Bilateral versus single lung transplantation for chronic obstructive pulmonary disease

Area of Science:

• Thoracic surgery
• Pulmonary medicine
• Transplantation immunology

Background:

• Single lung transplantation is the standard for end-stage chronic obstructive pulmonary disease (COPD), despite ventilation/perfusion mismatch.
• The study investigates if bilateral sequential lung transplantation offers superior outcomes for COPD patients.

Purpose of the Study:

• To compare the short- and intermediate-term results of bilateral sequential lung transplantation versus single lung transplantation in COPD patients.
• To evaluate survival rates, mortality, graft failure, and functional outcomes.

Main Methods:

• A retrospective analysis of 126 consecutive lung transplants (76 for COPD) performed between November 1991 and March 1996.
• Patients were divided into single (n=47) and bilateral (n=29) lung transplantation groups.
• Outcomes including 60-day mortality, Kaplan-Meier survival, pulmonary function tests, and 6-minute walk tests were assessed.

Main Results:

• Bilateral lung transplantation demonstrated significantly lower 60-day mortality (3.45% vs. 21.3%) and improved 1- and 2-year survival rates (90% vs. 71.1% and 63.3%, respectively).
• Primary graft failure was significantly reduced in the bilateral group (p=0.049).
• Both transplantation types improved pulmonary function (forced expiratory volume in 1 second) and exercise capacity (6-minute walk test).

Conclusions:

• Bilateral lung transplantation significantly enhances forced expiratory volume in 1 second and 6-minute walk test performance compared to single lung transplantation.
• The study indicates improved perioperative mortality and Kaplan-Meier survival up to 3 years with bilateral lung transplantation for COPD.
• Reduced primary graft failure is likely responsible for the superior outcomes observed with bilateral lung transplantation.