Presentation on theme: "Dialysis Machine - Critical Thinking Inside a Tan Jiefeng (21)"— Presentation transcript:
1Dialysis Machine - Critical Thinking Inside a Tan Jiefeng (21) Done by:Tan Jiefeng (21)Nicholas Tay (22)Wang Shiyao (23)Class 1I1
2What is Kidney Failure?Not able to remove waste and extra water from the blood or keep body chemicals in balance.Needs the help of a Dialysis machine.
3What is Dialysis?Dialysis is the cleansing of blood through a special machine.Dialysis machines help to remove the waste products from their blood.
4How does a Dialysis Machine work? Path which blood takes:
5What is inside a Dialyzer? Inside a Dialyzer, there is a semi-permeable membrane.On one side there is blood.On the other side there is a special solution called dialysate.
6What is inside a Dialyzer? Dialysate is a solution that pulls waste from blood.
7movement of substances from an area of HIGH CONCENTRATION What is diffusion?Diffusion is themovement of substancesfrom an area ofHIGH CONCENTRATIONto an area ofLOWER CONCENTRATION.
8Semi-permeabilitySmaller substances are able to pass through the semi-permeable membrane- Because they are small enough.Bigger substances cannot pass through the semi-permeable membrane- Because they are too big.
9Question 4aHow do you think the waste substances in the blood such as urea is removed from the blood?
10Question 4a They are removed from the blood in the dialyzer. In the dialyzer, the blood with waste products will flow past one side of a semi-permeable membrane.On the other side of this membrane, there is a special substance called dialysate, which pulls waste from blood. The waste such as urea will pass through the membrane.
11Question 4bWill the red and white blood cells and platelets which make up the blood be removed? Why?
12Question 4bThe red and white blood cells and platelets will not be removed.- This is because they are too big to pass through the semi-permeable membrane in the dialyzer and thus will return to the blood compartment.
13Question 4cDiffusible substances needed by the body such as sugars, amino acids and certain amounts of salts can go through the membrane. What can be done to make sure that these substances are not removed by dialysis?
14Question 4cTo make sure that these substances are not removed, the concentration of these substances on the other side of the membrane has to be the same.This is because diffusion is substances moving from a higher concentration to a lower concentration,If the concentration on both sides of the membrane is the same, then the substances will not move.
15Question 4dWater from the blood can also diffuse through the membrane. Why is it not removed by dialysis?
16Question 4dSimilarly, if the concentration of water on the other side of the membrane is the same as that of blood, then there will be no diffusion, and no movement of water.