Factors affecting bloodloss

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Surgery
- Blood loss
  - Controlling blood loss
    - Cautery
      - This was to seal blood vessels after an operation
        The problem was that it was extremly painful
      - This was done with a hot iron or oil
    - Ligetures
      - Ambroise Paré
        Developed metal clips to clamp blood vessels during an opertion
        
        Tried using silk thread to tie the blood vessels after surgery
        This was less painful but had to be tied properly to stop bleeding
    - Tourniquet
      - It was tied around part of the body (leg)
        This was to put pressure on the blood vessels to slow the loss of blood
  - Treating blood loss
    - Blood Tansfusions
      - 19th century
        James Blundell
        Used to stop mothers from dying in labour
        
        Development
        
        Problems
        Clotting
        
        Avaliability
        Blood was very difficult to store so the donor had to be present
        This is because the blood clotted making it impossible to store
- Infection
- Pain
  - Untitled
Blood starts clotting as soon as it leaves the body
- This would block the transfusion tubes
- Clotting

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