The nurse is monitoring a client who received cisplatin chemotherapy 48 hours ago and is now experiencing multiple side effects. Which assessment finding requires the most immediate nursing intervention?

A serum creatinine of 3.2 mg/dL with decreased urine output indicates acute kidney injury, a life-threatening cisplatin side effect requiring immediate intervention. Other options represent less urgent side effects.

Core Nursing Explanation Key Concept Analysis: This question assesses the nurse's ability to prioritize life-threatening complications of chemotherapy. The core theme is recognizing cisplatin-induced nephrotoxicity as an urgent, potentially fatal side effect. Cisplatin is a platinum-based chemotherapeutic agent that accumulates in the renal tubules, causing direct tubular cell damage and vasoconstriction, leading to Acute Kidney Injury (AKI). A serum creatinine of 3.2 mg/dL (normal: 0.6-1.2 mg/dL) with oliguria is a clear sign of significant renal impairment.

Answer Rationale: Key Point! Nephrotoxicity is the dose-limiting and most serious toxicity of cisplatin. It can lead to permanent renal failure and is a direct threat to the patient's life. The combination of elevated serum creatinine and decreased urine output indicates the kidneys are not adequately filtering waste or producing urine, which requires immediate interventions like aggressive IV hydration, monitoring of electrolytes (especially magnesium and potassium), and possible adjustment or cessation of future cisplatin doses.

Distractor Analysis:
Watch out for confusion! Option 2: Mild nausea and vomiting, even common, are not immediately life-threatening when controlled. Cisplatin is highly emetogenic, but proactive antiemetic management is standard.
Option 3: Tinnitus and high-frequency hearing loss indicate ototoxicity, another known side effect of cisplatin. While it can impact quality of life and is often irreversible, it is not an acute life-threatening emergency.
Option 4: Numbness and tingling (paresthesias) in the extremities are signs of peripheral neuropathy, a common dose-limiting toxicity. It is chronic, often progressive, and requires monitoring and symptom management, but does not constitute an immediate physiological crisis.

Related Concepts: The nursing priority follows the ABCs (Airway, Breathing, Circulation) and Maslow's Hierarchy of Needs. Impaired renal function affects circulation (fluid volume, electrolyte balance, and toxin removal), which is a physiological need that takes precedence over safety needs (neuropathy, hearing loss) or comfort needs (nausea).

Nursing Clinical Practice Guide Clinical Scenario: You are caring for Mr. Johnson, a 58-year-old with testicular cancer on day 2 post-cisplatin infusion. His urine output has dropped to 20 mL/hr over the last 4 hours, and he appears fatigued. The latest lab shows elevated BUN and creatinine.

Nursing Intervention Strategy: 1. Assessment: Immediately perform a focused assessment: vital signs (for hypotension or hypertension), lung sounds (for crackles indicating fluid overload), strict I&O (Intake and Output), daily weights, and assess for edema. Review full electrolyte panel (K+, Mg2+, Na+, Ca2+). 2. Action: Notify the physician/oncologist STAT. Anticipate orders for: - Aggressive IV hydration with normal saline to promote renal clearance of cisplatin. - Possible administration of amifostine, a cytoprotective agent used to reduce nephrotoxicity in some protocols. - Holding any other nephrotoxic medications (e.g., NSAIDs, certain antibiotics). 3. Monitoring & Evaluation: Monitor urine output hourly; goal is >100 mL/hr during and after hydration. Re-check renal function labs. Evaluate response to hydration and report trends.

Patient Safety and Precautions: Cisplatin is always administered with pre- and post-hydration. Never administer a cisplatin dose if the patient has unresolved renal impairment from the previous cycle. Monitor for hypomagnesemia, a common and severe electrolyte disturbance associated with cisplatin nephrotoxicity.

Nursing Procedure & Medication Flow Cisplatin Administration & Monitoring Protocol: 1. Pre-Medication: Administer prescribed antiemetics (e.g., 5-HT3 antagonist like ondansetron, plus aprepitant and dexamethasone). 2. Hydration: Infuse 1-2 liters of IV normal saline before cisplatin. Continue hydration during and for several hours after the infusion. Total post-hydration may be 2-3 liters. 3. Infusion: Administer cisplatin IV over 1-6 hours as ordered, typically in a solution with saline (not dextrose, which can reduce drug stability). 4. Post-Infusion Care: Force oral fluids if tolerated. Continue I&O monitoring for 48-72 hours. Educate patient to report decreased urine output, dizziness, or hearing changes.

A Word from Your Senior Nurse "In oncology nursing, we walk a tightrope between fighting cancer and protecting the patient from the treatment's collateral damage. Cisplatin can cure cancers like testicular cancer, but its kidney toxicity is legendary. Your vigilant assessment of I&O and early recognition of lab changes aren't just tasks—they are the guardrails that prevent a patient from spiraling into renal failure. Always remember: Hydration is your first and best defense against cisplatin nephrotoxicity. On the NCLEX, they test this priority constantly. In real life, it saves kidneys."