Anastomotic breaking strength and healing of anastomoses in rat intestine with and without chronic radiation damage.

• OBJECTIVE: To assess the influence of chronic radiation damage on anastomotic healing in the small bowel in rats.DESIGN: Controlled laboratory study.SETTING: University hospital, Sweden.MATERIAL: 90 male Sprague-Dawley rats.INTERVENTIONS: A short segment of the distal ileum was exteriorised and irradiated with a single dose (experimental group, n = 45) or exposed only (control group, n = 45). Twenty weeks later resection and anastomosis were done within this segment using 7/0 polypropylene.MAIN OUTCOME MEASURES: The anastomotic breaking strength, the amount of perianastomotic hydroxyproline, and the number of anastomotic complications.RESULTS: The breaking strength and the amount of perianastomotic hydroxyproline were higher in the irradiated than in the non-irradiated group. In contrast, anastomotic complications were significantly more common in irradiated animals.CONCLUSION: Anastomotic complications in irradiated intestine are not related to the amount of perianastomotic collagen or to breaking strength.

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MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Andra medicinska och farmaceutiska grundvetenskaper (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Other Basic Medicine (hsv//eng)

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