A 62-year-old man is evaluated on postoperative day 5 following an elective anterior resec… — USMLE Step 2 CK

A $62$ -year-old man is evaluated on postoperative day $5$ following an elective anterior resection of the rectum for a malignant mass. Over the past $6$ hours, he has developed progressively worsening, severe abdominal pain and altered mental status. His medical history is significant for type 2 diabetes mellitus and hypertension. His current temperature is $39.1^\circ\text{C}$ ( $102.4^\circ\text{F}$ ), blood pressure is $86/52\text{ mm Hg}$ , pulse is $128/\text{min}$ , and respiratory rate is $26/\text{min}$ . Physical examination reveals an ill-appearing, diaphoretic patient. The abdomen is distended, tense, and diffusely tender to palpation with involuntary guarding and pronounced rebound tenderness. Bowel sounds are absent. The surgical incision shows no signs of erythema or purulent discharge. Laboratory studies demonstrate a leukocyte count of $19,400/\text{mm}^3$ with $14\%$ band forms, and a serum lactate level of $4.2\text{ mmol/L}$ . Intravenous fluid resuscitation and broad-spectrum antibiotics are initiated immediately. Which of the following is the most appropriate next step in management?

Emergent exploratory laparotomyCevap
B
Computed tomography scan of the abdomen and pelvis
C
Image-guided percutaneous drainage
D
Continuation of broad-spectrum antibiotics and fluid resuscitation as sole therapy
E
Insertion of a nasogastric tube and conservative management

Cevap

The most appropriate next step in management is an emergent exploratory laparotomy.

This patient's presentation of high fever, severe hypotension, tachycardia, and a rigid, diffusely tender abdomen with rebound tenderness on postoperative day 5 is highly suspicious for an anastomotic leak resulting in generalized peritonitis and septic shock. In any postoperative patient who develops a distinct 'acute abdomen' accompanied by hemodynamic instability, the definitive management is immediate surgical exploration (emergent exploratory laparotomy). While initial medical resuscitation with intravenous fluids and broad-spectrum antibiotics has been started, it serves only as a bridge to mandatory mechanical source control. Delaying surgery for advanced imaging or attempting conservative measures significantly increases mortality.

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Analyze the patient's clinical signs and vital signs.

The patient has fever, significant hypotension, tachycardia, leukocytosis with a left shift, and elevated lactate, indicating septic shock.

Recognizing hemodynamic instability and shock is critical for prioritizing immediate interventions over diagnostic testing.

Evaluate the abdominal examination findings in the context of recent surgery.

Diffuse tenderness, involuntary guarding, and rebound tenderness on postoperative day 5 after a bowel resection strongly suggest an anastomotic leak leading to generalized peritonitis.

These classic "acute abdomen" signs indicate a surgical emergency where intra-abdominal contents are actively contaminating the peritoneal cavity.

Determine the definitive treatment for an unstable patient with peritonitis.

Emergent exploratory laparotomy is required for source control, washout, and repair/diversion.

While antibiotics and fluids are necessary adjuncts, they cannot substitute for mechanical source control. Advanced imaging (like CT) is contraindicated due to the patient's hemodynamic instability.

Anahtar Kavram

Patients presenting with generalized peritonitis and hemodynamic instability following abdominal surgery require immediate emergent exploratory laparotomy for source control.

Soru

Cevap

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