Therapy modes, Therapy mode Description

Therapy modes

The following table describes the therapy modes available on the S9 VPAP Tx.

Therapy mode	Description
CPAP (Continuous Positive Airway	Delivers a fixed pressure with optional Expiratory
Pressure)	Pressure Relief (EPR). EPR can improve patient comfort.
AutoSet	Delivers CPAP therapy with optional Expiratory Pressure
	Relief (EPR). Automatically adjusts the CPAP pressure in
	response to snore, flow limited breaths and apneas.
VAuto	Automatically adjusts pressure in response to flow
	limitation, snore and apneas. Pressure Support (PS) is
	fixed throughout the night and can be set by the clinician.
	Min EPAP and Max IPAP restrict the delivered pressure
	range.
Bilevel	Provides for control over a number of related bilevel
	therapy modes—S, S/T and T. In all cases you may set
	two treatment pressures— one for inspiration (IPAP) and
	one for expiration (EPAP). The difference between IPAP
	and EPAP levels is the pressure support.
S (Spontaneous)	Senses when the patient is inhaling and exhaling
	and supplies the appropriate pressures accordingly.
	The difference between IPAP and EPAP levels helps
	determine the tidal volume.
S/T (Spontaneous/Timed)	Augments any breath initiated by the patient, but will also
	supply additional breaths should the patient breath rate
	fall below the clinician's set backup respiratory rate.
T (Timed)	The fixed respiratory rate and the fixed inspiration/
	expiration time set by the clinician is supplied regardless
	of patient effort.
PAC (Pressure Assist Control)	The inspiration time is preset in the PAC mode. There
	is no spontaneous/flow cycling. The inspiration can be
	triggered by the patient when respiratory rate is above a
	preset value, or time triggered breath will be delivered at
	the backup breath rate.
ASV (Adaptive Servo-ventilation)	Treats central sleep apnea and/or mixed apneas and
	periodic breathing. In ASV mode, the expiratory positive
	airway pressure (EPAP) is adjusted by the clinician to
	maintain upper airway patency, while Min PS and Max
	PS restricts the range of automatically adjusted pressure
	support.
ASVAuto (Automatic Adaptive	Treats central sleep apnea and/or mixed apneas and
Servo-ventilation)	periodic breathing. In ASVAuto mode, the expiratory
	airway pressure (EPAP) is automatically adjusted to
	maintain upper airway patency between the limits set
	by Min EPAP and Max EPAP, while Min PS and Max PS
	restrict the range of automatically adjusted pressure
	support.
iVAPS (intelligent Volume-Assured	Maintains a preset target alveolar minute ventilation by
Pressure Support)	monitoring delivered ventilation, adjusting the pressure
	support and providing an intelligent backup breath
	automatically.

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