With those that suffer from OSA, bilevel positive airway pressure is used in the following situations:

1. Non compliance to a standard CPAP pressure.  The pressure "seems too high". 
2. Unresolved hypoventilation (hypopnea) on standard CPAP.

Spontaneous Bilevel   This device moves from a starting pressure called EPAP (expiratory positive airway pressure) to a peak pressure called IPAP (inspiratory positive airway pressure).  This pattern occurs whenever the patient spontaneously triggers the machine to change pressures from EPAP to IPAP.  If a breath is not taken, the machine remains at EPAP.

Auto Bilevel  Variable pressure device capable of delivering a range of pressures from 4-25cmH20 for both EPAP and IPAP. The machine can adjust or move the pressure based upon your airway obstruction. Auto Bilevels use flow to determine:

•  apnea
•  hypopnea (shallow breathing)
•  snoring
•  flow limitation (the start of an obstructed airway

Auto Bilevel with Servo Ventilation  Bilevel technology designed specifically to treat central sleep apnea (CSA) in all forms including complex and mixed sleep apnea.   Central  apnea is defined as no airflow with no chest wall movement.  CSA becomes complex sleep apnea when central apnea emerges as a result of CPAP or Bilevel therapy.