Renal hemodynamics after lung transplantation. A prospective study

Area of Science:

• Nephrology
• Transplantation Medicine
• Pulmonology

Background:

• Renal function impairment is common post-solid organ transplantation, primarily due to cyclosporine nephrotoxicity.
• Patients with severe respiratory failure often have pre-existing renal impairment, potentially increasing risk after lung transplantation.
• Understanding renal hemodynamics is crucial for managing lung transplant recipients.

Purpose of the Study:

• To investigate changes in renal hemodynamics and function after lung transplantation.
• To determine the impact of pre-transplantation renal function on post-transplantation outcomes.
• To assess whether pre-existing renal impairment contraindicates lung transplantation.

Main Methods:

• Renal hemodynamics were measured in 44 lung transplant candidates before and up to 30 months post-transplantation.
• Glomerular filtration rate (GFR), effective renal blood flow (ERBF), and effective renal plasma flow (ERPF) were assessed.
• Correlations between pre-transplantation and post-transplantation renal function parameters were analyzed.

Main Results:

• A significant decline in GFR (33-42%) and ERBF (22%) was observed post-transplantation.
• Increased blood pressure and renal vascular resistance were consistent with cyclosporine effects.
• Patients with pre-transplantation renal impairment showed less pronounced GFR and ERPF decline post-transplant.

Conclusions:

• Lung transplantation leads to a decline in renal function, influenced by cyclosporine toxicity and respiratory status improvement.
• Pre-existing renal impairment and vasoconstriction were associated with a less severe post-transplant renal function decrease.
• Pre-transplantation renal impairment should not be considered a contraindication for lung transplantation.