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What Is the Safe Observation Period Following Image-Guided Percutaneous Renal Biopsies?

Fergus Taylor¹, Kunal Sehgal¹, Matthew Van Wees¹

¹Monash Imaging, Monash Health, Melbourne, Victoria, Australia.

Journal of Medical Imaging and Radiation Oncology

|April 28, 2025

Summary

Most complications from percutaneous renal biopsies occur within two hours. This study suggests that observation periods after image-guided renal biopsies could potentially be shortened, improving patient management.

Keywords:

biopsy complication‐free probability observation periods renal

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Area of Science:

Nephrology
Radiology
Medical Procedures

Background:

Percutaneous renal biopsy is a common diagnostic procedure.
Current post-biopsy observation protocols typically recommend a 4-hour monitoring period.
Assessing complication timing is crucial for optimizing patient care and resource allocation.

Purpose of the Study:

To analyze the timing, type, and severity of complications after percutaneous, image-guided renal biopsies.
To evaluate the feasibility of reducing the standard 4-hour post-biopsy observation period.

Main Methods:

Retrospective analysis of 332 percutaneous renal biopsies performed between 2017 and 2022.
Data extracted from RIS-PACS and electronic medical records.
Complication rates and timing analyzed against patient and procedural variables.

Main Results:

13% (44/332) of biopsies resulted in complications within 4 hours.
64% of complications occurred within the first hour, and 86% within 2 hours.
Complications after 2 hours were infrequent and often manageable with pain management.

Conclusions:

The majority of complications following renal biopsies occur early, within the first 2 hours.
Reducing the observation period post-image-guided renal biopsy may be safe.
Standardized post-operative pain management can address later-occurring complications.