This plaster can conveniently test and identify the wearer’s blood type during use, allowing one to skip the stress of drawing blood for testing in hospital.
In undeveloped countries, most people don’t know their blood type because of a lack of medical equipment. Every year, there are many unnecessary deaths caused by incorrect blood transfusions in such countries. This inexpensive plaster is integrated with blood-testing paper, and can conveniently inform people of their blood type through normal use. In emergency situations, such knowledge could increase survival rates. It will also prevent children from having to undergo the pain associated with drawing blood for testing in hospital.