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Biomedical foam, often shortened to biofoam, is a self-sealing, space-filling coagulant and also an antibacterial, tissue-regenerative foam polymer used by the United Nations Space Command as a form of medical first aid. This foam keeps damaged organs in place and helps stop bleeding and hemorrhaging from wounds such as; lacerations, abrasions, contusions, punctures, thermal and/or electric burn wounds. Two chemicals combine creating a mixed-cell foam. Biofoam is inserted into the skin and deployed deeper into the body. It is very painful to use, at least initially, described as feeling like "burning ants crawling around the wound" and "thousands of tiny knives" stabbing the recipient. However, biofoam has been described as being able to numb pain. [note 1]
It is likely that only the application is painful, and that the biofoam quickly numbs the wound after settling. Biofoam does not seem to have this kind of painful reaction when applied to an unwounded area, as the Rookie is seen spraying a small amount on his uninjured fingers and does not react in pain. It is often used as a medical option when there are no medical personnel available. Bottles of biofoam are found in Health kits. Often UNSC medics will use it as a sealing agent during treatment in field hospitals.
The effects of biofoam are temporary, and after a time, usually a few hours, it simply breaks down. Therefore, it is normally a form of first aid, used only as a temporary sealant until proper medical attention can be sought.
- Halo: The Fall of Reach (First appearance)
- Halo: First Strike
- Halo: Landfall
- Halo 3: ODST
- Halo 4: Forward Unto Dawn
- ↑ The Halo 2 Strategy Guide's description of the Mark VI Mjolnir Armor describes biofoam as being able to numb pain. In The Flood, biofoam is said to numb Fitzgerald's Needler wound.
- ↑ Halo: New Blood - Page 57
- ↑ 2.0 2.1 Halo 2: The Official Strategy Guide
- ↑ Halo: The Flood, page ???
- ↑ Halo: The Fall of Reach, page 91
- ↑ Halo: First Strike, page 123: "William retrieved a can of biofoam from the rover and inserted the tip into the tiny injection port in his armor—pushed it through the skin between his fourth and fifth ribs. He filled his abdominal cavity with the space-filling coagulant/antibacterial/tissue-regenerative polymer."