Douglas S Wahnschaffe

6929641, Aug 16, 2005

Mar 5, 2003

10/378657

Coliin C. O. Goble - Surrey, GB
Scott T. Latterell - Minneapolis MN, US
Douglas S. Wahnschaffe - Otsego MN, US

Gyrus Medical Limited - Cardiff

A61B018/14

606 37, 606 42, 606 48, 606 51

An electrosurgical system includes a generator for generating radio frequency (RF) power, and an electrosurgical instrument including at least three electrodes. The generator comprises an RF output stage having at least a pair of RF output lines, a power supply coupled to the output stage for supplying power to the output stage, and a controller capable of varying the RF power signal supplied to the output lines. The system also includes a selection circuit having at least three output connections each in electrical connection with a respective one of the at least three electrodes. This selection circuit operates to vary the coupling between the RF output stage and the three or more output connections. A switching device operable by the user causes the selection circuit to vary the electrode or electrodes to which RF power is supplied, and also causes the RF power signal supplied to at least one of the at least three output connections to vary depending on the electrode or electrodes to which RF power is supplied. In one arrangement of the selection circuit, one of the electrodes has no direct connection to the output stage of the generator and is connected via a capacitor to another of the electrodes.

6984231, Jan 10, 2006

Aug 27, 2002

10/228284

Coliin C. O. Goble - Surrey, GB
Scott T. Latterell - Minneapolis MN, US
Douglas S. Wahnschaffe - Otsego MN, US

Gyrus Medical Limited - Cardiff

A61B 18/14

606 37, 606 42, 606 48, 606 51

An electrosurgical system includes a generator () for generating radio frequency power, and an electrosurgical instrument () including at least three electrodes. The generator comprises a radio frequency output stage having at least a pair of output lines (C), and a power supply () coupled to the output stage for supplying power to the output stage. The generator also includes a controller () capable of varying a radio frequency signal supplied to the output lines, and a switching circuit () having three or more output connections (A, B, C) each electrically connected with a respective one of the at least three electrodes. This switching circuit is operable to vary the connections between the output lines (C) and the output connections (A, B, C). A switching device (A, B) forming part of the system is operable by the user to send a signal to the switching circuit () within the generator in order to vary the electrode or electrodes to which radio frequency power is supplied, the switching device also causing a signal to be sent to the controller () such that the radio frequency signal supplied to at least one of the three or more output connections varies depending on the electrode or electrodes to which radio frequency power is supplied. In one arrangement of the switching circuit, one of the electrodes has no direct connection to the output stage of the generator and is connected via a capacitor to another of the electrodes.

7033356, Apr 25, 2006

Sep 8, 2003

10/657378

Scott T. Latterell - Minneapolis MN, US
Douglas S. Wahnschaffe - Otsego MN, US

Gyrus Medical, Inc. - Maple Grove MN

A61B 18/14

606 48, 606 51, 606 52

Electrosurgical forceps are described that have jaws capable of being closed relative to one another, the jaws each supporting electrode structures especially shaped to enhance the ability of the instrument to desiccate/seal or cut tissue structures clamped between the opposed jaws. One of the opposed jaws has a generally arcuate cross-section with a raised central zone and the other electrode has a recess adapted to accommodate the raised central zone of the cooperating electrode. By appropriating the shaping the mating electrode surfaces, tissue structures placed between the jaws are stretched laterally as clamping occurs. The stretching action prevents bunching of the tissue and results in improved desiccation, sealing and cutting. A fine, uninsulated conductor disposed on the one jaw, but insulated from the electrode surface on that jaw, serves as a cutting electrode.

7204835, Apr 17, 2007

Feb 2, 2004

10/770133

Scott T. Latterell - Minneapolis MN, US
Douglas S. Wahnschaffe - Otsego MN, US
Scott R. Sanders - Longmont CO, US
Nigel Mark Goble - Stype, GB
Colin Charles Owen Goble - Englefield Green Egham, GB

Gyrus Medical, Inc. - Maple Grove MN

A61B 18/14

606 48, 606 45, 606 50, 606 51, 606 52

A bipolar electrosurgical instrument comprises a handle (), a body () joined to the handle, and a jaw assembly () joined to the body and arranged such that manipulation of the handle allows the opposed jaws of the jaw assembly to be opened and closed with respect to one another. A first of said opposed jaws () has at least a first coagulating electrode, and the other of said opposed jaws () has at least a second coagulating electrode and a cutting electrode () separated from the second coagulating electrode by an insulating member (). The instrument is manipulated at the surgical site such that the jaws of the jaw assembly () are open with respect to one another, with the cutting electrode () and at least one of the first and second coagulating electrodes contacting tissue at the surgical site. A radio frequency electrosurgical signal is supplied between the cutting electrode and the at least one coagulating electrode, and the electrosurgical instrument is moved while maintaining the jaws () in their open position so as to cut tissue at the surgical site.

20030040744, Feb 27, 2003

Aug 21, 2002

10/225321

Scott Latterell - Minneapolis MN, US
Douglas Wahnschaffe - Otsego MN, US

Gyrus Medical, Inc. - Maple Grove MN

A61B018/14

606/048000, 606/050000

A bipolar electrosurgical hook probe includes an end effector that includes first and second electrodes placed in parallel, closely-spaced relationship, each being of a relatively large surface area and a conductive reciprocally movable hook member that is movable into and out of a space between the first and second electrodes. A switch mechanism is provided by which an RF current can alternatively be made to flow between the first and second electrodes during electrocoagulation and from the hook electrode to each of the first and second electrodes when the instrument is operating in its cut mode.

20040006340, Jan 8, 2004

Jul 2, 2002

10/188207

Scott Latterell - Minneapolis MN, US
Douglas Wahnschaffe - Otsego MN, US

Gyrus Medical, Inc. - Maple Grove MN

A61B018/18

606/048000

Electrosurgical forceps are described that have jaws capable of being closed relative to one another, the jaws each supporting electrode structures especially shaped to enhance the ability of the instrument to desiccate/seal or cut tissue structures clamped between the opposed jaws. One of the opposed jaws has a generally arcuate cross-section with a raised central zone and the other electrode has a recess adapted to accommodate the raised central zone of the cooperating electrode. By appropriating the shaping the mating electrode surfaces, tissue structures placed between the jaws are stretched laterally as clamping occurs. The stretching action prevents bunching of the tissue and results in improved desiccation, sealing and cutting. A fine, uninsulated conductor disposed on the one jaw, but insulated from the electrode surface on that jaw, serves as a cutting electrode.

20060271042, Nov 30, 2006

May 26, 2005

11/138960

Scott Latterell - Minneapolis MN, US
Douglas Wahnschaffe - Otsego MN, US
Scott Sanders - Longmont CO, US
Nigel Goble - Berkshire, GB
Colin Goble - South Oxfordshire, GB
Gary Whipple - Attleboro MA, US
A. Boccuti - Arlington VA, US
Edward Danis - Uxbridge MA, US
John Robertson - Brooklyn CT, US

Gyrus Medical, Inc. - Maple Grove MN

A61B 18/14

606051000, 606052000

A bipolar electrosurgical forceps comprises an elongated tubular barrel having a proximal end, a distal end and a lumen extending between these two ends. A handle is provided at the proximal end of the barrel and includes an actuating member for opening and closing a pair of forceps jaws that are mounted at the distal end of the barrel. The forceps jaws include cam slots in a proximal head portion thereof. A coupling member extends between the actuating member on the handle and the pair of forceps jaws. The coupling member includes drive pins that cooperate with the cam slots whereby squeezing of the actuating mechanism first effects pivotal rotation of the pair of forceps jaws over a first range of motion of the actuating member and translation without rotation of the forceps jaws over a second range of motion of the actuating member.

20070299439, Dec 27, 2007

Mar 26, 2007

11/706121

Scott Latterell - Minneapolis MN, US
Douglas Wahnschaffe - Otsego MN, US
Scott Sanders - Longmont CO, US
Nigel Goble - Berkshire, GB
Colin Owen - Surrey, GB

Gyrus Medical, Inc. - Maple Grove MN

A61B 18/14

606048000, 606045000, 606050000, 606051000, 606052000

A bipolar electrosurgical instrument comprises a handle (), a body () joined to the handle, and a jaw assembly () joined to the body and arranged such that manipulation of the handle allows the opposed jaws of the jaw assembly to be opened and closed with respect to one another. A first of said opposed jaws () has at least a first coagulating electrode, and the other of said opposed jaws () has at least a second coagulating electrode and a cutting electrode () separated from the second coagulating electrode by an insulating member (). The instrument is manipulated at the surgical site such that the jaws of the jaw assembly () are open with respect to one another, with the cutting electrode () and at least one of the first and second coagulating electrodes contacting tissue at the surgical site. A radio frequency electrosurgical signal is supplied between the cutting electrode and the at least one coagulating electrode, and the electrosurgical instrument is moved while maintaining the jaws () in their open position so as to cut tissue at the surgical site.