A composite volumetric pulse wave signal acquisition and processing finger cot

Abstract

The invention relates to a composite volume pulse wave signal collecting and processing fingerstall which comprises a first unit and a second unit capable of being communicated with the first unit. The first unit comprises an upper shell, a control circuit unit, a sliding base and a spring contact. The second unit comprises a spring wafer, a base, a silica gel strip, a sensor and non-woven fabric. The control circuit unit is arranged in the upper shell, and first sliding rails are arranged on the two opposite side faces of the periphery of the sliding base. Second sliding grooves are formed in the inner sides of the two side faces of the base, and the silica gel strip is fixed to the finger through the non-woven fabric. The sliding base of the first unit can be connected with the base of the second unit through cooperation of the first sliding rails and the second sliding grooves. The overall structural design is ingenious and reasonable, the sensor and the finger are combined tightly, firmly and constantly, use is more convenient, no wire is needed, measurement accuracy and stability can be improved, certain components can be abandoned as consumables when damaged, normal use of other components is not influenced, cost is reduced, and resources are saved.

Description

technical field [0001] The invention relates to a signal acquisition device in the field of medical equipment, in particular to a composite volume pulse wave signal acquisition and processing finger cuff. Background technique [0002] Photoplethysmography (PhotoPlethysmoGraphy, PPG) is a non-invasive detection method for detecting changes in blood volume in living tissue by photoelectric means. [0003] When the light beam of a certain wavelength is irradiated on the surface of the fingertip skin, the light beam will be transmitted to the photoelectric receiver through transmission or reflection. During this process, the light intensity detected by the detector will be weakened due to the absorption and attenuation of the fingertip skin, muscles and blood. The absorption of light by the skin, muscle tissue, etc. remains constant throughout the blood circulation, while the blood volume in the skin changes pulsatingly under the action of the heart. When the heart contracts, ...

AI Technical Summary

Problems solved by technology

And the device that collects PPG signal on the market at present all is to wear collection device body on the wrist, then this collection device body is connected with collection probe through lead wire, and collection probe is a clip, and this clip is clamped on the finger to carry out data collection; The device has at least the following deficiencies: first, when a collision occurs or when the user moves or turns over, the clip is easy to shift, resulting in inaccurate and unstable data collection; the user usually needs to be very careful when collecting PPG signals; secondly, due to The main body of the acquisition device and the acquisition probe are connected by a wire, and the user or other people on the side may accidentally bump or pull the wire, and it is easy to make the acquisition probe shift and affect the measurement results

It is a hollow device through which fingers can pass. The overall structure is finger-like, but the size of the hole passing through the finger in the middle of the device is relatively fixed, and the individual users vary greatly, and the thickness and length of fingers vary greatly, which is easy to cause The pulse sensor is not in stable or firm contact with the finger, which greatly affects the accuracy of data collection

In addition, the structure of the device is fine and complicated, and a damaged part cannot be replaced, so the whole device needs to be discarded. Even if it can be replaced, the operation is complicated and the time cost is high

Therefore, the practicability of the device is not strong and it is not suitable for clinical application

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