Kit for inserting a cavity-treatment element and method for preparing an associated treatment element

• US 20090299449A1
• Filed: 05/15/2006
• Published: 12/03/2009
• Est. Priority Date: 05/19/2005
• Status: Active Grant

• Current Assignee: Cormove
• Original Assignee: Perouse Medical Co.
• Inventors: Styrc, Mikolaj Witold
• Granted Patent: US 8,202,309 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/97 the outer sleeve being splittable

Abstract

The kit comprises an implantable treatment element (13) which can be radially deformed between a retracted state and a deployed state, and a sheath (15) for maintaining the treatment element (13) in its retracted state. The kit also comprises means (19) for pulling the treatment element (13) into the sheath (15), comprising a sleeve (17) for receiving the treatment element (13) which can slide in relation to the sheath (15) between an expanded position for receiving the treatment element (13) and a compressed interposed position between the treatment element (13) and the sheath (15).

The treatment element (13) is substantially axially fixed in relation to the receiving sleeve (17) when said sleeve (17) moves between its receiving and interposed positions.

The invention can be used to insert endoprostheses into a blood vessel.

Claims

1. Kit for treating a blood circulation system, comprising:

at least one implantable treatment element which can be radially deformed between a retracted state and a deployed state;

a sheath for maintaining the treating element in its retracted state;

means for pulling the treatment element into the sheath;

characterised in that the introduction means comprise at least one sleeve for receiving the treatment element, which can slide in relation to the sheath between an expanded position for receiving the treatment element outside the sheath and a compressed interposed position between the treatment element and the sheath, the treatment element being substantially axially fixed in relation to the receiving sleeve when the receiving sleeve moves between its receiving and interposed positions, and in that the sleeve comprises at least one return strand curved back to the outside of the sheath, the introduction means comprising an element for pulling the or each curved strand towards a proximal end of the sheath, the pulling element being able to slide along the sheath when the sleeve is displaced between its receiving position and its interposed position.

2. Kit according to claim 1, characterised in that the receiving sleeve comprises a region for retaining an end of the treatment element and a region for guiding the treatment element when the retaining region is inside the sheath and the guiding region projects outside the sheath.

3. Kit according to either claim 1, characterised in that the treatment element is detachably fixed to the introduction means.

4. Kit according to claim 1, characterised in that the introduction means form the means for extracting the treatment element from the sheath.

5. Kit according to claim 1, characterised in that the receiving sleeve comprises at least two flexible prongs joined together by a common base and having free ends which are not connected.

6. Kit according to claim 1, characterised in that the introduction means comprise an element for controlling displacement of the receiving sleeve in relation to the sheath, the controlling element and the receiving sleeve being integral.

7. Kit according to claim 1, characterised in that the coefficient of friction between the receiving sleeve and the sheath is less than the coefficient of friction between the treatment element and the sheath.

8. Kit according to claim 1, characterised in that the treatment element is an endoprosthesis comprising a deployable frame.

9. Kit according to claim 1, characterised in that the treatment element is a deployable valve.

10. Kit according to claim 1, characterised in that the sleeve comprises, in its receiving position, an end for retaining the endoprosthesis, the pulling element being integral with a free end of the sleeve.

11. Kit according to claim 10, characterised in that the pulling element comprises a collar slidingly mounted to the outside of the sheath.

12. Kit according to claim 10, characterised in that the pulling element is connected in translation to the retaining end.

13. Kit according to claim 12, characterised in that the pulling element is disposed in the sheath, the sheath comprising at least one lateral passage in which the free end of the sleeve is engaged.

14. Kit according to claim 13, taken in combination with the receiving sleeve comprising at least two flexible prongs joined together by a common base and having free ends which are not connected, characterised in that each flexible prong is curved around a distal region of the sheath (15) delimited by a lateral passage and a distal end of the sheath.