Patents by Inventor Steven Buysse

Steven Buysse 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).

  • Publication number: 20070255279
    Abstract: An electrode assembly for use in combination with an electrosurgical instrument having opposing end effectors and a handle for effecting movement of the end effectors relative to one another. The electrode assembly includes a housing having one portion which is removably engageable with the electrosurgical instrument and a pair of electrodes each having an electrically conductive sealing surface and an insulating substrate. The electrodes are removably engageable with the end effectors of the electrosurgical instrument such that the electrodes reside in opposing relation relative to one another. The dimensions of the insulating substrate are different from the dimensions of the electrically conductive sealing surface to reduce thermal spread to adjacent tissue structures.
    Type: Application
    Filed: May 7, 2007
    Publication date: November 1, 2007
    Inventors: Steven Buysse, Michael Moses, David Schechter, Kristin Johnson, Philip Tetzlaff, Carolyn Mihaichuk
  • Publication number: 20070213712
    Abstract: A bipolar electrosurgical instrument has opposable seal surfaces on its jaws for grasping and sealing vessels and vascular tissue. Inner and outer instrument members allow arcuate motion of the seal surfaces. An open lockbox provides a pivot with lateral support to maintain alignment of the lateral surfaces. Ratchets on the instrument members hold a constant closure force on the tissue during the seal process. A shank portion on each member is tuned to provide an appropriate spring force to hold the seal surfaces together. During surgery, the instrument can be used to grasp and clamp vascular tissue and apply bipolar electrosurgical current through the clamped tissue. In one embodiment, the seal surfaces are partially insulated to prevent a short circuit when the instrument jaws are closed together. In another embodiment, the seal surfaces are removably mounted on the jaws.
    Type: Application
    Filed: May 10, 2007
    Publication date: September 13, 2007
    Inventors: Steven Buysse, Dale Schmaltz, Gary Couture, Lap Nguyen, Kristin Johnson
  • Publication number: 20070038209
    Abstract: A closed-loop control system is disclosed for use with an electrosurgical generator that generates electrosurgical energy. The closed loop control system includes a user interface for allowing a user to select at least one pre-surgical parameter, such as the type of surgical instrument operatively connected to the generator, the type of tissue and the desired surgical effect. A sensor module is also included for continually sensing at least one of electrical and physical properties proximate a surgical site and generating at least one signal relating thereto. The system also includes a control module for continually receiving the at least one selected pre-surgical parameter from the user interface and each of the signals from the sensor module, and processing each of the signals in accordance with the at least one pre-surgical parameter using at least one of a microprocessor, computer algorithm and a mapping.
    Type: Application
    Filed: October 24, 2006
    Publication date: February 15, 2007
    Inventors: Steven Buysse, Bret Felton, David Heard, David Keppel, Ronald Podhajsky, Dale Schamltz, Robert Wham, Edward Meagher, Kate Lawes, David Schechter, Chelsea Shields, Philip Tetzlaff
  • Publication number: 20060178667
    Abstract: An electrosurgical system is provided that includes an electrosurgical generator; and an electrosurgical pencil selectively connectable to the electrosurgical generator. The electrosurgical pencil includes an elongated housing; at least one electrocautery end effector removably supportable within the housing and extending distally from the housing, the electrocautery end effector being connected to the electrosurgical generator; and at least one voltage divider network supported on the housing. The at least one voltage divider network is electrically connected to the electrosurgical generator and controls at least one of the intensity of electrosurgical energy being delivered to the electrosurgical pencil and the mode of electrosurgical energy being delivered to the electrosurgical pencil.
    Type: Application
    Filed: January 24, 2006
    Publication date: August 10, 2006
    Inventors: Joe Sartor, Robert Behnke, Steven Buysse, Chris Ehr
  • Publication number: 20060173452
    Abstract: A laparoscopic bipolar electrosurgical instrument (10) for sealing tissue includes a handle (14) having an elongated tube (13) affixed thereto. The tube includes first (15) and second (16) jaw members having electrically conductive sealing surfaces (39, 40) attached to a distal end (12) thereof which are movable from a first position for approximating tissue to a second position for grasping tissue therebetween. The handle (14) includes a fixed handle (50) and a handle (52) which is movable relative to the fixed handle to effect movement of the jaw members (15, 16) from the first position to the second position for grasping tissue. The jaw members connect to a source of electrosurgical energy such that the opposable sealing surfaces are capable of conducting electrosurgical energy through tissue held therebetween. A stop (33, 90, 95) is included for maintaining a minimum separation distance between opposing sealing surfaces (39, 40).
    Type: Application
    Filed: June 3, 2003
    Publication date: August 3, 2006
    Inventors: Steven Buysse, Kate Lawes, Dale Schmaltz, Michael Lands
  • Publication number: 20060167450
    Abstract: An electrosurgical instrument includes a housing having a shaft attached thereto which defines a longitudinal axis therethrough. The instrument also includes first and second opposing jaw members coupled to the shaft, the first jaw member having a conductive surface and being movable relative to the second jaw member and the second jaw member being fixed relative to the shaft having an electrode rotatable along the longitudinal axis. The rotatable electrode has a sealing surface and a cutting edge. At least one non-conductive stop member is disposed on at least one of the first and second jaw members which controls the distance between the electrically conductive surfaces when tissue is held therebetween. The jaw member are connected to an electrosurgical energy source such that the jaw members are capable of conducting energy through tissue held therebetween.
    Type: Application
    Filed: January 10, 2006
    Publication date: July 27, 2006
    Inventors: Kristin Johnson, Steven Buysse
  • Publication number: 20060079885
    Abstract: The present disclosure relates to systems, devices and methods for positioning and placing multiple electrodes in a target surgical site. An introducer is provided for facilitating the insertion of a cluster of electrodes into the body of a patient for tissue for performing tissue ablation. The introducer includes a body portion including a plurality of holes formed therein for selectively receiving a respective elongate shaft of the electrodes therethrough, wherein the holes of the introducer orient and space each electrode relative to one another, wherein the introducer includes a centrally disposed hole formed therein for receiving a guide needle therethrough.
    Type: Application
    Filed: September 29, 2005
    Publication date: April 13, 2006
    Inventors: Kyle Rick, David Heard, Steven Buysse
  • Publication number: 20060079887
    Abstract: A system and method for heat ablation of tissue in which energy is sequentially applied to at least two electrodes inserted into tissue. The system is comprised of a radiofrequency (RF) source for supplying RF energy, at least two electrodes configured to apply RF energy to tissue, at least one return electrode for returning the RF energy to the RF source, and a controller configured to sequentially apply the RF energy to each of the at least two electrodes. The sequential delivery of energy is determined by the measured current and voltage, the calculated impedance at each of the electrodes and the timing for each electrode. An internal load may be activated with the previously activated channel and remain on until the next channel is activated to avoid the generator from having an open circuit.
    Type: Application
    Filed: October 3, 2005
    Publication date: April 13, 2006
    Inventors: Steven Buysse, Gary Dobbins, Brandon Gay, David Heard, James McPherson
  • Publication number: 20050240179
    Abstract: A laparoscopic bipolar electrosurgical instrument for sealing tissue includes a handle having an elongated tube affixed thereto. The tube includes first and second jaw members having electrically conductive sealing surfaces attached to a distal end thereof which are movable from a first position for approximating tissue to a second position for grasping tissue therebetween. The handle includes a fixed handle and a handle which is movable relative to the fixed handle to effect movement of the jaw members from the first position to the second position for grasping tissue. The jaw members connect to a source of electrosurgical energy such that the opposable sealing surfaces are capable of conducting electrosurgical energy through tissue held therebetween. A stop is included for maintaining a minimum separation distance between opposing sealing surfaces. A ratchet is also included to maintain a closure force in the range of about 7 kg/cm2 to about 13 kg/cm2 between opposing sealing surfaces.
    Type: Application
    Filed: May 5, 2005
    Publication date: October 27, 2005
    Inventors: Steven Buysse, Kate Lawes, Dale Schmaltz, Michael Lands, S. Lukianow, Kristin Johnson, Gary Couture, Lap Nguyen
  • Publication number: 20050137592
    Abstract: 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: Application
    Filed: November 24, 2004
    Publication date: June 23, 2005
    Inventors: Lap Nguyen, Steven Buysse, Dale Schmaltz, Stephen Lukianow, Michael Lands, Jenifer Kennedy, Kate Lawes, Daniel Trimberger, Mathew Mitchell, Kristin Johnson, Gary Couture, Philip Tetzlaff
  • Publication number: 20050113823
    Abstract: An electrosurgical pencil is provided which includes an elongated housing, an electrocautery blade supported within the housing and extending distally from the housing. The electrocautery blade is connected to a source of electrosurgical energy. The pencil also includes at least one activation switch supported on the housing which is configured and adapted to complete a control loop extending from the source of electrosurgical energy. At least one voltage divider network is also supported on the housing and is electrically connected to the source of electrosurgical energy.
    Type: Application
    Filed: November 20, 2003
    Publication date: May 26, 2005
    Inventors: Arlan Reschke, Steven Buysse, David Heard, Joe Sartor, Dale Schmaltz, Ronald Podhajsky
  • Publication number: 20050101951
    Abstract: A method for electrosurgically sealing a tissue includes steps of: (A) applying a first pulse of RF energy to the tissue; and (B) applying at least one subsequent RF energy pulse to the tissue and keeping constant or varying RF energy parameters of individual pulses in accordance with at least one characteristic of an electrical transient that occurs during the individual RF energy pulses. The method terminates the generation of subsequent RF pulses upon a determination that the electrical transient has passed a predetermined limit.
    Type: Application
    Filed: December 27, 2004
    Publication date: May 12, 2005
    Inventors: Robert Wham, Steven Buysse, James Orszulak
  • Publication number: 20050101952
    Abstract: A forceps for clamping, grasping, manipulating, coagulating/desiccating and cutting tissue includes a shaft portion having a proximal end, a distal end and first and second jaw members pivotally attached to the distal end of the shaft by a pivot assembly. Each of the jaw members including an opposing inner facing surface having a plurality of wave forms disposed thereon for engaging tissue therebetween. The wave forms disposed on the inner facing surface of the second jaw member being complimentary to the wave forms on the inner facing surface of first jaw member. A handle portion having an actuating assembly is attached to the proximal end of the shaft for imparting movement of the first and second jaw members from a first open position wherein the jaw members are disposed in spaced relation relative to one another to a second clamping position wherein the jaw members cooperate to grasp tissue therebetween.
    Type: Application
    Filed: August 17, 2004
    Publication date: May 12, 2005
    Inventors: Michael Lands, Stephen Lukianow, Steven Buysse
  • Publication number: 20050021025
    Abstract: An electrode assembly for use in combination with an electrosurgical instrument having opposing end effectors and a handle for effecting movement of the end effectors relative to one another. The electrode assembly includes a housing having one portion which is removably engageable with the electrosurgical instrument and a pair of electrodes each having an electrically conductive sealing surface and an insulating substrate. The electrodes are removably engageable with the end effectors of the electrosurgical instrument such that the electrodes reside in opposing relation relative to one another. The dimensions of the insulating substrate are different from the dimensions of the electrically conductive sealing surface to reduce thermal spread to adjacent tissue structures.
    Type: Application
    Filed: April 6, 2001
    Publication date: January 27, 2005
    Inventors: Steven Buysse, Michael Moses, David Schechter, Kristin Johnson, Philip Tetzlaff, Carolyn Mihaichuk
  • Publication number: 20050004568
    Abstract: An electrosurgical instrument which includes opposing end effectors and a handle for effecting movement of the end effectors relative to one another. The instrument includes a housing and a pair of electrodes. Each electode preferably includes an electrically conductive surface (e.g., which can be dimensioned for sealing, clamping and/or cutting) and an insulating substrate which is dimensioned to be engageable with the end effectors such that the electrodes reside in opposing relation relative to one another. The dimensions of the insulating substrate are different from the dimensions of the electrically conductive surface to reduce thermal spread to adjacent tissue structures. The insulating substrate is made from a material having a Comparative Tracking Index of about 300 volts to about 600 volts to reduce the incidence of flashover.
    Type: Application
    Filed: April 6, 2001
    Publication date: January 6, 2005
    Inventors: Kate Lawes, Steven Buysse, Sean Dycus, Kristin Johnson, Michael Moses, David Schechter, Philip Tetzlaff, Carolyn Mihaichuk