Internal pelvic fixator

Patent metadata

Field	Value
Publication number	US-11490930-B2
Application number	US-202016747288-A
Country	US
Kind code	B2
Filing date	Jan 20, 2020
Priority date	Jun 22, 2015
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A system and method for internal pelvic fixation. Guide wires can be inserted through guides and opposing sides of a pelvic bone, and can indicate a depth for driving bone screws into the pelvic bone. Offset rod tools positioned about each guide can assist in determining an offset distance between an implant rod and the pelvic bone. A template rod may be coupled to the offset rod tools and used to select a length for the implant rod. Clamps can be coupled to the bone screws, the clamps having multiple axes of rotation, the angular positions of the clamps being secured by the tightening of a single nut of each clamp. Joysticks used to tighten the nuts can be coupled to a reduction holder mechanism that can decrease at least an axial distance between the clamps, and thus pelvic bones, before locking of the clamps via tightening of the nuts.

First claim

The invention claimed is:

1. An internal pelvic fixation kit, comprising:
at least one template rod sized to extend at least between opposing sides of a pelvis bone of a patient, the at least one template rod being manually bendable during implantation to generally conform to the anatomy of the patient;
a first clamp and a second clamp, the first and second clamps structured for selective and lockable rotation about one or more axes, the first and second clamps each having a clamping bore, the clamping bore being selectively adjustable between an uncompressed state and a compressed state;
at least one implant rod, the clamping bore of the first and second clamps sized to receive insertion of an end of the at least one template rod and to exert a clamping force on the at least one template rod when the clamping bore is in the compressed state; and
at least one guide sized to be positioned adjacent to a portion of the pelvis bone, the at least one guide having indicia indicative of an offset position from placement of at least one of following away from the pelvis bone: a) the first clamp, b) the second clamp, c) the at least one template rod, and d) the at least one implant rod.

2. The kit of claim 1 , further comprising:
at least one guide wire, at least a portion of the at least one guide wire structured to pass through an inner region of the at least one guide; and
a driver structured to drive a bone screw into the pelvis bone, the driver including indicia indicative of the location of the offset position when the driver is engaged with the bone screw and the bone screw is operably engaged with the pelvis bone.

3. The kit of claim 2 , wherein an outer surface of the at least one guide wire includes a plurality of indicia corresponding to a depth the at least one guide wire is inserted into the pelvis bone.

4. The kit of claim 1 , further comprising a first rod offset tool and a second rod offset tool, each of the first and second rod offset tools having a channel sized to receive placement of at least a portion of the at least one template rod at opposing sides of the pelvis bone, the first and second offset tools structured to adjust the size of an offset between the at least one template rod and an adjacent outer surface of the pelvis bone.

5. The kit of claim 1 , wherein at least one end of the at least one template rod includes indicia that corresponds to a length of the at least one implant rod.

6. The kit of claim 1 , wherein the first clamp includes a first clamping segment and a second clamping segment, the first clamping segment structured to be rotatable about the first axis of a first bone screw when the first clamp is in an unlocked state, and be secured at an angular position relative to the first axis when the first clamp is in a locked state, the first clamping segment having a first segment bore that extends along the second axis, at least a portion of the second clamping segment extending into the first segment bore and being rotatable about the second axis, the clamping bore of the first clamp being positioned in a portion of the second clamping segment.

7. The kit of claim 1 , further comprising at least one joystick, the at least one joystick having a handle, a body portion, and an engagement member, the handle extending through at least a portion of the body portion and coupled to the engagement member, the engagement member being axially displaceable by axial displacement of the handle relative to the body portion, the engagement member further being rotatable by rotation of the handle, the engagement member being configured to be removably coupled to at least one of the first and second clamps in a manner that translates rotational movement of the engagement member to a nut of the first or second clamp.

8. The kit of claim 7 , wherein the at least one joystick further comprises an engagement member coupled to the body portion, the engagement member having a cavity positioned between a first end and a second end of the engagement member, at least a portion of the engagement body sized for axial and rotational displacement within the cavity, the second end of the engagement member having a recess sized to engage a screw that is coupled to one of the first and second clamps in a manner that prevents rotation of the screw as the engagement body is coupled to, and rotates, the nut of the first or second clamp.

9. The kit of claim 7 , further comprising a reduction holder mechanism having a strut mechanism, a first pivotal coupler, and a second pivotal coupler, the first and second pivotal couplers pivotally connected to opposing ends of the strut mechanism, the first and second pivotal couplers each having an opening sized to receive insertion of a portion of the at least one joystick, the strut mechanism structured to adjust an axial distance between at least the first and second pivotal couplers.

10. The kit of claim 9 , wherein the first and second pivotal couplers each include a lock mechanism, the lock mechanism being displaceable between a first position and a second position, the lock mechanism structured to retain the received portion of the at least one joystick when the lock mechanism is in the second position.

11. The kit of claim 9 , wherein the strut mechanism includes a lock device that is adjustable between a locked state and an unlocked state, the lock device structured to prevent adjustment of an axial length of at least the strut mechanism when the lock device is in the locked state.

Assignees

• Smith & Nephew Inc

Inventors

• Ritchey Nick
• Ferguson Joe
• Brownhill James

Classifications

• A61B17/68 Primary

  Internal fixation devices {, including fasteners and spinal fixators, even if a part thereof projects from the skin (bone staples A61B17/0642)} · CPC title

• A61B17/6433

  specially adapted for use on body parts other than limbs, e.g. trunk or head · CPC title

• A61B17/8863

  Apparatus for shaping or cutting osteosynthesis equipment by medical personnel · CPC title

• A61B17/6441

  Bilateral fixators, i.e. with both ends of pins or wires clamped · CPC title

• F16B2/12

  using sliding jaws · CPC title