This prospective, randomized, 'blind' study with guinea-pigs was performed to assess the possible benefit of 6% dextran 70 (molecular weight 70 000) in the prevention of post-operative intra-abdominal adhesions and recurrent adhesions after adhesiolysis. In 50 guinea-pigs lesions for inducing adhesions were applied at the end of the uterine horn. On the right side a strip lesion was made and on the left side an end-to-end anastomosis was performed after section. Before closing the peritoneum 20 ml 6% dextran 70 (N = 25) or saline (N = 25) were introduced into the peritoneal cavity. A second laparotomy 4 weeks later showed no differences in adhesion formation in the animals treated with 6% dextran 70 and saline. In the animals with adhesions adhesiolysis was performed and 6% dextran 70 or saline was left in the peritoneal cavity. Again no beneficial effect of dextran was seen. The end-to-end procedure appeared to be far more suitable for producing adhesions than was the strip lesion.
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