A spirometry device

Abstract

The invention discloses a vital capacity measuring device. The vital capacity measuring device comprises a box, a pumping assembly, a radar water level measuring instrument, a controller, a display screen, a drainage assembly and an air guide pipe, wherein the radar water level measuring instrument and the display screen are connected with the controller, a partition plate is arranged in the box and divides the box into a measuring cavity and a water storing cavity, and an opening is formed in the partition plate; the drainage assembly comprises a sleeve, a water tank and a first electronic control valve, the sleeve is arranged on the opening, the water tank is located in the water storing cavity, the first electronic control valve is arranged in the water tank, the electronic control end of the first electronic control valve is connected with the controller, one end of a channel of the first electronic control valve is connected with the sleeve, drainage holes are formed in the side wall of the channel of the first electronic control valve and are lower than the upper end face of the water tank, a pressure balancing pipe is arranged in a water inlet channel of the first electronic control valve in the vertical direction, the lower end face of the pressure balancing pipe is flush with the upper end face of the water tank, and the upper end of the pressure balancing pipe is connected with one end of the air guide pipe. The vital capacity measuring device has the advantage of being high in measuring accuracy.

Description

technical field [0001] The invention relates to a lung capacity measurement technology, in particular to a lung capacity measurement device. Background technique [0002] At present, it is of great significance to measure vital capacity to judge the nature and degree of certain respiratory function reduction of patients, as well as the working ability of patients after recovery from the disease. The drainage-type spirometry device has been widely used in the field of spirometry because of its simple structure, low manufacturing cost and environmental protection. The existing drainage type spirometry device usually includes a water storage container and a pipeline, and the pipeline is connected to the bottom of the water storage container and communicated with the water storage container. Before use, put water into the water storage container and the pipeline, keep the nozzle of the pipeline horizontal, and the liquid level in the water storage container and the pipeline is ...

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Problems solved by technology

[0003] However, there are the following problems in the existing drainage-type vital capacity measuring device: 1. During the exhalation process of the patient under test, the liquid level in the water storage container continues to drop, and the resistance suffered by the patient's exhalation increases with that in the water storage container. The liquid level decreases and increases, and at the same time, the pressure in the lungs is low in the late stage of exhalation, so that the patient under test cannot exhale the residual air, which has a negative impact on the measurement accuracy; influence, the accuracy of measurement results is difficult to guarantee

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