Overview of a Hemodialysis Machine, Summaries of Biology

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’ Access Device. » AVF Needles. * Central Venous Catheucs. i Corporeal Blood Circuit * Blood Pump Extra Corporeal Blood Circuit To deliver blood to the dialyzer at the prescribed flow rate & then return blood to the patient, Urea clearance rate depends upon blood flow rate. _* Dialysate prepared in the mixir temp. control cell. * When the temp is ok il passes through conductivity control ecll. : When both conductivity and temp. is in normal limits set in the machine, this dialysate is allowed to pass on. In adverse conditions it is by passed. and pushes it on the delicate hallow fiber dialyzer under : Pump speed can be or decreased. Once the di to use flow can be inereased “In olden days — In old machines negative pl flow rate was adjusted manually. Which “e not give consistent results in terms of UF 2. Current systems — Volumetric control ig accurate a balancing chamber. 3. Machine controls all parameters which are technician during the procedure. air separator » The conducti conductivity A+ B takes place. * Dialysate then flows across the balancing and conductivity ecll. - Conductivity cell monitors & indicates cor » Iftemp & conductivity are within normal limits,two ¢ valves( V24 & V24 b) will open and bypass val closes.