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HemoFiltration - Model HF - Home Dialysis
In ICUs, HemoFiltration (HF) is usually indicated in case of Fluid overload, Congestive heart failure, Acute renal failure, Crush syndrome, Lactic acidosis … . But HF may also be successfully used for patients with chronic renal failure. This technique allows removing all the substances that would normally be cleared by the kidneys through the generation of urine such as water, urea, creatinine or salts, as well as medium size substances which result from an injury to body cells and are often nephrotoxic.
- Fluid overload
- Congestive heart failure
- Acute renal failure
- Crush syndrome
- Lactic acidosis
This therapy is usually performed according to the same protocol as hemodialysis, at least 3 times per week and up to 7 times during 2-8 hours.
In hemofiltration, blood is passed through a hemofilter which allows water to be filtrated together with some other substances which are important in this case, such as salts, urea, creatinine or other medium size substances such as inflammatory mediators, the resulting fluid being named ultrafiltrate.
Ultrafiltrate is removed at a rate which allows the necessary clearance of the desired substances. As this rate is too important for other substances a substitution fluid is injected in the blood to compensate for undesired losses, such as that of water and salts.