| 摘要 |
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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