The CVVHDF circuit has been asked about in Question 30 from the second paper of 2014 and Question 2d from the second paper of 2001, but the HD (haemodialysis) circuit has been left out of the question papers so far. Given that most modern machines perform CVVHDF, it is unlikely that this will ever come up. For the dialysis enthusiast, anatomy of the CRRT circuit is explored in greater detail in a chapter elsewhere.

This diagram was adopted from the Gambro Prismaflex brochure.

If one were to reproduce such a diagram in the college SAQs, one's diagram would be expected to " be appropriately labelled and depict access and return lines, filter, dialysate, effluent and replacement fluid and include sites of pressure measurement and pumps".