At 6/7/04 12:10 AM, WadeFulp wrote:
Has anyone here ever given blood or had a blood test? When the blood fills those glass tubes I am wondering if those tubes are a vaccum to help suck in the blood. If that's the case there wouldn't be any oxygen in the tube. Whenever I've had a blood test the blood that fills the tube is very dark red.
Pretty sure theres a vacuum, created by a pump. All the times ive sold plasma, it's been red, not blue.