| 摘要 |
Apparatus (20) and a method of determining in vivo the instantaneous velocity of the blood flowing within the body of a living being. The apparatus (20) basically comprises respective first and second sensors (42, 44) which are arranged to be disposed at spaced apart locations within a blood vessel (26). The sensors (42, 44) are coupled to a control/analysis unit (24) located externally of the body of the being. The first sensor (42) is arranged to provide a heat pulse to the blood flowing thereby and to provide a first signal at that time. The second sensor (44) is located downstream of said first sensor and is arranged for providing a second signal when the first blood portion passes thereby. The control/analysis unit (24) measures the time period between those signals and based on that value and data representative of the distance separating the sensors, calculates the instantaneous blood velocity. |
