Infusion alarm method and device based on raster image measurement

Abstract

The invention relates to an infusion alarm method and device based on raster image measurement and belongs to the technical field of medical instruments. The method includes: setting a raster with carved black and white lines on one side of a transparent infusion hose, setting an imaging lens on the other side of the transparent infusion hose, lighting the raster with a light source, setting an image sensor on the other side of the imaging lens to receive raster real images, converting the raster real images into a digital image signal, filtering the digital image signal by a digital signal processor, and measuring the width of black and white lines on the raster in the digital image signal and spacing of the black and white lines on the raster; comparing the width and spacing to width and spacing of the infusion house containing no liquid, judging whether liquid exists in the hose or not, and alarming according to judgment results by a buzzer. The infusion alarm method and device based on raster image measurement has the advantages that the structure is simple, using is facilitated, the price is low, and sensitivity and reliability are high.

Description

technical field [0001] The invention relates to an infusion alarm method based on raster image measurement and a device thereof, belonging to the technical field of medical devices. Background technique [0002] Intravenous infusion is one of the common clinical nursing operations. Hospitals at all levels have a large number of patients receiving infusion every day. Due to the serious imbalance between patients and medical staff in my country, nurses usually hand over the monitoring of infusion progress to patients or their accompanying personnel. When the infusion is nearly completed, the patient or his companion calls the medical staff to pull out the needle or change the dressing in time, otherwise it will cause accidents such as dripping empty infusion, air embolism, blood return and coagulation, and re-injection. Since the infusion time is usually long, monitoring the infusion progress with the eyes for a long time will easily cause tension and fatigue. If the patient an...

AI Technical Summary

Problems solved by technology

The disadvantage of the electrode method is that the alarm device needs to be in contact with liquid, which is easy to cause pollution and has potential safety hazards

[0006] (2) Gravimetric method: Measure the weight of the infusion bottle by using the spring balance and the lever principle, and judge whether the infusion is completed according to the weight change of the liquid in the infusion bottle. are not the same, so they cannot provide accurate alarm signals and are difficult to apply in practice

The photoelectric method uses the change of the light intensity signal received by the photoelectric receiver to judge whether the infusion is complete, and is vulnerable to changes in ambient light intensity (day, night), light interference (turning on and off) and changes in liquid color (transmittance) Influence, it is very prone to false positives and false positives, low reliability, no practical application value

[0008] The above three infusion alarm methods have obvious safety and reliability problems in principle, so it is difficult to form products and promote their application

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