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Updated: May 14, 2026
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The Mouse Isolated Perfused Kidney Technique
Published on: November 17, 2016
Feasibility of an Isolated Kidney Perfusion Model for Postmortem Interval Estimation in a Rabbit Model: A Pilot Study
Ramazan Temürkol1, Hülya Güler1, Ahsen Kaya1
1Department of Forensic Medicine, Faculty of Medicine, Ege University, Izmir 35100, Turkey.
Diagnostics (Basel, Switzerland)
|May 13, 2026
Summary
This study explored using isolated rabbit kidneys to estimate postmortem interval (PMI). Residual renal function did not correlate with time since death, indicating kidneys lose function rapidly after death.
Area of Science:
- Forensic Medicine
- Renal Physiology
- Postmortem Interval Estimation
Background:
- Estimating postmortem interval (PMI) is challenging, with limited exploration of organ-level functional changes.
- This study investigates ex vivo kidney perfusion to assess residual renal function as a potential PMI marker.
Purpose of the Study:
- To evaluate the feasibility of using isolated kidney perfusion to measure postmortem renal function.
- To determine if glomerular filtration and tubular solute handling can serve as chronological markers for PMI.
Main Methods:
- Sixteen rabbits were assigned to postmortem interval groups (1, 5, 10, 15 hours).
- Isolated kidneys were perfused using a crystalloid system to simulate postmortem decay.
- Renal function parameters (glomerular filtration, tubular handling) were measured and statistically analyzed at the subject level.
Main Results:
- No significant chronological variation in renal function parameters was observed across postmortem intervals (p > 0.05).
- Glomerular filtration was profoundly depressed in all groups.
- Active tubular reabsorption was absent, evidenced by negative reabsorption loads, indicating passive electrolyte leakage due to autolysis.
Conclusions:
- The isolated kidney perfusion model did not yield reproducible, time-dependent renal function for PMI estimation.
- Highly metabolic renal tissue rapidly loses functional capacity postmortem, unlike more resilient tissues like skeletal muscle.
- Future research should focus on the immediate postmortem period (0-1 hour) or advanced preservation techniques for supravital renal function studies.
