A surgical instrument with a shaft is constructed as a hollow tube and has a longitudinal axis, proximal and distal ends and a metal wire having a first end section, a shaft section and a working section. The first end section is arranged in the area of the proximal end of the shaft or is guided out of the shaft on the proximal end. The shaft section is guided in the hollow tube and the wire is arranged such that it can move along the longitudinal axis of the shaft into a first position of the working section on the distal end projecting out of the shaft and into a second position of the working section within the shaft. The instrument is constructed as a bipolar instrument, wherein the metal wire is part of a first electrode and a second electrode is arranged in some sections on the shaft.

Disclosed are a detection mechanism, a radio-frequency ablation catheter, and a radio-frequency ablation system. The radio-frequency ablation catheter includes a handle portion, a needle tube portion, a central electrode, and a detection mechanism. The needle tube portion includes a first tube and a second tube, the handle portion includes a cylinder sleeve and a sliding button, the central electrode includes an electrode body, an electrode wire, and an electrode connector, and the detection mechanism includes a fixing base, a pulling string, a connecting base, and multiple detection electrodes arranged in a claw-shaped configuration. A distal end of the pulling string is fixed to the fixing base, and a proximal end of the pulling string is fixed to the sliding button; and the detection electrodes are fixed to the fixing base, and slidably provided in the connecting base.

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.

Devices, systems, and methods to verify a magnetic field phase drift and to check for proper function of a laser fiber cooling system during laser ablation therapy are disclosed. The laser fiber cooling system includes a cooling catheter insertable into laser ablation target tissue, a coupling assembly to define fluid channels, inflow and outflow ports, a fluid pump to pump fluid through the laser fiber cooling system, a fluid source, a first sensor to measure an inflow fluid parameter, a second sensor to measure an outflow fluid parameter, and a processor. Methods of verifying and checking include measuring the fluid parameter, comparing the inflow and outflow parameter measurements to determine a comparison value, comparing the comparison value to a tolerance range, and signaling a user when the comparison value is outside of the tolerance range.

An effortless means for deflating a balloon of a catheter. A catheter system includes a catheter, a circuit for making fluid flow through the catheter, and a drive device having a bidirectionally drivable pump and a controller. The catheter includes an inflatable balloon, and a first lumen and a second lumen that allow the fluid to flow through the balloon. The controller drives the pump in a first direction to make the fluid flow from a buffer tank via a first flow path into the first lumen and to make the fluid flow out from the second lumen via a second flow path to the buffer tank, and drives the pump in a second direction opposite to the first direction to make the fluid flow from the first lumen via the first flow path into the buffer tank.

The present invention relates to a skin treatment device including a handpiece and a needle tip enabling to be coupled to the handpiece, wherein as the needle tip is mounted on the distal end of the handpiece, electrical connection with the handpiece can be made stably, and even if the needle module built in the needle tip performs linear reciprocating motions of extension and retraction by the driving device provided in the handpiece, the motion trackable connector provided in the needle tip can stably keep the electrical connection between the handpiece and the needle tip.

An ablation device including a body having a lumen for receiving a distal end of an endoscope, a cover portion extending from a side of the body, the cover portion defining a recess between the cover portion and the body, and an electrode platform having at least one electrode positioned thereon, the electrode platform movable between a covered position, where the at least one electrode is covered by the cover portion, and an exposed position, where the at least one electrode is at least partially exposed beyond the cover portion. At least one vacuum port is formed in the electrode platform.

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.

Tissue is resected and extracted from an interior location in a patient's body using a probe or tool which both effects resection and causes vaporization of a liquid or other fluid to propel the resected tissue through an extraction lumen of the resecting device. Resection is achieved using an electrosurgical electrode assembly including a first electrode on a resecting member and a second electrode within a resection probe or tool. Over a first resecting portion, radio frequency current helps resect the tissue and over a second or over transition region, the RF current initiates vaporization of the fluid or other liquid to propel the tissue from the resection device. In one embodiment, an extending element extends from a housing and into a channel in a resecting member as the resecting member moves toward a distal position.

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.