Elastic Introducer Sheath

• US 20140121629A1
• Filed: 03/08/2013
• Published: 05/01/2014
• Est. Priority Date: 10/26/2012
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Macaulay, Patrick, Peter, Stephen
• Granted Patent: US 9,192,751 B2
• Time in Patent Office: Days
• US Class Current: 604/500
• CPC Class Codes: A61B 17/3439 with means for changing the inner diameter of the cannula, e.g. expandable A61B17/3423, A61B17/3431 take precedence; catheters A61M25/0662
• CPC Class Codes: A61M 2025/0024 Expandable catheters or sheaths
• CPC Class Codes: A61M 2025/0687 having means for atraumatic insertion in the body or protection of the tip of the sheath during insertion, e.g. special designs of dilators, needles or sheaths
• CPC Class Codes: A61M 25/0023 by the form of the lumen, e.g. cross-section, variable diameter
• CPC Class Codes: A61M 25/005 with embedded materials for reinforcement, e.g. wires, coils, braids
• CPC Class Codes: A61M 25/0662 Guide tubes
• CPC Class Codes: A61M 39/0247 Semi-permanent or permanent transcutaneous or percutaneous access sites to the inside of the body peritoneal dialysis catheters A61M1/285; tracheostomy devices A61M16/0465; measuring pressure within the body A61B5/03; colostomy devices A61F5/445; gastrotomy feeding tubes A61J15/0015; means for fixing a feeding tube outside of the body A61J15/0053

Abstract

An elastic percutaneous elastic introducer sheath is disclosed which can locally expand and reduce to accommodate a transcatheter medical device. The elastic introducer sheath includes a non-circumferentially continuous wire structure, a liner, and a jacket.

Claims

1. An elastic surgical access device comprising:

a circumferentially continuous biocompatible material layer;

a non-circumferentially continuous wire structure extending along a length of the access device and having a longitudinal gap in an expanded configuration of the access device; and

a non-circumferentially continuous biocompatible material layer connected to the wire structure and to the circumferentially continuous biocompatible material layer, the non-circumferentially continuous biocompatible material layer having a longitudinal gap in the expanded configuration.

2. The elastic surgical access device of claim 1, wherein the wire structure is curved to form a C-shape in the radial direction.

3. The elastic surgical access device of claim 1, wherein the wire structure has a sinusoid shaped wire pattern along the longitudinal direction.

4. The elastic surgical access device of claim 1, wherein the wire structure has a square shaped wire pattern along the longitudinal direction.

5. The elastic surgical access device of claim 1, the wire structure further comprising a first loop extending in a first radial direction and a second loop extending in a second radial direction, the first loop and the second loop overlap in a non-expanded configuration of the access device.

6. An locally expandable surgical access device comprising:

a curved non-circumferentially continuous wire structure extending along a length of the access device;

a non-circumferentially continuous biocompatible material layer connected to the wire structure; and

a circumferentially continuous biocompatible material layer connected to the non-circumferentially continuous biocompatible material layer.

7. The locally expandable surgical access device of claim 6, further comprising a longitudinal gap extending between a first radial portion of the wire structure and a radial portion of the wire structure in an expanded configuration of the locally expandable surgical access device.

8. The locally expandable surgical access device of claim 6, further comprising a longitudinal gap extending between a first radial edge of the non-circumferentially continuous biocompatible material layer and a radial second edge of the non-circumferentially continuous biocompatible material layer in an expanded configuration of the locally expandable surgical access device.

9. The locally expandable surgical access device of claim 6, expandable from a first diameter to a second diameter to allow passage of a transcatheter medical device.

10. The locally expandable surgical access device of claim 9, reducable from the second diameter to a third diameter.

11. The locally expandable surgical access device of claim 10, wherein the third diameter is equal to the first diameter.

12. The locally expandable surgical access device of claim 6, further comprising a first fold in the circumferentially continuous biocompatible material layer around a first edge of the non-circumferentially continuous biocompatible material layer in a non-expanded configuration of the locally expandable surgical access device.

13. The locally expandable surgical access device of claim 12, further comprising a second fold in the circumferentially continuous biocompatible material layer around a second edge of the non-circumferentially continuous biocompatible material layer in the non-expanded configuration of the locally expandable surgical access device.

14. The locally expandable surgical access device of claim 12, wherein the first fold and the second fold flatten in an expanded configuration of the locally expandable surgical access device.

15. The locally expandable surgical access device of claim 6, the curved non-circumferentially continuous wire structure including a plurality of straight portions and a plurality of curved portions.

16. The locally expandable surgical access device of claim 6, the curved non-circumferentially continuous wire structure having a sinusoid pattern.

17. A method for percutaneously introducing a medical device into a patient'"'"'s body, comprising:

percutaneously introducing a distal end of an elastic surgical access device into the patient'"'"'s body, the elastic surgical access device including a non-circumferentially continuous wire structure extending along a length of the access device, a first biocompatible material layer, and a second biocompatible material layer;

passing the medical device through the access device; and

expanding a section of the access device from a first diameter to a second larger diameter approximately equal to the outer diameter of the medical device as the medical device passes through the section of the access device.

18. The method of claim 17, further comprising reducing the access device from the second diameter after the medical device passes through the section of the access device.

19. The method of claim 17, further comprising reducing the access device from the second diameter to a third diameter after the medical device passes through the section of the access device.

20. The method of claim 17, further comprising reducing the access device from the second diameter to the first diameter after the medical device passes through the section of the access device.