Disclosed embodiments include apparatuses, systems, and methods for positioning electrodes within a body. In an illustrative embodiment, a control handle is selectively engageable with primary and secondary actuators respectively coupled with primary and secondary electrodes. At a first position, the primary and secondary actuators are movably engaged to move in concert to a second position where distal ends of the electrodes extend into a target region. At the second position, the control handle is engaged with the secondary actuator and movable independently of the primary actuator in a first direction to a third position where the distal end of the secondary electrode extends beyond the distal end of the primary electrode. At the third position, the control handle is movably engaged with the primary actuator and movable independently of the secondary actuator in a second direction to a fourth position to partially retract the distal end of the primary electrode.

A device for radio frequency (RF) skin treatment of skin of a user comprising an active electrode, a return electrode, an RF generator arranged to supply RF energy to the user's skin via the active and return electrodes. The return electrode having a planar skin contact surface extending in a main plane. The active electrode having a skin contact surface with a maximum dimension in a range from 100 μm to 500 μm. The surface area of the planar skin contact surface of the return electrode is at least 5 times larger than a surface area of the skin contact surface of the active electrode. The skin contact surface of the active electrode is arranged in a position at a distance from the main plane. The device may be used to control the dimensions and shape of a thermal lesion in the user's skin generated by the RF energy.

A system is configured to delivering radiofrequency power to the endometrial lining tissue of a uterine cavity, including modulating the delivered power so that a measured impedance of the endometrial lining tissue tracks a target impedance as a function of time, wherein the target tissue impedance is derived from a function that approximates a preferred endometrial lining tissue ablation impedance curve that is determined based upon a measured impedance of the endometrial lining tissue after RF power has been delivered for a predetermined initial time period.

An ablation cap including a body having a lumen for receiving a distal end of an endoscope, the body having a central axis extending therethrough, and at least one guide for receiving at least one lateral extension of an electrode platform, wherein at least a portion of the at least one guide extends at an angle relative to the central axis of the body.

Disclosed herein are a surgical navigation instrument having a needle electrode depth adjusting structure for detecting impedance and a high frequency energy control method using the same. The present invention can detect impedance of tissues while applying a pilot signal to an electrode of a high frequency needle according to impedance conditions of the tissues to detect impedance of the tissues, and determine an applied amount of high frequency energy output to high frequency needles according to the detected impedance, thereby reducing patients' pains, maximizing treatment effect, and reducing treatment time according to high frequency energy applied to various depths at the same treatment point when performing a surgical procedure with the same or different treatment parameters according to disease symptoms while selecting the insertion number of high frequency needles, which can be adjusted in penetration depth, into the skin.

A deployment mechanism for selectively deploying and retracting an energizable member and/an insulative member relative to an end effector assembly of a surgical instrument includes one or more actuators, a clutch assembly, and a drive assembly. The clutch assembly is configured to couple to the actuator(s) to provide rotational motion in the first direction in response to such rotation of the actuator(s) and to decouple from the actuator(s) in response to rotation thereof in the second direction. The drive assembly is operably coupled to the clutch assembly and is configured to convert the rotational motion provided by the clutch assembly into longitudinal motion to translate the energizable member and/or insulative member from a storage position to a deployed position and to translate the energizable member and/or the insulative member from the deployed position back to the storage position.

An interventional device for cutting tissue at a targeted cardiac valve, such as a mitral valve. The interventional device includes a catheter having a proximal end and a distal end. A cutting mechanism is positionable at the distal end, such as by routing the cutting mechanism through the catheter to position it at the distal end. The cutting mechanism includes one or more cutting elements configured for cutting valve tissue when engaged against the tissue. A handle is coupled to the proximal end of the catheter and includes one or more controls for actuating the cutting mechanism.

A device for treating tissue includes a catheter including an elongated body extending from a proximal end to a distal end and including a lumen extending therethrough, a distal tip connected to the distal end of the elongated body and including a first electrode and a second electrode extending thereabout, the first electrode extending to a distal opening of the lumen and a first needle extending longitudinally from a proximal end to a distal end, the first needle slidably received within the lumen of the catheter to be moved between a retracted bipolar configuration, in which the distal end of the needle is proximal the distal opening of the catheter, and an extended monopolar configuration, in which the distal end of the first needle extends distally past the distal opening of the catheter so that the first needle contacts the first electrode and is configured to cut tissue.

A medical device for performing a hysterectomy is provided. The medical device has a tissue incision assembly that includes a first cup nested within a second cup. The tissue incision assembly also includes a spacer assembly between the first cup and the second cup in order to maintain a spacing between the first and second cups. The tissue incision assembly also has a cutting implement that has a portion extending between, and movable with respect to, the first and second cups. The cutting implement can provide a circular cut guided via the spacing between the first and second cups.

An electrosurgical end effector for a surgical tool to perform teleoperated surgical operations. The electrosurgical end effector comprises a first end effector jaw; a second end effector jaw coupled to the first end effector jaw; and a coupling pin configured to rotatingly couple the first end effector jaw to the second end effector jaw so as to cooperatively rotate open and close about an axis of rotation. The electrosurgical end effector further comprises an actuation mechanism coupled to an end of the first end effector jaw to rotate the first end effector jaw about the coupling pin; an otomy feature coupled to the second end effector jaw; and a first electrical conductor to electrically couple the otomy feature to a generator. In one embodiment, the otomy feature is electrically activated by contact with a cam portion of the first end effector jaw, when opened beyond a predetermined jaw angle.