Blood Urea Nitrogen Stability: A Feasibility Study for Home Hemodialysis Adequacy Testing Through Mail

Area of Science:

• Nephrology
• Clinical Chemistry
• Biomedical Engineering

Background:

• Urea kinetic modeling is crucial for assessing hemodialysis adequacy.
• Sample collection poses a significant challenge for home hemodialysis (HHD) patients.
• Current methods often require in-clinic sampling, hindering HHD patient convenience.

Purpose of the Study:

• To determine the stability of blood urea nitrogen (BUN) in samples mailed from home.
• To evaluate the feasibility of using mailed samples for dialysis adequacy monitoring in HHD.
• To address the logistical challenges of sample collection for HHD patients.

Main Methods:

• Blood urea nitrogen (BUN) levels were measured in pre- and postdialysis samples.
• Samples were collected from 20 HHD patients.
• The stability of BUN was assessed over 8 days of laboratory storage.

Main Results:

• Blood urea nitrogen (BUN) values exhibited no significant variation in either pre- or postdialysis samples during 8 days of storage.
• Individual BUN levels varied across the patient cohort, but stability within samples was confirmed.
• This indicates reliable BUN measurements are achievable even after sample transit.

Conclusions:

• Blood urea nitrogen (BUN) levels are stable enough for samples to be collected at home and mailed to a clinical laboratory.
• This finding supports the use of mailed samples for monitoring hemodialysis adequacy in HHD patients.
• The study validates a more convenient method for HHD adequacy assessment.