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Supersonic device for accurate location of blood vessels - and for accurately aimed introduction of hypodermic needle into them uses Doppler effect
Supersonic device for accurate location of blood vessels - and for accurately aimed introduction of hypodermic needle into them uses Doppler effect
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机译:超音波设备,用于准确定位血管-并使用多普勒效应将皮下注射针头准确定向到其中
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摘要
The device has near the tip of the needle a supersonic position-finding oscillator which is connected to a high-frequency transmitter and a doppler apparatus to which in turn is connected a depth-measuring device which ascertains the depth of the vessel in accordance with the pulse transit time principle, as well as a measuring aid on the needle in the form of a path-scale extending in the longitudinal direction of the needle. The oscillator may be laid on the face of the skin and serve as a guide to the needle. The oscillator face may be oblique to facilitate oblique introduction of the needle.
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