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Difficulty: Very hardReduction of Risk Potential

A critical care registered nurse evaluates a client 44 hours post-endovascular aneurysm repair (EVAR) of an abdominal aortic aneurysm via bilateral femoral artery access. The client has a documented history of severe emphysema. Which clinical findings or observations demand immediate intervention to mitigate physiological deterioration? Select all that apply.

  1. Progressive, severe lumbar back pain that remains unrelieved by prescribed intravenous analgesia.Answer
  2. A consecutive two-hour urine output totaling 30 mL30\text{ mL}.Answer
  3. Sudden onset of unilateral mottling with absent Doppler pedal pulses in the left lower extremity.Answer
  4. D
    Arterial blood gas analysis revealing a pH of 7.367.36, PaCO2PaCO_2 of 54 mm Hg54\text{ mm Hg}, and HCO3−HCO_3^- of 30 mEq/L30\text{ mEq/L}.
  5. E
    The client resting in a strict supine position with the head of the bed elevated to 15∘15^\circ.
  6. F
    A colleague auscultating the client's abdomen for bowel sounds prior to performing light palpation.

Answer

The findings requiring immediate intervention are the progressive lumbar back pain, the two-hour urine output of 30 mL, and the unilateral mottling with absent pedal pulses.
The correct findings directly indicate impending life-threatening physiological decompensation. Progressive lumbar back pain is the hallmark sign of an endoleak or retroperitoneal hemorrhage. An oliguric urine output of 30 mL30\text{ mL} over two hours (15 mL/hr15\text{ mL/hr}) suggests acute kidney injury secondary to contrast nephropathy or graft migration occluding the renal arteries. Finally, absent pedal pulses with unilateral mottling signify acute limb ischemia caused by arterial thrombosis or a distal embolus from the procedure.

Step-by-Step Solution

1
Analyze the procedure-specific risks associated with an endovascular aneurysm repair (EVAR).
Identify potential life-threatening complications such as endoleak, retroperitoneal hemorrhage, graft migration affecting renal arteries, and distal arterial embolization.
Recognizing specific postoperative risks allows the nurse to prioritize subtle cues of physiological decompensation.
2
Evaluate the client's comorbid conditions and their impact on baseline diagnostic data.
Determine that the elevated carbon dioxide and bicarbonate with a normal pH is a chronic, compensated state for a client with emphysema.
Differentiating between acute respiratory failure and chronic compensation prevents inappropriate and potentially harmful interventions.
3
Review general postoperative and physical assessment standards of care.
Confirm that supine positioning with minimal bed elevation is required for femoral access recovery, and auscultating before palpating is the standard abdominal assessment sequence.
Preventing iatrogenic complications requires strict adherence to evidence-based practice and positioning protocols.

Key Concept

Early Recognition of Postoperative EVAR Complications and Distinguishing Baseline Pathologies
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Topics

Reduction of Risk Potential

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