A method for tissue coagulation includes using a device that has a plurality of conductive elements and a return electrode which is in the form of a grid. A moving mechanism moves the conductive elements so that the tip of each conductive element protrudes distally through the spaces of the grid of the return electrode into a tissue at a first depth. A first radiofrequency (RF) voltage is applied between the tips of each conductive element, which are at the first depth, and the return electrode. The conductive elements are then moved from the first depth to second depth of protrusion, and a second RF voltage is applied between the tips of each conductive element at the second depth and the return electrode.

An interactive control unit is disclosed. The interactive control unit includes an interactive touchscreen display, an interface configured to couple the control unit to a surgical hub, a processor, and a memory coupled to the processor. The memory stores instructions executable by the processor to receive input commands from the interactive touchscreen display located inside a sterile field and transmit the input commands to the surgical hub to control devices coupled to the surgical hub located outside the sterile field.

An end effector includes a grasping portion that includes a first jaw member having a first electrode, a second jaw member having a second electrode, a first electrically conductive member located either on the first jaw member or the second jaw member, and a gap setting portion having a second electrically conductive member located at the distal end of either the first jaw member or the second jaw member. The electrically insulative member is sized and configured to engage tissue and the second electrically conductive member sized and configured to define a minimum distance between the first and second electrodes.

An end effector for an electrosurgical instrument is disclosed which includes a first jaw, a first energy delivery surface, a first distal end, and a first proximal end. A second jaw of the end effector includes a second energy delivery surface, a second distal end, and a second proximal end. The end effector also includes an electrically conductive gap setting member which defines a distal gap distance between the first and second energy delivery surfaces. At least one pivot is fixed to one of the jaws to set a proximal gap distance between the first and second energy delivery surfaces. A method for making an end effector and a method for assembling an end effector for an electrosurgical instrument are also disclosed.

An end effector includes a first and second jaw member each comprising a first and second electrode. The first and second jaw members are movable relative to the other between an open position and a closed position. An electrically conductive member is located at the distal end of the first jaw member. The electrically conductive member is sized and configured to define a minimum distance between the first and second electrodes along the length of the first and second electrodes. An electrically insulative member is located on one of the first jaw member or the second jaw member. The electrically insulative member is sized and configured to engage tissue and has a dimension extending from one of the first jaw member or the second jaw member. The dimension is less than the minimum distance.

An end effector for an electrosurgical instrument is disclosed which comprises a first jaw comprising a first energy delivery surface, a first distal end, and a first proximal end; and a second jaw comprising a second energy delivery surface, a second distal end, and a second proximal end, wherein the first energy delivery surface comprises a first curved portion that is outwardly curved, and the second energy delivery surface comprises a second curved portion that is inwardly curved. The first jaw or the second jaw is configured for pivotal movement between an open position and a closed position. In the open position, the first and second distal ends are separated apart. In the closed position, the first and second distal ends are in proximity. The end effector also comprises an electrically conductive member which protrudes from either the first or second jaw.

An ablation catheter device (100) comprises a hollow catheter main body (102), an ablation mechanism (103) and a control mechanism. The ablation mechanism (103) comprises a support assembly (110) capable of being expanded and compressed radially, an end (120) and a plurality of modulation units. The support assembly (110) is provided between the distal end of the catheter main body (102) and the end (120). The modulation units are provided on the support assembly (110), and an axial through hole (122) is formed in the end (120). The control mechanism comprises a drawing wire (104) and a limit unit (118) fixed on the drawing wire (104). The drawing wire (104) axially extends through the catheter main body (102) and the through hole (122). The end (120) is provided between the support assembly (110) and the limit unit (118), and the outer diameter of the limit unit (118) is larger than the inner diameter of the through hole (122). The ablation catheter device (100) is suitable for a transfemoral coronary puncture intervention path, or is preferably suitable for a transradial coronary puncture intervention path. For some bent and complex artery blood vessels, the ablation catheter device (100) can reduce difficulty in adjustment and movement in the blood vessels, avoid damage to the blood vessels as much as possible, and improve the ablation effect.

The limiting device includes a clamping portion and a movable portion; the clamping portion and the movable portion are both annular structures, two ends of the clamping portion and the movable portion are respectively connected to form a connected double-ring structure, and the ring diameter of the movable portion is larger than that of the clamping portion. The limiting device is disposed on a core rod, the clamping portion and the core rod are in interference fit, and the movable portion and the core rod are in clearance fit. When the movable portion cooperates with the core rod, the limiting device may slide relative to the core rod; when the clamping portion cooperates with the core rod, the limiting device and the core rod are in a fixed state, and the limiting device cannot slide relative to the core rod, thus achieving the purpose of limiting.

A surgical instrument includes a housing, a shaft extending distally from the housing, an end effector assembly at a distal end portion of the shaft, and a drive assembly. The drive assembly includes a movable handle, a carriage operably coupled to the movable handle, an inner drive operably coupled to the end effector assembly, and a spring assembly operably coupling the carriage and the inner drive. The spring assembly includes inner and outer coil springs arranged in a nested configuration. Initial actuation of the movable handle slides the carriage such that the spring assembly transfers the sliding of the carriage into translation of the inner drive to apply a jaw force by the end effector assembly. Subsequent actuation of the movable handle slides the carriage to compress the spring assembly to substantially maintain a position of the inner drive, thereby controlling the jaw force.

A surgical instrument includes a movable handle movable relative a housing to manipulate an end effector assembly, and a latch assembly. The latch assembly includes a latch arm including a latch post, and a latch track defining an entry path, a latching path, a saddle, an un-latching path, and a return path. The latch post moves through the entry path, the latching path, and into the saddle upon movement of the movable handle from an un-actuated position to an over-actuated position and back to an actuated position to lock the movable handle. The latch post moves from the saddle through the un-latching path and the return path upon movement of the movable handle from actuated position to the over-actuated position and back to the un-actuated position. The return path includes a ramped surface configured to inhibit reverse travel of the latch post into the return path.