Patents by Inventor Mathew E. Mitchell
Mathew E. Mitchell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9370397Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: GrantFiled: July 2, 2013Date of Patent: June 21, 2016Assignee: Smith & Nephew, Inc.Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Mark Markel, Ryland B. Edwards, III
-
Publication number: 20140018787Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: ApplicationFiled: July 2, 2013Publication date: January 16, 2014Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Mark Markel, Ryland B. Edwards, III
-
Publication number: 20130096556Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: ApplicationFiled: December 5, 2012Publication date: April 18, 2013Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Patent number: 8377058Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: GrantFiled: May 27, 2011Date of Patent: February 19, 2013Assignee: Smith & Nephew, Inc.Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Mark Markel, Ryland B. Edwards, III
-
Patent number: 8348934Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: GrantFiled: September 23, 2011Date of Patent: January 8, 2013Assignee: Smith & Nephew, Inc.Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Publication number: 20120010613Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: ApplicationFiled: September 23, 2011Publication date: January 12, 2012Applicant: SMITH & NEPHEW, INC.Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Patent number: 8066700Abstract: An electrosurgical instrument includes a shaft, a flexible portion, and a head coupled to the shaft through the flexible portion and pivotably coupled to the flexible portion. The head includes a non-conductive surface and an electrically conductive surface. The flexible portion is configured to bias the non-conductive surface and the electrically conductive surface towards a tissue surface, such as cartilage. The non-conductive surface may include a material having a thermal conductivity less than or equal to about 30 W/m*K and/or a volume resistivity greater than or equal to about 1×1014 ohm*cm. The non-conductive surface may include a ceramic such as Macor® ceramic, ZTA ceramic, and/or 99.5% alumina ceramic.Type: GrantFiled: November 30, 2004Date of Patent: November 29, 2011Assignee: Smith & Nephew, Inc.Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Marie Meyer, Mark Markel, Yan Lu, Ryland B. Edwards, III
-
Patent number: 8052675Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: GrantFiled: January 21, 2010Date of Patent: November 8, 2011Assignee: Smith & Nephew, Inc.Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Publication number: 20110230879Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: ApplicationFiled: May 27, 2011Publication date: September 22, 2011Applicant: SMITH & NEPHEW, INC.Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Mark Markel, Ryland B. Edwards, III
-
Patent number: 7951142Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: GrantFiled: January 30, 2004Date of Patent: May 31, 2011Assignee: Smith & Nephew, Inc.Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell, Mark Markel, Ryland B. Edwards, III
-
Publication number: 20100121317Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: ApplicationFiled: January 21, 2010Publication date: May 13, 2010Applicant: SMITH & NEPHEW, INC.Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Patent number: 7655003Abstract: A method and apparatus include determining a value of a parameter associated with operation of an electrosurgical probe having a particular probe design, and determining whether the value of the parameter is within a range of values that has been predetermined for the particular probe design to indicate that the probe is treating tissue in a desired manner. Power is delivered to the probe according to an algorithm based upon a determination that the value of the parameter is outside the range of values The algorithm delivers power in a pulsed profile including portions of low power and portions of high power. In one embodiment, the tissue treatment is ablation, the parameter is impedance, and the method limits tissue necrosis to less than 200 microns. In another embodiment, the tissue treatment is shrinkage, the parameter is temperature, and the method limits power delivery when the probe is not shrinking tissue.Type: GrantFiled: June 22, 2005Date of Patent: February 2, 2010Assignee: Smith & Nephew, Inc.Inventors: Douglas M. Lorang, Mathew E. Mitchell, Karen Drucker, Kobi Iki
-
Patent number: 7510556Abstract: A bipolar electrosurgical instrument for clamping, grasping, manipulating, and sealing tissue includes first and second shafts each having a jaw member extending from a distal end thereof and a handle disposed at a proximal end thereof. The handle being operable to effect movement of the jaw members relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The bipolar instrument is connectable to a source of electrical energy having a first electrical potential connected to one of the jaw members and a second electrical potential connected to the other of the jaw members such that the jaw members are capable of selectively conducting energy through tissue held therebetween to effect a seal. Both the first and second electrical potentials are transmitted to the jaw members through the first shaft.Type: GrantFiled: November 24, 2004Date of Patent: March 31, 2009Assignee: Coviden AGInventors: Lap P. Nguyen, Steven P. Buysse, Dale F. Schmaltz, Stephen Wade Lukianow, Michael J. Lands, Jenifer S. Kennedy, Kate R. Lawes, Daniel L. Trimberger, Mathew E. Mitchell, Kristin D. Johnson, Gary M Couture, Philip M. Tetzlaff
-
Publication number: 20040254571Abstract: An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.Type: ApplicationFiled: January 30, 2004Publication date: December 16, 2004Inventors: Kobi Iki, William M. Ambrisco, Douglas M. Lorang, Alan P. Gannon, Richard M. Ranalli, Mathew E. Mitchell
-
Publication number: 20030014053Abstract: A bipolar electrosurgical instrument for clamping, grasping, manipulating, and sealing tissue includes first and second shafts each having a jaw member extending from a distal end thereof and a handle disposed at a proximal end thereof. The handle being operable to effect movement of the jaw members relative to one another from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween. The bipolar instrument is connectable to a source of electrical energy having a first electrical potential connected to one of the jaw members and a second electrical potential connected to the other of the jaw members such that the jaw members are capable of selectively conducting energy through tissue held therebetween to effect a seal. Both the first and second electrical potentials are transmitted to the jaw members through the first shaft.Type: ApplicationFiled: April 5, 2002Publication date: January 16, 2003Inventors: Lap P. Nguyen, Steven P. Buysse, Dale F. Schmaltz, Stephen Wade Lukianow, Michael J. Lands, Jenifer S. Kennedy, Kate R. Lawes, Daniel L. Trimberger, Mathew E. Mitchell, Kristin D. Johnson, Gary M. Couture, Philip M. Tetzlaff