System for use in treatment of vertebral fractures

• US 9,610,117 B2
• Filed: 04/29/2011
• Issued: 04/04/2017
• Est. Priority Date: 04/29/2010
• Status: Active Grant

• Current Assignee: Dfine Incorporated (Merit Medical Systems, Inc.)
• Original Assignee: Dfine Incorporated (Merit Medical Systems, Inc.)
• Inventors: Germain, Aaron
• Primary Examiner(s): BATES, DAVID W
• Application Number:
  US13/097,998
• Publication Number:
  US 20110295261A1
• Time in Patent Office: 2,167 Days
• Field of Search: 606 84, 606 41, 606 50
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1642 for producing a curved bore
• CPC Class Codes: A61B 17/1644 using fluid other than turbine drive fluid
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/8811 characterised by the introducer tip, i.e. the part inserted into or onto the bone
• 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 18/1477 Needle-like probes
• CPC Class Codes: A61B 18/148 having a short, rigid shaft for accessing the inner body transcutaneously, e.g. for neurosurgery or arthroscopy
• CPC Class Codes: A61B 18/1487 Trocar-like, i.e. devices producing an enlarged transcutaneous opening
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00196 reciprocating lengthwise
• CPC Class Codes: A61B 2018/0044 Spinal cord
• CPC Class Codes: A61B 2018/00565 Bone
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00642 with feedback, i.e. closed loop control
• CPC Class Codes: A61B 2018/00702 Power or energy
• CPC Class Codes: A61B 2018/00821 measured by a thermocouple
• CPC Class Codes: A61B 2018/0091 Handpieces of the surgical instrument or device
• CPC Class Codes: A61B 2018/1435 Spiral
• CPC Class Codes: A61B 2018/1861 : with an instrument inserted into a body lumen or cavity, e.g. a catheter
• CPC Class Codes: A61B 2218/002 : Irrigation
• CPC Class Codes: A61B 2218/007 : Aspiration

Abstract

Methods and devices that displace bone or other hard tissue to create a cavity in the tissue. Where such methods and devices rely on a driving mechanism for providing moving of the device to form a profile that improves displacement of the tissue. These methods and devices also allow for creating a path or cavity in bone for insertion of bone cement or other filler to treat a fracture or other condition in the bone. The features relating to the methods and devices described herein can be applied in any region of bone or hard tissue where the tissue or bone is displaced to define a bore or cavity instead of being extracted from the body such as during a drilling or ablation procedure.

Claims

1. A medical osteotome device comprising:

a handle having a connector for electrically coupling the osteotome device to a power supply;

a shaft extending from the handle to a working end, wherein a first electrode is electrically coupled to a first pole of the power supply and attached to an exterior of the shaft; and

an extendable element extendable from the shaft, wherein the extendable element comprises a second electrode separated from the first electrode by a bendable segment of the shaft comprising notches;

wherein the second electrode is electrically coupled to a second pole of the power supply, such that when activated, current flows between the first electrode and the second electrode.

2. The medical device of claim 1, wherein the second electrode includes a helical electrode.

3. The medical device of claim 1, further comprising an actuation portion comprising a moveable portion of the handle that is configured to deform the working end into an articulated configuration.

4. The medical device of claim 1, wherein the handle is configured to receive an impact force to cause the working end to penetrate bone.

5. The medical device of claim 1, further comprising a lumen extending through the shaft and working end.

6. The medical device of claim 1, wherein the extendable element has a total length of electrode edges of greater than 50 mm.

7. A medical device for ablating tissue, comprising:

an elongated probe having a handle end with a connector, the elongated probe having a working end, wherein the elongated probe comprises a first electrode;

wherein the working end comprises a straight configuration and a curved configuration and wherein the straight configuration and curved configuration are limited to a single plane;

an extendable helical element comprising a second electrode carried by the working end, wherein the extendable helical element has a plurality of helical turns and is moveable from an axially non-extended position to an axially extended position that increases a space between adjacent helical turns to provide an increased electrode surface area;

wherein the second electrode is separated from the first electrode by an insulator; and

a tip located at a distal end of the working end and being configured to penetrate and advance through tissue upon the application of an impact force at the handle.

8. The medical device of claim 7, wherein the extendable helical element is formed form a flat wire.

9. The medical device of claim 7, wherein the extendable helical element is formed form a rectangular wire.

10. The medical device of claim 7, wherein the extendable helical element has a non-extended length of less than 5 mm.

11. The medical device of claim 7, wherein the extendable helical element has an extended length of greater than 6 mm.

12. The medical device of claim 7, wherein the handle carries an actuation mechanism configured to articulate the working end between the straight configuration and the curved configuration.

13. The medical device of claim 7, where the handle is configured to receive an impact force to cause the working end to penetrate bone.

14. A medical device for treating tissue, comprising:

a handle having a shaft with a tip affixed thereto;

the handle having an actuating portion and being configured to receive an impact force applied thereto and transfer the impact force to the shaft;

a connector coupled to the handle;

the shaft having an articulating portion moveable between a straight configuration and a curved configuration upon actuation of the actuating portion where the straight configuration and curved configuration are limited to a single plane, the shaft being configured to transfer the impact force to the tip;

a first electrode attached to an exterior of the shaft;

the tip being configured to penetrate and advance through hard tissue upon the application of the impact force, where a first side of the tip is longer than a second side of the tip, where the first side of the tip is on an inner side of the curved configuration causing the tip to move towards the articulated configuration when advanced through tissue; and

wherein the tip further comprises a second electrode and wherein the second electrode is separated from the first electrode by the articulating portion.

15. The medical device of claim 14, further comprising at least a first temperature sensing element on the shaft.

16. The medical device of claim 15, further comprising at least a second temperature sensing element proximally spaced along the shaft from the first temperature sensing element.