Optimal suture materials for contaminated gastrointestinal surgery: does infection influence the decrease of the...

Area of Science:

• Biomaterials Science
• Surgical Innovation
• Wound Healing Research

Background:

• Suture material selection depends on absorbability, structure, tensile strength, and tissue type.
• Absorbable sutures undergo hydrolysis, but infection's impact on this process and tensile strength is unclear.

Purpose of the Study:

• To investigate the influence of infection on the hydrolysis and tensile strength reduction of various suture materials.
• To compare the behavior of absorbable and non-absorbable sutures in both clean and contaminated environments.

Main Methods:

• Four suture types (silk, polypropylene, polyglactin 910, polydioxanone) were implanted in rats.
• Sutures were exposed to either a bacterial suspension (E. coli + B. fragilis) or saline.
• Tensile strength was assessed at 1, 2, 4, and 8 weeks post-implantation.

Main Results:

• Silk sutures showed increased inflammation in contaminated conditions (p=0.03); other sutures had no significant difference.
• All sutures exhibited decreased tensile strength over time.
• No significant difference in tensile strength reduction was observed between clean and contaminated conditions for any suture type.

Conclusions:

• Infection did not significantly alter the rate of tensile strength reduction in the tested suture materials.
• The findings suggest that contamination does not critically impact suture strength degradation over time, even for absorbable types.