continuous arteriovenous hemofiltration

Also found in: Acronyms.


the removal of waste products from the blood by using large amounts of ultrafiltration with reinfusion of sterile replacement fluid. See also hemoperfusion.
continuous arteriovenous hemofiltration a form of continuous renal replacement therapy consisting of hemofiltration with arteriovenous access using small-volume, low-resistance filters powered by the patient's arterial pressure, without need for a mechanical pump; used as an alternative to conventional hemodialysis in patients with acute renal failure.
continuous venovenous hemofiltration a process similar to continuous arteriovenous hemofiltration but using venovenous access and a mechanical pump.

con·tin·u·ous ar·ter·i·o·ve·nous he·mo·fil·tra·tion

(CAVH) (kŏn-tin'yū-ŭs ahr-tēr'ē-ō-vē'nŭs hē'mō-fil-trā'shŭn)
Removal of fluid and uremic solutes from the circulation in acute and chronic renal failure by continuous pressure- or vacuum-assisted, convection-based filtration across a membrane.


An ultrafiltration technique to remove excess metabolic products from the blood. The technical aspects are similar to those of hemodialysis in that the blood flows from the patient to the hemofilter and is then returned.


Depending on the type of filter membrane used, essential materials may be removed from the blood. It is important to replace the excess crystalloids removed.

continuous arteriovenous hemofiltration

Abbreviation: CAVH
Continuous renal replacement therapy.

continuous venovenous hemofiltration

Continuous renal replacement therapy.
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