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Difficulty: HardPreoperative and Postoperative Care

A surgical team evaluates a 74-year-old man on the third day after he underwent an open low anterior resection for a rectal adenocarcinoma. Over the past 24 hours, the patient has required an escalating amount of supplemental oxygen and is now complaining of severe shortness of breath and a cough productive of pink, frothy sputum. He has a medical history significant for chronic obstructive pulmonary disease, hypertension, and a myocardial infarction four years ago. During the surgery, he experienced significant hemorrhage requiring the transfusion of three units of packed red blood cells and the administration of 4 liters of normal saline.

His current temperature is 37.8°C (100.0°F), blood pressure is 165/95 mm Hg, pulse is 114/min, and respiratory rate is 28/min. Pulse oximetry indicates an oxygen saturation of 85% on room air. Physical examination demonstrates distended jugular veins when positioned at 45 degrees. Auscultation of the chest reveals bilateral crackles extending up to the mid-scapular regions, accompanied by scattered expiratory wheezes. Cardiac auscultation reveals a regular tachycardia with a prominent S3 gallop. The abdominal incision is well-approximated with no erythema or drainage.

Which of the following are the most appropriate immediate steps in the management of this patient's condition? (Select 2)

  1. Intravenous administration of a loop diureticAnswer
  2. Initiation of noninvasive positive pressure ventilationAnswer
  3. C
    Intravenous administration of systemic glucocorticoids
  4. D
    Sputum culture collection and initiation of empiric piperacillin-tazobactam
  5. E
    Emergent computed tomography angiography of the pulmonary arteries

Answer

The most appropriate immediate steps are the intravenous administration of a loop diuretic and the initiation of noninvasive positive pressure ventilation.
This patient is experiencing acute decompensated heart failure (ADHF) with cardiogenic pulmonary edema, highly likely triggered by the aggressive intraoperative fluid and blood product resuscitation interacting with his underlying cardiovascular disease (prior myocardial infarction). The clinical triad of severe jugular venous distention, an S3 gallop, and diffuse bibasilar crackles with pink frothy sputum heavily points to volume overload and left ventricular failure. The immediate management of ADHF focuses on reducing central venous pressure and improving oxygenation. Intravenous loop diuretics (such as furosemide) provide rapid venodilation and subsequent diuresis to reduce cardiac preload. Simultaneously, noninvasive positive pressure ventilation (NPPV) provides critical respiratory support by keeping alveoli open (reducing intrapulmonary shunting), decreasing the work of breathing, and further reducing both cardiac preload and afterload through increased intrathoracic pressure.

Step-by-Step Solution

1
Analyze the patient's postoperative timeline, fluid balance, and clinical presentation.
The patient received massive perioperative volume resuscitation and is now presenting on postoperative day 3 with hypoxia, tachypnea, and pink, frothy sputum.
Establishing the temporal relationship between fluid administration and symptom onset helps differentiate fluid overload from infectious or thromboembolic complications.
2
Interpret the physical examination findings.
Jugular venous distention, an S3 gallop, and bilateral crackles are classic signs of fluid overload and left ventricular failure, confirming a diagnosis of acute decompensated heart failure (ADHF).
Relying on physical exam findings prevents the misdiagnosis of the patient's wheezing as a COPD exacerbation or the mild temperature elevation as a pneumonia.
3
Select the appropriate targeted interventions.
Intravenous loop diuretics and noninvasive positive pressure ventilation (NPPV) are selected.
These therapies rapidly reduce cardiac preload, decrease the work of breathing, and improve oxygen exchange in the setting of cardiogenic pulmonary edema.

Key Concept

The classic presentation of postoperative acute decompensated heart failure includes hypoxia, jugular venous distention, bibasilar crackles, and an S3 gallop, often following aggressive perioperative fluid resuscitation. Immediate management requires preload reduction (loop diuretics) and respiratory support (noninvasive positive pressure ventilation).
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Topics

Preoperative and Postoperative Care

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