Venous access devices, such as heparin locks: A) may be used…

Venous access devices, such as heparin locks: A) may be used by phlebotomists for routine blood collections. B) are used primarily for repeated phlebotomy during a 3-hour glucose tolerance. C) must be flushed with saline prior to collection for special coagulation studies. D) are used to administer medication and should not be used for blood collection.