46results about How to "Efficient ablation" patented technology

A medical probe assembly, tissue treatment system, and method are provided for ablating tissue. The probe assembly comprises an elongated member and electrode elements mechanically coupled to the distal end of the elongated member. The electrode elements are configurable as two bipolar electrode pairs with a common electrode element. At least one of the electrode elements comprises a plurality of electrodes (such as, e.g., needle electrodes) radially extendable from the elongated member. An ablation source, such as a radio frequency source, can be connected to the probe assembly in order to convey ablation energy to the electrode pairs, either simultaneously or sequentially.

A radio-frequency based catheter system and method for ablating biological tissues within the body vessel of a patient comprises a radio-frequency (“RF”) generator for selectively generating a high frequency RF energy signal in a deployable catheter having an RF transmission line, an RF antenna mounted on the distal portion of the catheter, and a temperature sensor also mounted on a distal portion of the catheter for detecting temperature adjacent an ablation site. A control system adjusts the RF energy signal so that the detected temperature is at or close to a selected temperature setting or within a selected temperature range.

A method for treating tumors, such as uterine leiomyomata, includes inserting an ablation apparatus into a pelvic region and positioning the ablation apparatus 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. The method further includes delivering electromagnetic energy or other energy through the ablation apparatus to the pelvic tumor to directly ablate the tumor. A surgical system for ablating pelvic tumors is also provided.

A method for biological tissue ablation includes shaping a shapeable RF antenna to accommodate the contour of a body vessel adjacent a biological tissue load; generating a train of radio frequency (RF) energy pulses at an output frequency for transmission in a transmission line to the shapeable RF antenna adjacent the biological tissue load; sensing a reflected signal and a forward signal of the RF energy pulses; and adjusting output frequency of the RF energy pulses to effect a substantial match of transmission line impedance with shapeable RF antenna and biological tissue load impedance.

A method for treating tumors, such as uterine leiomyomata, includes inserting an ablation apparatus into a pelvic region and positioning the ablation apparatus 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. The method further includes delivering electromagnetic energy or other energy through the ablation apparatus to the pelvic tumor to directly ablate the tumor. A surgical system for ablating pelvic tumors is also provided.

Devices and methods for ablating a selected tissue volume, such as for ablating tumor, are disclosed. In certain embodiments, the ablation devices include a low-conductivity, tissue-piercing tip, an adjustment mechanism for selectively adjusting the length of an exposed portion of the electrode, for producing ablation volumes of desired geometry. In other embodiment, the methods allow the adjustment of the length of the exposed electrode portion be carried out by moving an insulative sleeve along the electrode.

The present invention provides devices and systems, as well as methods, of electric field delivery and ablation (e.g., non-thermal ablation) of target tissues, including cancerous cells and solid tumors. A method of the present invention can include applying an alternating current to a target tissue and removing ablated or liquefied tissue from the target tissue region.

The present invention provides systems, devices and related methods for applying electric fields for cancerous cell destruction and tissue ablation. A method can include advancing an ablation probe into a patient; deploying a guide from the delivery member along a guide tissue penetration path, deploying an electrode from the guide along an electrode tissue penetration path, and establishing current flow within the target tissue.

A catheter for delivery of sclerosant to a tubular member or vein of the body to cause ablation. The catheter has one or more balloons located near the distal end to enhance effectiveness of the sclerosant and prevent its delivery to the deep venous system. The catheter has an orifice located near the distal end of the catheter to direct the sclerosant into the vessel and one or more effluent openings to provide for removal of the sclerosant fluid. A heating member such as an electrical resistance element, a Laser probe, or an RF electrode located within the catheter lumen or on the outside of the catheter shaft heats the sclerosant fluid to improve its ablation effectiveness.

A radio-frequency based catheter system and method for ablating biological tissues within the body vessel of a patient comprises a radio-frequency (“RF”) generator for selectively generating a high frequency RF energy signal in a deployable catheter having an RF transmission line, an RF antenna mounted on the distal portion of the catheter, and a temperature sensor also mounted on a distal portion of the catheter for detecting temperature adjacent an ablation site. A control system adjusts the RF energy signal so that the detected temperature is at or close to a selected temperature setting or within a selected temperature range.

A system and method for medical treatment of tissue using ultrasound. The system comprises a probe having an array of transducer elements, an ultrasound waveform generator adapted to generate at least one electrical ultrasound signal, and a plurality of phase controls, each coupled to the ultrasound waveform generator and adapted to generate from the electrical ultrasound signal a phase-shifted drive signal that is coupled to an associated transducer element. The drive signal is effective to control grating lobe foci emitted by the array. The method employs the system.

An apparatus and process using a high-power, short-pulsed thulium laser to output infrared laser pulses delivered through an optical fiber, for cutting and ablating biological tissue. In some embodiments, the pulse length is shortened sufficiently to keep inside the stress-confined ablation region of operation. In some embodiments, the pulse is shortened to near the stress-confined ablation region of operation, while being slightly in the thermal-constrained region of operation. In some embodiments, the laser is coupled to a small low —OH optical fiber (˜100 μm diameter). In some embodiments, the device has a pulse duration of about 100 ns for efficient ablation; however in some embodiments, this parameter is adjustable.

An apparatus and method for an ultrasonic medical device with a variable frequency drive for ablating a biological material comprises an ultrasonic probe having a proximal end, a distal end and a longitudinal axis therebetween; a transducer that drives the ultrasonic probe over a variable frequency range, creating a transverse ultrasonic vibration along at least a portion of the longitudinal axis of the ultrasonic probe; a coupling engaging the proximal end of the ultrasonic probe to a distal end of the transducer; and an ultrasonic energy source engaged to the transducer that produces an ultrasonic energy, wherein driving the ultrasonic probe over the variable frequency range allows for the ultrasonic energy to propagate around a bend of the ultrasonic probe to ablate the biological material in communication with the ultrasonic probe.

An ablation device is provided. Electrodes are supported on counter rotating rollers. The rollers can be rotated to provide a desired spacing between the two electrodes. The rollers and electrodes can be associated with a side opening in a housing supported at a distal end of a flexible, elongated overtube sized to receive an endoscope.

The present invention provides devices and systems, as well as methods, of electric field delivery and non-thermal or selective ablation of target tissue regions, including selective ablation of cancerous cells and solid tumors. A method of the present invention includes delivering an electric field to a tissue, including positioning an electrode within a target tissue region comprising cancerous cells, and applying an alternating electrical current to the target tissue so as to non-thermally ablate cancerous cells of the target tissue region around the electrodes.

An intraocular lens adapted for deployment within a lens capsule. At least part of a lens surface of the intraocular lens constitutes a cell inducing region in which are directly formed a multitude of microgrooves. The microgrooves take a form of minute linear grooves and lands of depth dimension between 0.01 and 1.0 μm and width dimension between 0.1 and 2.0 μm extending with prescribed length in a circumferential direction on the lens surface. The minute linear grooves and lands are formed with a chained pattern connected in the circumferential direction of the lens surface and with a periodic pattern arrayed periodically in a diametrical direction so that the minute linear grooves and lands are formed without intervening spaces throughout the entire cell inducing region and impart visible light transmittance of 60% or above to the cell inducing region.

Headache treatment methods are described and include providing an energy delivery device; locating a secondary or higher-order branch of a postganglionic nerve that provides innervation for a patient's head, by identifying a target region of the patient's head that includes the nerve branch; positioning, within the target region, a portion of the energy delivery device; and applying, from the positioned portion of the energy delivery device to the target region, an amount of energy effective to result in a stimulation activity of the nerve branch; and, after observing the stimulated nerve branch activity, delivering, from the energy delivery device to the nerve branch, energy in an amount effective to reduce a headache severity in the patient.

Presbyopia is treated by a system using various lasers to remove a portion of the scleral tissue and increase the accommodation of the presbyopic patient's eye. Stable accommodation is achieved by the filling of the sub-conjunctiva tissue to the laser-ablated scleral areas. The proposed laser wavelength ranges from ultraviolet to infrared of (0.15-0.36) microns, (0.5-1.4) microns and (0.9-3.2) microns. Both scanning and fiber delivered systems are proposed to generate the ablation patterns. Laser ablation of the sclera may be conducted with or without opening the conjunctiva layer.

A method for making conductive traces and interconnects on a surface of a substrate includes, for an embodiment, forming a dielectric or polymer layer on the surface of the substrate, forming a seed layer of an electrically conductive material on the dielectric or polymer layer, patterning a photoresist on the seed layer, forming the conductive traces on the patterned photoresist and seed layer, removing the photoresist from the substrate, and irradiating the surface of the substrate with a fluence of laser light effective to ablate the seed layer from areas of the substrate surface exclusive of the conductive traces.

A balloon-equipped ablation catheter used to efficiently cauterize a cardiac wall. A guide wire for a balloon-equipped ablation catheter, provided with a bending section, wherein the bending section has a bending region provided in that region of the guide wire which has a length of at least 20 mm in the longitudinal direction of the guide wire and having bending rigidity in the range of 570 to 3740 N·mm2, the guide wire bending angle which is the angle formed between the tangent line at the start point of the bending region and the tangent line at the end point of the bending region, said tangent lines intersecting each other, and measured in the direction of the bend from the tangent line at the start point of the bending region is in the range of 45 to 180 degrees, and the balloon bending angle which is the angle measured relative to the longitudinal direction when the guide wire is inserted in a lumen, which communicates from the distal end to the proximal end in the longitudinal direction of a shaft for the balloon-equipped ablation catheter, and the bending region is located right below the balloon is in the range of 30 to 90 degrees.

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.

A surgical system that ablates soft tissue. The system may include a fiber laser oscillator as the gain medium that emits electromagnetic radiation. The system may process the electromagnetic radiation, and direct the electromagnetic radiation on to the soft tissue to be ablated. Due at least in part to the nature of the electromagnetic radiation emitted by the fiber laser oscillator, the system may provide various enhancements, such as a higher power conversion efficiency, a longer lifetime, less heat dissipation, a more compact design, and / or other enhancements, for example. The system may also generate electromagnetic radiation with a relatively high beam quality. This may reduce beam divergence and beam spot size on targeted soft tissue, thereby enhancing power density in the electromagnetic radiation guided to the soft tissue. This enhanced power density may facilitate effective ablation.

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.

The present invention relates to a method of suppressing bone marrow (BM) and treating conditions that arise in or near bone such as cancer, myeloproliferative diseases, autoimmune diseases, infectious diseases, metabolic diseases or genetic diseases, with compositions having as their active ingredient a radionuclide complexed with a chelating agent such as macrocyclic aminophosphonic acid.

The invention discloses a snow removing system, and belongs to the field of photovoltaics. Sunny side supports of an agriculture greenhouse are lower than night side supports of the agriculture greenhouse, and photovoltaic components located at the top of the photovoltaic agriculture greenhouse form a slope which inclines downwards; according to the system, a transverse main air pipe is arranged on the photovoltaic agriculture greenhouse in the length direction, the transverse main air pipe is provided with multiple air outlet connecting holes, the air outlet connecting holes are connected with one ends of longitudinal flexible pipes which are arranged along the slope of the photovoltaic agriculture greenhouse, the other ends of the longitudinal flexible pipes are blocked, the two sides of each longitudinal flexible pipe are provided with air outlets at certain intervals. According to the snow removing system, no damage to the photovoltaic components can be caused, the power generation of the components can be recovered in a short time, unsafe factors existing in artificial snow removing can be avoided, and the power generation capacity in winter can be improved.

An electrosurgical instrument having a radiating tip with enhanced flexibility. In a first aspect, this is achieved by shaping the dielectric material in the radiating tip to facilitate bending of the radiating tip. In a second aspect, this is achieved by forming a dielectric body and outer sheath of the radiating tip as separate parts, to enable movement and flexure between the parts. By improving the flexibility of the radiating tip, maneuverability of the electrosurgical instrument may be improved.