Sickledex; Hgb S test
Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
Iron deficiency or blood transfusions within the past 3 months can cause a false negative result.
Saunthararajah Y, Vichinsky EP. Sickle cell disease – clinical features and management. In: Hoffman R, Benz EJ, Shattil SS, et al, eds. Hematology: Basic Principles and Practice. 5th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2008:chap 43.
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