摘要:
A method for treating pelvic tumors, such as uterine leiomyomata, includes inserting an ablation apparatus into a pelvic region and positioning the ablation apparatus either proximate or into a pelvic tumor. The method further includes using a laparoscope and an imaging device, such as an ultrasound machine, to confirm the location of the pelvic tumor and placement of the ablation apparatus. Various ablation apparatuses may be used, including those with multiple needles or deployable arms that are inserted into the pelvic tumor and those without arms. The method further includes delivering electromagnetic energy or other energy through the ablation apparatus to the pelvic tumor to ablate the tumor. A surgical system for ablating pelvic tumors is also provided.
摘要:
A tissue ablation system including numerous components and methods is described herein for encircling target tissue and generating tissue ablation volumes in various biological tissues. The biological tissue includes tissue of a variety of organs of the human body including the liver, spleen, kidney, lung, breast and other organs, but is not so limited. The tissue ablation device comprises an energy source and at least one trocar coupled to the energy source, the trocar having a body, a proximal end, and a distal end. The trocar carries an electrode array that comprises a plurality of electrodes, each electrode of the plurality of electrodes is configured to extend from the trocar when moved from a retracted state to a deployed state, and to have at least one radius of curvature in the deployed state so that the electrode array forms a series of shaped electrodes in the deployed state.
摘要:
An apparatus and method are provided for precisely isolating a target lesion in a patient's body tissue, resulting in a high likelihood of "clean" margins about the lesion when it is removed for diagnosis and/or therapy. This approach advantageously will often result in the ability to both diagnose and treat a malignant lesion with only a single percutaneous procedure, with no follow-up percutaneous or surgical procedure required, while minimizing the risk of migration of possible cancerous cells from the lesion to surrounding tissue or the bloodstream. In particular, the apparatus comprises a biopsy instrument having a distal end adapted for entry into the patient's body, a longitudinal shaft, and a cutting element disposed along the shaft. The cutting element is actuatable between a radially retracted position and a radially extended position. Advantageously, the instrument is rotatable about its axis in the radially extended position to isolate a desired tissue specimen from surrounding tissue by defining a peripheral margin about the tissue specimen. Once the tissue specimen is isolated, it may be segmented by further manipulation of the cutting element, after which the tissue segments are preferably individually removed from the patient's body through a cannula or the like. Alternatively, the specimen may be encapsulated and removed as an intact piece.
摘要:
An apparatus for delivering energy to a target site within bone includes a hollow needle extending from a handle that terminates in a tissue piercing distal tip. A drill within a lumen of the needle is extendable beyond the distal tip, and includes a cutting element and an electrically conductive region. An RF generator may be coupled to the drill for delivering energy to the electrically conductive region, and a driver or actuator may be coupled to the drill for rotating and/or advancing the drill axially. During use, the needle is inserted through a patient's skin to a hard tissue structure, e.g., a bone, including a target site therein, e.g., a tumor. The drill is advanced from the needle, a hole is drilled into the bone until the drill reaches the tumor, and electrical energy is delivered via the electrically conductive region to destroy the tumor.
摘要:
An expandable tip cannula system, comprising: a hollow cannula shaft having a proximal end and a distal end; and an expandable tip mounted at the distal end of the hollow cannula shaft, the expandable tip comprising a plurality of generally-triangular shaped petals held together in a radially-inwardly tapered arrangement between adjacent petals, each petal comprising a nerve sensing electrode disposed therein.
摘要:
The present invention relates to an apparatus for use with a power source (11) to provide therapeutic cauterization of a known volume of tissue, the apparatus comprising an energy applicator (21) having unique electrode parameters adapted to provide cauterization of a predetermined volume of tissue, the energy applicator (21) comprising a shaft (40) having a longitudinal axis, a lumen (62) and a distal end having a sharpened edge (63) to facilitate introduction and advancement of the energy applicator into the tissue; an extractor (131) disposed within the lumen (62) , the extractor having a sharpened distal end (63) and a side-facing cavity adapted to accept a tissue sample, the extractor movable from a first position wherein the side-facing cavity extends beyond the distal end of the shaft to accept a tissue sample, and a second position wherein the side facing cavity is retracted within the lumen to sever the tissue sample against the sharpened edge (41) of the shaft; first (28) and second (29) electrodes disposed on the shaft and spaced apart along the longitudinal axis, the distance between the first (28) and second (29) electrodes determining a size and shape of a zone of cauterization produced in the tissue by the energy applicator (21) ; and an electrically insulating material (31) disposed between the first (28) and second (29) electrodes to electrically insulate the first electrode (28) from the second electrode (29) ; a handle (22) that couples the energy applicator (21) to the power source (11) , the handle including control circuitry (39) adapted to control supply (22) of a current between the first (28) and second (29) electrodes, the control circuitry further comprises a current detector adapted to measure a current level between the first and second electrodes; and circuitry for terminating supply of power to the energy applicator when the current level falls a predetermined amount.
摘要:
A device for accessing and for isolating a desired site within a patient's body, and for obtaining a body of tissue from a patient at the site that includes an electrosurgical cutting electrode near the distal tip of a shaft, and anchoring mechanism and an electrosurgical side-cutting device. Methods are provided for accessing a target site within a patient's body, anchoring a body tissue at the site, and isolating the body of tissue at the site. The method may be performed for a surgical biopsy or lumpectomy at the target site within a patient's body.