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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Method and system for controlling output of RF medical generator
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References
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Patent
Drug delivery and dilatation catheter
TL;DR: An improved drug delivery catheter was proposed in this paper for use in the prevention of restenosis of a dilated vascular region, and/or for the delivery of a medication to a preselected vascular site.
Journal ArticleDOI
Physics and engineering of transcatheter cardiac tissue ablation.
Boaz Avitall,Miqdad Khan,David Krum,John Hare,Cynthia Lessila,Anwer Dhala,Sanjay Deshpande,Mohammad Jazayeri,Jasbir Sra,Masood Akhtar +9 more
TL;DR: An overview of the physical, scientific and technical aspects of cardiac ablation performed with the methods currently available and a summary of the limitations of each method and expected future technologic developments in this growing field are provided.
Patent
Ultrasound imaging balloon catheter
TL;DR: An ultrasound imaging balloon catheter for imaging near a wall of a cavity or passageway is described in this article, which includes an elongated catheter having a primary lumen with a distal opening enveloped by the balloon.
Journal ArticleDOI
Feasibility of Radiofrequency Powered, Thermal Balloon Ablation of Atrioventricular Bypass Tracts Via the Coronary Sinus: In Vivo Canine Studies
Daniel B. Fram,Ellison Berns,Thomas Aretz,Linda D. Gillam,Joseph S. Mikan,David D. Waters,Raymond G. McKay +6 more
TL;DR: It is concluded that radiofrequency balloon heating via the coronary sinus can create thermal lesions in the atrioventricular sulcus of dogs that may be of sufficient size to ablate accessory left‐sided pathways in humans.
Patent
Ultrasound examination system
TL;DR: In this article, an ultrasound transducer rotatably mounted on the tip end of a flexible insert member and a rotation transmitting means passed through the insert member to rotate the ultrasound transducers is presented.