A cordless surgical knife comprises an enclosure and a blade extending from the enclosure. The enclosure contains a differential amplifier circuit configured to provide an RF signal, an output monitor feedback circuit, a return monitor feedback circuit, and a microprocessor that receives data from the feedback circuits and adjusts the RF signal. The enclosure contains a receiving antenna that is operable to receive a wireless signal associated with the RF signal from tissue of a patient. A transmitting antenna may be in electrical contact with tissue of the patient and transmit the wireless signal. Optionally, both the receiving antenna and transmitting antenna include at least two separate inductive circuits aligned on different planes, or each of the receiving antenna and the transmitting antennas is encapsulated inside an enclosure floating in a liquid so that the antennas are aligned by gravity.

A device for dividing a fibrous structure comprising a catheter; an expandable member positioned near a distal end of the catheter and in fluid communication with a lumen of the catheter; and a cutting element situated on an outer surface of the expandable member. A method for dividing a fibrous structure comprising positioning, proximate the fibrous structure, an expandable member having a cutting element situated thereon; expanding the expandable member outwards to tension the fibrous structure across the cutting element; and activating the cutting element to weaken or cut the fibrous structure. A method for treating carpal tunnel syndrome comprising inserting a needle into the carpal tunnel; directing a guidewire to a position proximate the transverse carpal ligament; advancing, along the guidewire, a device having an expandable member and a cutting element; positioning the cutting element; tensioning the ligament across the cutting element; and weakening or cutting the ligament.

A system configured to cut leaflet tissue at a cardiac valve may comprise a guide catheter and a cutting mechanism routable through the guide catheter. The cutting mechanism includes a cutting arm and a plurality of grasping arms rotatably coupled to the cutting arm. The grasping arms are connected to the cutting arm via a central hinge and are actuatable between a closed position against the cutting arm and an open position where the grasping arms extend laterally away from the cutting arm by rotating about the hinge. Targeted cardiac leaflet tissue may be grasped between the cutting arm and the grasping arms and cut by a cutting element that is attached to or extends through the cutting arm.

An ultrapolar electrosurgery blade includes lop and bottom thin elongated conductive members in vertical, alignment and spaced apart, from one another along their lengths, a non-conductive coating covering both the top and bottom thin elongated conductive members and the space located between them to create opposing non-conductive sides of the blade with conductive cutting and ends and conductive non-cutting ends exposed, and both return and active contact layers located on each of the opposing non-conductive sides of the blade. An ultrapolar electrosurgery blade assembly having argon beam capability further includes a non-conductive tube member having a slot positioned over the top of the ultrapolar electrosurgery blade and a conductive hollow tubular member contained within at least a portion of the non-conductive tube member.

A uterine manipulator includes a shaft defining a proximal end portion and a distal end portion, a handle operably coupled to the proximal end portion of the shaft, and a distal assembly operably coupled to the distal end portion of the shaft. The distal assembly includes a colpotomy cup and an elongated tip extending distally from the colpotomy cup. At least a portion of the distal assembly is releasable from the distal end portion of the shaft and configured to engage tissue and to operably couple to a surgical tool to enable the surgical tool to perform at least one surgical task on tissue engaged by the at least a portion of the distal assembly.

A bipolar electrosurgical instrument includes first and second shafts each having a jaw member extending from its distal end. Each jaw member is adapted to connect to a source of electrosurgical energy such that the jaw members are capable of selectively conducting energy through tissue held therebetween. A knife channel is configured to reciprocate a cutting mechanism therealong. An actuator selectively advances the cutting mechanism. A switch is disposed on the first shaft and is configured to be depressed between a first position and at least one subsequent position upon biasing engagement with a mechanical interface disposed on the second shaft. The first position of the switch relays information to the user corresponding to a desired pressure on tissue and the at least one subsequent position is configured to activate the source of electrosurgical energy to supply electrosurgical energy to the jaw members.

In an example, an electrosurgical device includes a housing defining an interior bore. The electrosurgical device also includes a shaft telescopically moveable in the interior bore of the housing, an electrosurgical blade coupled to the shaft, and a helical conductor coiled around the shaft and configured to supply electrosurgical energy from an electrosurgical generator to the electrosurgical blade.

An end-effector and a surgical instrument including the end-effector are disclosed. The end-effector includes a clamp arm and an ultrasonic blade configured to acoustically couple to an ultrasonic transducer and to electrically couple to a pole of an electrical generator. The clamp arm includes a clamp jaw, a cantilever electrode configured to electrically couple to an opposite pole of the electrical generator. The cantilever electrode is fixed to the clamp jaw at a proximal end and free to deflect at a distal end. The clamp arm includes control features to adjust a tissue path relative to the clamp arm to create a predefined location of contact.

An electrode assembly for an electrosurgical pencil includes an insulative core configured to support an active wire around a peripheral surface thereof, the active wire electrically couples to an active pin that inserts into a distal end of the pencil. A ground electrode is operably coupled about the insulative core and inserts within the distal end of the electrosurgical pencil. An insulative material is disposed between the active pin and the ground electrode and is configured to at least partially encapsulate and electrically isolate the active pin from the ground electrode. A first hypotube is disposed atop the insulative core and extends along between the ground electrode and the insulative core, the first hypotube encapsulates the active wire to insulate the active wire from the ground electrode. A second hypotube is operably engaged to a proximal end of the insulative material and is configured to encapsulate the active pin.

An end-effector is disclosed. The end-effector includes a clamp arm and an ultrasonic blade configured to acoustically couple to an ultrasonic transducer and electrically couple to a pole of an electrical generator. The clamp arm includes a clamp jaw, a clamp arm pad, and a cantilever electrode that is free to deflect. The cantilever electrode is configured to electrically couple to an opposite pole of the electrical generator. Also disclosed are configurations where the clamp arm includes a peripheral cantilever electrode and a clamp arm pad extending beyond the electrode, a floating cantilever electrode and a resilient clamp arm pad, an interlocked cantilever electrode plate and a clamp arm pad configured to receive the plate, a laterally deflectable cantilever electrode and a clamp arm pad extending beyond the electrode, and a flexible cantilever electrode and a clamp arm pad extending beyond the electrode.