CHI has also developed an add-on device for metered dose inhalers (pMDI) called “q-technology” that addresses two of their current major drawbacks:
  1. patients inhale too quickly
  2. patients are not able to successfully coordinate actuating the device with their inhalation.
The q-technology has been patented and has received interest from several companies who specialise in pMDIs and / or their components. It is the aim of CHI to develop this technology into a clinical prototype in time for clinical studies of new, more environmentally friendly propellants, such as HFA152a.


  • Reduces plastic content
  • Reduces cost
  • Improves flowrate and timing


  • Improves flowrate
  • Improves coordination
  • Provides audible & tactile feedback


  • Improves flowrate and coordination
  • Measures inhalation flowrate profile and other valuable parameters
  • Fully connected for ~$1