Surgery – Truss – Pad
Patent
1990-09-07
1992-10-06
Jaworski, Francis
Surgery
Truss
Pad
12866206, 7386125, A61B 812
Patent
active
051522918
ABSTRACT:
One or more acoustic fiber guides are used to carry certain modes of acoustic energy to the tip of a catheter. Using these fibers, reflected sound (Doppler Sound) measurements are made in a blood environment without the risk to the patient associated with the use of an electrical transducer at the distal end of the catheter. Due to the size reduction provided, the Doppler probe is suitable for monitoring the blood flow in the coronary arteries. Using this invention wherein sound is transported to the catheter tip, risk is reduced and the catheter is significantly less expensive, and therefore can be treated as disposable. By the addition of optical fibers tipped with specific dyes and excited by optical energy of appropriate wavelength, the catheter tip system can also be utilized simultaneously as a combined (integral) optical blood gas and pH monitor using optical fluorescence and an acoustic Doppler velocity transducer.
REFERENCES:
patent: 4270050 (1981-05-01), Brogardh
patent: 4431006 (1984-02-01), Trimmer et al.
patent: 4587972 (1986-05-01), Morantte, Jr.
patent: 4716363 (1987-12-01), Dukes et al.
"A Single-Crystal Ultrasonic Catheter-Tip Velocity Probe," Hartley et al., Medical Instrumentation (1974), vol. 8, pp. 241-243, No. 4.
"Subselective Measurement of Coronary Blood Flow Velocity Using a Sterrable Doppler Catheter," Silbey et al., JACC (Dec. 1986), vol. 8, No. 6.
"Intravascular Ultrasound: Development and Clinical Potential," Yock et al., American Journal of Cardiac Imaging, vol. 2, pp. 185-193, No. 3, (Sep. 1988).
"Similarities and Differences Between Fiber Acoustics and Fiber Optics," C. K. Jen, IEEE 1985 Ultrasonics Symposium, Oct. 16-18, 1985.
"Review of Intracoronary Doppler Catheters," Craig J. Hartley, International Journal of Cardiac Imaging (1989) vol. 4, pp. 159-168.
"Optical Fluorescence and its Application to an Intravascular Blood Gas Monitoring System," Gehrich et al., IEEE (1969), vol. BME-33, No. 2, pp. 117-131.
"Measurements in Medical Practice and Research," Tsitlik et al., Sensors, Jul. 1987, pp. 11-17.
"Fiber-Optic Diaphragm-Curvature Pressure Transducer," Lawson et al., Optical Society of America, vol. 8, No. 5, pp. 286-288.
"Very High Frequency Pulsed Doppler Apparatus", Ultrasound in Medicine and Biology, vol. 15, No. 2, 121-131; (1989), M. Berson, F. Patat, Z. Q. Wange, D. Besse and L. Pourcelot.
"Grafted Hydrophilic Polymers as Optical Sensors", Sensor Technology, Feb. 1, 1988.
"Measuring Coronary Blood Flow", Sensor Technology, Feb. 1988.
Doppler Ultrasound and Cardiology, Liv Hatle, M.D., Bjorn Angelsen, Dr. Techn., 1982.
"Synchronized Pulsed Doppler Blood Flow and Ultrasonic Dimension Measurement in Conscious Dogs," Ultrasound in Medicine and Biology, vol. 4, pp. 99-110, 1978; C. J. Hartley, H. G. Hanley, R. M. Lewis, and J. S. Cole.
"Pulsed Ultrasonic Doppler Blood-Flow Sensing", Donald W. Baker; IEEE Transactions on Sonics and Ultrasonics, vol. 80, SU-17, No. 3, Jul. 1970.
"A New Doppler Flowmeter System and its Operation with Catheter Mounted Transducers," Cardiovascular Applications of Ultrasound, Robert S. Reneman, Editor, North-Holland/American Eleseuir Publishers J. M. Reid, D. L. Davis, H. J. Rickets and M. P. Spencer.
Hewlett--Packard Company
Jaworski Francis
LandOfFree
Acoustic fiber measurement of intravascular blood does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Acoustic fiber measurement of intravascular blood, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic fiber measurement of intravascular blood will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1183164