PANCE Gastrointestinal (GI) And Nutrition Practice Test

Which of the following is NOT part of the diagnostic criteria for toxic megacolon?

Radiographic evidence of colonic dilatation (>6 cm) Fever (>101.5°F) Blood pressure > 150/90 Heart rate > 120/min

Correct Answer:

Blood pressure > 150/90

Explanation:

Toxic megacolon is diagnosed by radiographic evidence of colonic dilation (>6 cm) plus systemic features of severe colitis. The systemic features used in the criteria include fever (>101.5°F), tachycardia (>120/min), leukocytosis, and anemia; dehydration or electrolyte disturbances are additional markers of severity, and hypotension can be present as part of the toxemia. A high blood pressure like 150/90 does not fit the diagnostic criteria and would not support the diagnosis. The other items described—the dilated colon on imaging, fever, and rapid heart rate—are consistent with the criteria, reflecting both the structural and systemic aspects of toxic megacolon.

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