Impact of Bariatric Surgery on Outcomes Following Lung Transplantation

Overview

This propensity-matched case series evaluated lung transplant recipients with prior bariatric surgery compared to matched controls. Findings suggest comparable early and mid-term outcomes, including survival and rejection rates, despite concerns about gastroesophageal reflux disease in bariatric patients.

Background

Lung transplantation (LTx) is the definitive treatment for end-stage lung disease but is complicated by risks such as chronic lung allograft rejection and early postoperative complications. Obesity is common among LTx candidates and often contraindicates transplantation due to increased risks. Bariatric surgery offers substantial weight loss and may improve transplant candidacy, but its impact on LTx outcomes remains unclear. This study compares outcomes in patients with prior bariatric surgery to matched controls to inform clinical decision-making.

Data Highlights

Key Findings

• Patients with prior bariatric surgery underwent bilateral lung transplantation with a median age of 65 years and majority female.
• Propensity score matching accounted for 12 clinical parameters ensuring comparable baseline characteristics between groups.
• Early postoperative complications such as primary graft dysfunction, antibody-mediated rejection, and acute cellular rejection were assessed within one year post-LTx.
• Chronic lung allograft dysfunction-free survival and overall survival were analyzed via Kaplan–Meier methods.
• Immunosuppressive regimens were consistent across groups, including induction and maintenance therapies.
• Despite concerns about increased gastroesophageal reflux disease in bariatric patients, no significant differences in mid-term outcomes were observed compared to controls.

Clinical Implications

Pre-transplant bariatric surgery may be a viable strategy to optimize obese lung transplant candidates without adversely affecting early or mid-term transplant outcomes. Clinicians should consider bariatric surgery history when evaluating LTx candidates but remain vigilant for potential esophageal complications. Standard immunosuppressive protocols remain appropriate in this population.

Conclusion

Lung transplant recipients with prior bariatric surgery demonstrate comparable early and mid-term outcomes to matched controls, supporting the feasibility of bariatric surgery as a pre-transplant intervention in selected patients. Further studies with larger cohorts are warranted to confirm these findings.

References

1. International Society for Heart and Lung Transplantation Guidelines
2. Study Institutional Review Board PHXU-21–500-136–73-18, 2023