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Every minute counts when the renal hilum is clamped during partial nephrectomy
R Houston Thompson1, Brian R Lane, Christine M Lohse
1Department of Urology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA. Thompson.robert@mayo.edu
European Urology
|September 10, 2010
Summary
Every minute of warm ischemia during partial nephrectomy impacts kidney function. Longer warm ischemia times are linked to acute renal failure and chronic kidney disease, emphasizing the need to minimize clamping duration.
Area of Science:
- Nephrology
- Urology
- Surgical Oncology
Background:
- The optimal duration of warm ischemia during partial nephrectomy is not well-established.
- Partial nephrectomy is a key procedure for kidney tumor management.
Purpose of the Study:
- To investigate the association between warm ischemia time and short- and long-term renal outcomes in patients with a solitary kidney undergoing partial nephrectomy.
Main Methods:
- Retrospective analysis of 362 patients with a solitary kidney who underwent partial nephrectomy with warm ischemia.
- Evaluation of renal function using logistic and Cox regression models, analyzing ischemia time as a continuous variable and in 5-min increments.
Main Results:
- Longer warm ischemia time was significantly associated with postoperative acute renal failure (ARF) and reduced glomerular filtration rate (GFR).
- Extended warm ischemia also correlated with the development of new-onset stage IV chronic kidney disease during follow-up.
- A warm ischemia time cut-point of 25 minutes best distinguished patients with adverse renal outcomes.
Conclusions:
- Increased warm ischemia duration during partial nephrectomy poses risks for both short-term and long-term renal function.
- Minimizing renal hilum clamping time is crucial to preserve kidney health in patients undergoing partial nephrectomy.
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