Heart valve repair using suture knots
A tissue anchor deployment device includes a needle having a slotted portion including a longitudinal slot that runs from a distal end of the needle and a suture having a first coil portion including a plurality of turns that wrap around a first portion of the slotted portion of the needle, a second coil portion including a plurality of turns that wrap around a second portion slotted portion of the needle that is proximal to the first portion of the slotted portion of the needle, and an internal coupling portion that runs within the first coil portion and the second coil portion and couples a distal end of the first coil portion to a proximal end of the second coil portion.
1. A tissue anchor deployment device comprising:
a needle having a slotted portion including a longitudinal slot that runs from a distal end of the needle; and
a suture comprising:
a first coil portion including a plurality of turns that wrap around a first portion of the slotted portion of the needle;
a second coil portion including a plurality of turns that wrap around a second portion of the slotted portion of the needle that is proximal to the first portion of the slotted portion of the needle;
an internal coupling portion that runs within the first coil portion and the second coil portion and couples a distal end of the first coil portion to a proximal end of the second coil portion;
a first tail portion coupled to a distal end of the second coil portion, wherein the first tail portion runs:
distally outside and over the first coil portion;
into the needle and proximally within the first coil portion; and
out of the needle between the first coil portion and the second coil portion; and
a second tail portion coupled to a proximal end of the first coil portion, wherein the second tail portion runs:
proximally outside and over the second coil portion;
into the needle and distally within the second coil portion; and
out of the needle between the first coil portion and the second coil portion.
2. The tissue anchor deployment device of claim 1 , wherein pulling on one or more of the first tail portion and the second tail portion causes one or more of the first coil portion and the second coil portion to form a loop.
3. The tissue anchor deployment device of claim 1 , wherein pulling on one or more of the first tail portion and the second tail portion causes the first coil portion and the second coil portion to form a bulky knot.
4. The tissue anchor deployment device of claim 1 , further comprising:
a tubular pusher device; and
a rigid delivery shaft;
wherein:
the pusher device is disposed at least partially within a lumen of the delivery shaft; and
the needle is disposed at least partially within a lumen of the pusher device.
5. The tissue anchor deployment device of claim 4 , wherein sliding of the pusher device distally within the delivery shaft causes the suture to slide off the distal end of the needle.
6. The tissue anchor deployment device of claim 1 , further comprising one or more silicon rings disposed around one or more of the first coil portion and the second coil portion.
7. The tissue anchor deployment device of claim 1 , further comprising a spacer disposed on the needle between the first coil portion and the second coil portion.
8. The tissue anchor deployment device of claim 1 , wherein the longitudinal slot spans a length of the needle covered by the first coil portion and the second coil portion.
9. The tissue anchor deployment device of claim 1 , further comprising a pusher tube, wherein:
the needle is slidingly disposed within the pusher tube; and
the pusher tube is configured to push the first coil portion and the second coil portion off of the distal end of the needle by distally advancing over the needle.
10. The tissue anchor deployment device of claim 9 , wherein the needle and the pusher tube are disposed at least partially within an elongate shaft of an instrument including a handle.
11. A tissue anchor deployment device comprising:
a needle having a slotted portion including a longitudinal slot that runs from a distal end of the needle; and
a suture comprising:
a first coil portion including a plurality of turns that wrap around a first portion of the slotted portion of the needle;
a second coil portion including a plurality of turns that wrap around a second portion of the slotted portion of the needle that is proximal to the first portion of the slotted portion of the needle;
a first suture tail extending from a proximal end of the first coil portion, passing into the needle and exiting the needle through the slotted portion of the needle in an area between the first coil portion and the second coil portion; and
a second suture tail extending from a distal end of the second coil portion, passing into the needle and exiting the needle through the slotted portion of the needle in the area between the first coil portion and the second coil portion.
12. The tissue anchor deployment device of claim 11 , wherein:
the first suture tail passes distally within the needle through the second coil portion before said exiting the needle through the slotted portion of the needle in the area between the first coil portion and the second coil portion; and
the second suture tail passes proximally within the needle through the first coil portion before said exiting the needle through the slotted portion of the needle in the area between the first coil portion and the second coil portion.
13. The tissue anchor deployment device of claim 11 , wherein the first coil portion and the second coil portion are separated by a gap.
14. The tissue anchor deployment device of claim 11 , wherein the longitudinal slot allows for the first coil portion and the second coil portion to slide distally off of the distal end of the needle.
15. The tissue anchor deployment device of claim 14 , wherein, when the first coil portion and the second coil portion have been slid off of the needle, pulling on at least one of the first suture tail or the second suture tail causes the first coil portion and the second coil portion to form loops.
16. The tissue anchor deployment device of claim 11 , further comprising:
a manipulable handle portion; and
an elongate member;
wherein the needle and the suture are disposed at least partially within the elongate member.
17. The tissue anchor deployment device of claim 16 , further comprising a pusher tube, wherein:
the needle is slidingly disposed within the pusher tube; and
the pusher tube is configured to push the first coil portion and the second coil portion off of the distal end of the needle by distally advancing over the needle.
18. A tissue anchor deployment device comprising:
a needle having a slotted portion including a longitudinal slot that runs from a distal end of the needle; and
a suture comprising:
a first coil portion including a plurality of turns that wrap around a first portion of the slotted portion of the needle;
a second coil portion including a plurality of turns that wrap around a second portion of the slotted portion of the needle that is proximal to the first portion of the slotted portion of the needle; and
an internal coupling portion that runs within the needle, within the first coil portion and the second coil portion, and couples a distal end of the first coil portion to a proximal end of the second coil portion.