Questions About PD
If one is doing PD 3 nights a week only, theoretically, one should estimate the daily Kt/V and then multiply it by 7 to convert to weekly Kt/V. But different from regular CCPD where serum urea is quite constant, your patient will have high serum urea at the beginning of the PD night and then gradually falls towards the end of the cycles, the serum urea was therefore not constant. So the timing of take blood sample for serum urea would affect estimating the kt/V. You may take sample for serum urea at the beginning and end of the cycles and averaged them.
You should also bear in mind that current recommendations for Kt/V targets refers to continuous PD. There is no data for ‘intermittent’ PD. As predicted from the ‘peak urea hypothesis’, patients should need higher kt/V if the dialysis is intermittent instead of continuous.