I asked him whether the tech­nician had a difficult time drawing blood. He replied that ­indeed she had, leaving the tourniquet in place for quite a while. I reassured him and sent him to get ...

uses artificial intelligence and ultrasound imaging to deliver a needle exactly where it is needed to draw blood. It automatically carries out the entire procedure, from applying a tourniquet to ...

The tourniquet, if loosely wound may leak venous ... Encourage the patient to drink water and avoid caffeine 24 hours prior to the blood draw, which may make a huge difference in the procedure.

As we powered through the blood draw — tourniquet on my arm, butterfly needle under her gentle hands, my eyes closed — she started to share. Her husband was strong, healthy and hard-working.