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What is the aim of the countercurrent flow in the hemodialysis dialyzer?
In creating hemodialysis dialyzers, either a countercurrent or cocurrent flow can be used between the unfiltered blood and the dialysate used to clean the blood. Using a differential material balance (fluid mechanics) on the fluid and solute entering and leaving the device, the molar flow rate of the blood into the dialysate can be calculated. Without showing the math behind it, countercurrent flow if more efficient at cleaning the blood than cocurrent flow in a hemodialysis dialyzer. The reason for this is because the countercurrent flow allows the outlet concentration of the dialysate to exceed the outlet concentration of the blood, and approach the inlet concentration of the blood. With cocurrent flow, the exit concentration of the dialysate is slightly less than the outlet concentration of the blood, but much less than the inlet concentration. Physically speaking, countercurrent flow optimizes the concentration gradient throughout the length that the dialysate and blood are flowing next to one another. This causes more urea to diffuse through the membrane within this length, allowing the blood to be cleaned faster than cocurrent flow.
What is the following combination of substances is in dialysate?
combination of substances is in dialysate
Is hemodialysis the same as dialysis?
Hemodialysis is one of the types of dialysis. There are two primary types of dialysis, hemodialysis and peritoneal dialysis, and a third investigational type, intestinal dialysis. In hemodialysis, the patient's blood is pumped through the blood compartment of a dialyzer, exposing it to a semipermeable membrane. The cleansed blood is then returned via the circuit back to the body. Ultrafiltration occurs by increasing the hydrostatic pressure across the dialyzer membrane. This usually is done by applying a negative pressure to the dialysate compartment of the dialyzer. This pressure gradient causes water and dissolved solutes to move from blood to dialysate, and allows the removal of several litres of excess fluid during a typical 3 to 5 hour treatment. In short, Hemodialysis (he-mo-di-AL-i-sis) is a procedure to remove excess water and harmful chemicals and wastes from your blood. Hemodialysis helps clean up the blood when the kidneys cannot function properly, such as in chronic kidney failure. For more details, I would suggest you contact the medical expers from some renowned medical center like Ocean Medical Center.
Are all the cells in your bodies continually replaced as you age?
Yes except for brain cells that after age 35 are not replaced when they die
What is dialysate solution made of?
ure momma
Resources that can be continually replaced are called?
non- renewable (sorry I'm a horrible speller)
When comparing hemodialysis and peritoneal dialysis it can be said that?
When comparing hemodialysis and peritoneal dialysis, it can be said that
In dialysis what is present in the dialysate?
The dialysate used in dialysis contains electrolytes like sodium, potassium, calcium, and bicarbonate dissolved in sterile water. These electrolytes help maintain the body's balance of fluids and ions by removing waste products and excess fluids during the dialysis process.
What part of the dialysate is considered to be the buffer?
Bicarbonate (HCO3)
What replaces kidney function by filtering waste products directly from the patients blood?
Hemodialysis
What are the difference between peritoneal dialysis and hemodialysis?
hemodialysis takes longer than peritoneal dialysis
Which component of dialysate might be changed when a patient is on Digoxin?
Magesium
