A standard twin mattress is 39 by 75 inches. A king is 76 by 80 inches. This means that a headboard for a king bed is going to be about 76 inches or wider, plenty wide enough to go along the length of a twin bed. Headboards are often slightly wider than the bed for which they are made.
Hemoglobin, Hematocrit, Blood Count. In order to donate blood, a woman must have a hemoglobin level of at least 12.5 g/dL, and a man must have a hemoglobin level of at least 13.0 g/dL. For all donors, the hemoglobin level can be no greater than 20 g/dL.
People who cannot donate blood. Before donating blood, you will be asked to fill out a confidential donor health check form. This makes sure that your blood is suitable for donation.Not everyone can donate blood and the donor health check form ensures that people receiving the blood are not exposed to harmful viruses or infections.It's also to avoid putting you at risk if there's a reason why giving blood might harm you.f you are over 70, you need to have given blood in the last two years to continue donating. Your blood volume may need to be estimated first if you are a women and you: 1  are under 20 years old. 2  weigh under 65kg (10st 3lb).