Inspired signal
A low-concentration N₂O signal is added to the inspired gas stream.
From tracer gas to real-time heart-lung measurement.
InspiWave™ adds a low-concentration N₂O signal to inspired gas and reads the exhaled response breath by breath, deriving functional cardiopulmonary measurements without interrupting ventilation.
How InspiWave reads physiology conventional monitors only imply.
Each small tracer signal is measured in the breathing circuit. As the lung takes up and exhales the signal, the response waveform carries information about gas exchange, cardiac output, dead space, and ventilatory distribution.
Exhaled response
The lung modifies the returning waveform based on exchange, perfusion, and distribution.
Functional readout
The system turns the breath-by-breath response into continuous bedside measures.
Four measurements, one continuous physiology layer.
InspiWave adds functional heart-lung data beside conventional monitor signals, helping teams see whether ventilation changes are improving gas exchange and cardiopulmonary response.
Effective lung volume
The volume of lung available for gas exchange. Useful in setting tidal volume, PEEP titration, and tracking recruitment and derecruitment.
Cardiac Output
Cardiac output measured continuously and noninvasively, giving teams insight into heart-lung response while ventilation decisions are being made.
Dead space
Ventilation that does not participate in gas exchange, including physiologic, anatomic, and instrumental dead space.
Functional ventilatory distribution
A global measure of how uniformly ventilation distributes across the lung, indicating whether functional ventilation is improving or degrading.
Validated from bench to bedside.
The inspired sinewave technique has been studied across bench models, volunteers, operating rooms, ICU deployments, and COPD populations.
Peer-reviewed publications
Cardiac-output concordance with invasive thermodilution reference
COPD detection sensitivity in published validation
Bench Volunteer OR ICU COPD
Farmery et al. Inspired sinewave technique for measuring pulmonary blood flow and dead space. British Journal of Anaesthesia
Phan et al. Estimation of effective lung volume using the inspired sinewave technique. Physiological Measurement
Hahn et al. Noninvasive measurement of cardiac output during surgery. Journal of Clinical Monitoring and Computing
Bruce et al. Ventilatory heterogeneity in COPD. International Journal of COPD