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Difficulty: HardPreoperative and Postoperative Care

A 55-year-old man is evaluated 20 hours after undergoing an open partial colectomy for an obstructing colon mass. The surgical team is urgently called because the patient has developed sudden confusion and a high fever. His temperature is 39.8°C (103.6°F), blood pressure is 82/48 mm Hg, pulse is 132/min, and respirations are 28/min. The patient reports agonizing pain around his abdominal incision, which has rapidly worsened over the last few hours despite adequate opioid analgesia. Physical examination shows a confused, diaphoretic man. The abdominal dressing is removed, revealing significant edema, erythema, and purplish discoloration of the skin extending radially from the incision. Palpation of the abdominal wall elicits coarse crepitus. There is a small amount of thin, grayish, foul-smelling discharge at the wound edges. Intravenous fluids and broad-spectrum antibiotics are immediately ordered. Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate surgical exploration in the operating roomAnswer
  2. B
    Computed tomography of the abdomen and pelvis
  3. C
    Opening of the surgical incision at the bedside
  4. D
    Measurement of intra-abdominal pressure
  5. E
    Bedside swab of the wound for Gram stain and culture

Answer

The most appropriate next step is immediate surgical exploration in the operating room.
The correct answer is immediate surgical exploration in the operating room. This patient is presenting with classic signs of a necrotizing soft tissue infection (NSTI), which is a life-threatening surgical emergency. While typical surgical site infections (the 'Wound' in the '5 Ws' of postoperative fever) present on postoperative days 5 to 7, NSTIs (often caused by Clostridium perfringens or Group A Streptococcus) can present fulminantly within the first 24 to 48 hours. Key clinical findings include severe pain out of proportion to the surgical wound, early high fever, hemodynamic instability (septic shock), purplish or bronze skin discoloration, 'dishwater' (grayish) wound discharge, and crepitus due to subcutaneous gas formation. Although broad-spectrum antibiotics and aggressive fluid resuscitation are essential initial steps, the definitive and life-saving treatment is immediate surgical exploration and extensive debridement of all necrotic tissue in the operating room. Delaying surgery for imaging or superficial bedside procedures significantly increases mortality.

Step-by-Step Solution

1
Analyze the timing of the patient's presentation.
The patient is on postoperative day 1 (20 hours post-op) and has developed a sudden, high fever.
Establishing the timeline helps rule in early postoperative complications (Wind, NSTI) and rule out typical later complications (like DVT or standard wound infections).
2
Evaluate the clinical signs and vital signs.
The patient is in septic shock (blood pressure 82/48 mm Hg) with severe wound pain, purplish skin, crepitus, and 'dishwater' drainage.
These are the hallmark signs of a necrotizing soft tissue infection (NSTI), differentiating it from a simple, superficial surgical site infection.
3
Determine the definitive management for the suspected diagnosis.
Identify that NSTI is a surgical emergency requiring immediate source control.
Antibiotics alone cannot penetrate necrotic fascia. Survival depends on emergent and extensive surgical debridement of all dead tissue.
4
Select the option that provides the required definitive treatment.
Immediate surgical exploration in the operating room is chosen.
This is the only intervention that provides life-saving source control, whereas imaging or bedside procedures would cause fatal delays.

Key Concept

While routine surgical site infections typically present on postoperative days 5-7, the development of early postoperative fever (within 24-48 hours) accompanied by severe wound pain out of proportion to exam, purplish skin discoloration, crepitus, and hemodynamic instability indicates a necrotizing soft tissue infection. This is a surgical emergency requiring immediate broad-spectrum antibiotics and urgent surgical exploration in the operating room.

Alternative Method

While not a different method to solve the question, calculating the Modified Laboratory Risk Indicator for Necrotizing Fasciitis (LRINEC) score can aid in diagnosing equivocal cases of NSTI. However, in a patient with obvious clinical signs (crepitus, skin discoloration, septic shock), clinical judgment mandates immediate surgery without waiting for calculated scores.
Estimated Time:1m 30s
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Topics

Preoperative and Postoperative Care

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