Large french size hemostatic valve configuration
A hemostasis valve for a vascular introducer includes a valve body having a seal region with opposed substantially planar proximal and distal end surfaces and a central axis extending through the seal region perpendicular to the proximal and distal end surfaces. The seal region has a first grouping of circumferentially arranged and equidistantly spaced linear cuts extending radially outward from the central axis, and through the seal region from the proximal end surface to the distal end surface. The seal region has a second grouping of circumferentially arranged and equidistantly spaced linear cuts in the distal end surface extending tangentially outward from the first grouping of linear cuts, and partially from the distal end surface to a depth short of the proximal end surface to facilitate passage of a variety of sizes of medical devices through the seal region.
1. A hemostasis valve for a vascular introducer comprising:
a valve body including a seal region having substantially planar proximal and distal end surfaces and defining a central axis extending through the seal region substantially perpendicular to the proximal and distal end surfaces;
a first grouping of linear cuts defined in the seal region extending radially outward from the central axis for sealed passage of medical devices through the seal region; and
a second grouping of linear cuts defined in the seal region extending tangentially outward from terminal ends of respective linear cuts within the first grouping of linear cuts, wherein the first grouping of linear cuts extends through the seal region from the proximal end surface to the distal end surface, and wherein the second grouping of linear cuts extends partially from the distal end surface to a depth short of the proximal end surface to facilitate sealed passage of a variety of sizes of medical devices through the seal region.
2. The hemostasis valve of claim 1 , wherein the first grouping of linear cuts are circumferentially arranged and equidistantly spaced, the second grouping of linear cuts are circumferentially arranged and equidistantly spaced, and the first and second groupings of linear cuts contain equal numbers of linear cuts.
3. The hemostasis valve of claim 1 , wherein the first grouping of linear cuts includes 4 to 12 linear cuts and the second grouping of linear cuts includes the same number of linear cuts as the first grouping.
4. The hemostasis valve of claim 1 , wherein the linear cuts in the first grouping of linear cuts protrude through the seal region at an angle of rotation relative to the central axis.
5. The hemostasis valve of claim 4 , wherein the angle of rotation is from about 30 degrees to about 90 degrees.
6. The hemostasis valve of claim 4 , wherein the angle of rotation is about 45 degrees.
7. The hemostasis valve of claim 1 , wherein the linear cuts of the second grouping of linear cuts extend outward at a tangential angle relative to terminal ends of respective linear cuts of the first grouping of linear cuts.
8. The hemostasis valve of claim 7 , wherein the tangential angle is from about 90 degrees to about 270 degrees.
9. The hemostasis valve of claim 7 , wherein the tangential angle is about 91 degrees.
10. The hemostasis valve of claim 1 , wherein the linear cuts of the second grouping of linear cuts extend partially from the distal end surface at an angle of incision relative to the central axis to a depth short of the proximal end surface leaving a remaining thickness of uncut material adjacent to the proximal end surface.
11. The hemostasis valve of claim 10 , wherein the angle of incision is from about 5 degrees to about 65 degrees.
12. The hemostasis valve of claim 10 , wherein the angle of incision is about 22 degrees.
13. The hemostasis valve of claim 10 , wherein the remaining thickness of uncut material adjacent to the proximal end surface is between about 1% and about 50% of the total thickness of the valve body between the proximal and distal end surfaces.
14. The hemostasis valve of claim 10 , wherein the remaining thickness of uncut material adjacent to the proximal end surface is between about 0.005 inches and about 0.020 inches.
15. The hemostasis valve of claim 1 , wherein the valve body includes fixturing apertures radially outward from the second grouping of linear cuts for securing the valve body within a valve housing.
16. The hemostasis valve of claim 1 , wherein the valve body includes a silicone based material.
17. The hemostasis valve of claim 16 , wherein the silicone based material has a durometer hardness of between about 20D and about 35D.
18. The hemostasis valve of claim 1 , wherein the valve body defines a pair of planar slits extending outward from two diametrically opposed linear cuts in the second grouping of linear cuts, wherein the pair of planar slits extends through the valve body from the proximal end surface to the distal end surface.
19. The hemostasis valve of claim 18 , wherein the pair of planar slits extends outwardly from the outer limit of each of the diametrically opposed linear cuts in the second grouping of linear cuts to an outer edge of the valve body.
20. A method comprising:
placing a hemostasis valve as recited in claim 1 into a vascular introducer;
introducing at least one medical device through the hemostasis valve; and
sealing the hemostasis valve to the at least one medical device to prevent efflux of fluid therebetween.
21. A method as recited in claim 20 , further comprising stacking multiple hemostasis valves in one introducer with two or more hemostasis valves stacked adjacent to each other.