HEMOSTATIC VALVE FOR HEART PUMP INTRODUCER

摘要

An introducer sheath for percutaneous insertion of a heart pump includes a tubular sheath body having a wall, a proximal end portion, a distal end portion, and an inner lumen. The introducer sheath includes a hemostatic valve disposed in the proximal end portion and forming a liquid tight seal across the inner lumen of the tubular sheath body. The hemostatic valve includes a valve cavity having a distal end and a proximal end, a first annular restriction formed within the valve cavity and having a first diameter, and a second annular restriction formed within the valve cavity distal to the first annular restriction and having a second diameter. The distal end of the valve cavity is spaced from the second annular restriction by a gap distance and a third diameter of the valve cavity along the gap distance is about equal to or greater than the first and second diameters.

主权项

1. An introducer sheath for percutaneous insertion of a heart pump, the sheath comprising:
a tubular sheath body having a wall, a proximal end portion, a distal end portion, and an inner lumen; a hemostatic valve disposed in the proximal end portion and forming a liquid tight seal across the inner lumen of the tubular sheath body, the hemostatic valve including:
a valve cavity having a distal end and a proximal end;a first annular restriction formed within the valve cavity and having a first diameter;a second annular restriction formed within the valve cavity distal to the first annular restriction and having a second diameter;wherein the distal end of the valve cavity is spaced from the second annular restriction by a gap distance; andwherein a third diameter of the valve cavity along the gap distance is about equal to or greater than the first and second diameters.