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Modern medical devices are suited to the environment in which they are to work; therefore, a great emphasis is placed on the examination on human tissues. Such approach also covers the devices intended to diagnose of human digestive system. It’s really important to reduce friction forces during instruments insertion into human body in order to limit discomfort and pain caused to the patient. It’s being achieved by covering colonoscopies with “lignocainum”, yet as the following tests show, such action increases friction slightly. The paper presents the results of examination on friction factor between the intestines and a cube with silicone coat. It’s been decided to examine a number of lubricants to be used while inserting diagnostic devices inside human body in order to limit friction. The lignocainum. Performed tests show that adding of selected substances between intestines and silicone influence resulting friction coefficient. All the observed phenomena that occurred during the experiments were identified and discussed in order to specify their source. The experiments prove that it is possible to reduce friction coefficient between intestines and inserted medical device by using commercially available substances not harmful to human body.

The Influence of Lubricants on Friction Coefficient between the Intestines and a Silicone