Labs after dialysis

Specialties Urology

Published

Hello everyone!

I have a question regarding lab work post dialysis. Is it okay to draw a CBC with diff after a patient has dialysis? If it is drawn about 45 min after dialysis?

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Specializes in Nephrology, Cardiology, ER, ICU.

Nope - no labs should be considered "accurate" after dialysis unless they are specifically drawn as post-dialysis labs.

CBC will be hemo-concentrated as pt is (hopefully) euvolemic.

Need to draw most labs pre-dialysis. 45 minutes post dialysis is not enough time to draw for accuracy.

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Specializes in Dialysis.

Our nephrologists always stated to wait at least 4 hours after a treatment, and that was only if it was truly necessary.

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Specializes in Dialysis.

Need to specify acute or chronic. In the hospital labs can be drawn 2 hours after the end of treatment.

An Australian study that claims accurate labs can be drawn one hour after treatment.

Preparation for surgery: Optimal time for blood collection following haemodialysis (PDF Download Available)

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Our nephrologists always stated to wait at least 4 hours after a treatment, and that was only if it was truly necessary.

One nephrologist I work with and have the utmost respect and trust has told me the same thing. A minimum of four hours should be given post-dialysis for drawing labs that can be considered accurate.

I try to pass this along to every primary RN I come in contact with.

(also I work in Acute Inpatient HD)

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