| 摘要 |
Pulsed ultrasound sensor 10, connected to means 11 for controlling its passage and positioning along and within an exogenous conduit 13 sited within a bodily tract 15 with access to the extracorporeal environment, transmits into a blood vessel 14 and times its acquisition of signals scattered from the blood flow F to probe two or more adjacent locations 16 and 18 within the blood vessel 14. Signals returned from the blood vessel (e.g. energy or Doppler shift due to blood flow F) can be monitored to align the transmission path of the sensor with the blood vessel axis (FIGS. 4 and 5). The apparatus can be used to measure cardiovascular parameters in a non-invasive, non-surgical manner with minimal intervention from a physician.
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