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The Annals of Thoracic Surgery, Vol 51, 754-758, Copyright © 1991 by The Society of Thoracic Surgeons

ARTICLES

Pulmonary hypertension and polymorphonuclear leukocyte elastase after esophageal cancer operations

N Sato, K Murakami, K Ishida, K Ikeda and K Saito
First Department of Surgery, Iwate Medical University, School of Medicine, Morioka, Japan.

To evaluate the role of polymorphonuclear leukocyte (PMN) elastase in pulmonary impairment occurring after operation for esophageal cancer, 10 patients were randomized preoperatively into two equal groups. One group received a placebo infusion and the other, an infusion of the PMN elastase inhibitor ulinastatin. In the placebo group, the mean plasma PMN elastase level increased from 154 +/- 23 micrograms/L preoperatively to 449 +/- 56 micrograms/L at 6 hours postoperatively (p less than 0.01), whereas the mean plasma fibronectin concentration decreased from 490 +/- 70 micrograms/mL preoperatively to 265 +/- 81 micrograms/L on postoperative day 2 (p less than 0.01). The mean pulmonary vascular resistance increased markedly from 151 +/- 24 dynes.s.cm-5.m-2 preoperatively to 284 +/- 76 dynes.s.cm-5.m-2 at 6 hours postoperatively (p less than 0.01). In the group given ulinastatin, 150,000 units every 12 hours from the start of the operation, the mean PMN elastase value at 6 hours postoperatively was lower (275 +/- 66 micrograms/L; p less than 0.01) and the fibronectin level on postoperative days 1 and 2, higher (p less than 0.05). A lower pulmonary vascular resistance was noted into day 2 (p less than 0.05). Our results suggest that PMN elastase may participate in the development of postoperative pulmonary impairment.

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