A quick reference guide to haemofiltration and renal failure March ...

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CVVHDF Continuous Veno-Venous Haemodiafiltration In this type of CRRT, a slow countercurrent dialysate flow is added to the haemofilter. Solute removal is both diffusive and convective, and is thought to be the most effective method of removal of wastes in CRRT. (Bellomo, Ronco and Mehta, 1996:S4) Fluid replacement is routinely added, as clinically indicated, to maintain desired fluid balance. This is due to the ultrafiltration rate being greater than the desired patient fluid loss. (Bellomo, Ronco and Mehta, 1996:S4) V + pump V Dialysate out Dialysate In + UF V – vein, R – replacement fluid, UF – ultrafiltrate R 12
Molecules are measured in daltons (Da), which represents their ‘size’. The size of the molecule will determine whether that molecule will be moved through the haemofilter membrane. Diffusion or convection are the mechanisms for transport of the molecules. Molecule Molecular Weight Sodium 33 Calcium 40 Urea 60 Creatinine 113 Uric acid 168 Dextrose 180 Vitamin B12 1352 Myoglobin 17 000 Albumin 68 000 Globulin 150 000 Red blood cells, white blood cells, bacteria and virus’ are larger. 13
Page 1 and 2: A quick reference guide to haemofil
Page 3 and 4: Acute renal failure (ARF) is a comm
Page 5 and 6: Glomerular Filtration; blood flows
Page 7 and 8: CRRT, or continuous renal replaceme
Page 9 and 10: CVVHF Continuous Veno-Venous Haemof
Page 11: CVVHD Continuous Veno-Venous Haemod
Page 15 and 16: FILTRATION Filtration is defined as
Page 17 and 18: CONVECTION Convection is defined as
Page 19 and 20: MANIPULATION OF THESE H PRINCIPLES
Page 21 and 22: • A double lumen catheter, also k
Page 23 and 24: AIM - to prevent the filter and the
Page 25 and 26: MOST COMMONLY USED ANTICOAGULANT TH
Page 27 and 28: SALINE FLUSHES • In patients that
Page 29 and 30: There is restriction of movement of
Page 31 and 32: Bicarbonate is unstable in solution
Page 33 and 34: BASELINE OBSERVATIONS to establish
Page 35 and 36: NORMAL BLOOD VALUES Na 135 - 145 mm
Page 37 and 38: While machines involved in CRRT dif
Page 39 and 40: The Aquariius Manufactured by Edwar
Page 41 and 42: TRANSMEMBRANE PRESSURE ALARM TMP ha
Page 43 and 44: Line kinked /clamped Remove kink /
Page 45 and 46: If UF is coloured, the membrane is
Page 47: we know? American Journal of Kidney

A quick reference guide to haemofiltration and renal failure March ...

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