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 Consumables

Flow sensors. Proximal flow and pressure measurement

Flow sensor

Come closer! Proximal flow measurement

The proximal flow sensor has been the centerpiece of our ventilators since 1983. The whole ventilation process depends on the measurement and accuracy of the flow sensor, and they provide data from the airway opening.

Precise volume, flow, and pressure data is crucial to making a correct diagnosis and avoiding common side effects of inappropriate ventilation settings. It is also what enables some of our advanced technologies, such as the ASV and INTELLiVENT-ASV modes, IntelliSync+, and the P/V Tool.

Flow sensor

Accuracy is a must. Your patients depend on it

Our ventilators measure flow and pressure close to the patient's airway. Studies have shown that tidal volumes for ventilated patients should be determined with a flow sensor placed at the endotracheal tube (Cannon ML, Cornell J, Tripp-Hamel DS, et al. Tidal volumes for ventilated infants should be determined with a pneumotachometer placed at the endotracheal tube. Am J Respir Crit Care Med. 2000;162(6):2109-2112. doi:10.1164/ajrccm.162.6.99061121​, Gammage, Gary W.; Banner, Michael J.; Blanch, Paul B.; Kirby, Robert R. VENTILATOR DISPLAYED TIDAL VOLUME—WHAT YOU SEE MAY NOT BE WHAT YOU GET, Critical Care Medicine: April 1988 - Volume 16 - Issue 4 - p 454 2​)

Graphic illustration: woman thinking about a question

Do we have proof? Clinical evidence

Accurately determining the exhaled tidal volume (VTE) is crucial (Cannon ML, Cornell J, Tripp-Hamel DS, et al. Tidal volumes for ventilated infants should be determined with a pneumotachometer placed at the endotracheal tube. Am J Respir Crit Care Med. 2000;162(6):2109-2112. doi:10.1164/ajrccm.162.6.99061121​), especially in situations where only small tidal volumes are delivered (infants, neonates, and ARDS patients). With Hamilton Medical flow sensors, you can measure VTE close to the patient’s airway for a more precise value.

Benefits for you:

  • Proximal placement eliminates the effects of breathing circuit compliance on flow and volume measurements (Cannon ML, Cornell J, Tripp-Hamel DS, et al. Tidal volumes for ventilated infants should be determined with a pneumotachometer placed at the endotracheal tube. Am J Respir Crit Care Med. 2000;162(6):2109-2112. doi:10.1164/ajrccm.162.6.99061121​)
  • VTE measurement is subject to less resistance from the respiratory system (Nève V, Leclerc F, Noizet O, et al. Influence of respiratory system impedance on volume and pressure delivered at the Y piece in ventilated infants. Pediatr Crit Care Med. 2003;4(4):418-425. doi:10.1097/01.PCC.0000090289.98377.153​)
  • Fewer leaks occur that may alter the result (Al-Majed SI, Thompson JE, Watson KF, Randolph AG. Effect of lung compliance and endotracheal tube leakage on measurement of tidal volume. Crit Care. 2004;8(6):R398-R402. doi:10.1186/cc29544​)

Our flow sensor portfolio

We offer Hamilton Medical consumables for adult, pediatric, and neonatal patients. You can choose between reusable and single-use products, depending on your institutional policies.

Dr. Robert Lopez

Customer voices

With Hamilton Medical single-use flow sensors we don't have to worry about them being used again on another patient, which prevents cross contamination.

Dr. Robert Lopez

Director of Respiratory Care until 2018
University Medical Center, Lubbock (TX), USA

Tidal volumes for ventilated infants should be determined with a pneumotachometer placed at the endotracheal tube.

Authors: M L Cannon, J Cornell, D S Tripp-Hamel, M A Gentile, C L Hubble, J N Meliones, I M Cheifetz

Ventilator displayed tidal volume: What you see may not be what you get.

Authors: Gary W Gammage, Michael J Banner, , Paul B Blanch, Robert R. Kirby

Influence of respiratory system impedance on volume and pressure delivered at the Y piece in ventilated infants.

Authors: Véronique Neve, Francis Leclerc, Odile Noizet, Sandy Vernoux, Stéphane Leteurtre, Patricia Forget, Ahmed Sadik, Yvon Riou

Effect of lung compliance and endotracheal tube leakage on measurement of tidal volume.

Authors: Sami I Al-Majed, John E Thompson, Kenneth F Watson, Adrienne G Randolph