92results about "Instrument probes" patented technology

Methods and apparatus are disclosed for forming annular lesions in tissue. The methods include introduction of an optical apparatus proximate to a tissue site, via, for example, a catheter. The optical apparatus includes a pattern-forming optical wave guide in communication with a light transmitting optical fiber. Energy is transmitted through the optical fiber, such that radiation is propagated through the optical fiber and the wave guide projects an annular light pattern, e.g., a circle or a halo.

The present invention provides devices and methods for the treatment of atrial fibrillation. In one embodiment a deflectable sheath catheter includes an elongate catheter body having proximal and distal ends, the distal end having a distal tip region that includes a plurality of flexible segments with varying degrees of stiffness. A handle portion can be located at the proximal end of the catheter body to provide a steering mechanism that causes the distal tip region to deflect according to a compound curve.

Ablation methods and instruments are disclosed for creating lesions in tissue, especially cardiac tissue for treatment of arrhythmias and the like. Percutaneous ablation instruments in the form of coaxial catheter bodies are disclosed having at least one central lumen therein and having one or more balloon structures at the distal end region of the instrument. The instruments include an energy emitting element which is independently positionable within the lumen of the instrument and adapted to project radiant energy through a transmissive region of a projection balloon to a target tissue site. The instrument can optionally include at least one expandable anchor balloon disposed about, or incorporated into an inner catheter body designed to be slid over a guidewire. This anchor balloon can serve to position the device within a lumen, such as a pulmonary vein. A projection balloon structure is also disclosed that can be slid over the first (anchor balloon) catheter body and inflated within the heart, to define a staging from which to project radiant energy. An ablative fluid can also be employed outside of the instrument (e.g., between the balloon and the target region) to ensure efficient transmission of the radiant energy when the instrument is deployed. In another aspect of the invention, generally applicable to a wide range of cardiac ablation instruments, mechanisms are disclosed for determining whether the instrument has been properly seated within the heart, e.g., whether the device is in contact with a pulmonary vein and / or the atrial surface, in order to form a lesion by heating, cooling or projecting energy. This contact-sensing feature can be implemented by an illumination source situated within the instrument and an optical detector that monitors the level of reflected light. Measurements of the reflected light (or wavelengths of the reflected light) can thus be used to determine whether contact has been achieved and whether such contact is continuous over a desired ablation path.

An electrosurgical instrument for spinal procedures comprises a generally scoop-shaped cup whose periphery is electrically active and is capable of applying RF electrosurgical currents to spinal tissue. The active electrode may comprise an exposed bare wire at the leading edge of the cup. A conduit in a handle section can convey suction to the cup. A tissue clearing member is pivotably mounted on or inside the cup and can be manipulated via a lever on the handle to help dislodge tissue. The tissue clearing member may be a radially-extending vane for rotation in the plane of the cup edge. The tissue clearing member may also be made electrically active thus selectively providing unipolar or bipolar operation.

The present invention provides an apparatus for performing a minimally-invasive procedure. The apparatus comprising: a shaft having a distal end and a proximal end; a monopolar knife assembly attachedto the distal end of the shaft, the monopolar knife assembly comprising a knife; a handle attached to the proximal end of the shaft; wherein the shaft comprises a flexible portion and an articulatingportion, wherein the flexible portion extends distally from the handle and the articulating portion extends distally from the flexible portion; at least one articulation cable extends from the handleto the articulating portion, such that when tension is applied to the at least one articulation cable, the articulating portion deflects; an actuation element extends through the shaft from the handle to the knife, such that when the actuation element is moved, the knife is moved; and the actuation element transmits electrical power from the handle to the knife.

The invention discloses an electrocoagulation forcep system convenient to clean. The system comprises a forcep body and a base, wherein the forcep body comprises forcep tips and forcep poles. The system is characterized in that a semi-open absorption groove is formed in each forcep pole, the front end of each absorption groove is connected with an absorption channel in the corresponding forcep tip, and an insertion port is formed in an outlet in the rear end of each absorption groove. The system further comprises sealing devices matched with the absorption grooves, wherein the cross section of each absorption groove is semi-circular. The semi-open absorption grooves are formed in the forcep body, the sealing devices are tightly pressed on the absorption grooves when the system is used, so that the absorption grooves is sealed, when hematocele needs to be removed, all that is required is to connect the insertion ports with an absorption machine in an operation room, and then operation can be performed; after the system is not used, the sealing devices are taken off, and the absorption grooves are washed clean. The electrocoagulation forcep system is simple in principle, can perform hemostasis and absorption work simultaneously and is convenient to wash.