Doppler transceiver and probe for use in minimally invasive procedures
First Claim
1. A system for the detection of blood flow, the system comprising:
- a non-imaging Doppler transceiver unit comprising a signal generator having a plurality of factory defined preset signal sensitivity depth selectors, said preset signal sensitivity depth selectors being configured to allow a user to transition between standard signal depths during a procedure;
a Doppler probe for insertion in to a body cavity, said cavity being external to a target blood vessel during minimally invasive surgical procedures coupled to said transceiver;
said Doppler probe comprising;
a piezoelectric crystal disposed at a first end of said Doppler probe;
at least one wire transmitting signals between said transceiver unit to said piezoelectric crystal and a transceiver unit coupler disposed at a second end of said Doppler probe.
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Accused Products
Abstract
A system is disclosed for the detection of blood flow. The system provides, a portable transceiver unit having a signal generator, a signal comparator, and an audio output whereby a user receives an audio signal indicating differences in Doppler signal, and a Doppler probe coupled to the portable transceiver. The Doppler probe including a piezoelectric crystal disposed at a first end of the Doppler probe; at least one wire transmitting signals between the transceiver unit to the piezoelectric crystal; a rigid or flexible sheath disposed around at least part of the at least one wire and the piezoelectric crystal; and a transceiver unit coupler disposed at a second end of the Doppler probe. The system may also have a quantitative blood flow meter or signal strength meter.
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Citations
25 Claims
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1. A system for the detection of blood flow, the system comprising:
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a non-imaging Doppler transceiver unit comprising a signal generator having a plurality of factory defined preset signal sensitivity depth selectors, said preset signal sensitivity depth selectors being configured to allow a user to transition between standard signal depths during a procedure; a Doppler probe for insertion in to a body cavity, said cavity being external to a target blood vessel during minimally invasive surgical procedures coupled to said transceiver; said Doppler probe comprising; a piezoelectric crystal disposed at a first end of said Doppler probe; at least one wire transmitting signals between said transceiver unit to said piezoelectric crystal and a transceiver unit coupler disposed at a second end of said Doppler probe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for the assessment of blood flow in vessels, said method comprising:
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inserting a Doppler probe into a body cavity external to a blood vessel; positioning said Doppler probe proximate to a target tissue region; selecting a depth of signal sensitivity from a plurality of factory defined preset signal depths configured for transition during a procedure; emitting at least one pulse from said Doppler probe; receiving at least one reflected pulse; generating an audio signal correlating to the velocity of blood flowing in said vessel; and assessing blood flow in said vessel based on said audio signal and without an ultrasonic image. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A system for the quantitative assessment of blood flow, said system comprising:
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a non-imaging Doppler transceiver unit comprising a signal generator, a signal comparator, and an audio output whereby a user receives an audio signal indicating differences in Doppler signal; a Doppler probe coupled to said transceiver; and a flow meter comprising a visual quantitative display and a zero-crossing detector; said Doppler probe comprising; a piezoelectric crystal disposed at a first end of said Doppler probe; at least one wire transmitting signals between said transceiver unit to said piezoelectric crystal; a sheath disposed around at least part of said at least one wire and said piezoelectric crystal; a transceiver unit coupler disposed at a second end of said Doppler probe; and a plurality of factory defined preset signal sensitivity depth selectors.
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25. A system for the quantitative assessment of blood flow, said system comprising:
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a non-imaging, Doppler transceiver unit comprising a signal generator, a signal comparator, and an audio output whereby a user receives an audio signal indicating differences in Doppler signal; a Doppler probe coupled to said transceiver; and a signal strength meter comprising a visual quantitative display and a signal strength detector having an amplifier for amplifying a reflected signal, a rectifier for rectifying said reflected signal and a low band filter producing a signal proportional to strength of said reflected signal; said Doppler probe comprising; a piezoelectric crystal disposed at a first end of said Doppler probe; at least one wire transmitting signals between said transceiver unit to said piezoelectric crystal; a sheath disposed around at least part of said at least one wire and said piezoelectric crystal a transceiver unit coupler disposed at a second end of said Doppler probe; and a plurality of factory preset signal sensitivity depth selectors.
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Specification