Hemodialysis
A medical procedure that uses a special machine (a dialysis machine) to filter waste products from the bloodstream and to restore normal constituents to the blood. This remarkable feat shuffling multiple substances about is accomplished by virtue of the differences in the rates of their diffusion through a semipermeable membrane (a dialysis membrane). Although hemodialysis may be done for acute kidney failure, it is much more often employed for chronic renal disease. Hemodialysis is frequently done to treat end-stage kidney disease. Under such circumstances, kidney dialysis is typically administered using a fixed schedule of three times per week. There are other types of dialysis as, for example, peritoneal dialysis. Hemodialysis is commonly referred to as dialysis.
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Dialysis of soluble substances and water from the blood by diffusion through a semipermeable membrane; separation of cellular elements and colloids from soluble substances is achieved by pore size in the membrane and rates of diffusion.

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he·mo·di·al·y·sis or chiefly Brit hae·mo·di·al·y·sis .hē-mō-dī-'al-ə-səs n, pl -y·ses -.sēz dialysis (2a)

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he·mo·di·al·y·sis (he″mo-di-alґə-sis) the removal of certain elements from the blood by virtue of the difference in the rates of their diffusion through a semipermeable membrane (see hemodialyzer). Two distinct physical processes are involved, diffusion and ultrafiltration (qq.v.). See also clearance. Called also dialysis, kidney dialysis, and renal dialysis.

Medical dictionary. 2011.

Look at other dictionaries:

  • hemodialysis — [hē΄mōdī al′ə sis, hem΄ōdī al′ə sis] n. pl. hemodialyses [hē΄mō dī al′əsēz΄, hem΄ō dī al′əsēz΄] DIALYSIS (sense 2) …   English World dictionary

  • Hemodialysis — In medicine, hemodialysis (also haemodialysis) is a method for removing waste products such as potassium and urea, as well as free water from the blood when the kidneys are in renal failure. Hemodialysis is one of three renal replacement… …   Wikipedia

  • hemodialysis — hemodializei statusas Aprobuotas sritis vaistų vartojimo būdai apibrėžtis Nurodymas vaistinį preparatą naudoti atliekant hemodializės procedūrą atitikmenys: angl. hemodialysis vok. Hämodialyse pranc. hémodialyse šaltinis 1. Standard Terms… …   Lithuanian dictionary (lietuvių žodynas)

  • hemodialysis — noun Date: 1947 dialysis 2 …   New Collegiate Dictionary

  • hemodialysis — /hee moh duy al euh sis, hem oh /, n. Biochem. dialysis of the blood, esp. with an artificial kidney, for the removal of waste products. [1945 50; HEMO + DIALYSIS] * * * …   Universalium

  • hemodialysis — n. dialysis of the blood, removal of waste products from the body by a machine …   English contemporary dictionary

  • hemodialysis — he·mo·dialysis …   English syllables

  • hemodialysis — he•mo•di•al•y•sis [[t]ˌhi moʊ daɪˈæl ə sɪs[/t]] n. biochem. dialysis of the blood, esp. with an artificial kidney, for the removal of waste products • Etymology: 1945–50 …   From formal English to slang

  • hemodialysis — noun dialysis of the blood to remove toxic substances or metabolic wastes from the bloodstream; used in the case of kidney failure • Syn: ↑haemodialysis • Hypernyms: ↑dialysis …   Useful english dictionary

  • Hemodialysis product — (HDP) is a number used to quantify hemodialysis and peritoneal dialysis treatment adequacy.It was proposed by Scribner and Oreopoulousref|Scribner because of their perceived inadequacy of the Kt/V measure of dialysis adequacy. It has not been… …   Wikipedia

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