Effect of residual tissue glue in forceps channel on cleaning and disinfection quality of endoscope

Abstract:

Objective To observe the residual tissue glue in forceps channel after endoscopic tissue glue injection, and evaluate the effect of residual tissue glue on the cleaning and disinfection quality of endoscope. Methods 41 pieces of gastroscopes used by patients who underwent endoscopic tissue glue injection in the digestive endoscopy center of a tertiary first-class hospital from June to August 2021 were randomly selected, residual of tissue glue in endoscopic forceps channel after cleaning and disinfection was observed with lumen detector visual method, and microbial detection was performed, qualified rate of cleaning and disinfection as well as bacterial colony distribution between endoscopes with and without residual tissue glue were compared. Results Among 41 forceps channel after endoscopic tissue glue injection, 28 (68.29%) had tissue glue residue after cleaning and disinfection. The residual sites of tissue glue were mainly 0-2 cm away from the outlet of forceps channel (n=23), most residual of tissue glue presented lumpy shape (n=23). Qualified rates of the initial cleaning and disinfection of 28 pieces of endoscopes with residual tissue glue and 13 pieces of endoscopes without residual tissue glue were 46.43% (n=13) and 100% respectively, there was significant difference in the initial cleaning and disinfection qualified rate between two groups (χ²=8.794, P=0.003). There was significant difference in the distribution of bacterial colony number between endoscope groups with and without residual tissue glue (Z=-3.767, P < 0.001). The qualified rate of repeated cleaning and disinfection of 28 pieces of endoscopes with residual tissue glue was 53.57% (n=15), there was no significant difference compared with qualified rate of the initial cleaning and disinfection of endoscopes with residual tissue glue (χ²=0.286, P=0.593). There was no significant difference between the number of bacterial colony in endoscopes with residual tissue glue after repeated cleaning and disinfection as well as the initial cleaning and disinfection (Z=-1.185, P=0.236). Conclusion Residual rate of tissue glue in forceps channel after endoscopic tissue glue injection is high, which leads to the high unqualified rate of cleaning and disinfection as well as high detection rate of bacteria of forceps channel, and reduces the quality of endoscopic cleaning and disinfection.