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80results about How to "Limited penetration" patented technology

Expandable catheter system for peri-ostial injection and muscle and nerve fiber ablation

ActiveUS20120271277A1Improve control and treatmentTime efficient and safeElectrocardiographySurgical needlesCapital equipmentLeft atrium
At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall. The present invention also has an important application to ablate tissue around the ostium of one or both renal arteries, for the ablation of the sympathetic nerve fibers and/or other afferent or efferent nerves going to or from each kidney in order to treat hypertension.
Owner:ABLATIVE SOLUTIONS INC

Expandable catheter system for peri-ostial injection and muscle and nerve fiber ablation

ActiveUS9237925B2Improve control and treatmentTime efficient and safeElectrocardiographySurgical needlesFiberCapital equipment
At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall. The present invention also has an important application to ablate tissue around the ostium of one or both renal arteries, for the ablation of the sympathetic nerve fibers and / or other afferent or efferent nerves going to or from each kidney in order to treat hypertension.
Owner:ABLATIVE SOLUTIONS INC

Sensor array for detecting the movement of a positioning element moved back and forth using an actuator

The invention relates to a sensor array for detecting travel of a movable member, especially a positioning element that is movable using an actuator. Said sensor array comprises a stationary coil arrangement (18) that is provided with an active coil (18.1) and at least one passive coil (26.1, 26.2) located a distance therefrom. The coil arrangement (18) is connected to a power supply unit (30) and a signal-detecting device (29). The inventive sensor array further comprises an axially movable rod-shaped sensor part (17) that is made of a preferably magnetizable material, is connected to the positioning element which is movable fore and aft in an axial direction, and is provided with at least one short circuit element (23, 23.0). Said at least one short circuit element (23, 23.0) is made of an electrically conducting material having low ohmic resistance, is delimited by a final edge (23.1, 23.2) in the longitudinal direction, respectively, and has a dimension in the direction of movement, which is calculated such that one final edge (23.1, 23.2, 23.3) of the at least one short circuit element (23) is enclosed by the active coil (18.1) in at least one final position (I, II) defined by the predefined length of stroke (h) while another final edge (23.1, 23.2, 23.3) of the at least one short circuit element (23, 23.0) is at least partly embraced by one of the at least one passive coils (26.1, 26.2).
Owner:FEV MOTORENTECHN GMBH
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