Physiological Integrity

1960 questions

Question 761Question →

A young adult client is being monitored on the orthopedic unit 24 hours after sustaining a closed comminuted fracture of the right femur. The client abruptly becomes intensely restless and confused, with a respiratory rate of 34 breaths per minute. Upon physical assessment, the nurse observes a new onset of petechiae over the client's anterior chest and axillae. Which of the following actions is the nurse's priority?

Show answer & explanation

Answer: Administer high-flow supplemental oxygen via a non-rebreather mask.

Answer

Administer high-flow supplemental oxygen via a non-rebreather mask.
The correct answer addresses the most immediate life-threatening consequence of Fat Embolism Syndrome: profound hypoxemia. The classic triad of FES includes hypoxemia, neurological abnormalities, and a petechial rash. According to the ABCs of prioritization, optimizing oxygenation with a non-rebreather mask is the initial and most critical nursing action to prevent respiratory arrest.

Step-by-Step Solution

1
Analyze the client's clinical presentation and recent history.
The client has a long bone fracture, new-onset restlessness, tachypnea (RR 34), and petechiae on the chest.
Identifying this specific cluster of symptoms is required to diagnose Fat Embolism Syndrome (FES) rather than a generalized complication like hemorrhagic shock.
2
Determine the physiological priority based on the diagnosis.
The primary threat to life in FES is severe hypoxemia leading to acute respiratory failure.
Applying the ABCs (Airway, Breathing, Circulation) framework dictates that respiratory compromise must be addressed before circulation or further diagnostic testing.
3
Select the most appropriate immediate intervention.
Applying high-flow oxygen via a non-rebreather mask is the critical first action.
Supplemental oxygen directly treats the life-threatening hypoxia before other supportive therapies or assessments are initiated.

Key Concept

Fat Embolism Syndrome (FES) Recognition and Prioritization
Estimated Time:1m 30s
Question 762Question →

A client recovering from an orthopedic procedure is receiving intravenous morphine via a patient-controlled analgesia (PCA) device. Upon entering the room, the nurse observes that the client is somnolent, difficult to awaken, and has shallow respirations at a rate of 8 breaths per minute. Which of the following arterial blood gas (ABG) values and clinical manifestations should the nurse anticipate? Select all that apply.

Select all that apply

Show answer & explanation

Answer: pH of 7.27; PaCO2PaCO_2 of 62 mm Hg; Lethargy and dull headache

Answer

The expected findings are a pH of 7.27, a PaCO2PaCO_2 of 62 mm Hg, and lethargy with a dull headache.
The client's hypoventilation (8 breaths/min) caused by opiate administration results in acute carbon dioxide retention. This creates uncompensated respiratory acidosis, characterized by a low pH, an elevated PaCO2PaCO_2, and normal bicarbonate levels. Systemically, hypercapnia causes cerebral vasodilation, which presents as lethargy and headaches.

Step-by-Step Solution

1
Analyze the client's clinical presentation.
The client is somnolent with a respiratory rate of 8 breaths/min due to morphine administration.
Identifying severe hypoventilation is the critical first step to determining the resulting acid-base imbalance.
2
Determine the primary acid-base disturbance.
Hypoventilation directly leads to acute respiratory acidosis.
A decreased respiratory rate causes carbon dioxide to be retained in the blood rather than exhaled.
3
Predict the corresponding ABG values.
Expect a decreased pH (< 7.35), elevated PaCO2PaCO_2 (> 45 mm Hg), and normal HCO3−HCO_3^- (22-26 mEq/L).
Acute retention of CO2CO_2 drops the pH immediately, while the kidneys have not yet had time (48-72 hours) to initiate metabolic compensation by retaining bicarbonate.
4
Identify the physiological manifestations of the imbalance.
Expect lethargy and headache.
Excess CO2CO_2 acts as a potent cerebral vasodilator, increasing intracranial blood volume and causing neurological depression.

Key Concept

Uncompensated Acute Respiratory Acidosis
Question 763Question →

A nurse evaluates a client admitted with community-acquired pneumonia and a comorbidity of heart failure. The client is receiving continuous oxygen therapy at 3 L/min3\text{ L/min} via nasal cannula. Over the past hour, the client has become increasingly restless with a respiratory rate of 32 breaths/min32\text{ breaths/min}. Arterial blood gas analysis reveals a pH value of 7.527.52, a PaCO2PaCO_2 of 28 mm Hg28\text{ mm Hg}, a PaO2PaO_2 of 58 mm Hg58\text{ mm Hg}, and a bicarbonate level of 24 mEq/L24\text{ mEq/L}. Which action should the nurse take first?

Show answer & explanation

Answer: Apply a non-rebreather mask and notify the rapid response team.

Answer

The highest priority action is to apply a non-rebreather mask and immediately alert the rapid response team to aggressively manage the refractory hypoxemia.
The client's laboratory parameters indicate severe hypoxemia (PaO2PaO_2 less than 60 mm Hg60\text{ mm Hg}). The extreme tachypnea (causing uncompensated respiratory alkalosis) and restlessness are direct physiological adaptations attempting to correct the oxygen deficit. The most critical intervention is to treat the root cause by providing high-concentration oxygen via a non-rebreather mask and immediately activating the rapid response team to prevent impending respiratory failure.

Step-by-Step Solution

1
Analyze the assessment data and arterial blood gas results.
The findings reveal severe hypoxemia (PaO2PaO_2 of 58 mm Hg58\text{ mm Hg}) occurring despite supplemental oxygen therapy.
Identifying the primary physiological disturbance is the first step in clinical judgment.
2
Interpret the client's presenting symptoms and acid-base imbalance in context.
The tachypnea, resulting respiratory alkalosis, and restlessness are direct physiological compensatory responses to profound tissue hypoxia.
Distinguishing between a primary disease process and a secondary compensatory mechanism ensures interventions target the root cause rather than the symptoms.
3
Determine the most critical priority based on the ABCs (Airway, Breathing, Circulation).
The underlying cause of the deterioration is a failure in oxygenation, dictating that immediate escalation of oxygen delivery and emergency medical support are paramount.
Failing to correct profound hypoxemia will rapidly lead to respiratory failure and cardiac arrest.

Key Concept

Physiological Adaptation to Hypoxemia and Prioritization
Estimated Time:1m 30s
Question 764Question →

An adult client who underwent a percutaneous liver biopsy three hours ago is being monitored on the medical-surgical unit. The nurse compares the client's current assessment findings with the baseline data obtained immediately upon arrival to the unit.

Assessment ParameterBaseline (Arrival)Current (3 Hours Post-Biopsy)
NeurologicalAwake and alertRestless and anxious
SkinWarm and dryCool and pale
Blood Pressure134/78 mm Hg114/92 mm Hg
Heart Rate74 beats/min112 beats/min
Respiratory Rate14 breaths/min24 breaths/min
Oxygen Saturation98% on room air94% on room air

Based on these findings, which of the following is the most accurate interpretation of the client's condition?

Show answer & explanation

Answer: The client is exhibiting early compensatory signs of hemorrhagic shock, as evidenced by the narrowed pulse pressure and restlessness.

Answer

The client is exhibiting early compensatory signs of hemorrhagic shock, as evidenced by the narrowed pulse pressure and restlessness.
The client's assessment reveals a significantly narrowed pulse pressure (from 56 mm Hg to 22 mm Hg), mild tachycardia, tachypnea, and cool, pale skin. Following a highly vascular procedure like a percutaneous liver biopsy, these are definitive indicators of the compensatory stage of hemorrhagic shock. The body activates the sympathetic nervous system to maintain cardiac output and perfuse vital organs through systemic vasoconstriction (which increases diastolic pressure, narrows the pulse pressure, and cools the skin) and an increased heart rate. Restlessness is an early neurological indicator of decreased cerebral blood flow. Identifying these subtle trends is critical to intervene before the client progresses to decompensated, hypotensive shock.

Step-by-Step Solution

1
Analyze the baseline and current vital signs to identify critical hemodynamic trends.
The pulse pressure has significantly narrowed from 56 mm Hg to 22 mm Hg. The heart rate increased by 38 bpm, and the respiratory rate increased by 10 breaths/min.
Calculating the pulse pressure is essential for detecting the subtle, early physiological changes of shock before profound hypotension occurs.
2
Evaluate the physical assessment findings in the context of the recent invasive procedure.
The client had a liver biopsy (a procedure with a high bleeding risk) and has transitioned from having warm, dry skin to cool, pale skin, alongside new-onset restlessness.
These assessment changes indicate activation of the sympathetic nervous system, peripheral vasoconstriction, and decreased cerebral perfusion.
3
Synthesize the data to determine the most accurate clinical interpretation and priority.
The combination of a narrowed pulse pressure, tachycardia, peripheral vasoconstriction, and altered mentation in a high-risk postoperative client points directly to early compensatory hemorrhagic shock.
Accurate interpretation prevents the dangerous error of dismissing critical deterioration as normal postoperative pain, anxiety, or primary hyperventilation.

Key Concept

Early Recognition of Compensatory Shock
Question 765Question →

A nurse is caring for a client who is 2 hours post-procedure following a right femoral cardiac catheterization. The client suddenly reports severe right groin pain. Upon inspection, the nurse notes a rapidly expanding, firm swelling at the catheter insertion site and a heart rate of 118 beats/minute. Which action should the nurse take first?

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Answer: Apply firm, continuous manual pressure directly over the femoral insertion site.

Answer

Apply firm, continuous manual pressure directly over the femoral insertion site.
The client's presentation of severe groin pain and a rapidly expanding swelling indicates a developing hematoma from active arterial bleeding at the femoral access site. In an acute bleeding scenario, the nurse's immediate priority is to address Circulation by applying firm, direct pressure to the site to achieve hemostasis and prevent hypovolemic shock.

Step-by-Step Solution

1
Assess the clinical findings presented in the scenario.
The client is experiencing severe groin pain, a rapidly expanding firm swelling at the insertion site, and tachycardia.
Recognizing the signs of a specific post-procedure complication is necessary before determining the appropriate intervention.
2
Identify the underlying physiological threat.
The findings are classic indicators of a developing hematoma caused by active arterial bleeding.
Arterial hemorrhage can quickly lead to severe hypovolemia and shock if not immediately controlled.
3
Determine the priority intervention using the ABCs framework.
Direct manual pressure must be applied immediately to the femoral site.
Circulation takes precedence; stopping active blood loss is a higher priority than further diagnostic testing or delegation of duties.

Key Concept

Post-procedure hemorrhage management and prioritization
Question 766Question →

A nurse is providing care for a client who is receiving total parenteral nutrition (TPN) via a central venous access device. Which of the following nursing actions are necessary to ensure the safe administration of this therapy? Select all that apply.

Select all that apply

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Answer: Monitor capillary blood glucose levels every 4 to 6 hours.; Replace the intravenous administration set and filter every 24 hours.; Hang an infusion of 10% dextrose in water if the current TPN bag empties before a replacement is available.

Answer

The correct actions include monitoring blood glucose every 4 to 6 hours, replacing the IV tubing and filter every 24 hours, and hanging 10% dextrose in water if the TPN bag runs out early.
Total parenteral nutrition requires meticulous nursing management to prevent metabolic and infectious complications. Because of the high dextrose content, routine capillary blood glucose checks (usually every 4 to 6 hours) are mandatory to monitor for hyperglycemia. If the TPN infusion is interrupted or runs dry before the pharmacy provides the next bag, the nurse must infuse 10% dextrose in water (D10W) at the prescribed TPN rate to prevent profound rebound hypoglycemia. Finally, due to the high risk of microbial growth in the nutrient-rich solution, the IV tubing and inline filter must be completely replaced every 24 hours.

Step-by-Step Solution

1
Evaluate the risk of hyperglycemia and hypoglycemia associated with TPN.
Identify that blood glucose monitoring is required every 4-6 hours, and D10W must be hung if the TPN is interrupted to prevent rebound hypoglycemia.
TPN contains a high concentration of dextrose, which stresses the pancreas. Abrupt cessation removes the glucose source while insulin levels remain temporarily high.
2
Evaluate the infection risks associated with TPN administration.
Identify that the administration set and filter must be changed every 24 hours.
The nutrient-dense nature of TPN promotes rapid microbial growth, necessitating frequent tubing changes according to facility protocol and CDC guidelines.
3
Evaluate line compatibility and flow rate rules for TPN.
Identify that rates should never be sped up to catch up, and the line must remain dedicated solely to TPN.
Speeding up the rate causes hyperosmolar diuresis. Using the TPN line for other medications introduces the risk of dangerous precipitates and compromises line sterility.

Key Concept

Total Parenteral Nutrition (TPN) Safety and Administration Principles
Question 767Question →

Following a fall from a roof, a client with a confirmed unstable pelvic fracture experiences a sudden change in condition during the afternoon shift. The client, previously calm, becomes exceedingly restless and reports an intense sensation of thirst. The bedside monitor displays a heart rate of 126 beats/min, a blood pressure reading of 90/54 mm Hg, and a respiratory rate of 26 breaths/min. The indwelling urinary catheter has drained 15 mL of dark urine in the last 60 minutes. Which of the following immediate interventions are required? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Apply a supplemental oxygen delivery device.; Prepare for rapid replacement of intravascular volume using isotonic crystalloids.

Answer

The correct interventions are applying a supplemental oxygen delivery device and preparing for rapid replacement of intravascular volume using isotonic crystalloids.
The client is exhibiting classic signs of early compensatory hemorrhagic shock secondary to a pelvic fracture. Symptoms include tachycardia, hypotension, tachypnea, oliguria, intense thirst, and restlessness (a key early sign of cerebral hypoxia). The priority nursing actions are to maximize tissue oxygenation by applying supplemental oxygen and to restore circulating blood volume by preparing for rapid isotonic intravenous fluid administration.

Step-by-Step Solution

1
Analyze the client's clinical presentation and vital signs.
The client exhibits tachycardia, hypotension, tachypnea, severe oliguria, thirst, and new-onset restlessness after sustaining a high-risk injury (pelvic fracture).
Identifying abnormal assessment findings is the first step in recognizing a life-threatening complication such as hemorrhagic shock.
2
Determine the priority pathophysiological needs based on the ABCs (Airway, Breathing, Circulation).
The client requires immediate interventions to support oxygenation and restore depleted intravascular volume.
Hemorrhagic shock leads to inadequate cellular perfusion. Intervening promptly prevents progression to irreversible shock and multiorgan failure.
3
Evaluate the proposed interventions against the client's physiological state.
Oxygen therapy and fluid resuscitation address the core pathophysiology. Opioids and high-Fowler's positioning are contraindicated as they exacerbate hypotension and hypoperfusion.
Nursing actions must prioritize physiological stabilization and avoid interventions that mask symptoms or mechanically decrease cardiac output.

Key Concept

Early Recognition and Management of Hypovolemic Shock
Question 768Question →

A nurse is caring for a 74-year-old client who is 24 hours postoperative following a right-sided modified radical mastectomy with axillary lymph node dissection. The client reports mild discomfort and a feeling of heaviness in the right arm. Which of the following nursing actions is most appropriate to promote comfort and prevent complications?

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Answer: Elevate the client's right arm on a pillow so it rests slightly above the level of the heart.

Answer

Elevate the client's right arm on a pillow so it rests slightly above the level of the heart.
Elevating the affected arm on a pillow above the level of the heart uses gravity to facilitate lymphatic and venous drainage. This is a primary, non-pharmacologic comfort measure that reduces postoperative edema (lymphedema) and relieves the sensation of heaviness in the extremity following an axillary lymph node dissection.

Step-by-Step Solution

1
Analyze the client's postoperative status and reported symptoms.
The client is 24 hours post-mastectomy with axillary node dissection and reports arm heaviness, indicating a high risk for lymphedema and fluid accumulation.
Identifying the physiological risks associated with surgical lymphatic removal is essential for selecting appropriate comfort and preventative measures.
2
Evaluate the proposed nursing interventions against safety protocols and delegation guidelines.
Positioning on the operative side is contraindicated, initial teaching cannot be delegated to a UAP, and assuming symptoms are age-related delays necessary care.
Nursing actions must strictly adhere to scope of practice and evidence-based clinical guidelines to prevent client injury.
3
Select the intervention that safely addresses the client's discomfort.
Elevating the affected arm promotes venous and lymphatic return.
Gravity assists in draining fluid from the extremity, reducing localized edema, and relieving the feeling of heaviness without causing harm.

Key Concept

Post-mastectomy non-pharmacologic comfort and positioning
Question 769Question →

A nurse is monitoring a client who is receiving an intravenous infusion of a prescribed antibiotic. Fifteen minutes after the infusion starts, the client becomes restless and reports a feeling of impending doom. Which assessment finding should the nurse identify as the most definitive indicator that the client is developing anaphylactic shock?

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Answer: Diffuse expiratory wheezing and a heart rate of 122/min

Answer

The most definitive indicator of anaphylactic shock is diffuse expiratory wheezing combined with significant tachycardia.
Anaphylactic shock is a distributive shock characterized by sudden mast cell degranulation, leading to systemic vasodilation and profound bronchoconstriction. Diffuse expiratory wheezing directly indicates life-threatening airway compromise, while tachycardia is the rapid compensatory response to the massive drop in systemic vascular resistance. Together, these form the classic clinical presentation requiring immediate epinephrine administration.

Step-by-Step Solution

1
Analyze the client's initial symptoms (restlessness, impending doom) within the context of receiving an intravenous antibiotic.
Identify that the client is at high risk for a systemic hypersensitivity reaction.
Restlessness and a feeling of impending doom are classic early, subjective signs of anaphylaxis before overt hemodynamic collapse.
2
Recall the underlying pathophysiology of anaphylactic shock.
Determine that anaphylaxis involves massive systemic vasodilation and severe bronchoconstriction.
Mast cell degranulation releases histamine, which relaxes vascular smooth muscle (distributive shock) and constricts bronchial smooth muscle.
3
Evaluate the clinical findings in each option against the expected pathophysiology of anaphylaxis.
Identify wheezing and tachycardia as the signs that directly match bronchospasm and the compensatory cardiac response to vasodilation.
Narrowing pulse pressure indicates hypovolemic or compensatory shock, while respiratory alkalosis is a non-specific anxiety or early hypoxic response.

Key Concept

Early recognition of systemic anaphylaxis requires identifying signs of distributive shock (vasodilation causing tachycardia and eventual hypotension) combined with airway compromise (bronchospasm causing wheezing).
Estimated Time:1m 0s
Question 770Question →

A client is admitted to the medical-surgical unit immediately following a lumbar puncture. The client reports a mild, dull headache. Which of the following nursing actions is most appropriate?

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Answer: Maintain the client in a flat, supine position for the prescribed duration and encourage oral fluid intake.

Answer

Maintain the client in a flat, supine position for the prescribed duration and encourage oral fluid intake.
Following a lumbar puncture, clients are at risk for developing a spinal headache due to the leakage of cerebrospinal fluid from the puncture site. Maintaining the client in a flat, supine position for several hours (usually 4 to 8 hours depending on facility policy) minimizes gravity-assisted leakage. Additionally, encouraging oral fluid intake, if not contraindicated, helps replenish the cerebrospinal fluid volume, thereby resolving the headache and promoting client comfort.

Step-by-Step Solution

1
Identify the client's recent procedure and current symptoms.
The client had a lumbar puncture and is experiencing a mild headache, a common complication known as a spinal headache.
Understanding the clinical context is essential to determine the correct nursing intervention.
2
Determine the physiological cause of a post-lumbar puncture headache.
The headache is caused by the leakage of cerebrospinal fluid through the dural puncture, which decreases fluid volume and intracranial pressure.
Identifying the cause guides the selection of interventions to restore fluid volume and prevent further leakage.
3
Select the intervention that addresses the physiological cause.
Keeping the client flat minimizes gravity-induced cerebrospinal fluid leakage, and providing oral fluids helps rapidly replenish the lost fluid.
These combined actions effectively promote comfort and resolve the headache.

Key Concept

Post-Lumbar Puncture Positioning and Hydration
Question 771Question →

While conducting a comprehensive assessment on a client with a systemic infection, the nurse notes several physiological shifts. The nurse suspects the client is entering the early, hyperdynamic phase of septic shock. Which assessment findings indicate this specific stage of clinical deterioration? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Bounding peripheral pulses; Widening pulse pressure; Laboratory results showing a serum pH of 7.487.48 and a PaCO2PaCO_2 of 2929 mm Hg

Answer

The findings indicating early (hyperdynamic) septic shock are a widening pulse pressure, bounding peripheral pulses, and laboratory results demonstrating respiratory alkalosis.
Early (hyperdynamic) septic shock is characterized by profound systemic vasodilation caused by inflammatory mediators. This vasodilation leads to a decreased diastolic blood pressure, which widens the pulse pressure. Cardiac output initially increases to compensate, resulting in bounding peripheral pulses. Additionally, the client hyperventilates in response to early hypoxia and systemic inflammation, causing respiratory alkalosis (elevated pH, decreased PaCO2).

Step-by-Step Solution

1
Analyze the pathophysiology of early septic shock.
Early septic shock is characterized by a hyperdynamic state caused by massive systemic vasodilation in response to inflammatory mediators.
Understanding the underlying vasodilation helps differentiate this initial phase from other types of shock or the late stages of septic shock.
2
Evaluate the hemodynamic and peripheral assessment options based on vasodilation.
Profound vasodilation leads to a decreased diastolic blood pressure (causing a widened pulse pressure) and an initial increase in cardiac output (presenting as bounding pulses and warm skin).
This eliminates options describing a narrowing pulse pressure and cool, mottled extremities, which are signs of vasoconstriction and decreased cardiac output seen in late shock.
3
Assess the arterial blood gas (ABG) options in the context of early shock compensation.
Early in shock, the client hyperventilates to increase oxygen delivery, leading to 'blowing off' carbon dioxide and resulting in respiratory alkalosis.
Metabolic acidosis occurs later when prolonged tissue hypoxia forces anaerobic metabolism, leading to lactic acid accumulation.

Key Concept

Differentiation between the early (hyperdynamic) and late (hypodynamic) phases of septic shock.
Question 772Question →

A client with end-stage renal disease is brought to the emergency department with severe weakness and palpitations. The client's serum potassium level is 7.9 mEq/L7.9\text{ mEq/L} (7.9 mmol/L7.9\text{ mmol/L}), and the cardiac monitor displays widened QRS complexes. The healthcare provider prescribes STAT intravenous (IV) 10%10\% calcium gluconate, IV 8.4%8.4\% sodium bicarbonate, IV regular insulin, and IV 50%50\% dextrose. The client has a single peripheral IV line infusing 0.9%0.9\% sodium chloride. Which action by the nurse is the most appropriate?

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Answer: Administer the calcium gluconate and sodium bicarbonate sequentially, flushing the IV line thoroughly with 0.9%0.9\% sodium chloride between each medication.

Answer

The most appropriate action is to administer the medications separately, ensuring the IV line is thoroughly flushed with 0.9%0.9\% sodium chloride between the calcium gluconate and the sodium bicarbonate.
Calcium gluconate and sodium bicarbonate are physically incompatible. When mixed, they react to form an insoluble precipitate (calcium carbonate, or chalk) which can cause life-threatening emboli. To safely administer both medications through a single peripheral IV line, the nurse must administer them sequentially and ensure the line is thoroughly flushed with a compatible solution, such as 0.9%0.9\% sodium chloride, between the infusions.

Step-by-Step Solution

1
Analyze the client's clinical presentation and the prescribed medications.
The client has severe hyperkalemia with cardiac toxicity (widened QRS), requiring STAT administration of calcium gluconate, sodium bicarbonate, insulin, and dextrose.
Identifying the urgency and the purpose of each medication is required to prioritize safe administration.
2
Evaluate the physical compatibility of the prescribed intravenous medications.
Calcium gluconate and sodium bicarbonate are known to be highly physically incompatible when mixed together.
Mixing calcium salts with bicarbonate results in the formation of insoluble calcium carbonate precipitate.
3
Determine the safest method to administer incompatible medications through a single peripheral IV line.
The medications must be given separately, and the IV line must be flushed completely with a compatible neutral solution.
Thorough flushing prevents the incompatible medications from mixing inside the IV tubing, thereby preventing precipitation and potential embolic events.

Key Concept

Intravenous Medication Compatibility and Safe Administration Practices
Question 773Question →

A nurse is caring for a client who is receiving continuous total parenteral nutrition (TPN) via a single-lumen peripherally inserted central catheter (PICC). The healthcare provider prescribes a scheduled dose of intravenous (IV) ceftriaxone. The drug reference guide indicates that ceftriaxone is chemically incompatible with the TPN formulation. Which of the following is the most appropriate nursing action?

Show answer & explanation

Answer: Initiate a new peripheral intravenous catheter to administer the prescribed antibiotic.

Answer

The nurse must initiate a new peripheral intravenous catheter to administer the prescribed antibiotic safely.
The correct action involves establishing a new peripheral intravenous site. Total parenteral nutrition (TPN) requires a strictly dedicated IV line due to its high glucose and lipid content, which carries a substantial risk for infection. Additionally, abruptly pausing continuous TPN to administer another medication can cause sudden, severe hypoglycemia. Because ceftriaxone is chemically incompatible with TPN and can cause fatal precipitates (especially with calcium often found in TPN), and the central line must remain dedicated and uninterrupted, the nurse must establish a new peripheral IV access to safely deliver the scheduled antibiotic.

Step-by-Step Solution

1
Identify the chemical incompatibility between ceftriaxone and the total parenteral nutrition (TPN) solution.
Recognize that the two solutions cannot be mixed in the same IV tubing or catheter lumen without causing dangerous precipitation.
Mixing incompatible solutions, especially TPN which often contains calcium, with ceftriaxone can cause fatal crystalline precipitates.
2
Evaluate the current venous access and the physiological requirements of TPN administration.
Note that the client has only a single-lumen central line that must remain dedicated to continuous TPN.
TPN lines must remain strictly dedicated to prevent central line-associated bloodstream infections (CLABSI), and TPN cannot be abruptly paused due to the risk of severe reactive hypoglycemia.
3
Determine the safest method to administer the scheduled antibiotic without compromising the TPN therapy.
Select the insertion of a new peripheral IV catheter as the safest and most appropriate intervention.
A separate IV line ensures timely administration of the antibiotic while maintaining the dedicated TPN line and preventing drug incompatibilities.

Key Concept

Management of Intravenous Incompatibilities and Total Parenteral Nutrition (TPN) Safety
Question 774Question →

While assessing a client on the first postoperative day following a total thyroidectomy, the nurse observes the client experiencing severe anxiety, visible muscle twitching, and circumoral paresthesia. The rapid response team is activated, and a stat arterial blood gas (ABG) analysis is drawn, reporting the following values: pH 7.547.54, PaCO2PaCO_2 2626 mmHgmm Hg, HCO3−HCO_3^- 2323 mEq/LmEq/L, and PaO2PaO_2 9696 mmHgmm Hg. Based on these findings, which initial action is most appropriate to mitigate the risk of impending seizures or tetany?

Show answer & explanation

Answer: Instruct the client to breathe slowly and deeply into a paper bag or cupped hands.

Answer

The correct action is to instruct the client to breathe slowly into a paper bag or cupped hands to correct the respiratory alkalosis.
The client is exhibiting signs of uncompensated respiratory alkalosis (pH > 7.45 and PaCO2 < 35 mm Hg) driven by hyperventilation (anxiety/panic). In an alkalotic state, hydrogen ions dissociate from albumin molecules in the blood. This leaves empty binding sites on the albumin, which calcium ions quickly fill, sharply decreasing the amount of biologically active, free 'ionized' calcium. For a client who is already at peak risk for hypocalcemia following a total thyroidectomy (due to potential parathyroid gland injury), this sudden drop in ionized calcium rapidly precipitates acute tetany, manifesting as circumoral paresthesia and muscle twitching. Coaching the client to breathe into a paper bag allows the rebreathing of carbon dioxide. This corrects the hypocapnia and alkalosis, subsequently releasing calcium from albumin and rapidly increasing the free ionized calcium to mitigate the immediate risk of seizures.

Step-by-Step Solution

1
Analyze the arterial blood gas (ABG) values to determine the primary physiological derangement.
The pH is elevated (7.547.54) and the PaCO2PaCO_2 is decreased (2626 mmHgmm Hg), indicating uncompensated respiratory alkalosis due to hyperventilation.
Accurate interpretation of diagnostic data is required to identify the root cause of the acute deterioration.
2
Correlate the acid-base imbalance with the surgical history and clinical symptoms.
Alkalosis causes hydrogen ions to dissociate from albumin, allowing more calcium to bind to these proteins. This sharply decreases active ionized calcium.
Understanding this physiological relationship explains why the hyperventilation is causing acute tetany (muscle twitching, paresthesia) in a client already at risk for hypocalcemia post-thyroidectomy.
3
Select the most appropriate immediate intervention to reverse the specific pathophysiological mechanism.
Having the client rebreathe their expired carbon dioxide corrects the hypocapnia and shifts the blood pH back toward normal, which releases calcium back into its ionized, active state.
Correcting the respiratory alkalosis is the fastest, most direct method to stabilize the ionized calcium and prevent a life-threatening seizure while pharmacological interventions are being prepared.

Key Concept

The physiological relationship between respiratory alkalosis, protein binding, and ionized hypocalcemia in post-surgical clients.
Question 775Question →

A nurse is assessing a client who experienced an acute anterior myocardial infarction earlier in the shift. Which of the following assessment findings indicate the client is developing cardiogenic shock? Select all that apply.

Select all that apply

Show answer & explanation

Answer: Urine output of 15 mL over the past hour; Narrowing pulse pressure; New onset of restlessness and confusion

Answer

The findings indicating cardiogenic shock include a urine output of 15 mL over the past hour, narrowing pulse pressure, and a new onset of restlessness and confusion.
Cardiogenic shock occurs when the heart loses its ability to pump effectively, leading to systemic hypoperfusion. The correct assessment findings directly reflect this critical state: a urine output of 15 mL/hr demonstrates reduced renal blood flow; a narrowing pulse pressure occurs as systolic pressure falls and diastolic pressure rises from compensatory vasoconstriction; and new onset restlessness signifies decreased cerebral perfusion.

Step-by-Step Solution

1
Analyze the client's underlying condition and primary risk.
The client had an anterior myocardial infarction, which significantly damages the left ventricle and severely impairs cardiac contractility, placing them at high risk for pump failure.
Understanding the primary pathology helps predict the type of physiological decompensation (cardiogenic shock).
2
Identify the physiological consequences of cardiac pump failure.
Impaired pumping leads to a dramatic drop in stroke volume and cardiac output, reducing oxygen delivery and blood flow to vital organs.
Organ hypoperfusion and the body's compensatory mechanisms create the classic clinical signs of cardiogenic shock.
3
Evaluate each assessment finding against the signs of hypoperfusion.
Oliguria reflects poor renal perfusion. A narrowing pulse pressure indicates compensatory vasoconstriction combined with falling systolic pressure. Restlessness indicates cerebral hypoxia. Weak pulses and tachycardia are the expected hemodynamic responses.
Matching the clinical signs to the pathophysiology correctly differentiates true shock from stable recovery or other complications.

Key Concept

Cardiogenic shock is characterized by severe impairment of ventricular pumping, leading to decreased cardiac output, systemic organ hypoperfusion, and compensatory sympathetic nervous system activation.
Estimated Time:1m 30s
Question 776Question →

A nurse enters the room of a client receiving continuous intravenous fluids through a right subclavian central venous access device (CVAD). The nurse observes that the IV tubing has completely disconnected from the catheter hub. The client is suddenly tachypneic, diaphoretic, and reports severe, sharp chest pain. After immediately clamping the CVAD, which of the following is the nurse's priority action?

Show answer & explanation

Answer: Place the client in a left lateral Trendelenburg position

Answer

Place the client in a left lateral Trendelenburg position
The client is exhibiting classic signs of a venous air embolism, a life-threatening complication caused by air entering the venous system through an open central line. Placing the client in the left lateral Trendelenburg position (Durant's maneuver) is the absolute priority. This position utilizes gravity to trap the air bubble in the apex of the right ventricle, preventing it from migrating into the right ventricular outflow tract and pulmonary artery, which would cause an acute obstructive shock.

Step-by-Step Solution

1
Analyze the clinical scenario
The client has a disconnected CVAD with sudden onset of respiratory distress and chest pain.
These findings are classic indicators of a venous air embolism, which occurs when negative intrathoracic pressure draws room air into the open venous system.
2
Identify the immediate physiological threat
Air entering the right side of the heart can block the right ventricular outflow tract and pulmonary artery, causing acute obstructive shock.
Immediate physical intervention is required to prevent the air from migrating further into the pulmonary circulation.
3
Determine the priority intervention
Placing the client in a left lateral Trendelenburg position (Durant's maneuver) traps the air in the apex of the right ventricle.
This positional change keeps the buoyant air bubble away from the pulmonary valve, maintaining cardiac output and reducing the risk of a fatal obstruction.

Key Concept

Management of Venous Air Embolism
Question 777Question →

A 2828-year-old client is admitted to the trauma unit after sustaining a closed pelvic fracture in a motorcycle collision. The nurse is monitoring the client for potential complications. Which of the following assessment findings suggest early physiological decompensation and require immediate intervention? (Select all that apply.)

Select all that apply

Show answer & explanation

Answer: A gradual increase in resting heart rate from 8282 to 118 beats/min118\text{ beats/min}; A narrowing of the pulse pressure from 45 mmHg45\text{ mmHg} to 22 mmHg22\text{ mmHg}; The development of new-onset restlessness and mild confusion

Answer

The correct findings that suggest early physiological decompensation are the gradual increase in resting heart rate, the narrowing of the pulse pressure, and the development of new-onset restlessness and mild confusion.
Pelvic fractures pose a high risk for severe internal bleeding and hypovolemic shock. Early signs of hypovolemic shock include a compensatory increase in heart rate (tachycardia) to maintain cardiac output, a narrowing pulse pressure (due to peripheral vasoconstriction raising the diastolic pressure), and early changes in the level of consciousness (such as restlessness, anxiety, or mild confusion) due to decreased cerebral perfusion. Identifying these subtle, early signs allows for prompt intervention before irreversible decompensation occurs.

Step-by-Step Solution

1
Analyze the client's clinical presentation and associated risk factors.
The client has a closed pelvic fracture, which carries a very high risk for massive internal hemorrhage and subsequent hypovolemic shock.
Pelvic fractures can easily lacerate major regional blood vessels, leading to significant, concealed internal blood loss.
2
Evaluate each assessment finding to differentiate between expected post-trauma responses and early signs of shock.
Tachycardia, a narrowing pulse pressure, and altered mental status are identified as abnormal, compensatory responses to volume loss.
During early hypovolemia, the sympathetic nervous system triggers an increased heart rate and peripheral vasoconstriction (narrowing the pulse pressure) to maintain cardiac output, while early brain hypoxia manifests as restlessness.
3
Identify the expected findings that do not represent an immediate life-threatening priority.
Severe localized pain, a mild temperature elevation, and a urine output of 45 mL/hr45\text{ mL/hr} are recognized as expected or adequate findings.
Prioritization requires distinguishing between stable, expected inflammatory/traumatic responses and subtle hemodynamic indicators of instability.

Key Concept

Early Detection of Hypovolemic Shock in Trauma
Question 778Question →

An adult client is admitted with community-acquired pneumonia and has a continuous peripheral intravenous (IV) infusion of Lactated Ringer's solution running at 125 mL/hr125 \text{ mL/hr}. The healthcare provider prescribes a scheduled dose of intravenous ceftriaxone. Based on pharmacological safety principles, which action should the nurse perform?

Show answer & explanation

Answer: Stop the continuous infusion, flush the line thoroughly with 0.9%0.9\% sodium chloride, administer the antibiotic, and flush again before resuming.

Answer

The nurse should stop the primary infusion, flush the line with 0.9% sodium chloride, administer the ceftriaxone, and flush the line again before resuming the Lactated Ringer's.
Ceftriaxone is incompatible with calcium-containing solutions, such as Lactated Ringer's, because they can combine to form life-threatening precipitates. In adult clients, these two fluids cannot be administered simultaneously. However, they can be safely administered sequentially through the same intravenous line if the nurse pauses the primary fluid and thoroughly flushes the tubing with a compatible solution, such as 0.9% sodium chloride, both before and after the ceftriaxone infusion.

Step-by-Step Solution

1
Identify the active ingredients in the prescribed fluids.
The primary fluid is Lactated Ringer's (which contains calcium) and the prescribed medication is ceftriaxone.
Recognizing fluid components is the first step in assessing intravenous compatibility.
2
Determine the compatibility of ceftriaxone and calcium-containing solutions.
Ceftriaxone and calcium are incompatible and will form dangerous precipitates if mixed together.
Preventing the administration of incompatible intravenous medications is critical for client safety.
3
Select the appropriate administration technique for incompatible solutions through a single access site.
The primary infusion must be paused, and the tubing must be thoroughly flushed with a compatible fluid (like 0.9% sodium chloride) before and after the antibiotic.
Flushing clears the line of any residual calcium, allowing the safe sequential administration of the antibiotic.

Key Concept

Intravenous Compatibility and Safe Parenteral Administration
Estimated Time:1m 15s
Question 779Question →

A nurse is caring for a client with a T4 spinal cord injury who suddenly reports a severe, pounding headache. Assessment reveals profuse diaphoresis above the level of the injury, a blood pressure of 210/115 mm Hg, and a heart rate of 54 bpm. Arrange the following nursing interventions in the correct priority sequence, from first to last.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct sequence is: Place the client in a high Fowler's position, assess the urinary catheter for kinks, examine the rectum for impaction, and finally administer the prescribed antihypertensive medication.
The correct sequence prioritizes immediate physiological safety by inducing orthostatic hypotension through upright positioning, followed by a systematic assessment to eliminate the most common noxious stimuli (bladder then bowel), and finally utilizing pharmacological intervention if the stimulus cannot be resolved.

Step-by-Step Solution

1
Recognize the clinical presentation of autonomic dysreflexia.
The client has a T4 spinal cord injury, severe hypertension, bradycardia, headache, and diaphoresis.
Identifying the medical emergency is required to initiate the correct crisis management protocol.
2
Determine the priority first action to mitigate immediate risk.
Positioning the client upright in a high Fowler's position is the immediate first step.
Raising the head of the bed induces orthostatic hypotension, which rapidly decreases the blood pressure and minimizes the risk of a stroke.
3
Sequence the assessment for triggering noxious stimuli.
Checking the bladder and catheter comes before checking the bowel.
Bladder distention is the most frequent cause of autonomic dysreflexia, making it the highest priority assessment after positioning. Bowel impaction is the second most common.
4
Determine the role of pharmacological intervention.
Administering antihypertensive medication is the final step in this sequence.
Medications are indicated only if the blood pressure remains elevated after the noxious stimuli have been identified and removed, or if the stimulus cannot be immediately resolved.

Key Concept

Autonomic dysreflexia is a life-threatening emergency in clients with spinal cord injuries at or above T6, requiring immediate upright positioning followed by the identification and removal of noxious stimuli (usually bladder or bowel).
Question 780Question →

An adult client receiving a continuous 0.9%0.9\% sodium chloride infusion at 75 mL/hr75\text{ mL/hr} through a single peripheral venous catheter is prescribed a dose of intravenous amphotericin B for a severe fungal infection. Before hanging the antifungal medication, which action must the nurse prioritize to ensure safe administration?

Show answer & explanation

Answer: Pause the primary fluid and flush the intravenous line thoroughly with 5%5\% dextrose in water before and after the medication.

Answer

The correct action is to pause the primary normal saline fluid and flush the line thoroughly with 5% dextrose in water both before and after administering the medication.
Amphotericin B is chemically incompatible with saline solutions (such as 0.9%0.9\% sodium chloride) and will form a precipitate if they are allowed to mix. To safely administer this medication through a single intravenous line that has been infusing saline, the nurse must pause the saline infusion and thoroughly flush the line with 5%5\% dextrose in water (D5W) both before and after the amphotericin B infusion.

Step-by-Step Solution

1
Identify the continuous intravenous fluid currently infusing.
The client is receiving 0.9% sodium chloride (normal saline).
Establishing the baseline fluid is necessary to determine compatibility with the newly prescribed intravenous medication.
2
Determine the chemical compatibility of amphotericin B with the current intravenous fluid.
Amphotericin B is chemically incompatible with 0.9% sodium chloride.
Mixing incompatible medications or fluids causes precipitation, which can permanently occlude the catheter or cause a life-threatening embolus.
3
Select the appropriate nursing intervention for administering an incompatible medication through a single line.
The line must be cleared of saline using a compatible flush solution, which for amphotericin B is 5% dextrose in water (D5W).
Thorough flushing before and after the infusion prevents the two incompatible solutions from ever mixing within the intravenous tubing.

Key Concept

Safe administration of intravenous amphotericin B and prevention of chemical incompatibility.
Estimated Time:1m 30s
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