Ultrasound-Optical Doppler Hemometer and Technique for Using the Same
First Claim
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1. A monitoring system comprising:
- a storage device storing routines for;
receiving a signal from a photodetector;
receiving a signal from an ultrasound transducer;
determining at least one of a blood flow velocity or a red blood cell level based at least in part on the photodetector signal;
determining a blood vessel size based at least on part on the ultrasound transducer signal;
determining a physiological parameter based at least in part on the blood vessel size and one or more of the flow velocity or the red blood cell level; and
a processor capable of executing the stored routines.
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Abstract
According to embodiments, a sensor assembly and/or systems for ultrasound-optical measurements may provide information related to hemodynamic parameters. An ultrasound beam may be used to generate a Doppler field for optical elements of a sensor assembly. By combining information received from ultrasound and optical elements of the sensor assembly, more accurate values for hemodynamic parameters may be determined.
114 Citations
20 Claims
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1. A monitoring system comprising:
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a storage device storing routines for; receiving a signal from a photodetector; receiving a signal from an ultrasound transducer; determining at least one of a blood flow velocity or a red blood cell level based at least in part on the photodetector signal; determining a blood vessel size based at least on part on the ultrasound transducer signal; determining a physiological parameter based at least in part on the blood vessel size and one or more of the flow velocity or the red blood cell level; and a processor capable of executing the stored routines. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method, comprising:
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receiving a signal from a photodetector; receiving a signal from an ultrasound transducer; determining at least one of a blood flow velocity or a red blood cell level based at least in part on the photodetector signal; determining a blood vessel size based at least on part on the ultrasound transducer signal; determining a physiological parameter based at least in part on the blood vessel size and one or more of the flow velocity or the red blood cell level. - View Dependent Claims (11, 12)
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13. A method comprising:
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emitting photons into a blood vessel of a patient'"'"'s tissue; focusing an ultrasonic beam into the blood vessel so that a portion of the photons in the blood vessel experience a Doppler shift; generating a signal related to detected photons at a detector; and processing the signal to isolate a signal component representative of photons that have undergone a Doppler shift of a magnitude greater than a predetermined threshold; and analyzing the isolated signal component to determine one or more properties of the blood vessel. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification