Analysis of Native Kidney Function Recovery With Renal Scintigraphy Following Simultaneous Liver-Kidney...

Area of Science:

• Nephrology
• Transplantation Medicine
• Hepatology

Background:

• Patients undergoing simultaneous liver-kidney transplantation (SLK) often have pre-existing impaired native kidney function.
• The extent to which native kidney function recovers after SLK is not well understood.
• Characterizing native kidney function post-SLK is crucial for understanding overall renal recovery.

Purpose of the Study:

• To investigate the return and contribution of native kidney function following SLK.
• To identify factors associated with native kidney function improvement after SLK.

Main Methods:

• Technetium-99m-mercaptoacetyltriglycine renal scintigraphy was used to assess kidney function post-SLK.
• Estimated glomerular filtration rate (eGFR) contributions from native kidneys were calculated.
• Patients were stratified based on native kidney eGFR (≥30 vs. <30 mL/min/1.73 m²), and regression analysis was performed.

Main Results:

• Native kidneys contributed an average of 51.1% to overall kidney function post-SLK, with a mean native eGFR of 44.5 mL/min/1.73 m².
• A significant improvement in native kidney eGFR was observed (30.3 mL/min/1.73 m², P < 0.001).
• Hepatorenal syndrome as the sole cause of kidney dysfunction was 100% specific for native kidney eGFR >30 mL/min/1.73 m² and predicted improvement (P = 0.03).

Conclusions:

• Significant recovery of native kidney function is common after SLK.
• Hepatorenal syndrome is a key predictor of native kidney function improvement post-transplant.
• Further research is needed to explore transplant strategies involving native kidney function surveillance.