Interspinous implant insertion instrument with staggered path implant deployment mechanism

Patent metadata

Field	Value
Publication number	US-10420591-B2
Application number	US-201715487087-A
Country	US
Kind code	B2
Filing date	Apr 13, 2017
Priority date	Apr 14, 2016
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

An insertion instrument for inserting an implant includes an elongated main body having a proximal handle and a distal portion that selectively couples to the implant. A plunger is slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion. A hex nut driver is concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant. The proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein. Advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant.

First claim

What is claimed is:

1. An insertion instrument for inserting an implant, the insertion instrument comprising:
an elongated main body having a proximal handle and a distal portion that selectively couples to the implant;
a plunger slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion; and
a hex nut driver concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant,
wherein the proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein and wherein advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant,
wherein the staggered path is a cut-out in the proximal handle that includes two parallel linear paths with a perpendicular transition wall therebetween.

2. The insertion instrument as recited in claim 1 , further comprising a plunger knob rotatably coupled to the plunger wherein rotation of the knob translates the plunger tab within the staggered path.

3. The insertion instrument as recited in claim 1 , wherein rotation of a plunger knob translates the plunger tab proximally and distally and wherein rotation of the handle transitions the plunger tab along the transition wall and between the two parallel linear paths.

4. The insertion instrument of claim 1 , wherein the distal portion of the main body includes at least two flexible arms configured to friction fit the implant to the insertion instrument.

5. The insertion instrument of claim 1 , wherein a tip of the distal portion of the main body matches an inner diameter of the implant thereby configured to control mounting, torqueing and retention of the implant with the main body.

6. An insertion instrument for inserting an implant, the insertion instrument comprising:
an elongated main body having a proximal handle and a distal portion that selectively couples to the implant;
a plunger slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion;
a hex nut driver concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant,
wherein the proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein and wherein advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant; and
a knob of the hex nut driver is rotatably coupled to a distal threaded portion of the handle through a distal end cap wherein the knob of the hex nut is configured to deploy the implant.

7. An insertion instrument for inserting an implant, the insertion instrument comprising:
an elongated main body having a proximal handle and a distal portion that selectively couples to the implant;
a plunger slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion;
a hex nut driver concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant,
wherein the proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein and wherein advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant; and
a plunger knob rotatably coupled to a proximal threaded portion of the handle through a proximal end cap wherein the plunger knob is configured to translate the plunger tab within the staggered path.

8. An insertion instrument for inserting an implant, the insertion instrument comprising:
an elongated main body having a proximal handle and a distal portion that selectively couples to the implant;
a plunger slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion;
a hex nut driver concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant,
wherein the proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein and wherein advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant; and
wherein the plunger tab, a plunger knob, and a knob of the hex nut driver include a black PVD coating configured to indicate portions of the insertion instrument that change position during operation.

9. An insertion instrument for inserting an implant, the insertion instrument comprising:
an elongated main body having a proximal handle and a distal portion that selectively couples to the implant;
a plunger slidably engaged in a central passage of the elongated main body configured to fix the implant to the elongated main body by selectively filling the central passage within the distal portion;
a hex nut driver concentrically located about the plunger and elongated main body to deploy an actuation plunger of the implant,
wherein the proximal handle portion of the main body includes a staggered path therethrough for accepting a tab of the plunger therein and wherein advancement and retraction of the plunger tab within the staggered path alternates the insertion instrument between an unlocked position configured to mount the implant on the distal portion of the elongated main body, a locked position configured to lock the implant on the distal portion, and a deployed position configured to secure the implant; and
a proximal end cap between a plunger knob and a proximal portion of the handle and a distal end cap between a distal portion of the handle and a knob of the hex nut driver.

10. The insertion instrument of claim 9 , wherein the proximal end cap includes at least one flexible tooth corresponding to a plurality of ratchet teeth of the handle, the at least one flexible tooth and plurality of ratchet teeth configured to auto-lock the plunger and plunger knob to the handle and prevent premature loosening.

11. The insertion instrument of claim 9 , wherein the distal end cap includes at least one flexible tooth corresponding to a plurality of ratchet teeth of the handle, the at least one flexible tooth and plurality of ratchet teeth configured to auto-lock the hex nut driver and the handle together and prevent premature loosening.

12. An insertion instrument for inserting an implant, the

Assignees

• Spinal Simplicity Llc

Inventors

• Snell Douglas
• Barnds Annaria
• Frock Adam

Classifications

• A61B17/7065 Primary

  Devices with changeable shape, e.g. collapsible or having retractable arms to aid implantation; Tools therefor · CPC title

• A61B2017/00862

  elastic or resilient · CPC title

• A61B17/7082

  for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws · CPC title

• A61F2/4611

  of spinal prostheses · CPC title

• A61F2002/4627

  with linear motion along or rotating motion about the instrument axis or the implantation direction, e.g. telescopic, along a guiding rod, screwing inside the instrument · CPC title