PatentDOI
Acoustic imaging catheter and the like
TLDR
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.Abstract:
Acoustic imaging balloon catheters formed by a disposable liquid-confining sheath supporting a high fidelity, flexible drive shaft which carries on its end an ultrasound transducer and includes an inflatable dilatation balloon. The shaft and transducer rotate with sufficient speed and fidelity to produce real time images on a T.V. screen. In preferred embodiments, special features that contribute to the high fidelity of the drive shaft include the particular multi-filar construction of concentric, oppositely wound, interfering coils, a pre-loaded torque condition on the coils enhancing their interfering contact, and dynamic loading of the distal end of the probe, preferably with viscous drag. The coil rotating in the presence of liquid in the sheath is used to produce a desirable pressure in the region of the transducer. Numerous selectable catheter sheaths are shown including a sheath with an integral acoustically-transparent window, sheaths with end extensions that aid in positioning, a liquid injection-producing sheath, a sheath having its window section under tension employing an axially loaded bearing, a sheath carrying a dilatation or positioning balloon over the transducer, a sheath carrying a distal rotating surgical tool and a sheath used in conjunction with a side-viewing trocar.read more
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PatentDOI
Catheters for imaging, sensing electrical potentials and ablating tissue
TL;DR: 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.
Patent
Intravascular imaging apparatus and methods for use and manufacture
Wayne Sieben,Mark J. Whalen +1 more
TL;DR: In this article, a transducer is used to scan the distal coronary vessels with ultrasonic pulses, and a signal processor is connected to a proximal end of the elongate member and to the transducers for generating and receiving pulses.
Patent
Circumferential ablation device assembly
TL;DR: In this article, a circumferential ablation device assembly is presented which is adapted to forming a conduction block in a pulmonary vein, which circumscribes the pulmonary vein lumen and transects the electrical conductivity of the vein against conduction along its longitudinal axis.
Patent
Magnetic determination of position and orientation
TL;DR: In this article, a magnetic position and orientation determining system using magnetic fields, desirably comprising uniform fields from Helmholtz coils (34, 36, 38) positioned on opposite sides of a sensing volume and gradient fields generated by the same coils, is presented.
Patent
Multi-services application gateway and system employing the same
Amir Ansari,George A. Cowgill,Ramprakash Masina,Jude P. Ramayya,Alvin R. McQuarters,Atousa Raissyan,Leon E. Nicholls +6 more
TL;DR: In this article, an intelligent gateway device is provided at a premise (home or business) for providing and managing application services associated with use and support of a plurality of digital endpoint devices associated with the premises.
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Patent
Reinforced balloon dilatation catheter with slitted exchange sleeve and method
Michael Horzewski,Paul G. Yock +1 more
TL;DR: In this article, a balloon dilatation catheter with a guide wire and a sleeve is used to assist the insertion of a guiding catheter into the balloon's distal extremity.
Patent
Angioplasty apparatus facilitating rapid exchanges
TL;DR: In this paper, a guiding catheter is inserted into the vessel of a patient, which consists of a flexible elongate member and a sleeve carried by the member and extending from a region near the distal extremity of the member to a region between the proximal and proximal extremities of the extension.
Patent
Atherectomy system with a guide-wire
TL;DR: An atherectomy system for coring and removing an obstruction material from within a patient's vessel is described in this paper, with a flexible guide-wire defining voids for containing obstruction material and defining a diametrical envelope.
PatentDOI
Catheter apparatus, system and method for intravascular two-dimensional ultrasonography
TL;DR: In this paper, an ultrasonic transducer is carried by the distal end of a catheter adapted for insertion into a vessel, and either the transducers or another element is rotated and/or translated relative to the catheter to image different portions of the vessel.
Patent
Intravascular catheter having combined imaging abrasion head.
TL;DR: In this paper, a front-end and side-on intravascular catheters are described that comprise an abrasive head contained substantially within a housing, and aspiration means and flushing means are connected to the region of grinding to remove dislodged debris.