Contraction of an annuloplasty structure

1. An apparatus for use at a heart of a subject, the apparatus comprising an annuloplasty implant that comprises:

a flexible sleeve having a first sleeve-end-portion, a second sleeve-end-portion, and a circumferential wall that defines a longitudinal lumen between the first and second sleeve-end-portions; and

an elongate contraction wire having a first wire-end and a second wire-end, the first wire-end being attached to the sleeve at the first sleeve-end-portion, and the wire extending, in association with the circumferential wall, from the first sleeve-end-portion to the second sleeve-end-portion,

wherein the wire is arranged with respect to the sleeve such that increasing a longitudinal proportion of the wire that is disposed within the lumen longitudinally contracts the sleeve.

2. The apparatus according to claim 1 , further comprising a plurality of anchors, each anchor of the plurality of anchors being independently advanceable into the lumen, and configured to anchor the sleeve to tissue by being driven through the circumferential wall and into the tissue.

3. The apparatus according to claim 1 , wherein the second wire-end is disposed within the lumen, and the wire is arranged with respect to the sleeve such that movement of the second wire-end toward the first sleeve-end-portion increases the longitudinal proportion of the wire that is disposed within the lumen by drawing the wire into the lumen.

4. The apparatus according to claim 1 , wherein the wire extends from the first sleeve-end-portion to the second sleeve-end-portion in association with the circumferential wall, by weaving along the circumferential wall between the first sleeve-end-portion and the second sleeve-end-portion.

5. The apparatus according to claim 1 , further comprising a one-way mechanism, coupled to the wire, configured to allow one-way movement of the wire through the one-way mechanism, and coupled to the sleeve at the second sleeve-end-portion in an arrangement that (i) allows increasing the longitudinal proportion of the wire that is disposed within the lumen, and (ii) inhibits reducing the longitudinal proportion of the wire that is disposed within the lumen.

6. The apparatus according to claim 1 , further comprising:

a plurality of anchors, each anchor of the plurality of anchors:

comprising an anchor head and a tissue-engaging element,

being independently advanceable into the lumen, and

being configured to anchor the sleeve to tissue by the tissue-engaging element being driven through the circumferential wall and into the tissue while the anchor head remains in the lumen; and

a contraction tool that comprises a wire-engaging element, wherein the wire-engaging element, subsequently to anchoring of the sleeve using the anchors:

is movable longitudinally into the lumen and through the lumen to the second wire-end,

is reversibly couplable, within the lumen, to the second wire-end, and

while coupled to the second wire-end, is movable longitudinally through the lumen and past the anchor heads toward the first sleeve-end-portion, such that the second wire-end is moved toward the first sleeve-end-portion, thereby drawing the wire into the lumen and longitudinally contracting the sleeve.

7. The apparatus according to claim 1 , further comprising a contraction tool that comprises a wire-engaging element, wherein the wire-engaging element:

is movable longitudinally into the lumen and through the lumen to the second wire-end,

is reversibly couplable to the second wire-end, and while coupled to the second wire-end, is movable longitudinally toward the first sleeve-end-portion, such that the second wire-end is moved toward the first sleeve-end-portion, thereby drawing the wire into the lumen and longitudinally contracting the sleeve.

8. The apparatus according to claim 1 , further comprising a locking mechanism that has:

an unlocked state in which the locking mechanism allows movement of the wire through the locking mechanism, and increasing of the longitudinal proportion of the wire that is disposed within the lumen, and

a locked state in which the locking mechanism inhibits movement of the wire through the locking mechanism.

9. The apparatus according to claim 8 , wherein the locking mechanism is a component of the annuloplasty implant and is coupled to the sleeve, and the annuloplasty implant is transluminally-advanceable to the heart with the locking mechanism coupled to the sleeve.

10. The apparatus according to claim 8 , further comprising a contraction tool that comprises a wire-engaging element, wherein

the wire-engaging element:

is movable longitudinally into the lumen and through the lumen to the second wire-end,

is reversibly couplable, within the lumen, to the second wire-end, and

while coupled to the second wire-end, is movable longitudinally toward the first sleeve-end-portion, such that the second wire-end is moved toward the first sleeve-end-portion, thereby drawing the wire into the lumen and longitudinally contracting the sleeve, and

the locking mechanism:

is coupled to the contraction tool, and

is advanceable, using the contraction tool, longitudinally through the lumen toward the second sleeve-end-portion and the wire.

11. The apparatus according to claim 8 , further comprising a lock tool that engages the locking mechanism, and is configured to transition the locking mechanism into the locked state.

12. The apparatus according to claim 11 , wherein the locking mechanism is biased to assume the locked state, the lock tool is configured to retain the locking mechanism in the unlocked state while the lock tool is engaged with the locking mechanism, and the lock tool is configured to transition the locking mechanism into the locked state by disengaging from the locking mechanism.

13. The apparatus according to claim 1 , wherein:

the annuloplasty implant further comprises an adjustment mechanism coupled to the sleeve at the second sleeve-end-portion and coupled to the wire, and

the adjustment mechanism is configured such that actuation of the adjustment mechanism increases the longitudinal proportion of the wire that is disposed within the lumen by feeding the wire into the lumen.

14. The apparatus according to claim 13 , wherein the adjustment mechanism comprises a capstan.

15. The apparatus according to claim 13 , further comprising a guide tube, extending from the adjustment mechanism into the lumen, the actuation of the adjustment mechanism feeding the wire into the lumen by feeding the wire into the tube.