Comparison of E. coli Infiltration between New Synthetic Absorbable Sutures

PURPOSE: The proper selection of suture is very important to minimize infection after gastrointestinal anastomosis and closure, which is one of the causes of postoperative complications such as leakage and stricture, etc, in the surgical field. Thus this study focuses on which suture can reduce bacterial infection after surgical operation by comparing in vitro microbial infiltration rates of three synthetic absorbable sutures and that of silk - a relatively absorbable material, using E. coli. METHODS: Four different, sterilized kinds of absorbable sutures were used for two experiments. In experiment 1, the cut-off suture was directly applied to the standard method agar plate and cultured for observation. In experiment 2, the cut-off suture was diluted with 1 ml of tryptic soy broth to be smeared and cultured in the standard method agar plate and counted using a spectrophotometer. RESULTS: The first experiment revealed that bacterial growth was not observed in the monofilament and antibiotic-coated multifilament sutures, while the other sutures of multifilament structure were invaded by bacteria. In the second experiment, counting and averaging the colony from five plates of each test showed that the number of E. coli of monofilament suture, antibiotics-coated polyglactin, polyglactin and silk were 0+/-0, 39.3+/-14.4, 208.6+/-76.6, 59.4+/-26.7, respectively. CONCLUSION: Sutures of monofilament structure are believed to be a relatively safe material that can be used for gastrointestinal anastomosis and closure since it has lower bacterial infiltration rates than sutures of multifilament structure.

A Comparative Study of Tensile Strength in Vitro and Histologic Reaction on Rabbits between TRISORB Suture Materials and Traditional Suture Materials ( Dexon , Vicryl , Medifit ) / 대한산부인과학회잡지

Objective: Our purpost was to study effectiveness and clinical application of TRISO-RB suture materials and the find the most appropriate coating ingredient. The tensile str-ength and histologic reaction of the TRISORB are compared with those of traditional ma-terials such as Dexon , Vicryl , and Medifit . Study design:In vivo, 20 female rabbits were observed for histologic reaction at di- fferent time intervals after they were implanted with suture material. In vitro, Tensile str- ength was compared among the four suture materials after boiling in distilled water at 80degrees C. It was also compared with the tensile strength in phosphate buffer solution of pH 7.4 at 37degrees C. Results: Histologic reaction was remarkable with Medifit suture material. There was no significant differences among the other suture materials. TRISORB with A coating ingredient showed the least histologic reaction. TRISORB suture materials showed simi- lar tensile strength as those of traditional suture materials in vitro. Conclusion: TRISORB suture material is consists of same polyglycolic acid as trad- itional synthetic absorbable suture materials. It shows no significant differences in vivo and in vitro when compared with other traditional materials. It is considered to be applic- able with humans.