, Volume 11, Issue 11, pp 1417-1422
Date: 16 Aug 2007

Computed Tomography in the Diagnosis of Acute Appendicitis: Definitive or Detrimental?

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Abstract

Objectives

Utilization of computed tomography (CT) scans in patients with presumed appendicitis was evaluated at a single institution to determine the sensitivity of this diagnostic test and its effect on clinical outcome.

Methods

Adult patients (age > 17 years) with appendicitis were identified from hospital records. Findings at surgery, including the incidence of perforation, were correlated with imaging results.

Results

During a 3-year period, 411 patients underwent appendectomy for presumed acute appendicitis at our institution. Of these patients, 256 (62%) underwent preoperative CT, and the remaining 155 (38%) patients did not have imaging before the surgery. The time interval between arrival in the emergency room to time in the operating room was longer for patients who had preoperative imaging (8.2 ± 0.3 h) compared to those who did not (5.1 ± 0.2 h, p < 0.001). Moreover, this possible delay in intervention was associated with a higher rate of appendiceal perforation in the CT group (17 versus 8%, p = 0.017).

Conclusions

Preoperative CT scanning in patients with presumed appendicitis should be used selectively as widespread utilization may adversely affect outcomes. The potential negative impact of CT imaging includes a delay in operative intervention and a potentially higher perforation rate.

This paper was presented at the SSAT Annual Meeting, May 19–23, 2007.