Abstract:
Described is a fingertip electrosurgical device useful for tissue grasping and tissue cutting, coagulating, welding and ablating in open and laparoscopic surgery applications. The electrosurgical medical device has a finger cuff assembly that attaches to the distal end of a surgeon's finger. An electrode is attached to, or is intrinsically part of, the finger cuff assembly. This electrode is connected to at least one electrically conductive wire that is adapted to transmit electric current to the electrode. The electrode may take any number of shapes depending upon the surgical procedure. Generally, two finger cuff assemblies are used in an opposable relationship to facilitate energy transfer or tissue grasping functions performed by the surgeon.
Abstract:
An electrosurgical instrument for ablating cartilage while limiting collateral damage includes a non-conducting head with a small electrically conductive surface. The head of the instrument is coupled to a shaft by a flexible portion. The flexible portion biases the electrically conductive surface towards a tissue surface. The head is pivotably coupled to the shaft such that the electrically conductive surface is oriented substantially parallel to the tissue surface as the head slides across the tissue surface. A method of performing electrosurgery includes positioning the electrically conductive surface adjacent to the tissue surface, and sliding the shaft across the tissue surface with the head pivoting such that the electrically conductive surface is oriented substantially parallel to the tissue surface.
Abstract:
A catheter for measuring electrical activity and ablating tissue is provided. The catheter comprises an elongated generally-tubular catheter body. A non-retractable electrode assembly is mounted at the distal end of the catheter body. The electrode assembly comprises a generally tubular ablation electrode formed of a material having shape-memory having a generally straight exposed region and at least one irrigation port in the exposed region through which fluid can pass from the inside to the outside of the ablation electrode. The exposed region is generally transverse to the catheter body. The electrode assembly further comprises a tip at the distal end of the electrode assembly comprising a generally ball-shaped exposed region. First and second distal mapping electrodes are mounted distal to the exposed region of the ablation electrode. At least the first distal mapping electrode, and optionally the second distal mapping electrode, is incorporated into the generally ball-shaped exposed region of the tip. The catheter further comprises an infusion tube extending through the catheter body and having a distal end in fluid communication with the proximal end of the ablation electrode.
Abstract:
An electrocautery device is disclosed. In accordance with one aspect of the invention, the electrocautery electrode/tip is provided with a hollow, conductive tube terminating at its distal end in a ball point type tip. Fluid, preferably conductive fluid, is applied to the proximal end of the hollow electrode/tip, and expelled from the distal end thereof during electrocautery. The ball point distal tip allows the distal tip to be directly applied to the tissue and nullrollednull or slid along the tissue. This allows the distal tip to be moved across the tissue without dragging or snagging on the tissue. In addition, the conductive fluid expelled from the distal tip further lubricates the distal tip as it moves across the tissue. If conductive fluid is used, the conductive fluid emanating from the electrode/tip conducts the RF electrocautery energy away from the distal tip so that it is primarily the fluid, rather than the distal tip that actually accomplishes the cauterizing of tissue. That is, the fluid serves as a nullvirtualnull electrocautery electrode. Since it is the fluid, rather than the distal tip that cauterizes, coagulates and ablates, no burns or perforations are made to the tissue, reducing the amount of debris at the site. Also, the flow of fluid through the electrode/tip tends to keep the distal tip clean and cool.
Abstract:
An electrosurgical device is provided having at least one elastomeric seal capable of providing bio-contamination and dielectric protection by inhibiting the ingress of fluids and contaminants through the nose and actuator areas. The elastomeric seal is manufactured from a thermoplastic elastomer or resin which while in liquid form is placed within a mold. A housing section having the main circuit components and mechanisms of the electrosurgical device is then placed within the mold. Once the elastomer cures, the elastomeric seal seals the components and mechanisms within the housing partial-section. The elastomeric seal defines a flexible first opening at a distal end of the electrosurgical device to accommodate varying diameters of electrodes or blades connected to the nose area of the electrosurgical device. An actuator seal is also provided on the actuator area of the electrosurgical device to prevent fluids and contaminants from entering the electrosurgical device through the actuator area. Two buttons are insert molded within the actuator seal and are operatively associated with a self-cleaning switching mechanism within the housing section to operate the electrosurgical device between a cutting and coagulating mode. The actuator seal is also manufactured from a thermoplastic elastomer or resin. The self-cleaning switching mechanism includes a switch contact plate having pair of movable contacts having contact faces. Each movable contact corresponds to a stationary contact positioned within a circuit mold. As the actuator seal is depressed, contact faces of the movable and stationary contacts slide along each other to clean the contacts from non-conductive corrosion and contaminants. The device is further provided with a plug connector having. a counting mechanism for counting the number of times the device is plugged into an electric generator. A disable mechanism is included at the proximal end of the plug connector to disable the device after a pre-determined number of operations.
Abstract:
A high-frequency current forceps includes a pair of clamp pieces having a pair of clamp faces facing each other, and the pair of clamp faces is formed on metal such as stainless steel which is electrically insulated by covering the whole surface with an insulation film. One of the clamp faces is formed in a planar shape, while another clamp face is formed in a chevron shape having a ridge portion extending along a length direction of the clamp piece. A linear electrode which is not covered with the insulation film is provided on the ridge portion on the clamp face.
Abstract:
The present invention relates to devices and methods that enhance the accuracy of lesion excision, through severing, capturing and removal of a lesion within soft tissue. Furthermore, the present invention relates to devices and methods for the excision of breast tissue based on the internal anatomy of the breast gland. A tissue severing device generally comprises a guide having at least one lumen and a cutting tool contained within the lumen. The cutting tool is capable of extending from the lumen and forming an adjustable cutting loop. The cutting loop may be widened or narrowed and the angle between the loop extension axis and the guide axis may be varied. Optional tissue marker and tissue collector may additionally be provided. A method for excising a mass of tissue from a patient is also provided. The device and method are particularly useful for excising a lesion from a human breast, e.g., through the excision and removal of a part of a breast lobe, an entire breast lobe or a breast lobe plus surrounding adjacent tissue.
Abstract:
The invention relates to one or more catheterization methods of altering conduction properties along pathways in the heart, and in vessels in conductive communication with the heart, and is particularly related to methods of ablative catheter treatment of atrial fibrillation and arrhythmias of accessory pathways.
Abstract:
A deflectable device, such as a catheter, is provided that includes a hinge that enhances the ability of the device to deflect or bend within a predetermined plane. The catheter comprises an elongated tubular catheter body having proximal and distal ends and at least one lumen extending therethrough. A distal segment is provided distal to the distal end of the catheter body. A tubular hinge is provided between the distal end of the catheter body and the proximal end of the distal segment. The hinge has an axis and at least one lumen extending therethrough. The tube includes at least one slot, and preferably a plurality of slots, extending part of the way through the hinge generally transverse to the axis of the hinge.
Abstract:
A high-frequency knife having a flexible sheath, an operation member, an electrode part, a handled operation section and a connector part. The electrode part is provided with a rod electrode part extending in an axial direction of a flexible sheath, and a plate electrode part. Three corner portions are provided on an external peripheral portion of the plate electrode part.