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Method for adjusting tidal volume under IPPV mode

A tidal volume and inspiratory valve technology, applied in the field of ventilators, can solve the problem that the method of adjusting tidal volume is not particularly accurate, and does not take into account the compliance of the lungs in the pipeline.

Inactive Publication Date: 2017-07-04
BEIJING AEONMED
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Problems solved by technology

[0002] In the IPPV mode, the existing methods of adjusting tidal volume often do not take into account the compliance of the pipeline and the lungs. Since the compliance of the lungs is a nonlinear system, the traditional method of adjusting tidal volume is not particularly accurate.

Method used

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  • Method for adjusting tidal volume under IPPV mode

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Embodiment Construction

[0022] The present invention will be further described in detail with the accompanying drawings and specific embodiments.

[0023] Such as figure 1 Shown, a kind of method for adjusting tidal volume under IPPV ventilation mode, described method comprises the following steps:

[0024] 1) Set the tidal volume, I / E ratio and respiratory frequency, and calculate the inspiratory flow rate of the inspiratory valve according to the following formula;

[0025] Inspiratory flow rate = set tidal volume / inspiratory time, inspiratory time = 60 / respiratory rate × (inspiratory time / (inspiratory time + exhalation time));

[0026] 2) The opening voltage of the inspiratory valve is obtained from the inspiratory flow rate according to the corresponding table of inspiratory valve voltage and flow rate. After one exhalation cycle, the overall tidal volume is calculated according to the following formula;

[0027] Overall tidal volume = system compliance / (system compliance - pipeline com...

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Abstract

The invention discloses a method for adjusting tidal volume under an IPPV mode. The method comprises the following steps: 1) setting tidal volume, inspiration and expiration ratio, and respiratory frequency, according to the following formula, calculating inspiratory flow of an inhalation valve, inspiratory flow = set tidal volume / inspiratory time, inspiratory time=60 / respiratory frequency x (inspiratory time / (inspiratory time + expiratory time)); 2) through the inspiratory flow, according to a corresponding table of inhalation valve voltage and flow velocity, obtaining threshold voltage of the inhalation valve, after an expiration period, according to the following formula, calculating overall tidal volume, overall tidal volume = system compliance / (system compliance - pipeline compliance) x set tidal volume; 3) according to the following formula, calculating actual tidal volume, actual tidal volume = overall tidal volume - tidal volume consumed by a pipeline; 4) according to the difference value of the set tidal volume and the actual tidal volume, through adjusting inspiratory flow, adjusting the threshold voltage of the inhalation valve, so as to adjust the overall tidal volume. The method is simple and feasible.

Description

technical field [0001] The invention belongs to the technical field of ventilators, and relates to a method for adjusting tidal volume in an IPPV ventilation mode. Background technique [0002] In the IPPV mode, the existing methods of adjusting tidal volume often do not take into account the compliance of the pipeline and the lungs. Since the compliance of the lungs is a nonlinear system, the traditional methods of adjusting tidal volume are not particularly accurate. Contents of the invention [0003] The purpose of the present invention is to provide a method for adjusting tidal volume in IPPV ventilation mode, which fully considers the influence of respiratory system compliance and pipeline compliance on tidal volume adjustment, and calculates the overall consumed tidal volume through compliance In the respiratory cycle, use the deviation between the set tidal volume and the actual tidal volume to adjust the tidal volume consumed as a whole. This method is simple and e...

Claims

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Application Information

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IPC IPC(8): A61M16/00
CPCA61M16/00A61M16/0003A61M2205/3337A61M2210/1025
Inventor 田永锋华威
Owner BEIJING AEONMED
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