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Hemodialysis

Hemodialysis. 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.

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Hemodialysis

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  1. Hemodialysis

  2. 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 therapies (the other two being renal transplant; peritoneal dialysis).

  3. Hemodialysis can be an outpatient or inpatient therapy • Dialysis treatments in a clinic are initiated and managed by specialized staff made up of nurses and technicians; • The dialysis solution that is used is a sterilized solution of mineral ions. Urea and other waste products, and also, potassium and phosphate, diffuse into the dialysis solution.

  4. A prescription for dialysis by a nephrologist (a medical kidney specialist) will specify various parameters for a dialysis treatment. These include frequency (how many treatments per week), length of each treatment, and the blood and dialysis solution flow rates, as well as the size of the dialyzer

  5. Side-effects and complications • Hemodialysis often involves fluid removal (through ultrafiltration), because most patients with renal failure pass little or no urine. • Side effects caused by removing too much fluid and/or removing fluid too rapidly include low blood pressure, fatigue, chest pains, leg-cramps, nausea and headaches.

  6. Since hemodialysis requires access to the circulatory system, patients undergoing hemodialysis may expose their circulatory system to microbes, which can lead to sepsis, an infection affecting the heart valves (endocarditis) or an infection affecting the bones (osteomyelitis). The risk of infection varies depending on the type of access used

  7. Heparin is the most commonly used anticoagulant in hemodialysis • Longterm complications of hemodialysis include Amyloidosis, Neuropathy and various forms of Heart disease.

  8. AV fistula • AV (arteriovenous) fistulas are recognized as the preferred access method. • To create a fistula, a vascular surgeon joins an artery and a vein together through anastomosis. • . Fistulas are usually created in the nondominant arm and may be situated on the hand, the forearmm or the elbow.

  9. AV graft • AV (arteriovenous) grafts are much like fistulas in most respects, except that an artificial vessel is used to join the artery and vein. • The graft usually is made of a synthetic material, often PTFE, but sometimes chemically treated, sterilized veins from animals are used.

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