Hemodialysis Powerpoint

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    Hemodialysis

    by: Liana Lee Sencin

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    What is hemodialysis?

    Hemodialysis is a treatment used for

    patients to rid blood of metabolicwastes, urine, harmful toxins and

    other extra fluids.

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    Our Kidneys

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    Excretory Functions

    Maintains plasma osmolarity by

    eliminating water

    Maintains plasma pH near 7.4 byeliminating excess hydrogen

    Excretes nitrogenous end products of

    protein metabolism

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    Endocrine Functions

    Renin- affects sodium, fluid volume, and

    blood pressure

    Erythropoietin- which regulates redblood cell productions in bone marrow

    Prostaglandin- regulates blood flow in

    the kidneys

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    Chronic Renal Failure

    A person with thisdisorder will not

    benefit from thenormal functionsof kidneys. Thereis complete renal

    failure.

    Diabetes

    Hypertension

    Glomerolunephritis

    Cystic Disorders

    Drug toxicity

    Damage to supportingstructure of kidneys

    Causes:

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    Hemodialysis

    Hollow -fiberDialyzer

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    Hollow-fiber Dialyzer

    Dialysate inflow tube

    Dialysate outflow tube

    Blood inflow tube

    Blood outflow tube

    10,000 hollow fibers

    (large surface area)

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    Process of Dialysis

    Blood circulates outside the

    body and passed through

    the dialyzer

    Comes into contact with acounter flow of dialysate

    solution

    Toxins are removed from

    the blood through diffusion

    Excess water is removedfrom the blood with a

    certain amount of filtration

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    Process of Dialysis

    Blood is injected with

    heparin, an anticoagulant.

    Blood is then returnedback to the body through

    the artery.

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    Diffusion in Dialysis

    Constant movement of dialysate

    solution and maintains a high

    concentration gradientElectrolytes are added to dialysate so

    that there will be a healthy amount in

    blood

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    Ultrafiltration

    Dialysis machine causes hydraulic pressure

    There is higher pressure in blood

    compartment than in the dialysatecompartment

    This forces water and any other molecules

    small enough to pass through themembrane to evacuate the blood.

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    Works Cited

    Sakai, Kiyotaka,2000. Frontiers Medical

    Biological Engineering. Dialysis

    membranes for blood purification.Vol.10, No. 2: 117-129.

    www.yahoo.com

    http://kidney.niddk.nih.gov/kudiseases/pubs/hemodialysis/index.htm

    http://www.yahoo.com/http://kidney.niddk.nih.gov/kudiseases/pubs/hemodialysis/index.htmhttp://kidney.niddk.nih.gov/kudiseases/pubs/hemodialysis/index.htmhttp://kidney.niddk.nih.gov/kudiseases/pubs/hemodialysis/index.htmhttp://kidney.niddk.nih.gov/kudiseases/pubs/hemodialysis/index.htmhttp://www.yahoo.com/