压脉带的使用方法是什么？
What is the use of the pressure band?
一、前臂静脉操作方法
1、 Forearm vein manipulation
1、一根绑在肘关节处，另一根绑在腕关节下，在前臂的背侧可以看到靛蓝色的静脉，见下图箭头所示。用右手食指横向来回触摸皮下若隐若现的静脉，能感觉到静脉的弹性。
1. One is tied to the elbow and the other to the wrist. Indigo veins can be seen on the back of the forearm, as shown by the arrow below. With the right index finger to touch the subcutaneous vein horizontally, you can feel the elasticity of the vein.
2、选择走向相对来说比较直的一段静脉进行穿刺，穿刺时要考虑到进针后导管固定的方向和对患者活动的影响。见回血后松开止血带，用透明敷贴固定留置针。
2. The direction of catheter fixation and the influence on the patient's activity should be considered in the puncture of a relatively straight vein. After the application, the transparent bandage was released.
二、手背静脉操作方法 该方法也可用于手背静脉穿刺。操作时压脉带一根扎在腕关节上方，另一根扎在2～5指的第一节指节处。
2、 This method can also be used for venipuncture. During the operation, one of the compression bands was tied above the wrist joint, and the other was tied at the first knuckle of 2-5 finger