An endoscopic snare device (10, 100, 100′) includes a pair of bowed, resiliently deformable, snare wires (12, 14) with bow shaped memory, a mesh (20) attached to mid-portions (16, 18) and distal portions (22, 24) of the snare wires (12, 14) for a mesh length (A) that is less than the snare length (L), a bowed, resiliently deformable, support wire (116) extending in a plane out of the plane of the snare wires (12, 14), and a pair of bowed, resiliently deformable, incising wires (112, 114) side by side with the snare wires (12, 14). The support wire (116) is electrically insulated. A mouth cord or wire (46) extends from one snare wire (12), through the support wire (116), and to the other snare wire (14).

A treatment device includes a flexible sheath; a control wire that can move axially within the flexible sheath; a first treatment member connected to a distal end of the control wire; a second treatment member connected to a distal end of the first treatment member; and a protection member that covers the second treatment member depending on the mode of operation. When the treatment device is in a first treatment mode, the second treatment member projects from a distal end of the protection member. When the treatment device is in a second treatment mode, the first treatment member projects from the distal end of the flexible sheath, and the protection member covers the second treatment member.

The disclosure provides various embodiments of catheters having articulable ends that can be used for various procedures. Embodiments of methods are also provided that can be performed with catheters in accordance with the present disclosure.

A device and system for removing polyps is provided and includes a tubular member having proximal and distal ends, a snare portion operably extending from within the distal end of the tubular member, the snare portion including a cutting member for severing the sealed tissue. The polyp removal device may further include a handle portion operatively extending from within the proximal end of the tubular member. The handle portion may be configured for operable engagement by a user and the cutting member may extend between distal ends of the first and second electrodes.

An electrosurgical snare, e.g. suitably sized for insertion down the instrument channel of an endoscope, arranged to radiate microwave frequency energy (e.g. having a frequency greater than 1 GHz) from an elongate conductive element within an area encircled by a retractable loop. The elongate conductive element and retractable loop may be independently slidable relative to a snare base at a distal end of a sleeve to provide an appropriate device configuration. By controlling the shape of the emitted microwave field, the risk of collateral thermal damage can be reduced.

A tissue removal system for extracting a tissue specimen from a patient and a related method are disclosed. The system has a flexible container with an opening associated with a proximal end, and a distal end. The system also has a plurality of wires removably coupled to an interior of the flexible container in a pre-collection configuration wherein the plurality of wires form a receiving space for receiving the tissue specimen and wherein the plurality of wires are positioned in a pattern. The pattern is selected to divide the tissue specimen into at least four pieces in response to at least one pulling force on the plurality of wires.

Extraction devices for extracting chronically implanted devices such as leadless cardiac pacemakers (LCP). In some cases, the extraction devices may be configured to cut or tear through at least some of the tissue ingrowth around and/or over the chronically implanted device such that a retrieval feature on the chronically implanted device may be grasped for removal of the chronically implanted device.

A retrieval catheter and methods of use are described for removing a heart valve therapy such as a leaflet clip or artificial leaflet cord. The retrieval catheter can include a cutting element and a basket, piercing element, clamping mechanism, or similar grasping device. The method includes delivering a catheter to the region of the heart valve therapy and then manipulating the catheter and associated instruments to cut tissue as necessary and then remove the heart valve therapy and withdraw the catheter.

A tissue segmentation device, controller, and methods therefore are disclosed. The device has an active electrode, a return electrode, a mechanical force application mechanism, voltage and current sensors, and a controller. The controller has a processing component, configured to assign a circuit status to a circuit comprising the at least one electrode. IF (PF0) and ((Vrms/Irms)T), THEN the circuit status is open. IF (PF0) and ((Vrms/Irms)<T), THEN the circuit status is short. PF is a power factor of power applied to the electrosurgical device. T is a threshold value.

This disclosure is directed to a method for providing electrical communication with a heart using a catheter having a lasso electrode assembly with a moveable spine. The lasso electrode assembly may have an array of sensing electrodes and may be configured to engage the ostium of the vessel of a patient. The moveable spine may have an ablation electrode and may travel along track around the circumference of the lasso electrode assembly. By adjusting the position of the moveable spine, tissue may be ablated to form lesions around a circumference of the vessel.