Source: https://patents.google.com/patent/US8628534B2/en
Timestamp: 2018-10-20 00:37:41
Document Index: 302110184

Matched Legal Cases: ['Application No. 2006210796', 'Application No. 2', 'Application No. 2', 'Application No. 06720112', 'Application No. 2007', 'Application No. 2007', 'Application No. 2007', 'Application No. 2007', 'Application No. 06720112']

US8628534B2 - Ultrasonic cutting device - Google Patents
US8628534B2
US8628534B2 US11050265 US5026505A US8628534B2 US 8628534 B2 US8628534 B2 US 8628534B2 US 11050265 US11050265 US 11050265 US 5026505 A US5026505 A US 5026505A US 8628534 B2 US8628534 B2 US 8628534B2
US20060195107A1 (en )
The present invention relates to U.S. patent application Ser. No. 11/050,158 entitled “Ultrasonic Cutting Device”, filed on Feb. 2, 2005.
The present invention can additionally perform lateral cutting operations. For example, using the present invention, a surgeon can laterally cut a region of bone from within a predefined hollow provided in the bone. For example, when used during spinal surgery, the present invention offers a surgeon the benefit of a compact ultrasonic device that can be readily guided down a predefined hollow pathway to a fixed depth. In one such surgical procedure, namely a stenosis correction procedure, the pedicles of a vertebrae are cut at corresponding points such that the pedicle can be separated from the main portion of the vertebral segment. Such a procedure is defined in U.S. patent application No. US 2003/0212400 to Bloemer, and U.S. Pat. No. 6,358,254 B1 to Anderson, both of which are herein incorporated by reference. In accordance with the Bloemer application and Anderson patent, a hollow pathway is provided in the pedicle region of a vertebra. This hollow pathway can be generated using existing drilling techniques. Following the drilling of a hollow pathway, a need exists to cut through the material of the pedicle region such that an expandable screw may be placed within the hollow pathway. The required cutting, if completed from within the predefined hollow region, must be lateral in nature. The present invention, and its lateral cutting aspects, allows for the predefined hollow in the bone to be used to properly orient the surgical instrument. This expandable screw, placed in the now severed pedicle, allows for the separation of the pedicle from the main portion of the vertebrae such that stenosis is eliminated.
1. A method for cutting the pedicle region of a vertebra during spinal surgery with an ultrasonic cutting tool, comprising:
locating an ultrasonic cutting tool into said pathway at a fixed distance, wherein said tool contains
an ultrasonic transducer element for producing an ultrasonic output;
a rotatable handpiece sized and oriented to contain the ultrasonic transducer;
a lateral cutting tip associated with the ultrasonic transducer element, wherein the lateral cutting tip oriented perpendicular to the ultrasonic transducer; and
a geared mechanism for rotating said lateral cutting mechanism in response to rotation of the rotatable handpiece relative to the ultrasonic cutting tool;
a convective cooling pathway associated with the lateral cutting tip;
rotating said lateral cutting tip in a circumferential manner about an eccentric axis of the ultrasonic cutting tool by rotating the rotatable handpiece to engage the geared mechanism to extend said lateral cutting tip from within said pathway to a predetermined position, the eccentric axis being a center of rotation of the lateral cutting tip and parallel to a longitudinal axis of the ultrasonic cutting tool; and
at the predetermined position, rotating said lateral cutting tip about the longitudinal axis of the ultrasonic cutting tool by rotating the rotatable handpiece and thus rotating the ultrasonic cutting tool with the lateral cutting tip extended to form a circumferential groove in the surrounding pedicle of the pathway, wherein heat generated by the lateral cutting tip is removed using the convective cooling pathway.
2. The method of claim 1, wherein said cutting tip is constructed of a biocompatible material.
3. The method of claim 1, wherein said ultrasonic cutting tool operates in the frequency range between about 22 Khz and about 45 Khz.
4. The method of claim 1, wherein said ultrasonic cutting tool operates in the amplitude range between about 50 to about 100 microns.
5. The method of claim 1, further comprising the providing of a guide tube, wherein said guide tube is sized and oriented to fit within the hollow pathway into the vertebrae.
6. The method of claim 5, further comprising the providing of an adjustable stop, wherein said adjustable stop is associated with the guide tube such that the distance that the guide tube is inserted into the hollow pathway is predefined.
7. A method of performing a surgical procedure comprising:
delivering a lateral cutting tip of an ultrasonic cutting tool to proximate a vertebra, wherein the lateral cutting tip is oriented perpendicular to the ultrasonic cutting tool;
cutting a portion of the vertebra with the lateral cutting tip of the ultrasonic cutting tool, the step of cutting comprising rotating the lateral cutting tip about an eccentric axis of the ultrasonic cutting tool by rotating a rotatable handpiece relative to the ultrasonic cutting tool to engage a geared mechanism in the ultrasonic cutting tool to extend said lateral cutting tip to a predetermined position, the eccentric axis being a center of rotation of the lateral cutting tip and parallel to a longitudinal axis of the ultrasonic cutting tool, and at the predetermined position, rotating said lateral cutting tip about the longitudinal axis of the ultrasonic cutting tool by rotating the rotatable handpiece and thus rotating the ultrasonic cutting tool with the lateral cutting tip extended to form a circumferential groove in the vertebrae; and
cooling the cutting tip to temperature sufficient to inhibit necrosis of tissue proximate the cutting tip using a convection cooling system coupled to the ultrasonic cutting tool.
8. The method of 7, wherein the cutting tip is cooled to a temperature less than approximately 50° C.
9. The method of 7, wherein the cutting tip is cooled to a temperature less than approximately 45° C.
10. The method of 7, wherein the cutting tip is cooled to a temperature less than approximately 40° C.
11. The method of 7, wherein the cutting tip is cooled to a temperature approximate to body temperature.
US20060195107A1 true US20060195107A1 (en) 2006-08-31
US8628534B2 true US8628534B2 (en) 2014-01-14
JPS62142544A (en) 1985-11-20 1987-06-25 Tomusuki Gosu Medeitsuinsuki I Low temperature ultrasonic knife
JP2004512855A (en) 1999-11-15 2004-04-30 ミソニクス　インコーポレイテッド Ultrasonic cutting blade comprises a cooling function
US20050119612A1 (en) 2002-04-02 2005-06-02 Alain Delval Tool holder for flexibly-deformable tool
JP2002510517A (en) 1998-04-06 2002-04-09 カイフォン インコーポレイテッド Structures and methods for making cavities in interior body regions
Australian Office Action for Application No. 2006210796, dated Sep. 13, 2010.
Canadian Office Action for Application No. 2,596,651, 2 pages, dated Aug. 17, 2012.
Canadian Office Action for Application No. 2,596,651, 3 pages, dated May 15, 2013.
European Communication for Application No. 06720112.9, dated Jul. 8, 2010.
European Office Action for Application No. EP06720112.9, dated Dec. 13, 2011.
International Search Report for Application No. PCT/US06/03616, dated Jun. 12, 2006.
Japanese Office Action Application No. 2007-554198, dated Apr. 19, 2011.
Japanese Office Action for Application No. 2007-554198, 5 pages, dated Feb. 14, 2012.
Japanese Office Action for Application No. 2007-554198, dated Oct. 4, 2011.
Japanese Written Interrogation for Application No. 2007-554198, 7 pages, dated Oct. 23, 2012.
Supplementary European Search Report for Application No. 06720112.9, dated Jan. 5, 2010.
US20060195107A1 (en) 2006-08-31 application