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

1. A kit for treating a blood circulation system, comprising:

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

a sheath for maintaining the treatment element in its retracted state; and

a pulling unit for pulling the treatment element into the sheath,

wherein the pulling unit comprises a sleeve for receiving the treatment element, the sleeve being slidable 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 sleeve when the sleeve moves between its receiving and interposed positions,

wherein the sleeve includes at least one return strand curved back to the outside of the sheath, and the pulling unit includes a pulling element for pulling the at least one return strand towards a proximal end of the sheath, the pulling element being able to slide along the sheath during displacement of the sleeve between its receiving position and its interposed position,

wherein the sleeve includes a retaining end for retaining the treatment element in the receiving position of the sleeve, the pulling element being connected to the retaining end of the sleeve so as to be movable together with the retaining end in translation,

and wherein the pulling element is disposed in the sheath, the sheath comprising at least one lateral passage in which a free end of the sleeve is engaged.

2. The kit according to claim 1 , wherein the sleeve comprises a region for retaining an end of the treatment element and a region for guiding the treatment element, the retaining region and the guiding region being configured such that the guiding region projects outside the sheath when the retaining region is inside the sheath.

3. The kit according to claim 1 , wherein the treatment element is detachably fixed to the pulling unit.

4. The kit according to claim 1 , wherein the pulling unit is configured to extract the treatment element from the sheath.

5. The kit according to claim 1 , wherein the sleeve comprises at least two flexible prongs joined together by a common base and having free ends which are not connected.

6. The kit according to claim 5 , wherein each flexible prong is curved around a distal region of the sheath, the distal region of the sheath being located between a distal end of the sheath and the at least one lateral passage.

7. The kit according to claim 1 , wherein the pulling unit further comprises an element for controlling displacement of the sleeve in relation to the sheath, the controlling element and the sleeve being integral.

8. The kit according to claim 1 , wherein a coefficient of friction between the sleeve and the sheath is less than a coefficient of friction between the treatment element and the sheath.

9. The kit according to claim 1 , wherein the treatment element is an endoprosthesis comprising a deployable frame.

10. The kit according to claim 1 , wherein the treatment element is a deployable valve.

11. The kit according to claim 1 , wherein the pulling unit includes a rod for controlling the displacement of the sleeve, the rod being connected to the pulling element and having a grip.

12. The kit according to claim 1 , wherein the free end of the sleeve is fixed to a proximal surface of the pulling element.