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Objectives: Percutaneous kidney biopsy is a useful diagnostic procedure. Hemorrhagic complications may occur following the procedure. Methods: We retrospectively analyzed the records of 1198 patients who had percutaneous renal biopsy between March 2013 and March 2018. The cohort included both native kidney and transplant biopsies. We have included only the first biopsy for each patient; repeat biopsies for 132 patients were excluded from the analysis. Results: 1198 patients ( 332 transplant recipients and 886 native kidney patients) were included in the study. Major complications occurred in 18(1.5%) of patients (1.4% in native kidney biopsies Vs 1.6% in kidney transplant recipients. Adequate renal tissue (core of > 6 glomeruli ) was obtained in 91 % of patients. Our analysis revealed that the incidence of major complications, in the native kidney biopsy are increased with age>65 years (odds ratio2.4, 95 % CI (1.5-5.6), eGFR<30 ml/min/m2 (odds ratio 9.7, 95 % CI (3.4-18.2) ) and anemia(9-11 mg/dl)(odds ratio3.2 (1.7-5.2), 95 % CI(1.7-5.2). In transplant recipients kidney biopsy the incidence of complications was increased with age>65 years (odds ratio 2.8(1.7-7.3), 95 % CI (1.7-7.3), eGFR<30 ml/min/m2 (odds ratio 11.3, 95 % CI (3.5-16.8 ) and anemia (9-11mg/dl )(odds ratio 2.4, 95 %(1.7-4.7). Conclusion: The incidence of major complications following kidney biopsy was 1,5%(for a cohort of native kidney biopsy and kidney transplant biopsies . Age> 65 years, lower eGFR < <30 ml/min/m2 and anemia were independent risk predictors for the occurrence of major complications in both native and transplant kidney biopsy.
Keywords: Biopsy; biopsy, needle; renal, complications, safety, adequacy.
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