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Baseline Vascular Pathology in Deceased Donor Kidneys: Differential Impact on Transplant Outcomes by Donor Type
Junichiro Sageshima1, Naeem Goussous1, Yvonne Kelly1
1Department of Surgery, University of California Davis Health, Sacramento, California, USA.
Insights
Kidney vascular pathology in deceased donors significantly worsens transplant outcomes, impacting graft survival and kidney function. Histological assessment is crucial for better donor selection and patient management.
Area of Science:
- Nephrology
- Transplant Surgery
- Pathology
Background:
- Kidney vascular pathology's effect on transplant outcomes is not fully understood.
- Donor-specific factors further complicate this relationship.
Purpose of the Study:
- To investigate the impact of baseline kidney vascular pathology in deceased donors on transplant outcomes.
- To assess graft survival and kidney function based on vascular disease severity.
Main Methods:
- Retrospective analysis of 837 deceased donor kidney transplants.
- Categorization into minimal (Group 0) vs. significant (Group 1) vascular disease based on histology.
- Propensity score matching to control for confounding variables.
Main Results:
- Significant vascular disease was linked to worse 5-year graft survival (64.6% vs. 80.0%) and death-censored graft survival (85.6% vs. 91.5%).
- Adverse effects were most pronounced in hypertensive and diabetic donors.
- Lower glomerular filtration rates were observed in kidneys with significant vascular disease.
Conclusions:
- Baseline vascular disease in deceased donor kidneys significantly impacts transplant outcomes, irrespective of clinical risk factors.
- Vascular histological assessment should be integrated into donor evaluation for improved risk stratification.
- Optimizing post-transplant management can be enhanced by considering donor vascular health.
Background:
The impact of kidney vascular pathology on transplant outcomes remains poorly understood, particularly under specific donor conditions.
Methods:
This retrospective single-center study analyzed 837 deceased donor kidney transplants. Based on baseline vascular histology, the kidneys were categorized into two groups: minimal vascular disease (Group 0, n = 637) and significant vascular disease (Group 1, n = 200). Five-year graft survival and 6- and 12-month kidney function were evaluated, along with subgroup analyses of various donor characteristics. Propensity score matching was used to adjust for confounding factors.
Results:
Recipients of kidneys with significant vascular disease showed worse 5-year overall graft survival (64.6% vs. 80.0%, p = 0.0002) and death-censored graft survival (85.6% vs. 91.5%, p = 0.0126). These differences persisted after propensity score matching. The impact was most pronounced in hypertensive donors (53.4% vs. 84.9%) and diabetic donors (52.3% vs. 69.0%). Circulatory death donors showed immediate adverse effects, while brain death donors demonstrated delayed deterioration. Kidneys with significant vascular disease exhibited lower glomerular filtration rates at follow-up.
Conclusion:
Baseline vascular disease in deceased donor kidneys has a significant impact on transplant outcomes, independent of clinical risk factors. These findings support the incorporation of vascular histological assessment into donor evaluation to enhance risk stratification and optimize post-transplant management.
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