Pulse Oximeter Rechargeable LOOKEE Ring Oxygen Monitor Wearable Pulse Oximeter With Vibration Alerts & App Tracking The vibration source position in this study (a) on the index finger Download Scientific Diagram Hand Arm Vibration Syndrome Causes and Prevention NASP The acupoint on the back of the thumb is LI4 (Large Intestine 4), also known as Hegu, located on the fleshy web between the base of the thumb and index finger, and Finger Numbness and Tingling (Median Nerve Mobilization) ToolBox Talk #42: HAND ARM VIBRATION SYNDROME (HAVS) As the majority of our operations involves working with our hands in some capacity whether it is hitting a hammer, using power tools,