Method for improving respiratory rate detection accuracy

A technology of respiration rate and accuracy, applied in the evaluation of respiratory organs, etc., can solve problems such as respiration rate calculation errors, inability to correctly distinguish interference waveforms and respiration waves, etc., to eliminate restlessness, calculate stability and reliability, and improve anti-interference ability Effect

Inactive Publication Date: 2011-03-30
EDAN INSTR
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the waveform method cannot correctly distinguish the interference waveform and the respirator...

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  • Method for improving respiratory rate detection accuracy
  • Method for improving respiratory rate detection accuracy
  • Method for improving respiratory rate detection accuracy

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Embodiment Construction

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040]The monitoring equipment used for respiratory signal measurement mainly includes an upper computer and a lower computer. The lower computer mainly obtains respiratory data through a hardware circuit, and then uses a respiratory algorithm to calculate the respiratory rate; the upper computer mainly receives data from the lower computer, and then displays Respiration waveform, respiration rate and apnea alarm. The calculation process of the method of the present invention is as figure 1 As shown, its main steps include:

[0041] The respiration data are first preprocessed using high-pass and low-pass filtering. Then, the empirical mode decomposition is performed on the preprocessed respiratory data; secondly, the intrinsic mode function obtained from the decomposition is selected according to the physiological characteristics of...

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Abstract

The invention discloses a method for improving respiratory rate detection accuracy, comprising the following steps of: preprocessing respiratory data by utilizing high pass and low pass filtering; then carrying out empirical mode decomposition on the preprocessed respiratory data; subsequently, selecting a natural mode function obtained by the decomposition according to the physiological feature of a respiratory signal; then carrying out choking judgment on the obtained natural mode function by utilizing a method of getting the absolute value and solving the average; and if the choking judgment condition is not satisfied, figuring out the respiratory rate at the time by utilizing a wave form method or a frequency spectrum method. By adopting the technical scheme, the respiratory signal can be effectively extracted from respiratory waves of dysphoria interference and heartbeat interference. The method of the empirical mode decomposition effectively overcomes the defect that the respiratory signal containing the interference is directly processed by the wave form method and the frequency spectrum method, and finally, the weighted average of the historical respiratory rate is introduced, and thereby, the interference resistance of respiratory detection can be improved to make the respiratory rate calculation stable and reliable.

Description

technical field [0001] The present invention relates to a method for improving the accuracy of respiratory rate detection, in particular to a method for decomposing time-domain waveforms by using an empirical mode decomposition method, and then finding the intrinsic mode function corresponding to the respiratory wave, thereby removing interference and improving respiratory rate Assay accuracy and stability of the method. Background technique [0002] The method based on impedance measurement is often used in respiratory devices to obtain respiratory wave signals. When the human body breathes, the impedance of the thoracic cavity will change accordingly with the rise and fall of the thorax. By detecting the change of impedance, the respiratory wave can be obtained. The actual respiration measurement process generally uses electrodes attached to specific positions on the body surface to modulate the impedance change of the chest cavity with a high-frequency carrier signal thr...

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Application Information

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IPC IPC(8): A61B5/08
Inventor 王敏谢锡城陈鎏
Owner EDAN INSTR
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