Systems and methods for implant removal

• US 9,216,049 B2
• Filed: 11/15/2011
• Issued: 12/22/2015
• Est. Priority Date: 11/15/2010
• Status: Active Grant

• Current Assignee: Illuminoss Medical, Inc.
• Original Assignee: Illuminoss Medical, Inc.
• Inventors: Rabiner, Robert A., DiPoto, Gene P., Broussaeau, Jeffrey P., Shanahan, Augustus C., Wong, Chi Yin, O'Leary, Anthony T.
• Primary Examiner(s): HANNA, SAMUEL SALEEB
• Application Number:
  US13/297,097
• Publication Number:
  US 20120150190A1
• Time in Patent Office: 1,498 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/164 intramedullary
• CPC Class Codes: A61B 17/1697 specially adapted for wire insertion
• CPC Class Codes: A61B 17/1717 for applying intramedullary nails or pins
• CPC Class Codes: A61B 17/7275 with expanding cylindrical parts
• CPC Class Codes: A61B 17/864 hollow, e.g. with socket or cannulated
• CPC Class Codes: A61B 17/8872 Instruments for putting said fixation devices against or away from the bone A61B17/7074, A61B17/808 take precedence
• CPC Class Codes: A61B 17/8875 Screwdrivers, spanners or wrenches
• CPC Class Codes: A61B 17/8897 Guide wires or guide pins
• CPC Class Codes: A61B 17/92 Impactors or extractors, e.g. for removing intramedullary devices insertion or extraction of artificial joints A61F2/4603
• CPC Class Codes: A61B 17/921 for intramedullary devices
• CPC Class Codes: A61B 2017/00407 Ratchet means
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/005 hardenable using external energy source, e.g. laser, ultrasound
• CPC Class Codes: A61B 2017/00836 corrosion-resistant A61B2017/00853 takes precedence; preventing galvanic or electrolytic corrosion in prostheses A61F2210/0009
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/1602 Mills
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis

Abstract

Implant removal systems and methods for using the system for removing an implant from a bone are disclosed herein. In an embodiment, a method for removing an intramedullary implant from a bone includes navigating a guidewire into an intramedullary cavity of the bone; inserting the guidewire into a lumen of an intramedullary implant located in the intramedullary cavity of the bone; advancing a removal screw over the guidewire to the intramedullary implant; threading the removal screw into the lumen of the intramedullary implant to engage the removal screw to the intramedullary implant; and applying impaction force on the removal screw to remove the intramedullary implant from the intramedullary cavity.

Claims

1. A method for removing an existing hardened intramedullary implant from a bone comprising:

identifying a location of the existing hardened intramedullary implant located in an intramedullary cavity of the bone, wherein the existing hardened intramedullary implant comprises a light sensitive liquid in a hardened state contained within a polymeric balloon,

the light sensitive liquid changes in state from a flowable state to the hardened state upon exposure to light from a light source, and

wherein the polymeric balloon contacts the bone in the intramedullary cavity to form a frictional engagement between the polymeric balloon and the bone;

subsequent to the identifying the location of the existing hardened intramedullary implant, threading a flexible guidewire having threads at a distal end into the existing hardened intramedullary implant located in the intramedullary cavity of the bone;

wherein threading the flexible guidewire into the existing hardened intramedullary implant comprises engaging the threads of the flexible guidewire into the existing hardened intramedullary implant; and

applying impaction force on the flexible guidewire to remove the existing hardened intramedullary implant from the intramedullary cavity,

wherein the engagement between the threads of the flexible guidewire and the existing hardened intramedullary implant create a pullout interface between the threads of the flexible guidewire and the existing hardened intramedullary implant to withstand forces that exceed a resistance force on the existing hardened intramedullary implant due to friction between the balloon and the bone in the intramedullary cavity, to pullout the existing hardened intramedullary implant from the intramedullary cavity of the bone without stripping of the existing hardened intramedullary implant.

2. The method of claim 1, wherein threading the flexible guidewire into the existing hardened intramedullary implant comprises inserting the flexible guidewire into a pre-existing lumen in the intramedullary implant such that the guidewire passes substantially along a centerline of the intramedullary implant.

3. The method of claim 1, wherein threading the flexible guidewire into the existing hardened intramedullary implant comprises inserting the flexible guidewire into a drilled lumen in the intramedullary implant such that the guidewire passes substantially along a centerline of the intramedullary implant.

4. The method of claim 1, wherein the impaction force is applied multiple times to remove the existing hardened intramedullary implant from the bone.

5. The method of claim 1, wherein the impaction force is applied on the flexible guidewire by a slaphammer.

6. The method of claim 1, wherein the flexible guidewire is inserted into the existing hardened intramedullary implant substantially along a centerline extending in a longitudinal direction of the existing hardened intramedullary implant.

8. The method of claim 6, wherein the existing hardened intramedullary implant is removed from the bone incrementally by impacting the guidewire multiple times.

7. A method for removing an existing hardened intramedullary implant from a bone comprising:

identifying a location of the existing hardened intramedullary implant located in an intramedullary cavity of the bone, wherein the existing hardened intramedullary implant is formed by introducing a light-sensitive liquid in a flowable state into a polymeric balloon to expand the polymeric balloon from a deflated state to an inflated state inside the intramedullary cavity and exposing the light-sensitive liquid to light from a light source to change the light sensitive liquid to a hardened state within the polymeric balloon, and

wherein the polymeric balloon contacts the bone in the intramedullary cavity to form a frictional engagement between the polymeric balloon and the bone;

subsequent to the identifying the location of the existing hardened intramedullary implant, threading a threaded tip of a flexible guidewire into the existing hardened intramedullary implant located in the intramedullary cavity of the bone,

wherein threading the flexible guidewire into the existing hardened intramedullary implant comprises engaging the threads of the threaded tip of the flexible guidewire into the existing hardened intramedullary implant; and

impacting the flexible guidewire with a slaphammer to remove the existing hardened intramedullary implant from the intramedullary cavity of the bone,

wherein the engagement between the threads of the flexible guidewire and the existing hardened intramedullary implant create a pullout interface between the threads of the flexible guidewire and the existing hardened intramedullary implant to withstand forces that exceed a resistance force on the existing hardened intramedullary implant due to friction between the balloon and the bone in the intramedullary cavity, to pullout the existing hardened intramedullary implant from the intramedullary cavity of the bone without stripping of the existing hardened intramedullary implant.

9. The method of claim 7, wherein the flexible guidewire is inserted into the existing hardened intramedullary implant substantially along a centerline extending in a longitudinal direction of the existing hardened intramedullary implant.