Abstract: Methods and systems for adjusting a video imaging system that includes an auto-focus mechanism wherein an input from a user of the video imaging system invokes an auto-focus procedure. Responsive to the input, the auto-focus mechanism is scanned over a range of focal distance from a first setting to a second setting indicated by the input. A sequence of images using the video imaging system is captured while scanning the auto-focus mechanism over the range. The images in the sequence are processed so as to compute a measure of focal quality with respect to each of the images. The measure of the focal quality is analyzed so as to select an optimal focal distance, and the auto-focus mechanism is set to the selected focal distance.

Abstract: An electrosurgical system includes an electrosurgical instrument and a user alert means (78). The electrosurgical instrument includes an elongate body (1) having a proximal end (2) and a distal end (3), and a pair of jaws (12) carried by the elongate body and disposed at the distal end. An actuator mechanism (5) at the proximal end of the elongate body (1) is movable by the user of the instrument to open and close the jaws (12). The instrument includes first and second electrodes (13), (14) carried by the jaws (12), and at least one strain gauge (75) adapted to provide a signal representative of the closure force applied by the jaws (12). The strain gauge (75) sends signals to the user alert means (78), the user alert means supplying the user of the instrument with an indication (82) of the closure force being applied by the instrument.

Abstract: An electrosurgical instrument includes a handpiece, an electrode assembly comprising one or more electrodes attached to the handpiece, and connection means for connecting the handpiece to an electrosurgical generator. The handpiece comprises a housing, fluid supply lines for directing a cooling fluid to and from the electrode assembly, and a pump for driving cooling fluid through the fluid supply lines. The handpiece may also include a fluid reservoir. The pump, the fluid supply lines, and the reservoir are all wholly contained within the housing.

Abstract: An electrode assembly for an electrosurgical instrument, comprises a bipolar cutting blade, and fluid supply lines for directing a cooling fluid to the cutting blade, the cutting blade comprising first, second and third electrodes, and electrical insulators spacing apart the electrodes, the fluid supply lines being such that cooling fluid enters the cutting blade via the first electrode, passes through an aperture in the second electrode, and exits the cutting blade via the third electrode.

Abstract: An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes (2 and 3) are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least 50° C. is established between the first and second electrodes (2 and 3), such that the second electrode is maintained below a temperature of 70° C.

Abstract: A bipolar electrosurgical instrument for cutting and sealing tissue comprises first and second jaw members movable between open and closed positions so as to be capable of grasping tissue therebetween. The first jaw member includes first and second coagulating electrodes on its inner surface, and an insulating member separating the first and second electrodes. The first jaw member also includes a third cutting electrode on an outer surface separate from the inner surface, and the second jaw member has a tissue-contacting surface which is electrically insulating over its entire surface. The electrosurgical instrument is capable of selectively causing coagulation of tissue between the first and second electrodes, and/or the cutting of tissue contacted by the third electrode.

Abstract: An electrosurgical instrument includes a hand piece, an electrode assembly comprising one or more electrodes attached to the hand piece, and connection means for connecting the hand piece to an electrosurgical generator. The hand piece comprises a housing, fluid supply lines for directing a cooling fluid to and from the electrode assembly, and a pump for driving cooling fluid through the fluid supply lines. An electrosurgical cutting blade comprises a first electrode, a second electrode, and an electrical insulator separating the first and second electrodes. The first and second electrode have dissimilar characteristics, such that the first electrode is encouraged to become an active electrode and the second electrode is encouraged to become a return electrode. In use, a thermal differential is established between the first and second electrodes, either by thermally insulating the second electrode from the first electrode, and/or by transferring heat away from the second electrode.

Abstract: An electrode assembly for an electrosurgical instrument, comprises a bipolar cutting blade, and fluid supply lines for directing a cooling fluid to the cutting blade, the cutting blade comprising first, second and third electrodes, and electrical insulators spacing apart the electrodes, the fluid supply lines being such that cooling fluid enters the cutting blade via the first electrode, passes through an aperture in the second electrode, and exits the cutting blade via the third electrode.

Abstract: An electrosurgical instrument includes a handpiece, an electrode assembly comprising one or more electrodes attached to the handpiece, and connection means for connecting the handpiece to an electrosurgical generator. The handpiece comprises a housing, fluid supply lines for directing a cooling fluid to and from the electrode assembly, and a pump for driving cooling fluid through the fluid supply lines. The handpiece may also include a fluid reservoir. The pump, the fluid supply lines, and the reservoir are all wholly contained within the housing.

Abstract: An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes (2 and 3) are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least 50° C. is established between the first and second electrodes (2 and 3), such that the second electrode is maintained below a temperature of 70° C.

Abstract: An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes (2 and 3) are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least 50° C. is established between the first and second electrodes (2 and 3), such that the second electrode is maintained below a temperature of 70° C.

Abstract: An electrosurgical cutting blade (1) comprises a first electrode (2), a second electrode (3), and an electrical insulator (4) separating the first and second electrodes. The first and second electrodes (2 and 3) have dissimilar characteristics (cross-sectional area, thermal conductivity etc.) such that the first electrode (2) is encouraged to become an active electrode and the second electrode (3) is encouraged to become a return electrode. The spacing between the first and second electrodes (between 0.25 mm and 3.0 mm) and the peak voltage supplied to the electrodes are both selected such that arcing does not occur directly between the electrodes, but between the first electrode and the tissue at the target site. The arrangement is such that, in use, a thermal differential of at least 50° C. is established between the first and second electrodes, such that the second electrode is maintained below a temperature of 70° C.

Abstract: A sheath for protection and stabilization of a medical implant during shipping and manipulation. The sheath protects a small or fragile medical implant from damage, breakage or loss during shipping, and provides support for trimming and other handling by a surgeon or other medical staff member. The sheath is made from a trimmable material and has at least one flat side to assist in manipulation of the medical implant.