A medical device that is capable of reducing release of a state in which an energy transmission element is pressed against a biological tissue due to an erroneous operation or a malfunction of an operation unit. The medical device includes an expandable body, a shaft portion connected to the expandable body, an energy transmission element provided in the expandable body, a housing connected to a proximal end portion of the shaft portion, a displacement shaft configured to compress the expandable body in an axial direction, an operation knob configured to operate the displacement shaft that is movable from a first position to a third position via a second position, with respect to the housing, and a lock portion configured to lock the operation knob at the second position.

Apparatus and method for closure of the patent foramen ovale (PFO) is provided using expandable discs to appose the septum primum and septum secundum and to apply bipolar radiofrequency energy to anneal the tissues.

A system comprising a generator which is capable of supplying energy for puncturing a tissue and an electrical current of known voltage, wherein the electrical current of known voltage can pass through the tissue without damaging the tissue. The system also includes a puncturing device comprising an elongate member. A distal tip of the elongate member comprises an energy delivery device which is configured for delivering the energy for puncturing and two electrodes which are configured for delivering the electrical current of known voltage from one electrode to the other through a material which is in contact with the distal tip. The system further includes a sensor which is capable of detecting a value of the electrical current between the two electrodes. The generator comprises a generator switch for disabling energy delivery tip based on the value of the electric current detected by the sensor.

A microcatheter configured to have a geometry that is movable along a tortuous anatomy of the patient; and be positionable, at least in part, proximate to biological tissue of a patient; and emit an information signal, related to the biological tissue, to a medical system so that the medical system, in use, receives the information signal from the microcatheter and processes, in use, the information signal received from the microcatheter.

A septostomy device 10 with a cutting structure or means 140 and tissue capture mechanisms 240, 250 is disclosed, along with a medical procedure for using the device. The system 10 is configured in such a way as to create a permanent interatrial aperture in the heart, including creating a permanent interatrial hole and/or removing tissue.

A medical sheath includes an elongate member having a sidewall extending longitudinally between a proximal end portion of the elongate member and an opposed distal end portion of the elongate member, and radially between an outer surface of the elongate member and an inner surface of the elongate member. A lumen is defined by the inner surface and extends through the elongate member from the proximal end portion to the distal end portion. At least a first echogenic band is associated with the distal end portion and is secured to the sidewall.

A medical dilator includes an elongate member having a proximal end portion, an opposed distal end portion, and a lumen extending through the elongate member from the proximal end portion to the distal end portion. A dilating tip is at the distal end portion. The dilating tip has a first end of enlarged cross-sectional area and tapers going in the distal direction to a second end of reduced cross-sectional area. At least a first electrode is associated with the dilating tip. An electrical conductor is electrically connected to the first electrode and extends proximally from the first electrode towards the proximal end portion for electrical connection with an electro anatomical mapping system.

An energy generating device and a cauterization system capable of uniformly cauterizing a biological tissue at a desired damage level, and reducing the generation of tissue damage or the generation of peripheral embolism caused by the formation of blood clots. The energy generating device includes a control unit that controls an electric energy output to electrodes that cauterize a biological tissue. The control unit includes an impedance calculation unit that calculates an impedance between an electrode and an electrode serving as a return electrode of the electrode, and an output adjustment unit that causes electric power to the electrodes to decrease when the impedance calculated by the impedance calculation unit is equal to or greater than a predetermined threshold value.

A transseptal needle or punch is described wherein the distal end of the transseptal needle is able to articulate laterally out of the longitudinal axis of the steerable transseptal needle. The transseptal needle includes a blunted distal end configuration that is minimally traumatic. Under control by the user or a computer, the transseptal needle can be articulated to generate various curves with high bending force. The transseptal needle is configured for use with an introducer which can also include side windows.

A medical device includes an elongate shaft and an expansion body at a distal portion of the shaft portion. The shaft includes an outer tube, and an inner tube that is slidable inside the outer tube. The expansion body includes a first connecting portion connected to the outer tube, and a second connecting portion connected to the inner tube. The outer tube includes an open end where an opening portion is formed, and the inner tube enters/exits from the opening portion. The expansion body is settable to a reference form where the expansion body is radially widened, and is settable to a contracted form where the expansion body is radially contracted. In the reference form, the open end is between the first and second connecting portions, and when the expansion body is deformed from the reference form into the contracted form, the inner tube is extracted from the opening portion.