Minimally invasive tool to facilitate implanting a pedicle screw and housing
View Patent ↗A minimally invasive tool to facilitate implanting a pedicle screw and housing is provided. The minimally invasive tool includes a first sleeve having flexible tabs that couple to a housing and a second sleeve slidably engaged in the first sleeve. The second sleeve provides reinforcing such that the first and second sleeve provide counter torque for driving the pedicle screw.
1. A method of attaching a tool to an implant to facilitate minimally invasive surgical procedures, the method comprising the steps of:
providing a tool comprising an inner sleeve having first and second elongate portions, each of the first and second elongate portions having a distal end and a proximal end, the inner sleeve having first and second slots extending between the first and second elongate portions from the distal ends thereof, the first and second slots each having a slot length greater than one half of a length of the first and second elongate portions;
an outer sleeve comprising third and fourth elongate portions, each of the third and fourth elongate portions having distal and proximal ends, the outer sleeve member further comprising third and fourth slots extending between the third and fourth elongate portions from the distal ends thereof, the third and fourth slots each having a length greater than one half the length of the third and fourth elongate portions, wherein the inner sleeve is sized to be received within the outer sleeve, a connector member adapted to couple the proximal ends of the first and second elongate portions with the proximal ends of the third and fourth elongate portions, respectively;
an alignment feature adapted to align the first slot with the third slot, and to align the second slot with the fourth slot, when the inner sleeve is received within the outer sleeve, wherein the alignment feature comprises at least one alignment channel located at the distal end of one of the first and second elongate portions, and at least one alignment projection located on a radial inner surface proximate the distal end of one of the third and fourth elongate portions and configured to selectively lock with the at least one alignment channel; and
an implant engagement feature disposed on a distal end of the third elongate member, the implant engagement feature adapted to releasably secure the second sleeve to the implant;
inserting the distal ends of the third and fourth elongate portions through an incision until the distal ends are proximate the implant;
coupling the distal ends of the third and fourth elongate portions to the implant using the implant engagement feature;
sliding the inner sleeve inside the outer sleeve such that the first and second elongate portions move along the third and fourth elongate portions until a first alignment portion disposed on the distal end of at least one of the first and second elongate portions engages a second alignment portion disposed on an uppermost edge of the implant; and
moving a part of the implant along the slot and between the first and second elongate portions until the part of the implant is implanted at a surgical site.
2. The method of claim 1 , wherein sliding the inner sleeve comprises locking the tool to the implant.
3. The method of claim 1 , wherein the implant engagement feature comprises a projection extending from the third elongate member distal end, wherein the step of coupling the third and fourth elongate members comprises rotating the outer sleeve until the projection engages the implant.
4. The method of claim 1 , wherein the step of moving a part of the implant along the slot comprises moving the part from the proximal end to the distal end.
5. The method of claim 1 , further comprising coupling the first and second elongate members with the third and fourth elongate members.
6. The method of claim 1 , wherein the first alignment portion includes one of a projection and a detent, and the second alignment portion includes the other of the projection and the detent, and wherein the step of sliding the inner sleeve includes mating the one of the projection and the detent with the other of the projection and the detent.
7. The method of claim 1 , wherein the implant includes a pedicle screw anchor, and wherein coupling the distal ends of the third and fourth elongate portions to the implant includes engaging the implant engagement feature with a radially outer surface of the pedicle screw anchor.
8. The method of claim 7 , wherein the implant engagement feature includes a protrusion and an alignment ridge, and the radially outer surface includes a detent and an alignment dimple, the alignment dimple disposed between the detent and the uppermost edge of the implant, the method further comprising:
mating the protrusion with the detent; and
mating the alignment ridge with the alignment dimple.