F00574 017 f023

Blood

•    Typical smali solute clearance 160 mt/min    • Typical smali solute clearance (2 litres/hr exchanges)

•    Used in both acute and chronic renal failure    33ml/min

•    ? Less circulatory instability than haemodialysis

•    Used mostly in acute renal failure

• Access to the circulation for haemodialysis or filtration is required. Arleriovenous fistulae. temporary or semi-permanent tunnelled central venous lines or arterio-venous shunts {e.g. Scribner shunt) may be used. The extracorporeal Circuit reguires anticoagulation, typically with heparin

[cl Peritoneal dialysis

•    Access to the peritoneal cavity via Tenckhoff catheter

•    Continuous ambulatory peritoneal dialysis (CAPD): typically 4 exchanges of 2 litres of fluid a day 4-6 hours apart

•    Automated peritoneal dialysis (APD): uses a machinę

to perform exchanges overnight (8-10 hours). Used mostly in chronic renal failure

•    Successful transplantation extends the life expectancy of patients with end-stage CRF

•    Requires long-term use of immunosuppressives with attendant risks

[ę] Conservative management

© Elsevier. Boon et al.: Davidson's Principles and Practice of Medicine 20e - www.studentconsult.com

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