A Patient Has Difficult Veins, and a Winged Infusion Set

A patient has difficult veins, and a winged infusion set is used to collect the blood from a small vein in the patient's hand. After successfully filling all the SST tubes, the phlebotomist proceeds to fill the light blue-top tube but is unsuccessful. She changes tubes, thinking that it might be a tube with a lost vacuum, but there is still no blood flow. She inspects the entry site and notices some bruising around it that was not present before. Discuss possibilities of the unsuccessful draw, and explain how to correct them.

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A lost vacuum is the most common reason ...

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