Treatment kit, treatment device, and associated method of production

1. A treatment kit, comprising:

a first implant, the first implant comprising a first tubular body, an outer surface thereof having a void therein that defines a window;

a second implant comprising a second tubular body positionable within the window of the first tubular body so as to protrude relative to the first implant, the second implant further comprising a retaining member configured to retain the second implant relative to the first implant; and

a retaining ring that retains the second implant, said retaining ring provided on the first tubular body in the window and delimiting an insertion passage for the second implant, the retaining ring being elastic so as to be elastically deformable in the window such to permit the insertion passage to reversibly increase by at least 20%,

wherein the retaining ring comprises first and second annular collars, each defined by an outer perimeter, an inner perimeter, and a central void delimited by the inner perimeter, and a connecting portion that extends laterally from the inner perimeter of the first collar to an inner perimeter of the second collar to form the insertion passage, a length of the connecting portion spacing the first collar from the second collar, a space extending radially from an outward-facing surface of the connecting portion, and between opposing inward-facing radial surfaces of the first and second collars, defining a housing that extends at least partially around the window, and

wherein an elastic member is positioned inside the housing, and

wherein a portion that surrounds the window of the first tubular body is received within the housing, a radial surface of the first collar fastened on the outer surface of the first tubular body, and an opposite-facing radial surface of the second collar fastened on an inner surface of the first tubular body.

2. The kit according to claim 1 , wherein the second implant is movable relative to the first implant between an idle position spaced away from the window and an active position implanted in the window, the retaining ring being elastically deformed when the second tubular body is positioned in the window, an inner contour of the insertion passage having a shape conjugated with an outer contour of the second tubular body situated in contact with the retaining ring.

3. The kit according to claim 1 , wherein the elastic member is a helical spring.

4. The kit according to claim 1 , wherein the first collar, the second collar and the connecting portion are integral.

5. The kit according to claim 1 , wherein the retaining member of the second implant is formed by a radial deployable collar.

6. The kit according to claim 1 , wherein the second implant is auto-expandable between a retracted configuration and a deployed configuration.

7. The kit according to claim 1 , wherein the first tubular body is a tubular endoprosthesis, and the second tubular body is a tubular endoprosthesis.

8. The kit according to claim 1 , wherein the first tubular body delimits a central passage extending along a longitudinal axis between a first axial opening and a second axial opening, the window being a lateral window emerging transversely relative to the longitudinal axis between the axial openings.

9. The kit according to claim 1 , wherein the retaining ring comprises an extension limiter.

10. The kit according to claim 1 , wherein the retaining ring is elastically deformable in the window to allow a reversible increase of at least 30% of the insertion passage.

11. A treatment device, comprising:

a first implant comprising a first tubular body, an outer surface thereof having a void therein that defines a window; and

a retaining ring configured to retain a second implant, assembled to the window and delimiting an insertion passage for the second implant,

wherein the retaining ring is elastically deformable in the window such to permit a reversible increase, of at least 20%, of the insertion passage,

wherein the retaining ring comprises first and second annular collars, each defined by an outer perimeter, an inner perimeter, and a central void delimited by the inner perimeter, and a connecting portion that extends laterally from the inner perimeter of the first collar to an inner perimeter of the second collar to form the insertion passage, a length of the connecting portion spacing the first collar from the second collar, a space extending radially from an outward-facing surface of the connecting portion, and between opposing inward-facing radial surfaces of the first and second collars, and

wherein an elastic member is positioned inside the housing, and

wherein a portion of the first tubular body that surrounds the window is received within the housing, a radial surface of the first collar fastened on the outer surface of the first tubular body, and an opposite-facing radial surface of the second collar fastened on an inner surface of the first tubular body.

12. The treatment device according to claim 11 , wherein the retaining ring is elastically deformable in the window to allow a reversible increase of at least 30% of the outer contour of the insertion passage.

13. A method for manufacturing a treatment device with a first implant comprising a first tubular body that includes a window where an end of a second implant attaches, the method comprising the following steps:

providing the first implant; and

fastening a retaining ring for retaining the second implant into the window of the first implant, the retaining ring delimiting an insertion passage for the second implant,

said fastening of the retaining ring including the sub-steps of:

providing the retaining ring as an assembly of first and second annular collars, defined by an outer perimeter, an inner perimeter, a central void delimited by the inner perimeter, and a connecting portion that extends laterally from the inner perimeter of the first collar to an inner perimeter of the second collar to form the insertion passage,

a space extending radially from an outward-facing surface of the connecting portion, and between opposing inward-facing radial surfaces of the first and second collars, delimiting housing;

placing an elastic member into the housing; and

receiving portions of the first tubular body located at the window inside the housing.

14. The method according to claim 13 , wherein the sub-steps further include fastening the first annular collar on an outer surface of the first tubular body, and fastening the second annular collar on an inner surface of the first tubular body.

15. The method according to claim 13 , further comprising:

a step for manufacturing the retaining ring, including

forming a tube;

creating a throttle in the tube; and

freezing the throttle in the tube to form the housing.