Parameters of Healing in Approximative Intestinal Anastomosis

 

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Abstract

Introduction: The restoration of bowel continuity using multiple classic anastomoses is mostly impossible in unstable critically ill extremely low birth weight neonates. The parameters of healing of approximative anastomoses in which integrity and continuity of bowel is achieved with limited number of stitches were evaluated in an experimental study. Material and Methods: Small bowel anastomoses were performed in twenty-two adult male rats. An approximative ileo-ileal anastomosis was performed with five seromuscular-interrupted sutures only; in the control group the anastomosis was performed with the conventional technique of interrupted sutures. The mechanical and biochemical parameters were compared. Results: All anastomoses in both groups healed well without obstruction. The mean operating time needed for an approximative anastomosis was shorter (16 ± 7.1 min versus 23.6 ± 6.2 min, p = 0.016). The strength of the approximative anastomoses on the 1st day after surgery was 55 ± 15 torr; the strength of the conventional anastomoses was 55 ± 42 torr. The strength of the approximative anastomoses after 7 days was 249 ± 39 torr; the strength of the conventional anastomoses was 218 ± 23 torr (p = 0.118). The activity of the collagenolytic enzymes matrix metalloproteinase-2 and matrix metalloproteinase-9 in the anastomotic area was significantly increased compared with the activity in samples of non-operated bowel. There was no significant difference in collagenolytic activity between both types of anastomoses. Conclusion: The approximative anastomosis is a time-saving alternative to conventional anastomoses with a comparable course of anastomotic healing, anastomotic strength, and changes in collagen metabolism.

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M.D., Ph.D. Michal Rygl

Department of Pediatric Surgery
Charles University in Prague – 2nd Medical School

V Uvalu 84

15006 Prague

Czech Republic

Email: mrygl@yahoo.com