tourniquet - a soft rubber strip typically about 1 inch wide and 15th 18 inches long used on the arm to help find a site for venipuncture. The ends are stretched around a patient's arm about 3 inches above the venipuncture area. The tightening of the tourniquet causes venous filling in the veins and enables better visualization and feel of the prominent veins in the area
Capillary tubes - disposable narrow-bore pipettes that are used for pediatric blood collections and/or micro hematocrit measures. The tubes may be coated with anticoagulant such as heparin, and for safety reasons are usually made of plastic.