs of cardiogenic shock.
Hypotension with a narrow pulse pressure, oliguria (poor renal perfusion), and cool/clammy skin are direct results of pump failure and vasoconstriction. Warm extremities suggest vasodilation (distributive shock), and metabolic alkalosis contradicts the expected lactic acidosis.
Systematically filtering the choices prevents the selection of distractors that represent other types of shock or incorrect acid-base imbalances.

Key Concept

Cardiogenic shock manifests with signs of decreased cardiac output and compensatory systemic vasoconstriction, including hypotension with a narrowed pulse pressure, oliguria, cool/clammy skin, and metabolic acidosis.
Question 1335Question →

A nurse is assessing a client who is 4 hours post-operative following a total thyroidectomy. Which of the following clinical observations and assessment findings require immediate intervention by the nurse? Select all that apply.

Select all that apply

Show answer & explanation

Answer: The client demonstrates a high-pitched, harsh sound during inspiration.; The client reports a tingling sensation around the mouth and fingertips.; The client is swallowing frequently and reports a feeling of fullness in the neck.

Answer

The findings requiring immediate intervention are the high-pitched inspiratory sound, the tingling sensation around the mouth and fingertips, and the frequent swallowing with a feeling of neck fullness.
The correct findings represent three severe, rapid-onset complications of a thyroidectomy. A high-pitched, harsh inspiratory sound (stridor) indicates acute airway obstruction due to laryngeal edema or nerve damage. A tingling sensation around the mouth and fingertips (paresthesia) is an early, critical indicator of hypocalcemia resulting from inadvertent parathyroid gland removal or trauma, which can lead to tetany and cardiac dysrhythmias. Frequent swallowing and a feeling of neck fullness strongly suggest an expanding hematoma or active hemorrhage underneath the surgical site, which can quickly compress the trachea and block the airway.

Step-by-Step Solution

1
Analyze the surgical procedure (total thyroidectomy) to anticipate potential acute, life-threatening complications.
Identified risks include airway obstruction (from edema or vocal cord paralysis), hemorrhage/hematoma, and hypocalcemia (from inadvertent parathyroid gland injury).
Anticipating high-risk complications focuses the assessment on findings that indicate physiological decompensation.
2
Evaluate each assessment finding to differentiate between expected post-operative observations and indications of impending emergencies.
Stridor, circumoral paresthesia, and frequent swallowing are abnormal findings signaling severe complications. Hoarseness and the semi-Fowler's position are expected and safe.
Prioritization requires intervening immediately for findings that compromise the airway, breathing, or cardiovascular stability.

Key Concept

Post-thyroidectomy Complication Recognition and Risk Mitigation
Question 1336Question →

A client is recovering in the outpatient endoscopy unit after undergoing an esophagogastroduodenoscopy (EGD) with gastric biopsies. The client received intravenous midazolam and fentanyl for moderate sedation. Which assessment finding represents the highest priority physiological risk that the nurse must report immediately?

Show answer & explanation

Answer: A narrowing pulse pressure, resting tachycardia, and involuntary abdominal guarding.

Answer

The correct answer is the finding of a narrowing pulse pressure, resting tachycardia, and involuntary abdominal guarding.
The correct answer identifies signs of gastric perforation and early hypovolemic shock. A narrowing pulse pressure and tachycardia are compensatory mechanisms for fluid loss or sepsis, while involuntary guarding indicates severe peritoneal irritation. This is a life-threatening emergency requiring immediate provider notification for surgical evaluation.

Step-by-Step Solution

1
Analyze the procedure (EGD with biopsy) to identify potential life-threatening complications.
The most critical risks are gastric perforation (causing peritonitis and hemorrhagic shock) and aspiration.
Understanding procedure-specific risks is essential for focused post-operative monitoring.
2
Evaluate the clinical findings in each option to distinguish between expected post-sedation side effects and critical emergencies.
Mild respiratory acidosis, a sluggish gag reflex, and positional hypoxia are expected or easily reversible effects of sedation and intubation.
The nurse must filter out normal recovery data to identify true pathological changes.
3
Prioritize the finding that indicates a systemic, life-threatening complication.
Narrowing pulse pressure, tachycardia, and guarding indicate an acute surgical abdomen, which is the highest priority.
Gastrointestinal perforation leads to rapid physiological decompensation and requires immediate medical or surgical intervention.

Key Concept

Recognizing early signs of physiological decompensation and procedural complications.
Question 1337Question →

A nurse is evaluating a client who underwent a percutaneous coronary intervention (PCI) via the right femoral artery approach 4 hours ago. The femoral sheath has been removed and hemostasis was achieved. The client now reports a new onset of dull, aching pain in the right flank and lower back. Current vital signs are: blood pressure 96/60 mmHg, heart rate 114 bpm, and respiratory rate 20/min. The puncture site dressing is dry and intact, and the right pedal pulse is +2. Which of the following is the priority action by the nurse?

Show answer & explanation

Answer: Notify the rapid response team and prepare to administer intravenous isotonic fluids.

Answer

Notify the rapid response team and prepare to administer intravenous isotonic fluids.
The client is exhibiting classic signs of a retroperitoneal hemorrhage, a severe complication of femoral artery cannulation. Blood pooling in the retroperitoneal space causes flank and back pain, while the loss of circulating volume leads to tachycardia and hypotension. Because the bleeding is internal, the external dressing remains dry. The priority risk reduction action is to activate the rapid response team to obtain immediate medical assistance and prepare for fluid resuscitation to combat impending hypovolemic shock.

Step-by-Step Solution

1
Analyze the client's symptoms and vital signs.
The client has new right flank/back pain, hypotension (96/60 mmHg), and tachycardia (114 bpm).
These findings must be evaluated in the context of a recent femoral artery puncture.
2
Correlate the findings to potential post-procedure complications.
The combination of flank/back pain with signs of hypovolemia (tachycardia, hypotension) and a dry external puncture site strongly indicates internal bleeding, specifically a retroperitoneal hemorrhage.
Blood leaking from the femoral artery can track backward into the retroperitoneal space, causing back/flank pain and hidden blood loss.
3
Determine the priority risk reduction intervention.
The priority is to manage impending hypovolemic shock by calling for emergency assistance and initiating fluid resuscitation.
Prompt medical intervention and volume replacement are critical to stabilize the client's hemodynamic status and reduce the risk of mortality.

Key Concept

Recognition and immediate management of retroperitoneal hemorrhage following femoral artery instrumentation.
Question 1338Question →

A client is 4 hours post-coronary artery bypass grafting (CABG) surgery with mediastinal and pleural chest tubes in place. The nurse notes that the previously steady dark red mediastinal drainage has abruptly stopped over the last hour. The client has become highly restless. Current vital signs are heart rate 118 bpm, blood pressure 92/76 mmHg, and respiratory rate 22 breaths/min. The latest arterial blood gas (ABG) on 40% FiO2 reveals: pH 7.32, PaCO2 37 mm Hg, PaO2 88 mm Hg, and HCO3 18 mEq/L. Which action should the nurse take FIRST to reduce the risk of imminent mortality?

Show answer & explanation

Answer: Notify the healthcare provider immediately and prepare the client for an emergency echocardiogram and potential chest reopening.

Answer

The priority action is to notify the healthcare provider immediately and prepare the client for an emergency echocardiogram and potential surgical chest reopening to relieve the cardiac tamponade.
The correct action directly addresses the life-threatening emergency of cardiac tamponade. The clinical presentation—abrupt cessation of mediastinal drainage, narrowing pulse pressure, restlessness, and metabolic acidosis—strongly suggests that blood is accumulating in the pericardial sac, compressing the heart. Immediate echocardiography and decompression (via chest reopening or pericardiocentesis) are required to prevent mortality.

Step-by-Step Solution

1
Analyze the chest tube drainage trend.
The abrupt cessation of previously steady mediastinal drainage indicates a high probability of a clotted tube, leading to blood accumulating in the mediastinal or pericardial space.
Recognizing sudden changes in drainage output is critical for early detection of postoperative complications.
2
Evaluate the vital signs for signs of decompensation.
The client has a very narrow pulse pressure (92 - 76 = 16 mmHg) and compensatory tachycardia (118 bpm), which are hallmark signs of cardiac tamponade.
Blood trapped in the pericardial space restricts ventricular filling, decreasing stroke volume and causing a narrow pulse pressure and tachycardia.
3
Interpret the arterial blood gas (ABG) values.
The ABG shows a pH of 7.32 (acidemia) and an HCO3 of 18 mEq/L (low) with a normal PaCO2 (37 mm Hg), indicating uncompensated metabolic acidosis.
Decreased cardiac output from the tamponade leads to tissue hypoperfusion, anaerobic metabolism, and subsequent lactic acidosis.
4
Determine the priority nursing intervention.
The nurse must immediately notify the provider and prepare for life-saving interventions like a bedside echocardiogram and chest reopening.
Cardiac tamponade is an obstructive shock emergency that requires immediate mechanical relief of the pressure around the heart to prevent mortality.

Key Concept

Cardiac tamponade is a life-threatening post-CABG complication indicated by abrupt cessation of mediastinal drainage, narrowing pulse pressure, and signs of shock, requiring immediate surgical or medical decompression.
Question 1339Question →

A nurse is evaluating a client admitted 48 hours ago with severe acute pancreatitis. The client has become increasingly restless and confused. Current assessment findings include:

* Respiratory rate: 34 breaths/min and shallow
* Heart rate: 132 beats/min
* Blood pressure: 78/50 mm Hg
* **Oxygen saturation (SpO2SpO_2):** 84% on 4 L/min via nasal cannula
* Urine output: 10 mL over the last 2 hours
* Arterial Blood Gas (ABG): pH 7.25, PaCO2PaCO_2 58 mm Hg, PaO2PaO_2 52 mm Hg, HCO3−HCO_3^- 24 mEq/L

Which of the following interventions should the nurse anticipate implementing? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Prepare the client for immediate endotracheal intubation.; Initiate a rapid intravenous infusion of an isotonic crystalloid solution.

Answer

The correct interventions are to prepare the client for immediate endotracheal intubation and to initiate a rapid intravenous infusion of an isotonic crystalloid solution.
The client is experiencing Systemic Inflammatory Response Syndrome (SIRS) and Acute Respiratory Distress Syndrome (ARDS), which are life-threatening complications of severe acute pancreatitis. The profound hypoxemia (SpO2SpO_2 84%, PaO2PaO_2 52 mm Hg) and hypercapnia (PaCO2PaCO_2 58 mm Hg) despite supplemental oxygen, combined with altered mental status, indicate acute respiratory failure requiring immediate endotracheal intubation and mechanical ventilation. Simultaneously, the hypotension (78/50 mm Hg), tachycardia, and oliguria signify hypovolemic and distributive shock caused by massive fluid shifts (third-spacing). A rapid infusion of isotonic crystalloid fluids is critical to restore intravascular volume and prevent irreversible organ ischemia.

Step-by-Step Solution

1
Analyze the vital signs and clinical presentation to identify the primary physiological compromises.
The client exhibits signs of distributive/hypovolemic shock (blood pressure 78/50 mm Hg, heart rate 132 beats/min, urine output 10 mL/2 hr) and worsening acute respiratory failure (respiratory rate 34 breaths/min, SpO2SpO_2 84%, confusion).
Acute pancreatitis frequently triggers Systemic Inflammatory Response Syndrome (SIRS), leading to massive fluid shifts (third-spacing) and Acute Respiratory Distress Syndrome (ARDS).
2
Interpret the provided Arterial Blood Gas (ABG) values.
The values show a low pH (7.25), elevated PaCO2PaCO_2 (58 mm Hg), and normal HCO3−HCO_3^- (24 mEq/L), along with severe hypoxemia (PaO2PaO_2 52 mm Hg). This confirms uncompensated respiratory acidosis.
Accurate ABG interpretation ensures the correct physiological derangement is targeted (ventilation vs. metabolic buffering).
3
Determine the highest priority interventions based on the ABCs (Airway, Breathing, Circulation).
Airway and Breathing require endotracheal intubation due to refractory hypoxemia, hypercapnia, and altered mental status. Circulation requires aggressive isotonic fluid resuscitation to restore perfusion.
Life-threatening ABC deficits must be addressed simultaneously in a rapidly deteriorating client.
4
Evaluate the remaining options for contraindications.
Diuretics are contraindicated due to profound shock. Bicarbonate is inappropriate for respiratory acidosis. Abdominal skin assessment is a low priority.
Interventions that worsen the client's hemodynamic instability or delay life-saving care must be actively avoided.

Key Concept

Prioritization in Multi-System Organ Failure
Question 1340Question →

An adult client hospitalized with a deep vein thrombosis is receiving a continuous intravenous infusion of heparin. The healthcare provider prescribes a scheduled dose of intravenous vancomycin to treat a concurrent wound infection. The client currently has a single patent 2020-gauge peripheral venous catheter. Upon checking the facility drug reference, the nurse notes that heparin and vancomycin are physically incompatible at the Y-site. Which action by the nurse is the most appropriate?

Show answer & explanation

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

Answer

The nurse should insert a second peripheral intravenous catheter to administer the vancomycin infusion.
The correct action is to establish a second peripheral intravenous site. Because heparin and vancomycin are physically incompatible, they cannot be mixed in the same line without risking precipitation. Additionally, heparin is a critical continuous infusion with a short half-life; stopping it for the duration of a vancomycin infusion (typically 6060 to 9090 minutes) would cause subtherapeutic anticoagulation levels, placing the client at high risk for clot extension.

Step-by-Step Solution

1
Analyze the clinical scenario and the properties of the prescribed medications.
The client requires both continuous heparin and scheduled vancomycin, but the drug reference confirms they are physically incompatible at the Y-site.
Identifying drug incompatibility is a mandatory first step to prevent adverse patient outcomes during parenteral therapy.
2
Evaluate the clinical risks of pausing the primary continuous infusion.
Heparin has a short half-life; pausing it for the duration of a vancomycin infusion would lead to subtherapeutic anticoagulation levels.
Maintaining continuous therapeutic anticoagulation is the highest priority for a client diagnosed with an active deep vein thrombosis.
3
Determine the safest method to deliver both the continuous drip and the scheduled antibiotic without chemical precipitation.
The nurse must initiate a new, separate vascular access site.
A second peripheral intravenous line allows both the critical continuous infusion and the necessary antibiotic to be administered safely, simultaneously, and independently.

Key Concept

Safe administration of incompatible intravenous medications and management of continuous high-alert infusions
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