A control circuit of a surgical device is disclosed. The control circuit includes a first circuit portion coupled to at least one switch operable between an open state and a closed state. The first circuit portion communicates with a surgical generator over a conductor pair to receive a control signal to determine a state of the at least one switch.

Surgical generator for ultrasonic and electrosurgical devices

In an endoscope therapeutic device having a plurality of introduction guide tubes for introducing a treatment tool into a body cavity, the introduction guide tubes are mutually joined at a position more proximal than bending portions thereof. Accordingly, the effects caused by the movement of the plurality of the introduction guide tubes are mutually invalidated at a joint portion as a fulcrum, so that the position of the introduction guide tube is relatively stabilized in the body cavity. As joining methods, there are integration, usage of a joint tool, and usage of an over tube. The operability is improved when the introduction guide tube is provided at the distal end thereof with a mechanism for retaining and/or rotating a distal end of a treatment tool inserted therethrough.

Endoscope therapeutic device

A surgical instrument. The surgical instrument may comprise a transducer and an end effector. The transducer may be configured to provide vibrations along a longitudinal axis at a predetermined frequency and may comprise a piezoelectric stack positioned along the longitudinal axis. The transducer also may comprise a first metallic end mass positioned along the longitudinal axis adjacent a first end of the piezoelectric stack and a second metallic end mass positioned along the longitudinal axis adjacent a second end of the piezoelectric stack. The length of the transducer may be greater than or equal to of one wavelength and less than ½ of one wavelength. The end effector may be coupled to the transducer and may extend along the longitudinal axis. The length of the transducer and the end effector may be a multiple of ½ of one wavelength.

Ultrasonic surgical instruments

A surgical instrument is provided and includes a housing having a shaft. An end effector assembly operatively connects to the shaft and has a pair of first and second jaw members. A jaw insert is operably associated with the first and second jaw members. The jaw insert includes one or more cam slots defined therein configured to receive a cam pin that upon movement thereof rotates the first and second jaw members from an open position to a clamping position and an opening defined therein configured to securely house a pivot pin that provides a point of pivot for the first and second jaw members. The jaw insert is manufactured from an insulative medium to dielectrically isolate the first and second jaw members.

Apparatus for performing an electrosurgical procedure

A system of rotate-to-advance medical devices including catheters, dilators, occluders, stents, suprapubic catheters and camera introducers configured with external screw threads and depending substantially on rotation for means of advancement and emplacement in mammalian genitourinary and gastrointestinal passages and organs.

Rotate-to-advance catheterization system

An electrical ablation apparatus comprises first and second electrodes. Each electrode comprises a first end configured to couple an energy source and a second end configured to couple to a tissue treatment region. An energy source is coupled to the first and second electrodes. The energy source is configured to deliver a first series of electrical pulses sufficient to induce cell necrosis by irreversible electroporation and a second series of electrical pulses sufficient to induce cell necrosis by thermal heating, through at least one of the first and second electrodes. The first series of electrical pulses is characterized by a first amplitude, a first pulse length, and a first frequency. The second series of electrical pulses is characterized by a second amplitude, a second pulse length, and a second frequency.

Electrical ablation devices

An electrosurgical apparatus, system, and method are disclosed. The apparatus, includes an elongate member defines a longitudinal opening. An elongate actuator member is slideably movable within the longitudinal opening. A proximal jaw member having a proximal portion is fixedly coupled to a distal end of the elongate flexible member. A distal jaw member has a proximal portion fixedly coupled to a distal end of the elongate actuator member. A first aperture is defined between the distal portion of the distal jaw member and the proximal portion of the distal jaw member. The distal jaw member is slideably movable relative to the proximal jaw member. The system includes a handle portion to receive a proximal end of the elongate actuator member of the apparatus. A method includes preparing the apparatus for surgery.

In-line electrosurgical forceps

An electrical ablation device includes an elongated flexible member having a proximal end and a distal end. A clamp jaw portion is located at the distal end of the elongated flexible member. The clamp jaw portion is operatively movable from an open position to a closed position. A cutting blade is located in the clamp jaw portion. The clamp jaw portion is adapted to couple to an electrical waveform generator and to receive an electrical waveform.

Electrical ablation surgical instruments

A surgical instrument can comprise a first electrode, a second electrode, and a retractable sheath. At least one of the electrodes can comprise an insulative jacket extending along the length thereof which can comprise a tissue stop for limiting the progression of the electrode into tissue. In various embodiments, a surgical instrument can comprise a first electrode, a second electrode, and a displaceable arc guard positioned between the electrodes. In certain embodiments, a surgical instrument can comprise an electrode including a flexible mesh configured to conform to the tissue against which it is positioned.

Surgical instrument comprising an electrode

A method for guiding an instrument associated with a medical device, such as an endoscope, is provided. The method is useful for positioning a flexible medical instrument extending from an instrument channel of an endoscope, such as for the treatment of tissue. The method is also useful for providing cooperative motion between first and second instruments extending from instrument channels within a patient's body lumen. In one embodiment, the step of guiding the instrument comprises bending the instrument as the instrument extends from the instrument channel.

Gary L. Long

Papers

Electrical ablation devices

In-line electrosurgical forceps

Electrical ablation surgical instruments

Surgical instrument comprising an electrode

Method for controlling position of medical instruments