How To Use Your H850 Personal Oxygen System28 H850 Home Use GuideBreathing From the H850 PortableIn order to breathe from your H850 Portable, you must doso through a dual-lumen nasal cannula. The nasal cannulahas two connections at the H850 Portable. One connectionis used to sense when you inhale, the other connection isused to supply oxygen into your nose as you inhale.Connect a dual-lumen cannula to your H850 Portable asfollows:1. Attach both ends of the dual-lumen cannula to theH850 Portable as shown below. Either end of thedual-lumen cannula may be attached to eitherconnector on the H850 Portable (Figure 5).Figure 5: Attaching the dual-lumen cannulaNote: The lower connector is used to sense when youinhale. The upper connector is used to supplyoxygen to your nose.