A 59-year-old man is evaluated in the intensive care unit on postoperative day 5 following… — USMLE Step 2 CK

A 59-year-old man is evaluated in the intensive care unit on postoperative day 5 following a partial gastrectomy with Billroth II reconstruction for a perforated peptic ulcer. Over the past 3 hours, he has become increasingly confused and agitated. His temperature is $39.5^\circ\text{C}$ ( $103.1^\circ\text{F}$ ), blood pressure is $76/42\text{ mmHg}$ , pulse is $134/\text{min}$ , and respirations are $26/\text{min}$ . Pulse oximetry shows $94\%$ on room air. Central venous pressure is $3\text{ cm H}_2\text{O}$ . Physical examination reveals a rigid, diffusely tender abdomen with involuntary guarding and generalized rebound tenderness. The surgical dressing is saturated with bilious fluid. Laboratory studies show a leukocyte count of $24,000/\text{mm}^3$ with $18\%$ bands. Arterial blood gas analysis on room air reveals a pH of $7.22$ , $\text{pCO}_2$ of $32\text{ mmHg}$ , and $\text{pO}_2$ of $78\text{ mmHg}$ . Which of the following are the most appropriate immediate steps in the management of this patient? (Select 2 answers)

Intravenous crystalloid resuscitation and broad-spectrum antimicrobial therapyCevap
Immediate exploratory laparotomyCevap
C
Computed tomography of the abdomen and pelvis with intravenous contrast
D
Intravenous administration of a loop diuretic
E
Empiric initiation of narrow-spectrum antimicrobial therapy targeting Methicillin-resistant Staphylococcus aureus

Cevap

The correct steps are intravenous crystalloid resuscitation coupled with broad-spectrum antimicrobial therapy, alongside immediate exploratory laparotomy.

This patient is presenting with septic shock secondary to secondary peritonitis, most likely from an anastomotic leak following his recent gastric surgery. This is evidenced by a high fever, profound hypotension, tachycardia, tachypnea, altered mental status, and a rigid, board-like abdomen with bilious wound drainage. The management of an unstable acute surgical abdomen requires two immediate, concurrent actions. First, the patient must receive aggressive fluid resuscitation with intravenous crystalloids to restore intravascular volume, along with broad-spectrum antibiotics to cover enteric flora (gram-negative rods and anaerobes). Second, the patient must be taken directly to the operating room for an immediate exploratory laparotomy to achieve source control (e.g., peritoneal washout, repair, or diversion of the leak).

Adım Adım Çözüm

Interpret the clinical presentation and vital signs.

The patient is in septic shock (hypotension, tachycardia, fever, confusion, low central venous pressure) and has generalized peritonitis (rigid abdomen, rebound tenderness) on postoperative day 5.

Identifying the shock phenotype and acute abdomen confirms an intra-abdominal catastrophe, likely an anastomotic leak given the bilious drainage.

Determine the medical stabilization required.

Intravenous crystalloids and broad-spectrum antibiotics covering enteric pathogens must be initiated immediately.

Septic shock causes profound vasodilation and capillary leak, necessitating aggressive volume resuscitation and immediate antimicrobial therapy to improve survival.

Determine the definitive surgical management.

The patient requires immediate exploratory laparotomy.

In the setting of hemodynamic instability and overt peritonitis, emergent surgical source control is required without waiting for confirmatory imaging.

Anahtar Kavram

Management of postoperative anastomotic leak presenting with unstable septic shock requires immediate dual intervention: aggressive medical resuscitation (fluids, broad-spectrum antibiotics) and emergent surgical source control (laparotomy) without prior imaging.

Soru

Cevap

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Anahtar Kavram

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