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.
Weâll take your blood pressure at the time of donation. You cannot donate if your systolic pressure is below 90 mm Hg or above 180 mm Hg, or if your diastolic pressure is below 50 mm Hg or above 100 mm Hg. (âHgâ is a measurement of pressure in terms of millimetres of mercury.) This one can be complicatedâso call us!