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Category: General
Nov 13, 2016

Respiratory Gas Monitoring for Small Animals


The monitoring of expired gas has long been known to be an important indicator or the physiological health of experimental animals. CWE Incorporated offers a range of gas analysers for different respiratory physiology applications.


  • For routine monitoring of CO2, the CapStar-100 End-Tidal CO2 Analyser is the most popular.
  • The new microCapStar is specifically designed for mice and other very small animals.
  • The GEMINI Respiratory Monitor features both CO2 and O2, as well as respiratory rate measurement.

CapStar-100 Carbon Dioxide Analyser:

Provides continuous measurement of expired CO2 over the range 0-10 percent. Its rapid response time, small sample flow requirements, and long-term stability make it ideal for respiratory gas measurement of rodents and larger animals.

MicroCapStar Co2 Analyser:

Provides accurate end-tidal or continuous measurement of expired CO2 in animals as small as mice. It features very low sample flow requirements, rapid response time, and long-term stability. Respiratory rate (RR) is computed using the excursions of the CO2 waveform. The CO2 and RR measurements, as well as a trend plot of the end-tidal values, are displayed on the graphics LCD screen.

Gemini Respiratory Monitor:

Accurately measures breath-by-breath O2 & CO2 concentration, it has long-term stability, linear output voltage, adjustable CO2 and respiratory rate alarms and is also suitable for rats & larger animals.

Applications and benefits:

  • use in conjunction with a CWE Ventilator
  • metabolic measurements (O2 consumption)
  • hypoxia and control-of-breathing studies
  • CO2 monitoring improves animal survivability
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