Renal

/ Abdomen & Pelvis / By

CKD

  • CKD Stages
  • eGFR CABG
eGFR is estimated GFR calculated by the abbreviated MDRD equation : 186 x (Creatinine/88.4)–1.154 x (Age)–0.203 x (0.742 if female) x (1.210 if black). If you have an eGFR value calculated by a local laboratory, use that.

Dialysis

  • Hemodialysis: 

AV Fistula

  •  Size

A radial artery luminal diameter of less than 1.6mm is associated with early fistula failure and a minimum diameter of 2mm is now usually advised.

Minimum venous diameters (with a tourniquet) of 2–2.5mm have been advised for AVFs and 3.5– 4.0mm for synthetic grafts.

  • Position

The snuffbox AVF is the most distal access possible and gives the longest length of vein for needling. It is possible in about 50% of patients and, in the event of failure, a wrist AVF can still be performed in half of the cases

  • Criteria for AVF

The rule of 6’s (flow volume >600 mL/min; vein diameter >6 mm; vein depth <6 mm) is a widely used informal guide to determine when an arteriovenous fistula (AVF) will support dialysis.

What is the minimum vein size for AVF?

Some experts suggest a vein diameter of 2.0 mm as adequate for AVF creation. The preferred minimal vein diameter after dilation for radiocephalic wrist arteriovenous fistula (RCAVF) creation is 2.5 mm.