95 Evaluating The Rate, The Predictors And The Outcomes Of Patients With Negative Appendectomy(NAR)

Abstract

Introduction Appendectomy is associated with complications and negative appendicectomy. We evaluated the rate and predictors of NAR in a cohort. Method Patients' data who underwent emergency appendicectomies over a year was analysed. A definition of NA; absence of inflammatory cells in the appendix. The NAR was calculated using (NAR-SDC) and (NAR-STC). Leucocytosis was a total WBC >11000/mm3, elevated CPR >5 mg/L. Results 372 patients were included. Median durations of symptoms 2 days. The mean admission WBC, CRP and serum bilirubin levels were 12,600 (3000-38000)/mm3, 66.9 (1-323) mg/L and 12.7 (4-38) µmol/L respectively. Laparoscopic appendectomy was performed in 93.5% with a conversion rate of 4.6%.NAR-SDC was 10.2% and NAR-STC was 25.8%. NAR was higher in females than males (39.4% versus 11.1%; p-value 0.0001). Patients with NA were younger (p-value 0.0001), had lower WBC (p-value 0.014), CRP (p-value 0.0001) levels on admission. Female gender, duration of symptoms more than 3 days, lower WBC were found to be predictors of NAR. Conclusions NA is a problem in management of patients with acute right lower abdominal pain. Our NAR compared favourably with reported rates. Female gender, symptoms more than 3 days, lower WBC were predictors of NA.