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When blood is drawn in the hospital, there are policies regarding the way the tubes are handled, part of which is strict labeling requirements. The Joint Commission and the agencies that accredit the labs have plenty to say about this.
Considering that drawing blood in the field is going to have no impact on the patients outcome, it just isn't worth the expense and risk of doing it in the field.
Considering that drawing blood in the field is going to have no impact on the patients outcome, it just isn't worth the expense and risk of doing it in the field.