A surgical instrument, comprising a motor drive unit comprising a motor drive unit; a rotary surgical end effector arranged to be coupled to the motor drive unit; and a coupling means for coupling the motor drive unit and the rotary surgical end effector, the coupling means being configured such that there is only one possible rotational alignment between the rotary surgical end effector and the motor drive unit when coupled. This arrangement guarantees the rotational position of the rotary surgical end effector in relation to the rotational position of the motor drive unit. This enables quick and easy control of the rotational position of the rotary surgical end effector.

Prostate treatment using fluid stream to resect prostate tissue, thereby relieving symptoms of conditions such as BPH, prostatitis, and prostatic carcinoma. A device having a fluid delivery element is positioned within a lumen of the urethra within the prostate. A fluid stream is directed outwardly from the fluid delivery element toward a wall of the urethral lumen. The fluid delivery element is moved to scan the fluid stream over the wall to remove a volume of tissue surrounding the lumen. The fluid may be combined with therapeutically active substances or with substances that increase resection efficiency. Fluid force may be adjusted to provide selective tissue resection such that soft tissue is removed while harder tissue is left undamaged. In order to gain a working space within the urethra, another fluid may be introduced to insufflate the urethra in the region of treatment.

A dual blade device and method useable for performing an ab interno procedure within a human eye to remove a strip of trabecular meshwork tissue.

The present invention relates to steerable access sheath assembly including at least one electrode. Moreover, the present invention relates to a steerable sheath access device for use in cardiovascular procedures. Embodiments of the present invention including steerable access sheaths or introducers may provide cardiovascular access for various ablation tools and devices for the performance of various ablation procedures or procedures involving alternate energy sources.

A medical device for directionally focusing energy to a treatment site, the medical device including a shaft having an elongated body defining a proximal portion and a distal portion opposite the proximal portion, the distal portion including at least one electrode having a contact portion and a permeable sheath at least partially surrounding the at least one electrode, the permeable sheath and the at least one electrode defining an insulation cavity, the permeable sheath being impermeable to an insulation material introduced to the insulation cavity from a fluid source configured to be coupled to the shaft.

In some embodiments, the inventive subject matter is directed to a multimode electrosurgical system having an electrosurgical instrument with a first electrode configuration that operates in a bipolar mode and second electrode configuration that operates in a monopolar mode. In other embodiments, the inventive subject matter is directed to an instrument and system that provide multiple modes of surgical and/or therapeutic treatments, at least one being an electrosurgical mode of treatment, the instrument including at least one active electrode on a working portion, and the working portion including or supporting at least one non-electrosurgical functional element, the instrument including at least one operational return electrode configuration of selectively variable surface area.

A mapping and ablation catheter is presented. The mapping and ablation catheter comprising an elongated catheter shaft and an ablation portion being arranged at a distal end of the catheter shaft, wherein: the ablation portion comprises a plurality of loop segments; at least one first loop segment of the plurality of loop segments exhibits one or more ablation electrodes, the one or more ablation electrodes being configured for delivering energy to vascular tissue; the loop segments together form a three-dimensional spiral; and respective diameters of the loop segments are such that each loop segment rests on a neighboring loop segment when the three-dimensional spiral is compressed. The plurality of loop segments comprises a stabilizer loop segment, which does not does not exhibit any electrodes, wherein the stabilizer loop segment is the most proximal loop segment of the plurality of loop segments.

The invention relates to an ablation catheter for treatment of a patient's tissue, for example for a PVI procedure on a patient's heart, comprising an elongated catheter shaft and an ablation portion being arranged at a distal end of the catheter shaft with a plurality of electrodes accommodated along the ablation portion, wherein the ablation portion comprises at least two loop sections forming a three-dimensional spiral. In order to increase safety of ablation treatment, spare adjacent tissue (e.g. nerves, vessels, esophagus) and shorten ablation time, a pitch, or clearance of two neighboring loop sections is greater than an ionization threshold of the medium around the distal section, for example blood or gases resulted from electrolysis. The invention further relates to an operation method of such ablation catheter.

Electrosurgical devices that reduce surgery time while still adhering to surgical standards are provided. An electrosurgical device can include a tripolar configuration. A primary electrode can be used to generate a vapor pocket. A secondary electrode can be activated after the vapor pocket is generated. The vapor pocket can be steered to be between the primary and secondary electrodes and a surgery target.

A surgical instrument includes a sheath and an energy catheter. The sheath is configured to be inserted into a nasal cavity of a patient's head. The energy catheter includes a shaft and an end effector. The end effector is configured to selectively expand radially outwardly. The end effector includes an energy member that includes a flexible wire and electrodes disposed along the wire. The energy catheter is selectively translatable relative to the sheath. In a proximal position, the end effector is housed coaxially within the sheath to thereby prevent the end effector from radially expanding. In a distal position, the end effector is exposed from the sheath to thereby permit the end effector to expand for contacting tissue in the nasal cavity of the patient's head. When the end effector is in the expanded state, the end effector has a width and a length greater than the width.