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Ann Thorac Surg 1991;51:754-758
© 1991 The Society of Thoracic Surgeons

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Articles

Pulmonary hypertension and polymorphonuclear leukocyte elastase after esophageal cancer operations

First Department of Surgery, Iwate Medical University, School of Medicine, Morioka, Japan

Accepted for publication December 28, 1990.

^_* Address reprint requests to Dr Sato, First Department of Surgery, Iwate Medical University, School of Medicine, 19-1 Uchimaru, Morioka, Japan 020.

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 µg/L preoperatively to 449 ± 56 µg/L at 6 hours postoperatively (p < 0.01), whereas the mean plasma fibronectin concentration decreased from 490 ± 70 µg/mL preoperatively to 265 ± 81 µg/mL on postoperative day 2 (p < 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 < 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 posioperatively was lower (275 ± 66 µg/L; p < 0.01) and the fibronectin level on postoperative days 1 and 2, higher (p < 0.05). A lower pulmonary vascular resistance was noted into day 2 (p < 0.05). Our results suggest that PMN elastase may participate in the development of postoperative pulmonary impairment.

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