Optimizing Fluid Assessment in Nephrology: Utility of Point-of-Care Ultrasonography Beyond Clinical Signs

Introduction: Effective volume assessment integrates multiple factors, however, traditional evaluation, often relying on clinical signs like blood pressure, jugular venous distention, rales, and peripheral edema, frequently shows poor predictive value. For Nephrology fellows, Point-of-Care Ultrasound (POCUS) is a reliable tool that enhances their ability and confidence in determining volume status. This valuable technique facilitates the more rapid development of appropriate therapeutic plans and improves patient management, particularly in acute nephrology settings and critically ill patients Case Description: A 52M with end-stage kidney disease (ESKD) on hemodialysis (HD), HTN, and Obesity is admitted at 11 PM with generalized weakness after missing one HD session. Initial evaluation noted trace peripheral edema, unassessable jugular veins and diminished breath sounds due to body habitus, blood pressure 141/92 mmHg, SpO2 95% on room air, stable blood chemistry and a supine chest x-ray with moderate pulmonary congestion. Despite this initial picture suggesting stability for routine HD the following morning, POCUS revealed critical findings: a dilated inferior vena cava (IVC) with minimal respiratory variation, dilated bilateral atria, reduced ejection fraction(EF), trace pericardial effusion, minimally pulsatile abdominal aorta indicative of low forward flow, bilateral pleural effusions, and small-volume ascites. These findings, demonstrating severe, clinically under-appreciated volume overload and impending cardiogenic collapse prompted emergent HD. The patient underwent serial HD treatments over four days, with a total fluid removal of 12.2L. This resulted in clinical improvement, a 10% increament in EF and resolution of pleural effusions. He was subsequently discharged with optimal dry weight and stable cardiac function. Discussion: Nephrology-led POCUS initiatives are pivotal, as they place this diagnostic tool directly with clinicians possessing an intrinsic understanding of patient pathophysiology and expertise in fluid homeostasis. This direct integration empowers Nephrology fellows to promptly formulate and dynamically adjust therapeutic strategies based on objective, POCUS-derived volume parameters. The ability to perform serial assessments accommodates the patient's evolving volume status, thereby optimizing individualized fluid management.