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Venipuncture is one of the common means of testing and treatment in the clinic. It seems to be a very simple action, but when it comes to some patients with small veins, dark skin, excessive subcutaneous fat or severe blood loss and dehydration, it is difficult to directly observe and distinguish the veins with the naked eye, which is also a challenging task. The treatment or resuscitation will be delayed if the nursing staff fails to puncture or repeats the puncture.Read More