The valve body is made of a resilient material which will conform to the shape of the outer wall of a catheter when the catheter penetrates through the slits and opening in the valve body thereby maintaining {HEAD ~ a fluid tight seal} between the outer wall of the catheter and {TAIL ~ the valve body} 
The valve body is made of a resilient material which will conform to the shape of the outer wall of a catheter when the catheter penetrates through the slits and opening in the valve body thereby maintaining { HEAD ~ a fluid tight seal } between the outer wall of the catheter and { TAIL ~ the valve body }
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