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During the congress, E-Posters will be accessible to all participants on the congress website 24/7, as well as in the E-poster stations in the congress center.
Preparing your E-Poster
Please review the E-Poster format requirements carefully when preparing your E-Poster. Should your E-Poster not meet the mentioned requirements, it may not be displayed as described above.
E-Poster Submission Deadline
Please prepare and upload your E-Poster no later than March 14, 2026 11.59PM CET. After this date, you will no longer be able to prepare and upload your E-poster and it will not be displayed and accessible on the congress website.
Please follow the instructions below to input your abstract title.
Abstract titles should be brief and reflect the content of the abstract.
Percutaneous renal biopsy (PRB) is essential for diagnosing renal diseases but carries a risk of bleeding. A national survey in Japan reported that 60% of institutions required 16–24 hours of bed rest, 28% required 8–16 hours, and 11% required 4–8 hours, with overnight supine bed rest generally recommended. In contrast, some international centers have adopted protocols allowing ambulation after 4 hours, although evidence regarding their safety remains limited. In this study, we assessed bleeding risk both before and after PRB and examined the safety of a 4-hour supine bed rest protocol in patients judged to be at low risk for bleeding complications.
We conducted a prospective single-center descriptive observational study to evaluate the safety of an abbreviated bed rest protocol after PRB. Eligible patients were adults (≥18 years) with eGFR >30 mL/min/1.73 m², hemoglobin >10 g/dL, blood pressure <160/100 mmHg, platelet count ≥100,000/µL, no coagulopathy, and independent activities of daily living. Eligibility was confirmed by pre-biopsy laboratory and clinical parameters, and by post-biopsy safety checks during the initial observation period. To ensure patient safety, patients who developed post-biopsy complications such as perirenal hematoma ≥40 mL or hematoma expansion on ultrasound at 1 hour post-biopsy, uncontrolled hypertension, gross hematuria, severe flank pain, or unstable vital signs were excluded prior to initiation of the 4-hour ambulation protocol. Patients meeting all criteria were allowed to sit up and ambulate after 4 hours of strict supine bed rest. Outcomes of interest were bleeding complications requiring transfusion or endovascular intervention, symptomatic bleeding, gross hematuria, and prolonged hospitalization.
A total of 93 patients consented, of whom 28 were excluded due to pre-biopsy bleeding risk factors and 2 were excluded because of hematoma expansion on ultrasound at 1 hour post-biopsy. The remaining 63 patients were analyzed. The mean age was 54.3 years (35 men, 28 women). Mean eGFR was 65.4 mL/min/1.73 m². The mean perirenal hematoma volume was 4.4 mL immediately after biopsy and 2.8 mL at 1 hour post-biopsy. Arteriovenous fistulas were detected in 3 cases, and the mean number of needle passes was 3.9. No bleeding complications requiring transfusion or endovascular intervention were observed; no cases of gross hematuria, symptomatic bleeding, or prolonged hospitalization were recorded.
In this descriptive study, no major bleeding complications were identified among carefully selected low bleeding risk patients. Our findings suggest that a 4-hour bed rest protocol can be safely applied to carefully selected low bleeding risk patients. However, larger studies with greater sample sizes are required to confirm its generalizability.
