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Lung function after prolonged lung preservation.

M Hachida1, D L Morton

  • 1Division of Surgical Oncology, Armand Hammer Laboratories, University of California, Los Angeles School of Medicine.

The Journal of Thoracic and Cardiovascular Surgery
|June 1, 1989
PubMed
Summary
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Extending lung preservation to 12 hours using the UCLA formula caused temporary declines in oxygen exchange and lung compliance. Function returned to normal within two weeks, indicating potential for longer preservation.

Area of Science:

  • Transplantation Biology
  • Cardiovascular and Respiratory System Sciences

Background:

  • Lung preservation solutions are critical for successful transplantation.
  • The UCLA formula, a glucose-insulin-potassium solution with verapamil, previously showed promise for lung preservation.

Purpose of the Study:

  • To evaluate lung function after 12 hours of preservation using the UCLA formula compared to 6 hours.
  • To assess the long-term functional recovery of transplanted lungs after extended preservation.

Main Methods:

  • Canine left lung autotransplantation model.
  • Comparison of 6-hour (Group A) versus 12-hour (Group B) preservation with UCLA formula.
  • Postoperative monitoring of oxygen tension, pulmonary vascular resistance, lung compliance, and perfusion scintigraphy.

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Main Results:

  • Group B (12-hour preservation) showed transient deterioration in oxygen tension and lung compliance from postoperative days 3-4.
  • Pulmonary vascular resistance was elevated in Group B but normalized by day 14.
  • Lung perfusion ratios were similar between groups, suggesting preserved vascular integrity.

Conclusions:

  • Twelve hours of lung preservation with the UCLA formula leads to temporary functional deficits.
  • Impaired oxygen exchange and reduced lung compliance were observed after 12-hour preservation.
  • Lung function recovered to normal levels within two weeks, supporting the potential of this preservation strategy.