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Difficulty: MediumPreoperative and Postoperative Care

A 74-year-old man is assessed on the surgical ward 48 hours after undergoing an uncomplicated right hemicolectomy for adenocarcinoma. His past medical history is significant for chronic obstructive pulmonary disease and ischemic cardiomyopathy. Since the operation, he has been receiving continuous intravenous lactated Ringer's at 125 mL/hr. Current vital signs show a temperature of 38.1°C (100.6°F), heart rate of 105/min, blood pressure of 142/86 mmHg, and a respiratory rate of 24/min. Pulse oximetry reveals an oxygen saturation of 91% on room air. Physical examination demonstrates distended neck veins up to 9 cm H2O and scattered fine crackles at the bases of both lungs. There is no wheezing or rhonchi. The surgical incision is clean, dry, and intact without surrounding erythema. Which of the following are appropriate management steps for this patient? (Select exactly two options)

  1. Prescribe a loop diuretic to optimize volume statusAnswer
  2. Apply supplemental oxygen therapyAnswer
  3. C
    Treat with systemic glucocorticoids and inhaled bronchodilators
  4. D
    Order comprehensive microbiological cultures of blood and urine
  5. E
    Commence broad-spectrum antimicrobial therapy covering enteric organisms

Answer

The correct management involves prescribing a loop diuretic and applying supplemental oxygen therapy to treat acute decompensated heart failure.
This patient presents with classic signs of acute decompensated heart failure triggered by perioperative volume resuscitation. The elevated jugular venous pressure, bibasilar crackles, tachypnea, and borderline hypoxia in a patient with a history of ischemic cardiomyopathy strongly point to fluid overload. Therefore, reducing intravascular volume with a loop diuretic and providing supplemental oxygen to address the hypoxia are the most appropriate therapeutic steps.

Step-by-Step Solution

1
Analyze the postoperative presentation and vital signs.
The patient has a low-grade fever, tachycardia, tachypnea, and borderline hypoxia on postoperative day 2.
Establishing the timeline and severity of symptoms helps differentiate benign postoperative changes from life-threatening complications.
2
Interpret the physical examination findings.
Jugular venous distention and bibasilar crackles without wheezing strongly point to volume overload.
These findings, in the context of continuous IV fluids and ischemic cardiomyopathy, identify acute decompensated heart failure as the primary cause of respiratory distress.
3
Select the appropriate targeted interventions.
A loop diuretic is chosen to remove excess fluid, and oxygen is given to correct hypoxia.
Targeting the underlying volume overload directly resolves the respiratory compromise, avoiding unnecessary treatments for unrelated comorbidities.

Key Concept

Early postoperative fever is often physiologic, and patients with cardiac comorbidities receiving aggressive intravenous fluids are at high risk for acute decompensated heart failure, which presents with volume overload and requires diuresis.
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Topics

Preoperative and Postoperative Care

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