Introducer sheath with braided filament securement mechanism
View Patent ↗A tubular body for a medical device for insertion within a body passageway of a patient. The tubular body includes a tubular inner liner. A braided member is disposed along an outer surface of the liner. The braided member includes intersecting filaments and cells defined by the filaments. A securement mechanism, such as radiopaque solder, is disposed along a circumferential region of the braided member. The securement mechanism is attached to portions of the filaments and spans the cells that correspond to the circumferential region to inhibit relative movement of filament ends. An outer surface of the securement mechanism is sized to extend radially outward to a position up to an outer surface of the braided member to not add to the overall wall thickness of the tubular body. An outer jacket is positioned longitudinally around the braided member and connected to the inner liner.
1. A tubular body for a medical device comprising:
a tubular inner liner having an outer surface;
a braided member disposed along the outer surface of the inner liner, the braided member having a proximal end and a distal end, and including a plurality of intersecting filaments and a plurality of cells defined by the intersecting filaments, the braided member comprising a braided filament securement mechanism disposed along a circumferential region located at the distal end of the braided member and configured to inhibit relative movement of the filaments, the securement mechanism attached to portions of the filaments and spanning the cells that correspond to the circumferential region, wherein the securement mechanism fills one or more of the cells that correspond to the circumferential region, wherein an outer surface of the braided member is positioned at or beyond an outer surface of the securement mechanism, the securement having a thickness which is not greater than a thickness of the braided member; and
an outer jacket positioned longitudinally around the braided member, and connected to said inner liner.
2. The tubular body of claim 1 , wherein the securement mechanism comprises a radiopaque material.
3. The tubular body of claim 1 , further comprising a coiled member having a plurality of turns disposed over at least a portion of the braided member and the inner liner.
4. The tubular body of claim 1 , further comprising a coiled member having a plurality of turns disposed over the inner liner and underneath at least a portion of the braided member.
5. The tubular body of claim 1 , wherein the inner liner comprises a lubricious fluoropolymer.
6. The tubular body of claim 5 , wherein the outer surface of the inner liner comprises a roughened outer surface, and wherein the outer jacket is bonded to the inner liner at the roughened outer surface.
7. The tubular body of claim 1 , wherein the securement mechanism comprises a radiopaque solder material.
8. The tubular body of claim 7 , wherein the braided member further comprises multiple securement mechanisms, the securement mechanisms being axially spaced from one another at regular intervals.
9. The tubular body of claim 1 , wherein the outer jacket comprises a heat formable polyamide material.
10. The tubular body of claim 1 , wherein distal ends of the respective outer jacket and inner liner extend distally beyond the distal end of the braided member to form a nonbraided region in the tubular body.
11. The tubular body of claim 1 , wherein said securement mechanism comprises a polymer having filaments comprising a radiopaque material.
12. An introducer sheath comprising:
a tubular inner liner having an outer surface;
a braided member disposed along the outer surface of the inner liner, the braided member having a proximal end and a distal end, and including a plurality of intersecting filaments and a plurality of cells defined by the intersecting filaments, the intersecting filaments defining an outer surface and an inner surface of the braided member, the braided member comprising a braided filament securement mechanism disposed along a circumferential region of the braided member and configured to inhibit relative movement of filament ends, wherein the thickness of the securement mechanism is sized to fit between the outer and inner surfaces of the braided member, wherein the securement mechanism comprises a radiopaque solder rigidly fused to portions of the filaments and spanning the cells that correspond to the circumferential region, wherein the securement mechanism fills one or more of the cells that correspond to the circumferential region, the securement having a thickness which is not greater than a thickness of the braided member;
a coiled member disposed along the outer surface of the inner liner; and
an outer jacket positioned longitudinally around the braided member, and connected to said inner liner.
13. The introducer sheath of claim 12 , wherein the securement mechanism is disposed along a distal region of said sheath, the distal region being movable between an arcuate configuration and a linear configuration.
14. The introducer sheath of claim 12 , further comprising a plurality of securement mechanisms axially spaced from one another at regular intervals.