Pathology gas collection device including elastic bag body

Abstract

The invention discloses a pathological gas collection device comprising an elastic bag body, comprising: a collection bag and a flow guiding device; the flow guiding device includes: a casing; a stator; a rotor, which forms a first pressure with the stator and the casing The comparison chamber and the second pressure comparison chamber, the first pressure comparison chamber communicates with the gas flow channel, the bias mechanism; the throttling mechanism, which is connected to the gas outlet so that the gas flowing out from the gas outlet passes through the throttling mechanism; A pressure ratio contrast flow channel is formed between the flow mechanism and the second pressure ratio contrast chamber. Since the difference between the pressure of the air outlet before entering the throttling mechanism and the pressure of the gas flowing out of the throttling orifice remains basically constant, and because the throttling orifice determined by the throttling mechanism will not change during the patient's exhalation, therefore, The flow rate of the gas passing through the throttling opening remains substantially constant, that is, the flow rate of the gas flow flowing out of the throttling mechanism into the bag remains substantially constant.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a gas collection device for pathology including an elastic bag body. Background technique [0002] Many diseases can be diagnosed by analyzing the concentration of certain substances (or viruses, bacteria) in the breath exhaled by the patient. [0003] In order to collect the gas exhaled by the patient, a gas collection device has appeared in the prior art. The gas collection device includes a flow guide device and a collection bag. The flow guide device has an inlet and an outlet directly connected to each other, and the outlet is connected to the collection bag. The patient exhales through the inlet into the deflector so that air is received in the collection bag through the outlet. [0004] However, due to the different gas pressures exhaled by different patients (or the same patient in different periods of an exhalation process), during the exhalation process, the patient c...

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Problems solved by technology

[0006] According to the above, although the above-mentioned Chinese patent can reduce the range of pressure variation of the gas, the range of pressure variation of the gas discharged from the gas flow regulating device is still very large, and the range of variation of the gas flow rate is still very large.

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