Simplified display of end tidal co2

Abstract

A capnography device comprising a capnography measurement component (20) configured to measure respiratory carbon dioxide levels and an electronic processor (30) programmed to generate a capnography graph signal (40), and end-tidal carbon dioxide (etCO2) is calculated by performing a sliding window max operation (42, 44) on 2 ) signal (50). In some embodiments, the sliding window maximum operation takes its duration (T W ) is a sliding time window (W) of at least 30 seconds. A smoothing filter may be applied to the capnogram signal prior to performing the sliding window max operation, and / or a smoothing filter may be applied (52) after the sliding window max operation to produce a smoothed etCO 2 signal (54). The capnography device may be a lateral flow capnography device (10) or a mainstream capnography device.

Description

technical field [0001] The following generally relates to the field of capnography and related fields. Background technique [0002] Capnography devices monitor the carbon dioxide (CO 2 ) concentration or partial pressure. A common capnographic parameter is conceptually the CO at the end of the expiratory phase 2 partial pressure of end tidal CO 2 (etCO 2 ). However, since this is often the maximum observed CO during the respiratory cycle 2 partial pressure, so etCO 2 Clinically defined as the maximum observed CO during the respiratory cycle 2 Partial pressure. eCO 2 Usually presented as a partial pressure (PetCO 2 ) or a percentage value. [0003] etCO measured by capnography 2 The parameter is generally used as a measurable surrogate for the maximum partial pressure of carbon dioxide at the alveoli. maximal alveolar CO 2 Knowledge of partial pressures is in turn useful in diagnosing the state of the lungs and cardiopulmonary system, and thus has great value f...

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Problems solved by technology

[0004] However, etCO measured by capnography 2 Tends to be noisy and can vary significantly between breaths

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