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Human Reproduction, Vol 13, 1486-1489, Copyright © 1998 by Oxford University Press

ARTICLES

Postoperative adhesion prevention with low-dose aspirin: effect through the selective inhibition of thromboxane production

L Muzii, R Marana, L Brunetti, F Margutti, M Vacca and S Mancuso
Department of Obstetrics and Gynaecology, Catholic University of the Sacred Heart, Rome, Italy.

The aim of the present study was to evaluate the efficacy of low-dose versus high-dose aspirin in the prevention of postoperative adhesion formation. Forty New Zealand White rabbits were randomized into three groups: low-dose aspirin (1.7 mg/kg per day for 5 days starting on the day of surgery), high-dose aspirin (28.0 mg/kg per day), and controls. The rabbits underwent a standardized surgical injury on the ovary, uterine horn and abdominal wall on one side at laparotomy. On postoperative day 21, a second-look laparotomy was performed for the evaluation of postoperative adhesions. In five animals in each group, peritoneal fluid samples were collected at initial surgery, then through an additional 2 cm incision performed on postoperative day 3, and at second-look laparotomy. The peritoneal concentrations of thromboxane B2 and 6-keto-prostaglandin F1alpha (the stable hydrolysis product of prostacyclin) were measured by radioimmunoassay. At second- look laparotomy, the adhesion formation rate was 46% in the low-dose aspirin group, 77% in the high-dose group, and 100% in the control group. The adhesion score in the low-dose group was significantly lower (P < 0.01) than in the high-dose and control groups. Peritoneal thromboxane decreased significantly during treatment in both low-dose and high-dose aspirin groups, whereas prostacyclin decreased only in the high-dose group. Postoperative adhesion reduction observed in this study with low-dose aspirin treatment could be due to the selective inhibition of thromboxane over prostacyclin production.
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N. Yesildaglar and P.R. Koninckx
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Hum. Reprod., March 1, 2000; 15(3): 687 - 691.
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