Hemodialysis 101: Apparatus
📌 From the patient, blood is pumped via the vascular access thru an ARTERIAL blood line (INFLOW) to the dialyzer
📌 Blood is returned to the patient from the dialyzer via a VENOUS blood line (OUTFLOW)
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Redsense sensor is used to detect blood leakage at the site of potential line separation
📌 For those who are at high risk for line separation
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👉🏼 redsensemedical.com/index.php/cont…
The VENOUS PRESSURE can be used to monitor the state of coagulation.
It is a function of:
📌 Blood viscosity
📌 Downstream access (needle or catheter) resistance
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Hollow fiber dialyzer
📌 Blood flows into a chamber (HEADER) at one end of the cylindrical shell; from there, blood enters thousands of capillaries tightly bound in a bundle
♦️Blood flows thru the fibers
♦️Dialysate flows around the outside
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Hollow fiber dialyzer
📌 COUNTERCURRENT flow: Blood and dialysate flow in opposite directions to maximize the concentration gradient between blood and dialysate in all parts of the dialyzer
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The presence of recirculation during HD decreases dialysis effectiveness, & generally occurs if the vascular access of the patient cannot deliver the required BFR
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👉🏼 basicmedicalkey.com/hemodialysis-a…
Blood Circuit
📌Inflow blood line
♦️Prepump segment
♦️Roller pump segment
♦️Postpump segment (ARTERIAL)
Dialysis Fluid Circuit
📌Outflow blood line (VENOUS)
♦️ Airtrap and pressure monitor
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👉🏼 basicmedicalkey.com/hemodialysis-a…
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