Skin seal device and assembly thereof

A skin seal device assembly for making a substantially gas-tight seal with the skin of a patient having a wall with an incision therein and for receiving an introducer comprising an integral body having proximal and distal extremities and having a flow passage extending from the proximal to the distal extremity, said body having a first outer cylindrical surface extending from the distal extremity toward the proximal extremity and having a substantially uniform diameter and a second outer tapered surface extending from the first surface toward the proximal extremity and having a gradually increasing diameter, a continuous helical thread of the same number of threads per inch for the first outer cylindrical surface and the second outer tapered surface without a discontinuity formed on the first and second outer surfaces extending from the distal extremity towards the proximal extremity and means carried by the proximal extremity of the body for receiving the introducer to have the same extend through the body and movable between releasing and engaging positions with respect to the introducer, said distal extremity of said body being provided with a chamfer, said thread commencing on said chamfer and extending over said chamfer.