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Hot & Cold Packs

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Kaitlyn Gidge

on 25 April 2014

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Transcript of Hot & Cold Packs

Thank You!
What is a hot/cold pack?
A small plastic which contains a hot or cold fluid which is used externally by placing on injured or swelling body part(s) to relieve the pain/swelling

Hot and cold packs can undergo exothermic or endothermic reactions. The hot packs will give off an exothermic reaction because it releases heat when dissolved in water. Cold packs give off an endothermic reaction because it will abosrb heat when dissolved in water.
Acute Injuries
Injuries that cause pain immediately. Acute injuries can also cause inflammation and swelling. Cold packs are used to reduce the swelling and pain.
Chronic Injuries
These injuries do not cause inflammation or swelling but it does cause stiffness and joint pain. Hot packs can be applied to reduce the pain.
Cold Packs
In order for the cold packs to be effective in absorbing heat, ammonium nitrate is used for absorbing heat then it is dissolved in water. Within the pack, the water and ammonium nitrate are in separate areas of the pack until cracked. A cold pack does not produce a cold temperature but the cold temperature being felt is the cold pack absorbing the heat from your body. When the ammonium dissolves, the pack gets as cold as 0'C.
Hot Packs
In order for hot packs to be effective in releasing heat, calcium chloride or magnesium sulphate is used for releasing heat when it is dissolved in water. Just like in the cold packs, the chemicals are separated from the water until the package is cracked. When the chemical dissolves, the hot pack's temperature can reach to 90'C.

*Both hot/cold packs can last for about 20 minutes*
Different types of Injuries
Kaitlyn & Kevin
Hot & Cold Packs
Important Notes
When applying heat to the injury, wait around 15-20 minutes at a time and be sure to use enough layers to protect from burning yourself
Cold packs should not be put directly onto the skin due to the risk of frost bite
Social Importance
Athletes need them
Players in sports constantly get injuries
Reliable and easy to use
Very easy access to get hot/cold packs
reduces blood flow to help keep bruising and swelling down
treatment for sprains, strains and minor injuries
used before a hot pack
used to reduce injury
Hot Packs vs Cold Packs
used for increasing blood flow
reduce joint stiffness, pain and muscle spasms
usually used after initial treatment with a cold pack
used to speed the healing process
Full transcript