Certified Nephrology Nurse Exam Practice 2026 – Complete Study Guide

The primary purpose of a renal biopsy is to obtain kidney tissue for diagnosis. This procedure allows healthcare professionals to analyze the cellular structure of the kidney and identify any pathological changes, such as glomerular disease, interstitial nephritis, or other renal disorders. By examining the tissue under a microscope, clinicians can determine the specific type of kidney disease present, which is crucial for establishing an accurate diagnosis and informing a targeted treatment plan.

In contrast, assessing kidney blood flow involves evaluating vascular function and perfusion, while determining electrolyte balance focuses on the body’s mineral levels, which are important for overall homeostasis but not the primary reason for performing a biopsy. Monitoring hydration status pertains to evaluating fluid levels in the body, another important aspect of kidney health, but again not the primary goal of obtaining a renal tissue sample. Each of these aspects plays a role in nephrology but does not provide the histological information that a biopsy does, making it a critical tool in diagnosing renal conditions.