Wearable sweat self-driven active collection and discharge device

Abstract

The invention provides wearable sweat directional self-driven collecting and discharging equipment which can be used for real-time monitoring of sweat lactic acid, and particularly relates to bionic structure design and a preparation method of the wearable sweat directional self-driven collecting and discharging equipment. The bionic structure inspiration of the equipment comes from an unparallel plate structure of a beach beak and a conical structure of a pine needle. Sweat enters the channel from the bionic inlet, external energy input is not needed, and the sweat can directionally move to enter a detection area only by means of driving force difference generated by self-production of the structure. And a modified electrode plate of the electrochemical sensor is arranged above the detection area and can be used for specifically detecting the content of lactic acid in sweat. In order to accelerate separation of new sweat and old sweat, perspiration structures are arranged on the two sides of the detection area, and the sweat can be automatically discharged out of the detection area only through driving force generated by the structures. By means of the device, physical workers such as athletes and the like can noninvasively and conveniently detect the change of the content of lactic acid in the body in real time, so that the motion state is evaluated, meanwhile, the oxidative metabolism level can be reflected, and early warning is provided for lactic acid poisoning and pressure ischemia.

Description

technical field [0001] The invention relates to the field of microfluidics related to the self-driving of droplets, in particular to a flexible wearable sweat collecting and discharging device that can be used for lactic acid detection in sweat without external driving force. Background technique [0002] In recent years, there are many kinds of wearable devices used to monitor human health, such as smart bracelets, smart watches, smart vests, etc. However, these devices can only monitor human activities and vital signs, such as walking speed, asymmetry of steps, double Foot support time, heart rate, blood oxygen, etc. Biophysical information such as these, while useful for analyzing physiological states, lacks direct information about dynamic biochemical and metabolic processes. [0003] Among a variety of metabolites, lactate is one of the most important markers of tissue oxygen binding. For athletes, firefighters and other people with huge physical energy consumption, la...

AI Technical Summary

Problems solved by technology

The lactic acid in the muscle enters the blood, which increases the blood lactic acid, and the blood sample must be punctured through the skin, which will cause pain and inconvenience, and bring unnecessary risk of infection

[0004] Studies have shown that there is a linear relationship between lactic acid in sweat and blood lactic acid, so blood lactic acid concentration can be assessed by non-invasively analyzing the concentration of lactic acid in sweat. However, the traditional detection of sweat lactic acid on the market needs to use sweat-absorbing paper or gauze to collect sweat. Follow-up analysis is then performed in the laboratory, but sweat exposed to air evaporates easily and is easily contaminated by oils, residual dirt or other chemicals from the surrounding skin

Although the existing wearable sweat detection devices can realize in-body detection, as the amount of sweat increases, there is a problem of mixing old and new sweat, which makes the readings of the sensor only reflect the average value of the change in lactic acid concentration rather than the real-time lactic acid concentration. measured value of

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