Acute appendicitis is most common abdominal surgical condition which is more common in young males and white races.But its diagnosis can be difficult because it can mimic other abdominal conditions. Various scoring systems/ techniques have been devised to assist in its diagnosis specially in equivocal cases. Accuracy of ModifiedAlvarado score has been reported low in Asian population and RIPASA score was devised specially for Asian population. The aims of this study were to evaluate the sensitivity and specificity of RIPASA score and ModifiedAlvarado score in diagnosis of acute appendicitis. This study was carried out in I.G. medical college teaching hospital Shimla from July 2015 to August2018 in patients with the diagnosis of acute appendicitis. A total of 200 cases that underwent surgery for suspected acute appendicitis were included. Modified Alvarado score and RIPASA scores were computed for each patient and the suggested cutoff value 7.5 for RIPASA and 7 for MAS were used to find out the accuracy of these scores. Post-operative histopathological report was correlated with different scoring systems. RIPASA scoring system correctlydiagnosed histologically proved ac. appendicitis in 97.17% patients&had specificity of 69.56% with cut of value of 7.5. While MAS sensitivity for diagnosing ac.appendicitis was 64.97% with cut off value of 7 and had 47.82% specificity. RIPASA scoring system is more accurate,convenient as compared to modified Alvarado score in our studied population.

Keywords : RIPASA score, Modified Alvarado (MAS) scoring systems, ac. Appendicitis