Hand-held instruments that access interior body regions

• US 7,399,306 B2
• Filed: 05/08/2003
• Issued: 07/15/2008
• Est. Priority Date: 10/19/1999
• Status: Expired due to Fees

• Current Assignee: Orthophoenix, LLC (Marathon Patent Group, Inc.)
• Original Assignee: Kyphon Incorporated
• Inventors: Reiley, Mark A, Reo, Michael L, Scribner, Robert M, Ferdinand, Arthur E
• Primary Examiner(s): GIBSON, ROY DEAN
• Application Number:
  US10/431,681
• Publication Number:
  US 20030191414A1
• Time in Patent Office: 1,895 Days
• Field of Search: 606/167, 606/170, 600/562, 600564-567
• US Class Current: 606/185
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/34 Trocars; Puncturing needles pointed biopsy instruments A61B10/0233; devices for piercing the ear-lobes A44C7/001; seals or hemostasis valves A61M39/06
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 17/8816 characterised by the conduit, e.g. tube, along which fluid flows into the body or by conduit connections
• CPC Class Codes: A61B 17/8819 characterised by the introducer proximal part, e.g. cannula handle, or by parts which are inserted inside each other, e.g. stylet and cannula A61B17/8825 takes precedence
• CPC Class Codes: A61B 17/8822 characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum
• CPC Class Codes: A61B 17/885 Tools for expanding or compacting bones or discs or cavities therein A61B17/8805, A61B17/7097 take precedence
• CPC Class Codes: A61B 17/8855 inflatable, e.g. kyphoplasty balloons
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/00424 ergonomic, e.g. fitting in fist
• CPC Class Codes: A61B 2017/00429 with a roughened portion
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable
• CPC Class Codes: A61B 2090/0814 Preventing re-use

Abstract

Apparatus and methods provide a tool comprising a trocar and a cannula in which the trocar engages the cannula to form a composite instrument. The trocar includes a handle and a lumen through the trocar and the trocar handle that accommodates passage of a functional instrument, such as a stylet, guidewire, or spinal needle assembly. The cannula includes a handle and is sized and configured to accommodate passage of the trocar. The trocar handle mates with the cannula handle to form a composite handle when the trocar is engaged with the cannula.

Claims

1. A tool assembly comprising:

a guide instrument,

a trocar including a handle,

a lumen extending through the trocar and the trocar handle, the lumen accommodating passage of the guide instrument,

a cannula including a cannula handle and being sized and configured to accommodate passage of the trocar,

the trocar engaging the cannula to form a composite instrument sized and configured for passage over the guide instrument,

the trocar handle mating with the cannula handle to form a composite handle when the trocar is engaged with the cannula.

9. A tool assembly according to claim 1 or 6 or 7 or 8

wherein the composite handle is adapted, in use, to transit longitudinal force to the composite instrument.

10. A tool assembly according to claim 1 or 6 or 7 or 8

wherein the composite handle is adapted, in use, to transmit rotational force to the composite instrument.

11. A tool assembly according to claim 1 or 6 or 7 or 8

wherein the composite handle is adapted, in use, to transmit both longitudinal and rotational forces to the composite instrument.

12. A tool assembly according to claim 1 or 6 or 7 or 8

wherein the composite handle is adapted, in use, to receive a striking force.

13. A tool assembly according to claim 1 or 6 or 7 or 8

wherein the composite handle is constructed of material capable of resisting deformation when a striking force is applied.

17. A tool assembly according to claim 1

wherein the guide instrument comprises a stylet.

18. A tool assembly according to claim 1

wherein the guide instrument comprises a guidewire.

2. A method of manipulating an instrument that, in use, accesses bone comprising the steps of

providing a guide instrument,

inserting the guide instrument through soft tissue to a target bone treatment site,

providing a trocar including a first handle and having a lumen extending through the trocar and the handle accommodating passage of the guide instrument,

providing a cannula including a handle and being sized and configured to accommodate passage of the trocar, the trocar engaging the cannula to form a composite instrument and the trocar handle mating with the cannula handle to form a composite handle when the trocar engages the cannula,

passing the trocar through the cannula to engage the trocar with the cannula to form the composite instrument,

mating the trocar handle with the cannula handle to form the composite handle,

passing the composite instrument over the guide instrument,

manipulating the composite instrument over the guide instrument to the targeted bone treatment site.

3. A method according to claim 2 wherein the guide instrument comprises a styler.

4. A method according to claim 2 wherein the guide instrument comprises a guidewire.

5. A method according to claim 2 wherein the guide instrument comprises a spinal needle assembly.

6. A tool assembly comprising:

a spinal needle assembly,

a trocar including a handle,

a lumen extending through the trocar and the trocar handle, the lumen accommodating passage of the spinal needle assembly,

a cannula including a cannula handle and being sized and configured to accommodate passage of the trocar,

the trocar engaging the cannula to form a composite instrument sized and configured for passage over the spinal needle assembly,

the trocar handle mating with the cannula handle in form a composite handle when the trocar is engaged with the cannula.

7. A tool assembly comprising:

a trocar including a handle that includes a first distal finger gripping surface and a first proximal finger gripping surface,

a lumen extending through the trocar and the trocar handle, the lumen accommodating passage of a functional instrument,

a cannula including a cannula handle and being sized and configured to accommodate passage of the trocar, the cannula handle including a second distal finger gripping surface and a second proximal finger gripping surface,

the trocar engaging the cannula to form a composite instrument,

the trocar handle mating with the cannula handle to form a composite handle when the trocar is engaged with the cannula, the composite handle including the first distal gripping surface and the second distal gripping surface fitted together to form a composite finger gripping surface that includes the first distal gripping surface and the second distal gripping surface.

8. A tool assembly comprising:

an instrument,

a trocar including a handle,

a lumen extending through the trocar and the trocar handle, the lumen accommodating passage of the instrument,

a cannula including a cannula handle and being sized and configured to accommodate passage of the trocar, the cannula being shorter than the trocar,

the trocar engaging the cannula to form a composite instrument sized and configured for passage over the instrument,

the trocar handle mating with the cannula handle to form a composite handle when the trocar is engaged with the cannula.

14. A tool assembly according to claim 8

wherein the instrument comprises a stylet.

15. A tool assembly according to claim 8

wherein the instrument comprises a guidewire.

16. A tool assembly according to claim 8

wherein the instrument comprises a spinal needle assembly.