A new extended hemostasis valve for sheaths is presented, with minimized stick-slip behavior to be used in (heart) catheterization procedures during long interventions (3–6 h). The invented extension to this existing sheath bypasses the silicone rubber sealing (hemostasis valve) and replaces it with a dedicated seal with the two functions separated: (1) sealing around the catheter being used and (2) closing the sheath when the catheter is removed (valve function). Measurements have been performed on the current and the invented seals, showing that the axial friction force is reduced, with a factor of 6.4, from 1.4 N to 0.22 N.

Issue Section:
Research Papers
Keywords:
cardiovascular device, human performance/force assessment, medical device design process, minimally invasive devices, cardiovascular system, catheters, friction, silicone rubber, surgery
Topics:
Catheters, Friction, Valves, Design, Silicone rubber, Biomedicine, Feedback
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Copyright © 2009
 by American Society of Mechanical Engineers
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