Sheath device for inserting a catheter

Patent metadata

Field	Value
Publication number	US-11135405-B2
Application number	US-201916696664-A
Country	US
Kind code	B2
Filing date	Nov 26, 2019
Priority date	Dec 22, 2011
Publication date	Oct 5, 2021
Grant date	Oct 5, 2021

Abstract

In a sheath device for inserting a catheter into a patient's body, comprising a first sheath having a proximal end and a distal end, wherein when used as intended the distal end of the first sheath is provided for arrangement in the patient's body and the proximal end of the first sheath is provided for arrangement outside the patient's body, and wherein the first sheath comprises a tubular section and a sheath housing, which is disposed at the proximal end of the section and comprises a receiving channel for a catheter, according to the invention the tubular section is detachably held in a clamping element of the sheath housing in a non-positive manner so as to be able to easily shorten the tubular section.

First claim

The invention claimed is:

1. An introducer sheath device comprising:
a sheath housing having a guide channel extending in a radial direction;
a first sheath located within the sheath housing and configured to move in a longitudinal direction relative to the sheath housing, the sheath configured to allow passage of a catheter therein; and
a cutting device comprising
a first blade moveably positioned between the sheath and the sheath housing,
wherein the first blade is configured to cut the sheath as the first blade moves in the longitudinal direction relative to the sheath housing and wherein the guide channel is a fluid tight channel through the sheath housing.

2. The sheath device of claim 1 , wherein the cutting device further comprises a second blade positioned opposite the first blade within the sheath housing.

3. The sheath device of claim 2 , wherein the first blade and the second blade cut the sheath in the longitudinal direction during a movement of the first sheath in an axial direction.

4. The sheath device of claim 3 , wherein the first blade cuts in the longitudinal direction, the second blade cuts in a circumferential direction, and wherein the cutting device further comprises a third blade, wherein the third blade cuts in the circumferential direction.

5. The sheath device of claim 1 , wherein the guide channel extending in a radial direction comprises at least one of:
at least one blade holder;
a sealing element providing a fluid-tight connection between the sheath housing and the first sheath; or
a suspension element.

6. The sheath device of claim 5 , wherein the guide is configured to displace the first blade in the radial direction.

7. The sheath device of claim 6 , wherein the first blade is displaceable between at least one cutting position and a non-cutting position.

8. The sheath device of claim 7 , wherein in the non-cutting position the first blade does not protrude into a receiving channel of the first sheath.

9. The sheath device of claim 7 , wherein the guide further comprises a spring which provides a counterforce for displacement of the first blade.

10. The sheath device of claim 1 , wherein the fluid-tight guide channel encloses the first blade.

11. The sheath device of claim 1 , further comprising a second sheath fixed within the first sheath, the second sheath configured to allow passage of the catheter therethrough.

12. The sheath device of claim 11 , wherein the second sheath is fixed by a clamping element of the sheath housing.

13. The sheath device of claim 11 , wherein the first sheath is configured to allow passage of the catheter from the second sheath into the first sheath.

14. The sheath device of claim 13 , wherein the first blade is configured to cut the second sheath after passage of the catheter therethrough.

15. The sheath device of claim 1 , wherein a blood pump is connected to a distal end of the catheter.

16. A method for using a sheath cutter device, the method comprising:
inserting a first sheath into a sheath housing, the sheath housing including a first blade positioned between the sheath and the sheath housing;
actuating a movement of the first blade in a radial direction within the sheath housing from a non-cutting position to a cutting position, wherein the movement of first blade is configured to cut the first sheath; and
cutting the first sheath with the first blade.

17. The method of claim 16 , wherein the first blade is actuated by a guide having at least one of a blade holder, a sealing element, or a suspension element.

18. The method of claim 16 , further comprising:
clamping a second sheath within the first sheath, wherein the second sheath is
clamped by a clamping element of the sheath housing.

19. The method of claim 18 , wherein the second sheath encloses a catheter, and wherein the first sheath and the second sheath are configured to allow passage of the catheter therethrough.

20. The method of claim 19 , further comprising:
transferring the catheter from the second sheath to the first sheath.

21. The method of claim 20 , further comprising:
actuating the movement of the first blade within the sheath housing, wherein the movement of the first blade is configured to cut the second sheath; and
cutting the second sheath with the first blade.

22. The sheath device of claim 2 , wherein the first blade cuts in the longitudinal direction, and the second blade cuts in a circumferential direction.

Assignees

• Ecp Entw Mbh

Inventors

• Schumacher Joerg
• Bredenbreuker Lars
• Decke Robert

Classifications

• A61M60/865 Primary

  Devices for guiding or inserting pumps or pumping devices into the patient's body · CPC title

• A61M60/216

  including a rotating member acting on the blood, e.g. impeller · CPC title

• A61M60/178

  drawing blood from a ventricle and returning the blood to the arterial system via a cannula external to the ventricle, e.g. left or right ventricular assist devices · CPC title

• A61M25/01

  Introducing, guiding, advancing, emplacing or holding catheters (A61M25/10 takes precedence) · CPC title

• A61M25/0097

  characterised by the hub (connectors A61M39/10) · CPC title