Method for detecting speed of intravenous infusion and device therefor

Abstract

The invention relates to a method and a device for detecting dropping speed of liquid medicine, in particular to a method for detecting speed of intravenous infusion and a device therefor. The device comprises an electromagnetic wave generator, an emitting antenna, an electromagnetic wave receiver, a receiving antenna and an electromagnetic wave processor. If the radar echo frequency is not changed, that no liquid medicine is dropped in a dropping funnel of an infusion apparatus is judged; if Doppler frequency shift exists between radar waves and echo, that liquid medicine is dropped in the dropping funnel of the infusion apparatus is judged; and the blanking time for dropping each drop of the liquid medicine is calculated to obtain infusion drop number in each minute, and the infusion quantity in each minutes is converted according to the volume of each drop of the liquid medicine. The device has high sensitivity, strong radio interference resistance, no optical radiation, small output power of electromagnetic waves and low power consumption, and is not influenced by the lighting environment outside.

Description

technical field [0001] The invention belongs to the field of medical technology, and relates to a method and a device for detecting the dripping speed of a medicinal liquid, in particular to a method and a device for detecting the speed of an intravenous infusion. Background technique [0002] To improve the curative effect of intravenous infusion for patients, it is not enough to improve the quality of drugs alone. The speed of intravenous infusion is directly related to the change of blood drug concentration, which requires detection of the speed of intravenous infusion. [0003] In the prior art, the infusion speed detection method is photoelectric detection, and its principle is: the infrared light emitting and receiving probe is near the liquid level of the infusion set dripping funnel (Murphy's tube), when the medicinal liquid drips in the dripping funnel, The infrared luminous flux is changed. This change is obtained by the infrared receiving head. By calculating the...

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Problems solved by technology

However, for the photoelectric detection method, due to the need to adapt to large-scale changes in the background light, the sensitivity is high, the circuit is easy to receive interference, and misjudgment occurs; moreover, under a specific background light, the infrared receiving head will have signal disturbances; in addition, inferior The light source irradiation of fluorescent lamps will directly affect the accuracy; in addition, in order to ensure accurate capture of drip data, multiple sets of light sources and receivers are used, which not only increases the cost of materials, but also increases the transmission power, because of its large light radiation and photosensitive Drugs are not easy to use; at the same time, due to the high power consumption, the battery consumption of portable devices is large, which is not conducive to environmental protection; in addition, due to the large power aging problem of the infrared light emitting source when used, its device life is also defective

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