Analysis of factors associated with Ttube sinus tract formation after common bile duct exploration and Ttube drainage

Objective:To explore the risk factors affecting Ttube sinus tract formation after common bile duct exploration and Ttube drainage by spiral computed tomography (SCT)examination.
Methods:The clinical data of 465 patients undergoing common bile duct exploration and Ttube drainage at the Affiliated Hospital of Youjiang Medical College for Nationalities from May 2011 to December 2013 were retrospectively analyzed. The residual stones and biliary stricture were detected by Ttube cholangiography, and the Ttube sinus tract formation in all the patients was detected by SCT examination at postoperative week 2. 〖JP3〗The factors affecting sinus tract formation were analyzed, including gender, age, albumin (Alb), Creactive protein, alanine transaminase (ALT), total bilirubin (TBil), hemoglobin (Hb), surgical method, effusion around T tube, reoperation, diabetes. Univariate analysis was done using the chisquare test. Multivariate analysis was done using the Logistic regression.
Results Ttubes of 465 patients were clear without residual stones. Ttube in the 397 patients was removed when the sinus tract formation was confirmed by CT examination at postoperative week 2. Ttubes in other patients were removed when the
 sinus tract formation was detected by CT reexamination at postoperative week 4. In univariate analysis, Alb, surgery method, effusion around Ttube and diabetes were important factors affecting Ttube sinus tract formation (χ²=50.750, 7.671, 19.022, 15.373, P<0.05). Alb<30 g/L, laparoscopic surgery, effusion around Ttube and diabetes were independent risk factors affecting Ttube sinus tract formation in multivariate analysis ［Odds ratio=1.135, 0.493, 0.262, 0.363; 95% confidence interval: 1.061-1.214, 0.280-0.865, 0.104-0.658, 0.156-0.843, P<0.05］.
Conclusions:The Ttube removal is determined according to the sinus tract formation by CT examination at week 2 after common bile duct exploration and Ttube drainage. Alb<30 g/L, laparoscopic surgery, effusion around Ttube and diabetes are independent risk factors affecting Ttube sinus tract formation.