PatentDOI
Catheters for imaging, sensing electrical potentials and ablating tissue
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TLDR
In this paper, an acoustic imaging system for use within a heart has a catheter, an ultrasound device, and an electrode mounted on the catheter to create an ultrasonic image, and the electrode is arranged for electrical contact with the internal structure.Abstract:
An acoustic imaging system for use within a heart has a catheter, an ultrasound device incorporated into the catheter, and an electrode mounted on the catheter. The ultrasound device directs ultrasonic signals toward an internal structure in the heart to create an ultrasonic image, and the electrode is arranged for electrical contact with the internal structure. A chemical ablation device mounted on the catheter ablates at least a portion of the internal structure by delivery of fluid to the internal structure. The ablation device includes a material that vibrates in response to electrical excitation, the ablation being at least assisted by vibration of the material. The ablation device may alternatively be a transducer incorporated into the catheter, arranged to convert electrical signals into radiation and to direct the radiation toward the internal structure. The electrode may be a sonolucent structure incorporated into the catheter, through which the ultrasound device is arranged to direct signals. An acoustic marker mounted on the catheter emits a sonic wave when electrically excited. A central processing unit creates a graphical representation of the internal structure, and super-imposes items of data onto the graphical representation at locations that represent the respective plurality of locations within the internal structure corresponding to the plurality of items of data. A display system displays the graphical representation onto which the plurality of items of data are super-imposed.read more
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PatentDOI
Catheter including ultrasound transducer with emissions attenuation
Axel F. Brisken,N. Parker Willis +1 more
TL;DR: In this paper, a catheter including an elongated body member, an ultrasound transducer located on the body member and dampening means for forming an ultrasound dampening region adjacent to a portion of the ultrasound transducers, is disclosed.
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Methods and apparatus for intravascularly-induced neuromodulation
TL;DR: In this paper, an inflatable balloon configured to increase impedance within a patient's vasculature was used to modulate a neural fiber that contributes to renal function, and the balloon was deployed into contact with the vessel wall at a treatment site within the patient's vessel.
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Systems and methods for providing radiation therapy and catheter guides
Tim Fox,Ian R. Crocker +1 more
TL;DR: In this paper, a system and method for the prevention of restenosis using a source of radiation to treat the blood vessel is described. Butts et al. used an intravascular ultrasound imaging system (12) to generate images of a treatment volume from within the vessel, and a computer based treatment planner (20) acquired the images from the imaging system and reconstructed a three-dimensional image of the treatment volume.
PatentDOI
Resolution optical and ultrasound devices for imaging and treatment of body lumens
TL;DR: A rotationally vibrating imaging catheter as discussed by the authors is a catheter with an array of ultrasound or optical transducers and an actuator along with signal processing, display, and power subsystems.
References
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Journal ArticleDOI
Catheter ablation of accessory atrioventricular pathways (Wolff-Parkinson-White syndrome) by radiofrequency current.
Warren M. Jackman,Xunzhang Wang,Karen J. Friday,C A Roman,Kriegh Moulton,Karen J. Beckman,J H McClelland,Nicholas Twidale,H A Hazlitt,M I Prior +9 more
TL;DR: Radiofrequency current is highly effective in ablating accessory pathways, with low morbidity and no mortality, according to this study.
Patent
Apparatus and method for treating cardiac arrhythmias.
TL;DR: In this article, a method and apparatus for treating cardiac arrhythmias comprising an instrument for mapping ventricular tachycardia, is disclosed, which comprises obtaining a perspective image of the organ or structure to be mapped, advancing one or more catheters having distal tips to sites adjacent to or within the organ and structure, sensing the location of each catheter's distal tip using a non-ionizing field, processing the sensed information to create one or multiple data points, superimposing the data points on the perspective image, and ablating a portion of the
PatentDOI
Acoustic imaging catheter and the like
TL;DR: In this article, the authors presented a set of selectable catheter sheaths, including a sheath with an integral acoustically-transparent window, sheaths with end extensions that aid in positioning and a liquid injection-producing sheath.
Patent
Electro-coagulation and ablation and other electrotherapeutic treatments of body tissue
TL;DR: A catheter includes a flexible elongated catheter body that defines a needle receiving, or probe-receiving, lumen, a retractable tissue-penetrable needle or probe, and an electrode mounted on the distal portion of the catheter.
Patent
Endometrial ablation apparatus and method
TL;DR: In this paper, an endometrial ablation method comprising passing sufficient RF current having a frequency of from 250 kHz to about 100 MHz through substantially the entire surface of the endometrium was presented.