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Living kidney donor assessment: Kidney length vs differential function
Jacob A Akoh1, Katharina J Schumacher1
1Department of Surgery, Derriford Hospital, University Hospitals Plymouth NHS Trust, Plymouth PL6 8DH, Devon, United Kingdom.
World Journal of Transplantation
|August 4, 2020
Summary
Kidney length difference alone is insufficient for selecting a donor kidney. Differential function measurement is crucial for ensuring donor safety and recipient outcomes in living kidney donation.
Area of Science:
- Nephrology
- Transplant Surgery
- Medical Imaging
Background:
- Assessing living kidney donor suitability requires determining individual kidney function.
- Kidney length difference may suggest functional disparity, but its predictive value is uncertain.
Purpose of the Study:
- To evaluate the efficacy of kidney length difference in guiding the selection of which kidney to donate.
- To determine if kidney length can replace differential function measurements in potential living kidney donors.
Main Methods:
- Retrospective analysis of 285 potential living kidney donors (2009-2018).
- Data included kidney length (CT/ultrasonography), glomerular filtration rate, and mercapto acetyl tri glycine split function.
- Pearson's correlation coefficient assessed the relationship between kidney length difference and differential renal function.
Main Results:
- A weak correlation (0.1630, P=0.0058) was found between kidney length difference and differential kidney function.
- In donors with significant functional differences (>10%), most had minimal or no length difference (<2 cm).
- Using kidney length difference (>1 cm or >2 cm) as a sole criterion led to inaccurate predictions and potential false reassurance.
Conclusions:
- Kidney length difference is not a reliable standalone predictor of differential renal function in living kidney donors.
- Measurement of differential renal function remains essential for safe donor kidney selection.
- Further research, including a randomized controlled trial, is needed to definitively resolve this issue.
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