A nurse is assessing a patient who underwent exploratory laparotomy for bowel obstruction 48 hours ago. Which assessment finding would be the MOST concerning and require immediate intervention?

Scenario: A patient is 48 hours post-exploratory laparotomy for bowel obstruction. The nurse's priority is early identification of life-threatening complications like anastomotic leak and peritonitis.

• Pain: Sudden onset of severe, diffuse abdominal pain that is disproportionate to expected postoperative discomfort.
• Abdomen: A rigid, board-like abdomen with involuntary guarding, which is the hallmark sign of peritonitis.
• Bowel Sounds: Absent bowel sounds in all four quadrants, indicating a paralytic ileus secondary to peritoneal inflammation.

1. Stop all oral intake and ensure NPO status.
2. Notify the surgeon or rapid response team immediately with a clear, concise report of the assessment findings.
3. Prepare the patient for emergency diagnostic tests, such as a CT scan with contrast, and potential return to the operating room.
4. Initiate frequent vital sign monitoring for early signs of septic shock (tachycardia, hypotension, fever).
5. Establish or maintain IV access and prepare for fluid resuscitation and broad-spectrum antibiotic administration as prescribed.

Clinical Pearl: Differentiate this emergency from normal postoperative findings. A low-grade fever, mild incisional tenderness, and stable vital signs are expected. The combination of sudden severe pain and a rigid abdomen is a surgical emergency until proven otherwise.