A medical device includes a shaft including a central lumen configured to direct a flow of fluid through the shaft, and an electrode positioned at a distal portion of the shaft. The electrode includes an electrode lumen in fluid communication with the central lumen, and the electrode lumen is configured to receive the flow of fluid from the central lumen. The electrode also includes one or more channels angled relative to the electrode lumen, and the one or more channels are in fluid communication with the electrode lumen to receive the flow of fluid from the electrode lumen. The one or more channels are configured to divert the flow of fluid from the electrode lumen toward one or more outlets laterally offset from the electrode lumen.

This invention relates to electrosurgical systems for coagulation and ablation of tissue, including in relation to tissue biopsy.

Disclosed herein are methods to restore myocardial conduction via the injection of conductive nanoparticles into the myocardium via an endovascular injection catheter.

A medical system may comprise a catheter (101) for ablating tissue including a flexible longitudinal body including a distal end; and a distal portion extending distally from the distal end of longitudinal body. The distal portion may include a plurality of electrodes (103). The medical system may also comprise one or more control units (112) coupled to the catheter and configured to (1) control a supply of electrical energy to each of the plurality of electrodes and (2) automatically control a position of the distal portion of the catheter.

Embodiments provide a telescopic structure for an electrotome capable of evacuating smoke, including an electrotome pencil body. The electrotome pencil body is hollow inside and provided with an opening end at one end; the opening end of the electrotome pencil body is provided with a limit connection part. The limit connection part is sleeved with a collar; an elastic limiter is provided between the limit connection part and the collar. The telescopic structure for an electrotome capable of evacuating smoke further includes a channel that penetrates the collar and the elastic limiter in sequence and communicates with the inside of the electrotome pencil body. The telescopic structure for the electrotome capable of evacuating smoke enables the electrotome to adjust the length of the electrotome with one hand during use, which is more convenient in use and more convenient in operation.

A treatment apparatus includes a motorized subsystem in a handpiece housing having a rotating output shaft, an axial cam driven in rotation by the output shaft, and a push rod linearly driven by the axial cam. A cartridge is removably attachable to the handpiece housing and includes a cartridge housing, a needle assembly, a piston in the housing engaging the needle assembly and linearly driven forward by the push rod, and a first biasing member urging the piston rearward.

A method includes cutting a septal wall between a right atrium and left atrium of a heart of a patient to form a multi-cuspid valvular shunt, and ablating septal wall tissue of at least a portion of the multi-cuspid valvular shunt to cause the ablated portion of the multi-cuspid valvular shunt to be biostable.

Disclosed are a medicine injection tip that may smoothly insert and discharge a needle into and from skin, a hand piece, and a skin treatment device.

A catheter system for ablation of tissue around a blood vessel, e.g., the pulmonary artery, to reduce neural activity of nerves surrounding the blood vessel. The catheter system includes an elongate shaft having a proximal portion coupled to a handle, and a distal portion. The distal portion includes a transducer and an expandable anchor, which may be actuated to transition between a collapsed delivery state and an expanded deployed state where the anchor centralizes the transducer within the blood vessel. The transducer may be actuated to emit energy to reduce neural activity of the nerves surrounding the blood vessel. Systems and method are further provided for confirming that neural activity of the nerves surround the blood vessel has been sufficiently reduced.

Tissue may be cut and extracted from an interior location in a patient's body using a probe or tool which both effects cutting and causes vaporization of a liquid or other fluid to propel the cut tissue through an extraction lumen of the cutting device. The cutting may be achieved using an electrosurgical electrode assembly, including a first electrode on a cutting member and a second electrode within a cutting probe or tool.