6 results about "Surgical ablation" patented technology

The invention discloses a direction-adjustable bending radiofrequency ablation electrode needle which comprises an ablation needle handle, a coaxial sheath, a steering electrode needle, an electrode wire, an outflow tube, an inflow tube and a negative electrode patch. The steering electrode needle is arranged in an inner cavity of the ablation needle handle and the coaxial sheath, the steering electrode needle made of shape memory alloy and the coaxial sheath are matched in a push-pull mode to synchronously adjust and control the length and the angle of the electrode needle, the needle point of the electrode needle is coated with the conductive nanometer coating, protein, tissue and the like are prevented from being adhered to the needle point, and carbonization is reduced. The direction of the ablation electrode needle and the length of the working end can be adjusted and controlled, a safer, more effective and more stable operation ablation treatment mode is achieved through the conductive ceramic coating on the needle tip part, the electrode needle can be suitable for Liwen operation type treatment of complex hypertrophic cardiomyopathy ventricular septal parting, and the safety, effectiveness and operability of the Liwen operation type operation process can be improved.

The invention relates to the field of medical instruments, in particular to surgical ablation forceps which comprise a first forceps arm and a second forceps arm. The first forceps arm is arc-shaped, a first electrode is arranged on the inner side of the first forceps arm, and the first electrode is connected with the first forceps arm through an elastic mechanism or an air bag; the second forceps arm is arc-shaped, a second electrode is arranged on the inner side of the second forceps arm, and the second electrode is connected with the second forceps arm through an elastic mechanism or an air bag; the first clamp arm and the second clamp arm can be close to each other or away from each other and form an oval shape or a spindle shape after close closing, and the air bag is used for being filled with gas or liquid. The arc-shaped forceps arms are oval or fusiform after being closed, a channel can still be reserved when a blood vessel is clamped and restrained, blocking is avoided, and the blood vessel is not prone to being damaged; by arranging the elastic mechanism or the air bag, the electrodes can move in the radial direction of the arc-shaped forceps arms, automatic adjustment or automatic adjustment attaching can be achieved, vascular injury caused by excessive extrusion is avoided, stable or moderate attaching force can be achieved, and enough attaching force is guaranteed.

This invention provides a pulsed electric field ablation system, including an ablation catheter and an ablation device, with the ablation catheter connected to the ablation device. The ablation catheter includes an operating handle, a catheter body, and a treatment head. The operating handle is located at the proximal end of the catheter body, and the treatment head is located at the distal end of the catheter body. The proximal end of the operating handle is connected to the ablation device via a tail wire. The ablation device includes a control system that can control and switch each set of electrodes for impedance measurement or ablation. By measuring voltage and current values ​​using AC signals, the impedance between electrodes is calculated. The impedance value is used to determine whether the electrodes are in good contact with the myocardial tissue. Good contact improves the effectiveness of ablation energy reaching the target point. Different electrode pairings are achieved through a switching circuit. Then, the optimal electrode combination is selected for discharge based on the judgment, forming a transverse, vertical, oblique, and intermittent discharge electric field, thus obtaining the optimal surgical ablation plan for different pulmonary vein morphologies.

A device and method for extracting material during a medical procedure, such as biopsy, drainage, surgery, ablation or any procedure involving extraction of unwanted material from an extraction site at a human or animal body. The device may also be used to deliver a material to a delivery site. The device comprises: a tubular member having a lumen and a series of radially inward projections extending into the lumen; and a shaft movably disposed within the lumen of the tubular member and having a series of radially outward protrusions extending into the lumen.

An electrode assembly that may be applied for use with medical devices. The electrode assembly includes an elongate first electrode and an elongate second electrode, each having interior cavities. The second electrode extends from a proximal end of the electrode assembly to a first distance from the distal end of the electrode assembly. The first electrode is slidably disposed within an interior cavity of the second electrode. The electrode assembly includes a tip coupled to a distal end of the first electrode. A maximum lateral or radial dimension of the tip is greater than a maximum lateral or radial dimension of the interior cavity of the second electrode to prevent the distal end of the first electrode from sliding into the interior cavity of the second electrode proximally beyond the open distal end of the second electrode.

A surgical tool for ablating anatomical tissue according to at least one embodiment of the present disclosure includes: a distal tip; a first cylindrical tube connected to the distal tip; a second cylindrical tube that at least partially overlaps the first cylindrical tube in a first direction; and a J-shaped stylet disposed in an interior of the surgical tool, the J-shaped stylet capable of being removed from the interior of the surgical tool.