AN OBSERVATIONAL STUDY ON PREDICTION OF DIFFICULTIES DURING LAPROSCOPIC CHOLECYSTECTOMY IN CASES OF CHOLELITHIASIS BY PREOPERATIVE ULTRASONOGRAPHY

Abstract

BACKGROUND: Laparoscopic cholecystectomy has become the treatment of choice for cholelithiasis. Some reliable factors are needed to predict difficulties during laparoscopic cholecystectomy. So, our aim was to study various preoperative ultrasonographic parameters which may predict difficulties in performing laparoscopic cholecystectomy. METHOD: One twenty five patients of cholelithiasis admitted for elective laparoscopic cholecystectomy were studied. Preoperative ultrasonographic parameters such as gall bladder(GB) wall thickness, transverse diameter of GB, pericholecystic fluid collection, gall stone mobility, number of stones & size of largest stone, common bile duct(CBD) diameter and emphysematous cholecystitis were given a score of 0 or 1 based on findings being negative or positive respectively. Total score was correlated with the difficulties faced during laparoscopic cholecystectomy. RESULT: Out of 125 cases, 42(33.6%) cases were found to be difficult during laparoscopic cholecystectomy and 6 cases (4.8%) required conversion to open cholecystectomy. GB wall thickness (p value= 0.00001), transverse diameter of GB (p value= 0.001), pericholecystic fluid collection (p value= 0.00001), dilated CBD (p value=0.007), size of stone (p value= 0.007) found to be statistically significant in predicting difficulties during laparoscopic cholecystectomy. Higher the preoperative USG score, higher were the chances of difficult laparoscopic cholecystectomy and conversion to open cholecystectomy. CONCLUSION: Pre operative ultrasonography in the form of a formulated score is a good predictor of difficulties during laparoscopic cholecystectomy.