Apparatus and methods for separating internal bone fixation device from introducer

• US 8,777,950 B2
• Filed: 12/31/2008
• Issued: 07/15/2014
• Est. Priority Date: 01/04/2008
• Status: Active Grant

• Current Assignee: Illuminoss Medical, Inc.
• Original Assignee: Illuminoss Medical, Inc.
• Inventors: Colleran, Dennis P., Rabiner, Robert A., Dye, Justin G., Chang, Narissa Y., Morin, Joshua M.
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): Prone, Christopher D
• Application Number:
  US12/347,405
• Publication Number:
  US 20090177204A1
• Time in Patent Office: 2,022 Days
• Field of Search: 606/79, 606/167, 606/172, 606/182, 606/205, 606/86.A, 606/90, 606/99, 606/104, 606/106, 606/108, 606/110, 606/53, 606/60, 623/1.11
• US Class Current: 606/86.A
• CPC Class Codes: A61B 17/7097 Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants disc prostheses made of inflatable chambers or pockets filled with fluid A61F2/441; replacing the nucleus pulposus A61F2002/444
• CPC Class Codes: A61B 17/7275 with expanding cylindrical parts
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel
• CPC Class Codes: A61B 2017/2905 flexible

Abstract

Apparatus and methods for separating an internal bone fixation device from an introducer are disclosed herein. A device for separating an internal bone fixation device from an introducer includes a functional portion having an outer shaft surrounding and controlling operation of a cutting mechanism; and a control portion having an actuating mechanism for initiating activation of the outer shaft.

Claims

1. A device for separating an internal bone fixation device from an introducer in a medullary space of a fractured bone, the device comprising:

a functional portion having an outer shaft surrounding and controlling operation of a cutting mechanism,

wherein the cutting mechanism has a contoured curved top surface for receiving the outer shaft and a contoured open bottom surface for positioning over the internal bone fixation device during a procedure for repairing a fractured bone,

wherein the cutting mechanism includes a base section diverging into at least two arm sections, a distal end of the at least two arm sections having an inner radial surface composed of a semi-spherically shaped sharp cutting blade, and

wherein the at least two arm sections surround a separation area of the introducer, the separation area located between a proximal end of the internal bone fixation device and a distal end of the introducer; and

a control portion having an actuating mechanism for initiating activation of the outer shaft.

2. The device of claim 1 wherein the outer shaft surrounds a portion of the cutting mechanism.

3. The device of claim 1 wherein the outer shaft includes an opening in a sidewall for engaging the cutting mechanism.

4. The device of claim 1 wherein a distal end of the control portion engages the outer shaft of the functional portion.

5. The device of claim 1 wherein activation of the actuating mechanism translates the outer shaft distally along the cutting mechanism, thereby pushing the cutting mechanism inwards to separate the internal bone fixation device from the introducer.

6. A device for separating an internal bone fixation device from a delivery catheter in a medullary space of a fractured bone, the device comprising:

a functional portion having an outer shaft and a cutting mechanism at least partially surrounded by the outer shaft,

wherein the cutting mechanism has a contoured curved top surface for receiving the outer shaft and a contoured open bottom surface for positioning over the internal bone fixation device during a procedure for repairing a fractured bone, and

wherein the cutting mechanism comprises a base section diverging into at least two arm sections and includes a channel therein for receiving the delivery catheter such that the at least two arm sections surround the delivery catheter received in the cutting mechanism, and

wherein a distal end of the at least two arm sections has an inner radial surface composed of a semi-spherically shaped sharp cutting blade which is compressible inward by a translation of the outer shaft in a distal direction along the cutting mechanism into the delivery catheter received within the cutting element; and

an actuating mechanism for translating the outer shaft relative to the cutting mechanism.

7. The device of claim 6 wherein the cutting mechanism includes an open surface for receiving the delivery catheter into the cutting mechanism.

8. The device of claim 6 wherein the cutting mechanism comprises a contoured distal portion such that the distal portion of the cutting mechanism engages the outer shaft as the outer shaft moves distally along the cutting mechanism to compress the at least two arm sections inward.

9. The device of claim 6 wherein a distal portion of the cutting mechanism has a greater outer diameter than a proximal portion of the cutting mechanism such that the distal portion of the cutting mechanism engages the outer shaft as the outer shaft moves distally along the cutting mechanism to compress the at least two arm sections inward.

10. A device for separating an internal bone fixation device from an introducer in a medullary space of a fractured bone, the device comprising:

a functional portion having an outer shaft surrounding and controlling operation of a cutting mechanism,

wherein the cutting mechanism has a contoured curved top surface for receiving the outer shaft and a contoured open bottom surface for positioning over the internal bone fixation device during a procedure for repairing a fractured bone, and

wherein the cutting mechanism includes a base section diverging into at least two arm sections, a distal end of the at least two arm sections having an inner radial surface composed of a sharp cutting blade; and

a control portion having an actuating mechanism for initiating activation of the outer shaft.

11. The device of claim 10 wherein the outer shaft surrounds a portion of the cutting mechanism.

12. The device of claim 10 wherein the outer shaft includes an opening in a sidewall for engaging the cutting mechanism.

13. The device of claim 10 wherein a distal end of the control portion engages the outer shaft of the functional portion.

14. The device of claim 10 wherein activation of the actuating mechanism translates the outer shaft distally along the cutting mechanism, thereby pushing the cutting mechanism inwards to separate the internal bone fixation device from the introducer.