The Peaceful Pill eHandbook The R2D DeBreather Design Modification
In May 2020, a handful of reports were received of unexplained failures using the R2D ReBreather device.
At this time the inventor informed Exit that a number of design modifications of the device would take place. These improve- ments, and the production of video teaching material for the R2D’s effective use, were considered essential in order to prevent further instances of unexplained failure.
Possible causes of failure include:
• A user with chronic respiratory failure, high ambient CO2 and respiratory acidosis. In this situation effective removal of the CO2 respiratory drive could cause breathlessness and panic.
• Small tidal volume of the user compared with the dead space of the R2D. In this case there would be ineffective CO2 re- moval.
• Leaking canister seals and damage/ contamination of the scrubber.
• Leaking face mask or counter lung seals. • Anxiety precipitated panic attack by the user with associated breath holding.
The successful use of the R2D DeBreather was always inevitably technique dependent. The ability to practice fitting and using the device with the scrubber removed and the counter-lung open to the air, would also be particularly useful.