[Laparoscopic appendectomy in the adult]

Douleurs aiguës de la fosse iliaque droite: intérêt de la surveillance clinique hospitalière

INTRODUCTION

Because of the potential severity of acute appendicitis, many authors recommend the broad use of appendectomy. In this case, 15 to 20% of appendectomies are ultimately found to have been unnecessary. Hospital observation with repeated clinical and laboratory exams can be useful for patients with atypical clinical presentation. This paper assesses our approach, in which some patients with pain in the right iliac fossa (RIF) are admitted for observation before a decision about appendectomy.

PATIENTS AND METHODS

All patients (205 cases) admitted from March 2002 through February 2003 for acute abdominal pain of the RIF were included in this prospective study. The 120 women and 85 men (sex ratio=0.7) had a mean age of 27 years. We classified the patients into 3 groups: those who had an emergency appendectomy, those who had surgery after an observation period, and those discharged without appendectomy after observation.

RESULTS

The first group included 110 patients: 63% had a (rectal) temperature greater than 38 degrees C; 44% had guarding of the RIF and 87% elevated white blood cell counts (>10000/mm3). At surgery, appendicitis was diagnosed in 92%. After a mean delay of 36 hours of observation, 50 of the patients in the second group underwent surgery: 44% with (rectal) temperature > 38 degrees C, RIF guarding in 8%, and elevated white blood cell count (>10000/mm3) in 74%. In this group, 94% were diagnosed with appendicitis during surgery. Forty-five patients were discharged without surgery after 36 hours of observation.

COMMENTARY

In this study, pain and RIF guarding, associated with temperature greater than 38 degrees C and elevated white blood cell counts, were predictive of appendicitis in 96% of cases. Admission for observation of patients with atypical presentation avoided 45 unnecessary appendectomies (22%).

[Suspected acute appendicitis. Role of enhanced helical computed tomography. Prospective study of 100 patients]

AIM OF STUDY

To assess the diagnosis accuracy of helical computed tomography (CT) in patients with suspected appendicitis.

PATIENTS AND METHODS

This prospective study included 100 consecutive patients hospitalized for suspected appendicitis. There were 57 men and 43 women with a median age of 30 years (range: 17-91). An enhanced helical CT was performed at admission, without digestive opacification. Four criteria were interpreted as positive signs for appendicitis: appendix enlarged > or = 7 mm, right lower quadrant inflammation, stercorolith, and peri-appendicular collection. The patient was managed by the surgeon without knowing the result of CT. The final diagnosis was made pathologically.

RESULTS

Eighty-one patients were operated on laparoscopically for suspected appendicitis. Intraoperative diagnosis was corrected in three cases and 78 appendectomies were performed (73 histological appendicitis, six normal appendix). Final diagnosis was a medical disease in 19 patients. The findings of 67 CT were interpreted as positive (63 true positive and four false positive) and the findings of 33 CT were interpreted as negative (24 true negative, nine false negative). Sensitivity was 87%, specificity was 86%, positive predictive value was 94%, and negative predictive value was 73%. If the nine false negative cases with minimal lesions at pathological examination were considered as true negative, the rates would be 100%, 89%, 94%, 100%, respectively.

CONCLUSION

Enhanced helical CT is a good imaging diagnostic tool for suspected appendicitis. It may reduce the number of patients admitted for observation and decrease the rate of negative appendectomy.