The disclosed technology includes a medical probe comprising a tubular shaft extending along a longitudinal axis and including a proximal end and a distal end. The medical probe further comprises an expandable basket assembly proximate the distal end of the tubular shaft. The basket assembly comprises a first unitary tripodic structure and a second unitary tripodic structure, each tripodic structure formed from a respective planar sheet of material that includes three linear spines converging at a respective central spine intersection and one or more electrodes coupled to each of the spines, each electrode defining a lumen through the electrode so that the spine extends through the lumen of each of the one or more electrodes. Each tripodic structure formed from a respective planar sheet of material that includes three linear spines converging at a respective central spine intersection.

The disclosed technology includes a medical probe comprising a tubular shaft extending along a longitudinal axis and including a proximal end and a distal end. The medical probe further comprises an expandable basket assembly proximate the distal end of the tubular shaft. The basket assembly comprises a single unitary structure that includes a plurality of linear spines formed from a planar sheet of material and one or more electrodes coupled to each of the spines, each electrode defining a lumen through the electrode so that a spine extends through the lumen of each of the one or more electrodes. The spines converge at a central spine intersection at a distal end of the basket assembly. The central spine intersection includes one or more cutouts that allows for bending of the spines. Each spine comprises a respective end connected to the distal end of the tubular shaft.

A method for ablating tissue by applying at least one pulse train of pulsed-field energy. The method includes delivering a pulse train of energy having a predetermined frequency to cardiac tissue, the pulse train including at least 60 pulses, an inter-phase delay between 0 μs and 5 μs, an inter-pulse delay of at least 5 μs, and a pulse width of 5 μs.

A method and system for lesion formation assessment in tissue that has undergone an ablation procedure. In one embodiment, a method of assessing lesion formation comprises: recording a baseline impedance measurement from an area of tissue with a medical device; ablating the area of tissue with the medical device; recording a post-treatment impedance measurement from the area of tissue with the medical device; identifying at least one amplitude characteristic of the baseline impedance measurement and identifying at least one amplitude characteristic of the post-treatment impedance measurement; comparing the at least one amplitude characteristic of the baseline impedance measurement and the at least one amplitude characteristic of the post-treatment impedance measurement; generating an indication of efficacy based on the comparison, the indication of efficacy being one of sufficient lesion formation and insufficient lesion formation; and re-ablating the area of tissue if the indication of efficacy is insufficient lesion formation.

A method of manufacturing a catheter tip by electroplating a conductive material over an insert comprising a negative to a domelike shape thereby forming a shape of the catheter tip comprising a dome with the domelike shape, selectively positioning a plurality of irrigation holes between outer and inner surfaces of the catheter tip, removing the insert thereby leaving the catheter tip and the plurality of irrigation holes, and electropolishing the catheter tip. In other examples, the insert is not removed and instead the step of electroplating causes the insert to be encapsulated with the conductive material thereby forming the catheter tip.

Described herein are elongate applicator tools adapted to be inserted into a body to deliver high voltage, sub-microsecond electrical energy to target tissue. These tools may be configured as laparoscopes, endoscopes, and/or catheters. Also disclosed herein systems including these tools and method of their operation.

The present invention relates to an ablation equipment (100) to treat target regions of tissue (41) in organs (44), comprising an ablation catheter (1) and a single power source (4); said ablation catheter (1) comprising: a catheter elongated shaft (13) comprising at least an elongated shaft distal portion (17); said catheter elongated shaft (13) comprising a flexible body (207) to navigate through body vessels (208); said ablation catheter (1) further comprising a shaft ablation assembly (20) disposed at said elongated shaft distal portion (17); said shaft ablation assembly (2) comprising at least a plurality of electrodes (127, 113 or 114) fixedly disposed at said elongated shaft distal portion (17); all electrodes of said at least a plurality (127, 113 or 114) being electrically powered by said single power source (4) through an electric signal (S) to deliver both non-thermal energy for treating the tissue (41) and thermal energy for ablating the tissue (41); wherein said electric signal (S) comprises a sinusoidal wave, and said single power source (4), when requested, changes continuously said electric signal (S) in order to power the said least a plurality of electrodes (127, 113 or 114) to deliver from a non-thermal energy to a thermal energy, and vice versa, or to deliver at the same time a combination of thermal energy and non-thermal energy.

A surgical instrument connectable to a surgical energy module that is configured to provide a first drive signal at a first frequency range for driving a first energy modality and a second drive signal at a second frequency range for driving a second energy modality is provided. The surgical instrument can comprise a surgical instrument component configured to receive power from a direct current (DC) power source, an end effector, and a circuit. The circuit can be configured to convert the first electrical signal to a DC voltage, apply the DC voltage to the surgical instrument component, and deliver the second energy modality to the end effector according to the second drive signal. Alternatively, the circuit can be disposed within a cable assembly configured to connect the surgical instrument to the surgical energy module.

A surgical instrument that includes a surgical end effector that is articulatable relative to a proximal shaft segment of the surgical instrument. The surgical end effector is attached to the proximal shaft segment by an articulation joint that comprises a plurality of movably interconnected links that interface with a centrally disposed drive member to apply articulation motions thereto and which serve to provide improved lateral stability to the articulation joint.

An adapter can include circuitry that can toggle between a mapping state and an ablation state. In the mapping state the circuitry can connect the catheter to a mapping system so that the catheter can measure electrical signals from multiple independent electrodes on an end effector of the catheter. In the ablation state the circuitry can connect the catheter to an ablation generator so that the catheter can apply electrical signals to the electrodes to ablate using IRE and/or RF techniques. The circuitry can short together a group of electrodes in the ablation state and electrically isolate the electrodes in that group from each other when in the mapping state. Using the adapter, the catheter can ablate and map at a treatment site without having to be repositioned between the mapping and ablation steps.