Dialysis Flashcards
What toxins are removed during dialysis?
urea
potassium
sodium
What is the point of dialysis?
remove toxins from the blood that build up in end stage renal disease - allows the infusion of bicarbonate
What is absorbed into the blood during dialysis?
bicarbonate
What absorb the plasma proteins that stick to the membrane surface?
high flux membranes
What is haemodialysis?
blood is passed over a semi permeable membrane against dialysis fluid flowing in the opposite direction
What is used to clear excess fluid in haemodialysis?
convective solute drag - hydrostatic gradient
What is the preferred access for haemodialysis?
arteriovenous fistula
What is the process of ultrafiltration?
H2O goes from the blood to the dialysis fluid
What is haemodiafiltration?
the greater the convective force, the greater the generated volume of pressure driven ultrafiltrate
What helps haemodiafiltration?
larger volumes of ultra filtrate that create a positive pressure to clear water
What is smoother and less symptomatic - HD or HF?
haemodifiltration
What does haemodiafiltration rely on?
water flux membrane pore size hydrostatic pressure difference viscosity of fluid size, shape and electrical charge of each molecule
What is the difference between HD and HF?
in HF a replacement volume must be given directly back to the patients circulation
What must the patient change, lifestyle wise, while being on dialysis?
salt restriction
phosphate restriction
potassium restriction
What are the pros of a tunneled venous catheter?
easy to insert into the jugular vein
