Ultrasonic ablation device adapted for guidewire passage

Patent 5342292 Issued on August 30, 1994. Estimated Expiration Date:

May 24, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventors

Assignee

Baxter International Inc.

Application

No. 067246 filed on 05/24/1993

US Classes:

604/22, With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue606/169Cutter having vibratory drive means

Examiners

Primary: Rosenbaum, C. Fred
Assistant: Rafa, Michael

Attorney, Agent or Firm

Sun; Raymond

Foreign Patent References

189329 EP. 07/19/1986
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WO90/07303 WO. 07/19/1990
WO91/14401 WO. 10/19/1991

International Class

A61B 017/20

Abstract

An ultrasonic ablation device for effecting ultrasonic ablation of intravascular obstructions such as plaque or thrombi. The ultrasonic ablation device has a) an elongate catheter body, b) a wave guide or ultrasound transmission wire extending through the elongate catheter body, and c) a distal head or probe member positioned at the distal end of the catheter body. A guidewire lumen or passageway extends longitudinally through the catheter body and a guidewire aperture or passageway extends through the distal head or probe such that a guidewire may be passed through the distal head or probe and through the catheter body. Also disclosed is an improved distal head or probe which may be incorporated in any elongate ultrasonic ablation device, the improvement comprising the formation of a concavity or indentation in the distal or frontal face of the distal head or probe to improve the cavitation created thereby.

Other References

Circulation, vol. 81, No. 2, Feb. 1990, "Application of a New Phased-Array Ultrasound Imaging Catheter in the Assessment of Vascular Dimensions", pp. 660-66