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Ischemia-reperfusion Model of Acute Kidney Injury and Post Injury Fibrosis in Mice
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Poorly functioning kidneys recover from ischemia after partial nephrectomy as well as strongly functioning kidneys.

Maria C Mir1, Toshio Takagi1, Rebecca A Campbell1

  • 1Glickman Urological Kidney Institute, Cleveland Clinic, Cleveland, Ohio.

The Journal of Urology
|March 25, 2014
PubMed
Summary

Kidney function recovery after partial nephrectomy is excellent, even for poorly functioning kidneys. The amount of kidney tissue preserved is the key factor in determining postoperative kidney function.

Keywords:
chronicischemiakidneynephrectomyrecovery of functionrenal insufficiency

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Area of Science:

  • Nephrology
  • Urology
  • Surgical Oncology

Background:

  • Partial nephrectomy is a common procedure for kidney tumors.
  • Kidney function preservation is crucial for patient outcomes.
  • The impact of preoperative kidney function on recovery from ischemia during partial nephrectomy is not fully understood.

Purpose of the Study:

  • To evaluate the recovery of kidney function after partial nephrectomy.
  • To determine if preoperative kidney function affects recovery from ischemia.
  • To identify factors influencing postoperative glomerular filtration rate.

Main Methods:

  • Retrospective analysis of 155 partial nephrectomy patients.
  • Preoperative and postoperative computerized tomography (CT) for parenchymal volume measurement.
  • Glomerular filtration rate (GFR) and split renal function (renal scan) measurements.
  • Calculation of ischemia recovery rate (percent GFR saved/percent volume saved).

Main Results:

  • Median parenchymal volume saved was 83%, with median GFR saved at 80%.
  • Overall median recovery from ischemia was 95% (100% for cold ischemia, 92% for warm ischemia).
  • Recovery from ischemia was similar across all preoperative estimated GFR levels, including in the warm ischemia subgroup.

Conclusions:

  • Parenchyma preservation is the primary determinant of postoperative GFR after partial nephrectomy.
  • Kidneys, even those with poor function, demonstrate robust recovery from ischemic insult.
  • Limited warm ischemia or hypothermia facilitates good functional recovery proportional to preserved parenchyma.