INTRODUCER SHEATH WITH BRAIDED FILAMENT SECUREMENT MECHANISM

• US 20130018318A1
• Filed: 06/27/2012
• Published: 01/17/2013
• Est. Priority Date: 07/15/2011
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Tekulve, Kurt J., Deckard, Michael D., Ravichandran, Mahendran, Reynolds, Michelle
• Granted Patent: US 9,486,605 B2
• Time in Patent Office: Days
• US Class Current: 604/172
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/3468 for implanting or removing devices, e.g. prostheses, implants, seeds, wires devices for implanting seeds A61M37/0069
• CPC Class Codes: A61B 2017/00305 Constructional details of the flexible means
• CPC Class Codes: A61M 2025/0059 having means for preventing the catheter, sheath or lumens from collapsing due to outer forces, e.g. compressing forces, or caused by twisting or kinking
• CPC Class Codes: A61M 25/0012 with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0053 having a variable stiffness along the longitudinal axis, e.g. by varying the pitch of the coil or braid
• CPC Class Codes: A61M 25/0108 using radio-opaque or ultrasound markers
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 2101/04 Tubular or hollow articles

Abstract

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.

Claims

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 an outer surface of the braided member is positioned at or beyond an outer surface of the securement mechanism; 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;

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.

15. A method for manufacturing a tubular body for a medical device, comprising:

applying solder to a circumferential region of a braided member for an axial length, wherein the braided member includes a plurality of intersecting filaments and a plurality of cells defined by the intersecting filaments, wherein the solder rigidly fuses portions of the intersecting filaments and spans the cells, wherein an outer surface of the braided member is positioned at or beyond an outer surface of the securement mechanism;

positioning the braided member over at least a portion of an inner liner tube; and

securing an outer layer tube over the inner liner tube and the braided member.

16. The method of claim 15, wherein the applying step further comprises removing portions of the solder so that the outer surface of the braided member extends at least beyond the outer surface of the solder.

17. The method of claim 15, further comprising cutting the solder along the axial length to shorten the axial length of the solder.

18. The method of claim 15, wherein the applying step further comprises applying solder to multiple circumferential regions of the braided member.

19. The method of claim 18, wherein the multiple circumferential regions are axially spaced at regular intervals.

20. The method of claim 15, further comprising positioning a coiled member over at least a portion of the inner liner tube, wherein the securing step further comprises securing the outer layer tube over the inner tube, the braided member, and the coiled member.

21. A method for manufacturing a tubular body for a medical device, comprising:

applying a securement mechanism of a first material to at least an end of a braided member without applying the securement mechanism to an entire length of the braided member, wherein the braided member includes a plurality of intersecting filaments and a plurality of cells defined by the intersecting filaments, wherein the first material fuses portions of the intersecting filaments and spans the cells, wherein an outer surface of the braided member is positioned at or beyond an outer surface of the securement mechanism;

positioning the braided member over at least a portion of an inner liner tube of a second material; and

securing an outer layer tube of a third material over the inner liner tube and the braided member.

22. The method of claim 21, wherein the first material is solder.

23. The method of claim 21, wherein the first material is an adhesive.

24. The method of claim 21, wherein the first material is applied to the braided member by spraying.