Devices for creating voids in interior body regions and related methods

• US 20050240193A1
• Filed: 07/16/2004
• Published: 10/27/2005
• Est. Priority Date: 09/03/2003
• Status: Abandoned Application

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated
• Inventors: Scholten, Arie, Layne, Richard W., Reiley, Mark A., Edidin, Avram Allan, Cantu, Alberto Ruiz, Way, Bryce Anton, Rothwell, Derek S.
• Application Number:
  US10/893,155
• Publication Number:
  US 20050240193A1
• Time in Patent Office: Days
• US Class Current: 606/80
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/3207 Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions A61B17/32037 takes precedence; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61B 17/8805 for introducing fluid filler into bone or extracting it A61B17/7097, A61B17/8833 take precedence
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/00349 Needle-like instruments having hook or barb-like gripping means, e.g. for grasping suture or tissue A61B17/06066 takes precedence
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/320028 with reciprocating movements
• CPC Class Codes: A61B 2017/320044 Blunt dissectors blunt suture needles A61B2017/06085

Abstract

Several embodiments of cutting tips for tools for creating voids in interior body regions are provided. The cutting tips provide for rotational and translational cutting. An actuator mechanism for deploying a cutting tip converts the rotational movement of a wheel into translational movement of a plunger rod. The actuator mechanism provides positive cutting action as the cutting tip is moved from a first, non-deployed position to a second, deployed position and from the second, deployed position to the first, non-deployed position. Methods of creating a void in bone provide one or more mechanical cutting tools that may be used in combination with one or more expandable void-creating structures to form a void of a desired size and configuration.

Claims

1. A tool for creating a void in interior body regions comprising

a shaft,

a tip for contacting bone, and

a hinge member coupling the tip to the shaft, the tip becoming uncoupled if the torque applied exceeds a maximum hinge torque,

the shaft including a region of weakness proximal to the tip along which the shaft will break if the torque applied exceeds a maximum shaft torque, and

the maximum hinge torque being greater than the

maximum shaft torque.

2. A tool as in claim 1

wherein a scived portion of the shaft defines the region of weakness.

3. A tool as in claim 1

wherein the region of weakness is an angular groove.

4. A tool as in claim 3

wherein the angular groove is a turned angular cut of approximately 60°

.

5. A tool as in claim 1

wherein the shaft comprises a first material and a second material different than the first material, and

wherein the second material forms the region of weakness.

6. A tool as in claim 5

wherein the second material comprises a plastic material.

7. A tool for creating a void in interior body regions comprising

a shaft assembly including a lumen,

a tip for contacting bone coupled to the shaft, and

a rod slidable within the lumen, the rod being tethered to the tip.

8. A tool for creating a void in interior body regions comprising

a shaft including a lumen, and

a tip for contacting bone coupled to the shaft by a coupling element,

the tip being additionally tethered to the shaft such that the tip remains tethered to the shaft if the coupling element becomes inoperable.

9. A tool for creating a void in interior body regions comprising

a cannula,

a shaft having a handle and sized and configured for passage through the cannula, and

a projection on the shaft distal of the handle and extending radially from the shaft,

the projection restricting forward advancement of the shaft within the cannula.