Inspired sinewave
A small, repeated tracer signal is introduced into the breathing circuit.
From tracer gas to real-time heart-lung measurement.
InspiWave™ gives clinicians a continuous view of how the heart and lungs are responding during ventilation, without interrupting care or adding invasive lines.
How InspiWave reads physiology conventional monitors only imply.
A low dose sinusoidally modulated tracer signal is added to the inspired gas and compared to the output signal in the expired gas, allowing modelling and characterisation of the cardiopulmonary system.
Expired response
The returning waveform changes as gas moves through the lung and circulation.
Functional model
Those changes are modelled into continuous bedside measures of heart-lung function.
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