Reduction of the Insertion Force of Medical Devices into Biological Tissue by the Additional Mechanical Vibration

Abstract

Because the pain during the insertion of medical devices, e.g. hypodermic needles or endoscopes, must be caused by the friction between the surface of a device and biological tissue, we think the pain can be reduced by the lubrication technique. In this study. Applying the mechanical vibration reduces the insertion force was proposed. The insertion force of the hypodermic needle into muscle of chicken was detected by a load transducer. The effect of the vibration was added on the needle was assessed under the experimental conditions of different frequencies. The insertion force of hypodermic needle was reduced to 67% of that under no vibration by the addition of vibration of 500Hz.