Allen H V, Knutti J W, Meindl J D
Biotelem Patient Monit. 1979;6(3):118-32.
Two totally implantable Doppler blood flowmeters have been developed for the chronic measurement of deep-body flows; made possibly by two custom-integrated circuits. The CW and pulsed Doppler instruments are small (less than 2.5 cm3), use little power (less than 30 mW), and have excellent baseline stability. The pulsed Doppler flowmeter is applied principally when velocity-profile information or a nonencircling transducer assembly is required but where minimal restraint of the animal for inductive telemetry is permissible. Using a circumferential cuff, the CW Doppler flowmeter monitors Doppler data over a at least a 3-meter range by means of RF telemetry and produces a single velocity estimate. These instruments compliment each other and other telemetry systems by proving the researcher with alternatives for the long-term measurement of deep-body flow without percutaneous leads.
已开发出两种完全植入式多普勒血流仪，用于长期测量深部身体的血流；这得益于两个定制集成电路。连续波（CW）和脉冲多普勒仪器体积小（小于2.5立方厘米），功耗低（小于30毫瓦），且基线稳定性极佳。脉冲多普勒血流仪主要用于需要速度剖面信息或非环绕式换能器组件的情况，但允许对动物进行最小限度的感应遥测约束。连续波多普勒血流仪使用圆周袖带，通过射频遥测在至少3米的范围内监测多普勒数据，并产生单一速度估计值。这些仪器相互补充，也与其他遥测系统互补，为研究人员提供了无需经皮引线进行深部身体血流长期测量的替代方案。
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