The Correlation Between Copeptin and Volume Status in Chronic Hemodialysis Patients

Area of Science:

• Nephrology
• Clinical Chemistry
• Biomarker Discovery

Background:

• End-stage kidney disease (ESKD) patients on hemodialysis often face challenges in accurately assessing fluid volume status.
• Current methods for volume assessment in ESKD are often invasive or indirect, highlighting the need for reliable noninvasive biomarkers.

Purpose of the Study:

• To investigate the relationship between plasma copeptin levels and volume status in patients undergoing maintenance hemodialysis.
• To evaluate copeptin as a potential noninvasive chemical biomarker for fluid management in ESKD.

Main Methods:

• A clinical trial involving 84 ESKD patients on maintenance hemodialysis.
• Measurement of plasma copeptin, hemoglobin, hematocrit, sodium, BUN, body weight, and blood pressure before and after hemodialysis sessions.
• Correlation analysis between copeptin levels and various clinical and laboratory parameters.

Main Results:

• A significant positive correlation was observed between copeptin levels and hemoglobin (Hb) and hematocrit (HCT).
• A negative association was found between copeptin and sodium (Na) and interdialytic weight gain (IDWG).
• Copeptin levels were higher in female patients, and changes in copeptin post-dialysis varied between sexes.

Conclusions:

• Copeptin demonstrates potential as a surrogate marker for diagnosing and monitoring volume status in hemodialysis patients.
• Further research may validate copeptin's role in optimizing fluid management strategies for ESKD.
• The findings support the exploration of copeptin in clinical settings for noninvasive volume assessment.