Various liquid portable options are available:

• Patient fills portable oxygen vessel from stationary reservoir within 2 minutes
• Built-in conserving device available on certain portable units
• Conserver delivers oxygen with every breath
• HELiOS portable delivers oxygen via built-in conserver only - no continuous flow
• HELiOS portable weighs 3.4 lbs filled and lasts approximately 10 hours on 2 liters per minute*
• Companion 550 portable weighs 5.5 lbs. filled and lasts approximately 8.5 hours on demand mode and 4.6 hours on continuous mode on 2 liters per minute*
• Companion 550 easily switches from demand to continuous flow
• Companion 1000 portable weighs 8.1 lbs filled and lasts
  approximately 8.5 hours on 2 liters per minute (continuous
  mode only)*
• No batteries required
• Patient’s insurance coverage and liter flow will determine if an oxygen concentrator is the patient’s stationary source of oxygen when in their home

* Manufacturer's Specifications

A portable oxygen system is covered if the patient is mobile within the home and the qualifying blood gas study was performed while at rest (awake) or during exercise. If the only qualifying blood gas study was performed during sleep, portable oxygen will be denied as not medically necessary.

If coverage criteria is met, a portable oxygen system is usually separately payable.