Lung Ultrasound and Bioelectrical Impedance Analysis for Fluid Status Assessing Patients Undergoing Maintenance...

Area of Science:

• Nephrology
• Cardiology
• Medical Imaging

Background:

• Volume overload is a critical complication for hemodialysis patients, necessitating accurate fluid status assessment.
• Traditional clinical methods for judging fluid status are subjective, highlighting the need for objective techniques.
• Lung ultrasonography (LUS) using B-lines to assess lung water is emerging as a promising tool for fluid management.

Purpose of the Study:

• To evaluate the role of B-line quantification via LUS in predicting mortality and cardiovascular events in hemodialysis patients.
• To determine the correlation between LUS findings, fluid status, and cardiac function.
• To establish an optimal B-line cutoff for identifying fluid overload.

Main Methods:

• A cohort of 98 hemodialysis patients underwent LUS and bioelectrical impedance analysis before and after dialysis.
• Clinical data and cardiovascular events were collected during a one-year follow-up period.
• Patients were categorized into mild, moderate, and severe hypervolemia groups based on LUS B-line counts.

Main Results:

• Severe hypervolemia ( >30 B-lines) was associated with significantly lower long-term survival rates compared to mild (<16 B-lines) and moderate (16-30 B-lines) groups.
• LUS B-lines correlated significantly with cardiac parameters like left ventricular ejection fraction (P < 0.001).
• An optimal B-line cutoff of 11.5 predicted fluid overload with 76.5% sensitivity and specificity (AUC=0.840, P < 0.001).

Conclusions:

• Lung ultrasonography is a cost-effective, noninvasive method for monitoring fluid status in hemodialysis patients.
• LUS B-line quantification can assist in personalized fluid management and partially predict short-to-mid-term survival.
• The study supports LUS as a valuable tool for managing volume overload in hemodialysis.