vitabel.analysis.ventilation.capnography

Detection of end-tidal CO₂ (etCO₂) values and ventilations from the capnography waveform.

Attributes

logger

Functions

detect_etco2_and_ventilations(...)

Detect end-tidal CO₂ (etCO₂) values and ventilations in a capnography

Module Contents

vitabel.analysis.ventilation.capnography.logger

vitabel.analysis.ventilation.capnography.detect_etco2_and_ventilations(source: vitabel.timeseries.Channel, mode: Literal['threshold', 'filter'] = 'filter', breath_threshold: float = 2, etco2_threshold: float = 3) → tuple[vitabel.timeseries.Label, vitabel.timeseries.Label] | None

Detect end-tidal CO₂ (etCO₂) values and ventilations in a capnography waveform.

Two detection methods are supported:

• 'filter': An unpublished method by Wolfgang Kern (default).

• 'threshold': The method described by Aramendi et al. in [AEA+17].

Parameters:

source

The capnography channel (CO₂ in mmHg).

mode

Method to use for detecting ventilations from the CO₂ signal.

breath_threshold

Threshold below which a minimum is identified as a ventilation (default: 2 mmHg). Used by the 'filter' method.

etco2_threshold

Threshold above which a maximum is identified as an etCO₂ value of an expiration (default: 3 mmHg). Used by the 'filter' method.

Returns:

The (unattached) labels etco2_from_capnography and

ventilations_from_capnography, or None if the mode is unknown.