Circulation Aids
- Created by: Jasmin
- Created on: 06-05-13 20:47
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- Circulation Aids
- Artificial blood
- Blood substitute
- Plasma/saline
- Used to replace lost blood. Plasma carries dissolved oxygen
- Saline does not carry oxygen or food
- Safe is no air bubbles get in
- Can keep people alive and give them time to produce new blood cells
- Perfluorocarbons (PFCs)
- Non - reactive chemicals that can carry dissolved gases around your body
- Do not contain cells, can carry O2 into most swollen tissues of damaged body
- Do not dissolve in water so getting htem into blood is difficult
- Do not carry as much O2 as real blood so large amounts needed
- Side effects
- Haemoglobin - based products
- Carries more O2 than normal blood, no red blood cells
- Does not always need to be kept in the fridge
- Still being developed
- Artificial hearts
- Temporary hearts until donor found
- Mechanical devices that are put into a person to pump blood if their own heart fails
- ADV - not rejected as made from metals and plastics
- DIS - surgery to fit can lead to bleeding/infection
- Don't work as well as healthy ones as could wear out or fail
- Blood does not flow as easily - cause blood clots - strokes
- Patient has to take drugs to thin blood
- Heart valves
- Can be replaced with mechanical valves
- Surgery - problems with blood clots
- Stents
- Coronary heart disease when arteries that supply blood to muscle of heart get blocked by fatty deposits
- Become narrow, blood flow restricted = heart attack
- Metal mesh placed in artery
- Keep arteries open, lower risk of heart disease
- Artery can narrow again over time - irritate artery and make scar tissue grow
- Patient has to take drugs to stop blood clotting
- Artificial blood
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