Apparatus for enlarging a vessel or clearing obstructive tissue

Details Apparatus for enlarging a vessel or clearing obstructive tissue Apparatus for enlarging a vessel or clearing obstructive tissue

1989-02-15

1992-01-28

Hafer, Robert A.

Surgery

Instruments

Internal pressure applicator

606194, 604 97, 604100, A61M 2902

Patent

active

050840606

ABSTRACT:
An apparatus for clearing obstructive tissue from a body vessel or enlarging the lumen of the vessel comprises a balloon catheter which is insertable into the vessel of a patient to position the balloon in the area to be enlarged or against the obstructive tissue. A syringe is provided to incrementally inflate the balloon with a reasonably incompressible fluid to apply pressure against the inside of the vessel for opening the vessel. A pressure transducer senses fluid pressure in the balloon and an interval timer is used to monitor the rate of change in this fluid pressure. The rates of change in fluid pressure between the incremental inflations are monitored to determine vessel compliance, to determine when the stenosis is cleared, and to indicate when the vessel is stretched to, or near, its elastic limit.

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Intelliflator.TM. by Merit Medical Systems, Inc. Advertisement.
In Vivo Assessment of Vascular Dilatation During Percutaneous Transluminal Coronary Angioplasty, by Jain et al., American Journal of Cardiology 1987; 60:988-992.
Clinical Trial of the Disposable Transducer Catheter, by Cha et al., Catheterization and Cardiovascular Diagnosis 1988; 14:63-68.
Ballooning-Out Gets Mostly Good Marks, by Edwards, Science News, May 16, 1987, p. 311.

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