PatentDOI
Catheters for imaging, sensing electrical potentials and ablating tissue
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
Citations
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Patent
Apparatus and method for accessing a body site
TL;DR: In this article, an arcuate tissue-cutting RF powered electrode was used to separate a tissue sample from tissue secured to the surface of the distal extremity of a probe member.
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System and method for assessing the formation of a lesion in tissue
Jeffrey M. Fish,Israel A. Byrd,Lynn E. Clark,Jeremy D. Dando,Christopher J. Geurkink,Harry A. Puryear,Saurav Paul +6 more
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System and Method for Image-Based Alignment of an Endoscope
TL;DR: In this paper, the tracking of the endoscope position relative to the target is performed partially or entirely by image0-based tracking by comparing features in real-time video image produced by imaging arrangement with features in the reference image.
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Methods and apparatus for intraocular brachytherapy
Richard A. Hillstead,Charles A. Larsen,Roelof Trip,Cory Anderson,Eberhard Fritz,Rainer Pintaske,John N. Hendrick,Benjamin Woodward +7 more
TL;DR: In this paper, a method for intraocular brachytherapy and an apparatus for performing the same is described, which preferably comprises a hand-held delivery device that advances a radiation source into an associated cannula or probe that is positioned adjacent the target tissue.
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RF Renal Denervation Catheter with Multiple Independent Electrodes
TL;DR: In this article, a catheter includes a multiplicity of elongated resilient members each comprising a pre-formed curve and extendable beyond the catheter, constrained to a low profile when encompassed by a removable sheath, and expand outwardly to assume a predefined shape when removed from the sheath.
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.