In one embodiment, a medical system includes a medical instrument includes an elongated shaft having a distal end, at least one cutting element disposed at a distal end of the shaft, a position-tracking transducer disposed at the distal end of the shaft, and electrically insulated from the shaft and the at least one cutting element, and at least one metal coagulation electrode disposed at least partially over the position-tracking transducer, which electrically isolates the at least one metal coagulation electrode from the shaft, a signal generator coupled to apply an electrical current to the at least one metal coagulation electrode, and processing circuitry configured to receive signals generated by the position-tracking transducer, and track a location of the distal end responsively to the received signals.

An ultrasonic surgical instrument and method of sealing a tissue includes measuring a first measured termination parameter with a controller and terminating an ultrasonic energy and an RF energy when the first measured termination parameter reaches a set one of a first smaller tissue predetermined termination parameter or a first larger tissue predetermined termination parameter to thereby inhibit transecting the tissue. The ultrasonic surgical instrument further includes an end effector having an ultrasonic blade, an RF electrode, and a controller. The controller operatively connects to the ultrasonic blade and the RF electrode and is configured to terminate the ultrasonic energy and the RF energy when the first measured termination parameter reaches the set one of the first smaller tissue predetermined termination parameter or the first larger tissue predetermined termination parameter to thereby inhibit transecting the tissue.

A method and system for preventing a collision between mechanical arms (21), and a medical robot, belonging to the field of medical robot technology. The method includes: arranging (S10) discrete points (m, n) at a mechanical arm (21); acquiring (S40) an interaction force (F.sub.m,n) corresponding to each discrete point (m, n) according to a calculated relative distance (L) between the discrete points (m, n) respectively on different mechanical arms (21), to obtain (S50) a resultant force of the interaction forces (F.sub.m,n) each of which corresponds to each discrete point (m, n), and then obtaining a Cartesian force (F.sub.d) corresponding to each mechanical arm (21), and making (S60) an operator perceive the Cartesian force (F.sub.d) in real time, thereby effectively reducing the risk of interference and collision between the mechanical arms (21).

An arthroscopic cutter according to one embodiment of the present disclosure includes an elongated outer sleeve that extends about a longitudinal axis with an interior bore having an open distal end. An inner sleeve is rotatable in the interior bore in the outer sleeve. The inner sleeve carries a distal housing having a longitudinal metal member and a longitudinal ceramic member that respectively form longitudinal-extending sides of the housing around an inner channel that communicates with a negative pressure source. The arthroscopic cutter also includes an electrode that is disposed in an outer surface of the longitudinal ceramic member.

An electrosurgical device comprising: (a) a stylet including: (i) a first jaw; (ii) a second jaw that is movable relative to the first jaw from a first position where the first jaw and the second jaw are open to a second position where the first jaw and the second jaw move towards each other to grasp tissue therebetween; and (iii) one or more jaw support rods connected to the first jaw, the second jaw, or both; and (b) a housing connected to the stylet and the stylet extending from the housing, the housing including: (i) an operable mechanism including: (1) a fourth link; (2) a second link; (3) a first link being connected to the fourth link via a first pivot and being rotatable relative to the first pivot, and connected to the second link at a second pivot so that movement of the first link moves the second link relative to the fourth link; and (4) a third link being connected to the second link at a third pivot so that movement of the second link moves the third link, and the fourth link being connected to the third link at a fourth pivot, the third link moving about the fourth pivot to move the one or more jaw supports so that the first jaw and the second jaw are moved between the first position and the second position; and wherein the fourth link is the housing and the first link is a clamp lever that extends outside of the housing and is actuated by a user.

A surgical stapler for stapling the tissue of a patient is disclosed. The surgical stapler comprises a handle, a shaft extending from the handle, and an end effector. The end effector comprises a tissue compression surface, a plurality of staples, and an anvil comprising staple forming pockets, wherein the anvil is movable toward the tissue compression surface during a closing stroke to clamp the patient tissue against and tissue compression surface. The surgical stapler further comprises an anvil closing system configured to move the anvil through the closing stroke, a staple firing system configured to deploy the staples during a staple firing stroke, and means for clamping and holding the patient tissue during the staple firing stroke and moving the end effector relative to the patient tissue after the staple firing stroke.

An apparatus includes a shaft assembly and an end effector, which includes first and second jaws pivotably coupled together. The first jaw includes a first jaw body and a first electrode surface. The second jaw includes a second jaw body and an electrode assembly, which includes a distal end pivotably supported by the distal end of the second jaw body. The electrode assembly further includes a second electrode surface positioned to face the first electrode surface when the first and second jaws are placed in a closed configuration. The first and second electrode surfaces are operable to apply RF energy to tissue. The electrode assembly further includes at least one compressible member interposed between the second electrode surface and the second jaw body. The at least one compressible is being configured to urge a proximal region of the second electrode surface toward a corresponding region of the first electrode surface.

A surgical instrument includes an ultrasonic transducer, a shaft defining a longitudinal axis, and an end effector at a distal end of the shaft. The end effector includes an ultrasonic blade driven by the ultrasonic transducer to treat tissue with ultrasonic energy. A tissue treatment portion of the ultrasonic blade includes a linear blade region extending parallel to the longitudinal axis, a curved blade region extending distally from the linear blade region along a curved path that deflects laterally from the longitudinal axis, an upper treatment side, a lower treatment side, a first lateral side having a first sweeping side surface, and a second lateral side having a second sweeping side surface. The sweeping side surfaces define respective first and second side edges of a transverse cross-section of the tissue treatment portion, and are configured such that the first and second side edges are parallel to one another.

Systems and techniques for a medical apparatus, specifically a handheld electrosurgical device, are described herein. In an example, the device includes an electrosurgical end effector, a temperature sensor to measure a temperature of the end effector, a cooler to cool the end effector based on the measured temperature, and a heater to heat the end effector based on the measured temperature. The end effector may be kept within a temperature range or band such as by allowing the end effector to be heated or cooled as desired during a surgical procedure.

A system configured to detach an interventional implant from a cardiac valve includes a guide catheter and a capture mechanism routable through the guide catheter. The capture mechanism comprises a capture hypotube with a container portion/space configured to receive an interventional implant connected to cardiac valve tissue. The capture mechanism also includes a cutting arm axially moveable relative to the capture hypotube. The capture hypotube and the cutting arm each include cutting elements that are brought together upon actuation of the cutting arm to thereby cut the cardiac valve tissue surrounding the interventional implant to free the implant from the cardiac valve.