A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
349/36, 326/13.5
A61B 8/06 (2006.01)
Patent
CA 1252554
- 32 - NON-INVASIVE BLOOD FLOW MEASUREMENTS UTILIZING CARDIAC CYCLE SYNCHRONIZATION Abstract A system for non-invasively determining the amount of blood flow by performing an autoregressive analysis of Doppler shifted acoustical signals resulting from reflected ultrasonic signals from blood cell movement within internal blood vessels. Each cardiac cycle is determined by an analysis of the patient's electrocardiogram signals, and the resulting cardiac cycles are divided into a predefined number of time segments each containing Doppler shifted signals. The autoregressive analysis is then performed over each individual channel to determine reflection coefficients that model the blood flow and a residual energy level that indicates the energy not accounted for by that modeling. A power spectrum analysis is then performed utilizing the reflection coefficients and residual energy level for each channel. Then, the power spectra of individual channels of all of the cycles are averaged together producing a group of averaged channels representing the average blood flow through the patient's internal vessel over all of the cardiac cycles. These averaged power spectra for each combined channel are then normalized and displayed on a channel- by-channel basis utilizing different colors to represent the different power levels, The utilization of different colors greatly enhances the ability of medical personnel to make diagnostic decisions regarding the amount of blood flow.
508391
Kierney Catherine M.p.
Zimmerman Gustavus H. III
American Telephone And Telegraph Company
Kirby Eades Gale Baker
LandOfFree
Non-invasive blood flow measurements utilizing cardiac cycle... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-invasive blood flow measurements utilizing cardiac cycle..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-invasive blood flow measurements utilizing cardiac cycle... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1187644