Flow sensor for pulmonary function testing

A flow sensor and lung function technology, applied in the field of medical devices, can solve the problems of mutual conversion, affecting test accuracy, blocking mesh, etc., and achieve the effect of low cost, high detection sensitivity and accurate value

Inactive Publication Date: 2016-11-16
浙江亿联健医疗器械有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this technology is that the exhaled water vapor is easy to condense and deposit on the sieve mesh to block the mesh. It is difficult to clean and disinfect the mesh, which af

Method used

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  • Flow sensor for pulmonary function testing
  • Flow sensor for pulmonary function testing

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Embodiment

[0013] Embodiment: a flow sensor for pulmonary function detection, together with the host of the pulmonary function instrument to form a pulmonary function instrument, such as figure 1 As shown, it includes a base body 1. The total length L of the base body 1 is 100 mm. The base body 1 is provided with a through-hole 2 that can be blown, a high-pressure pressure tapping port 4, and a low-pressure pressure tapping port 8. The through-hole 2 is blown from the air. One end to the other end where the air blows out is provided with an inlet section 3, a contraction section 5, a throat section 7, and a diffusion section 9 in sequence. The diameter D of the inlet section 3 is 25mm, the length L1 of the inlet section 3 is 45mm, and the throat section 7 The diameter d is 12mm, the length L2 of the throat section 7 is 10mm, the constriction section 5 is in the shape of a circular platform, the large end of the constriction section 5 is connected with the inlet section 3, the small end of...

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Abstract

The invention discloses a flow sensor for pulmonary function testing. The flow sensor comprises a base body, the base body is provided with a through hole capable of achieving air blowing, a high-pressure pressure tap and a low-pressure pressure tap, the high-pressure pressure tap and the low-pressure pressure tap are communicated with the through hole separately, the diameter of the middle of the through hole is smaller than that of the two ends of the through hole, the middle small-diameter segment of the through hole serves as a throat segment, the air blowing segment of the two ends of the through hole serves as an inlet segment, the high-pressure pressure tap is communicated with the inlet segment, and the low-pressure pressure tap is communicated with the throat segment. The flow sensor for pulmonary function testing has the advantages that the suitable changing gradient of a diameter difference is calculated and analyzed through the fixed diameter difference among the different hole segments of the through hole, it is guaranteed that the pressure difference under the laminar condition can be obtained between the high-pressure pressure tap and the low-pressure pressure tap, and therefore the flow sensor achieves the high testing sensitivity, is accurate in tested pressure difference valve and reusable, does not need to be calibrated and is simple in structure and low in usage cost.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a differential pressure type throttling respiratory flow sensor for lung function detection. Background technique [0002] With the deterioration of the environment and the increase of smog, there are more and more patients with lung diseases, especially chronic obstructive pulmonary disease (COPD) has become a global public health problem, with a large number of patients and high mortality , The social and economic burden is heavy. The effective detection of human lung function by lung function instrument is an important means of early identification and early diagnosis of chronic obstructive pulmonary disease, so that early intervention therapy can obtain better curative effect. Currently commonly used spirometers include bellows-type portable spirometers, turbine-type portable spirometers, ultrasonic velocity sensing-type portable spirometers, differenti...

Claims

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Application Information

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IPC IPC(8): A61B5/087A61B5/097
CPCA61B5/087A61B5/097A61B5/682
Inventor 王颖硕周勇吴磊刘金玲陈志敏胡锡江王天星
Owner 浙江亿联健医疗器械有限公司
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