How is the calculation of recirculation performed?

The calculation of recirculation in hemodialysis is crucial for assessing the adequacy of the dialysis treatment. The correct method involves comparing the concentrations of a substance in a peripheral blood sample to those in the arterial and venous samples collected during the procedure.

To determine recirculation, the formula subtracts the arterial value from the peripheral value and then multiplies the result by 100. This gives an indication of how much of the blood flow is recirculated within the machine rather than being effectively dialyzed. The purpose of this calculation is to evaluate whether there is a return of blood from the venous line to the arterial line, which can compromise the efficiency of the dialysis treatment.

Using this specific formula allows healthcare providers to obtain a percentage that accurately reflects the presence of recirculation, informing them on how to adjust the treatment if necessary.