![OTHER: HEMATOLOGIC: BLOOD: Blood tests: Sickle cell preparation: Metabisulfite test for sickle hemoglobin.; Metabisulfite is added to a tube of patients blood. Screen for sickle hemoglobin causes red cells to sickle by removing oxygen. Positive turbidity is gross change for presence of Hb S; with turbidity the line behind the tube disappears. 00210881.jpg](_data/i/upload/2013/08/06/20130806095141-7f5b1f11-me.jpg)
OTHER: HEMATOLOGIC: BLOOD: Blood tests: Sickle cell preparation: Metabisulfite test for sickle hemoglobin.; Metabisulfite is added to a tube of patients blood. Screen for sickle hemoglobin causes red cells to sickle by removing oxygen. Positive turbidity is gross change for presence of Hb S; with turbidity the line behind the tube disappears.