Flow monitor and vascular access system with continuously variable frequency control
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United States of America Patent
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-
Nov 15, 1994
Issued Date -
N/A
app pub date -
Oct 25, 1993
filing date -
Jun 19, 1992
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An apparatus for use in flow monitoring and cannulation of blood vessels which includes vascular accessing capabilities. The apparatus includes a flux panel, an audio monitor, and a probe-needle assembly. The flux panel is composed of two or more sections hingedly connected wherein each section includes a transducer having a continuously varying thickness from one end to the other. Successive bands of excitation are progressively created along the length of each transducer as different frequencies are transmitted thereto. The apparatus may be operated in either monitor or access modes with both manual and automatic changes frequencies. The apparatus is capable of transmitting high-powered ultrasonic waves of continuously variable resonant frequencies to be used along with an audio monitor for sensing flow or in conjunction with a probe-needle assembly to locate body vessels.
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