INSERTION SLEEVE FOR AN INSERTION INSTRUMENT

• US 20090221965A1
• Filed: 02/27/2009
• Published: 09/03/2009
• Est. Priority Date: 02/28/2008
• Status: Abandoned Application

• Current Assignee: Peter Osypka
• Original Assignee: Peter Osypka
• Inventors: Osypka, Peter
• Application Number:
  US12/394,527
• Publication Number:
  US 20090221965A1
• Time in Patent Office: Days
• US Class Current: 604/160
• 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 25/0662 Guide tubes

Abstract

An insertion sleeve (1) of a medical insertion instrument, with which a catheter or balloon catheter (2) can be introduced from the outside into a blood vessel and can be moved through the blood vessel to a position to be treated and after treatment can be retracted back through the fluid-tight insertion sleeve (1). The insertion sleeve (1) is expandable over its entire effective length due to one or more breaks, for example, a continuous slit (9), in the inner wall, and furthermore it is also fluid-tight in the expanded state due to a fluid-tight, expandable casing (7) whose extent can be increased due to its elasticity and/or one or more folds (11) existing in the casing corresponding to the widening of the insertion sleeve (1).

Claims

1. Insertion sleeve (1) for a medical insertion instrument, with which a catheter or balloon catheter (2) can be introduced from outside into a blood vessel and can be moved through the blood vessel to a position in an interior of a body to be treated and after treatment can be retracted back through the insertion sleeve (1), the insertion sleeve (1) comprising an inner sleeve wall having a break or breaks defined by at least one continuous slit, several slits extending in a direction of longitudinal extent, or adjacent breaks that are continuous in a radial direction, a spacing between facing edges (6) of the break or breaks can be increased allowing the insertion sleeve (1) to widen in a peripheral direction, and the break or breaks are covered by a fluid-tight casing (7) whose extent can be increased or widened corresponding to the widening of the inner sleeve wall, such that the insertion sleeve (1) is expandable over an entire length and is also fluid-tight in the expanded state.

2. Insertion sleeve according to claim 1, wherein the casing (7) is arranged on an outside of the insertion sleeve wall.

3. Insertion sleeve according to claim 1, wherein the break or breaks comprise the at least one slit (9) that extends over the entire length and that extends parallel to a longitudinal axis, and is open on a distal end (8) and the fluid-tight casing (7) covers the slit (9).

4. Insertion sleeve according to claim 1, wherein the casing (7) does not cover a projection (10) of the inner sleeve wall at a distal end (8).

5. Insertion sleeve according to claim 1, wherein the inner sleeve is formed from flexible crossbars between which the break or breaks are arranged and the crossbars are deformable when the insertion sleeve (1) is widened.

6. Insertion sleeve according to claim 1, wherein the inner sleeve wall is formed from an expandable mesh and/or from expandable wire loops.

7. Insertion sleeve according to claim 1, wherein the break or breaks comprise the slit (9) with a configuration that is straight or that has changing directions or that is helical, and includes edges (6) that are spaced apart from each other in the starting position.

8. Insertion sleeve according to claim 7, wherein the spacing of the edges (6) of the slit (9) has dimensions that change over its length.

9. Insertion sleeve according to claim 1, wherein the expandable casing (7) is at least one of elastic or has at least one fold (11) that can be folded out or unfolded when the insertion sleeve is widened.

10. Insertion sleeve according to claim 1, wherein the casing (7) can slide relative to a surface of the inner sleeve wall.

11. Insertion sleeve according to claim 1, wherein the casing (7) is a tube made from at least one of a biocompatible material, silicone or polyurethane.

12. Insertion sleeve according to claim 11, wherein the inner sleeve wall is made from polytetrafluoroethylene (PTFE) or is coated with PTFE or with silicone or with polyurethane or with a biocompatible material.

13. Insertion sleeve according to claim 1, wherein the casing (7) is drawn onto the inner sleeve wall or is co-extruded with the inner sleeve wall.

14. Insertion sleeve according to claim 1, wherein the break or breaks comprises a slit that is helical or has changing directions in a wave-like or meander-shaped profile.

15. Insertion sleeve according to claim 1, wherein the break or breaks comprise the slit (9) with a configuration that is straight or that has changing directions or that is helical, and includes edges (6) that are in contact with each other in the starting position.