Comprehensive evaluation of renal function in the transplanted kidney.

Area of Science:

• Nephrology
• Transplant Surgery
• Nuclear Medicine

Background:

• Accurate assessment of renal function is crucial for kidney transplant recipients.
• Early detection of complications like rejection or necrosis improves patient outcomes.

Purpose of the Study:

• To develop and validate a comprehensive renal function test for differentiating clinical entities in kidney transplant patients.
• To assess the test's ability to predict kidney allograft fate before clinical manifestation.

Main Methods:

• Analysis of orthoidohippurate kinetics through a comprehensive renal function test.
• Measurements included effective renal plasma flow (ERPF), sequential scintigraphy, excretory index (EI), and residual urine volume.
• The test was performed 223 times on 86 renal transplant patients and 44 times on 22 donors.

Main Results:

• The test successfully differentiated five clinical entities: normal function, acute tubular necrosis, cell-mediated rejection, humoral rejection, and postrenal obstruction.
• The test accurately predicted kidney allograft fate up to one week before subclinical manifestations were evident by other techniques.

Conclusions:

• The comprehensive renal function test offers early and accurate diagnosis of kidney transplant complications.
• This method allows for timely intervention, potentially improving graft survival rates.