05372138 is referenced by 282 patents and cites 86 patents.

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.

Title
Acousting imaging catheters and the like
Application Number
171039
Publication Number
5372138
Application Date
December 9, 1992
Publication Date
December 13, 1994
Inventor
John E Abele
Concord
MA, US
Lucien A Couvillon Jr
Concord
MA, US
Robert J Crowley
Wayland
MA, US
Agent
Fish & Richardson
Assignee
Boston Scientific Corporation
MA, US
IPC
A61F 7/12
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