Operating Information; Principles Of Operation; Features - ResMed S8 Elite System Clinician Manual

338210r3 Eng.book Page 13 Monday, July 11, 2005 1:28 PM
O
PERATING
P O
RINCIPLES OF PERATION
The system is designed for clinical use and home treatment of adult patients
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with obstructive sleep apnea (OSA). The
pressure room air via tubing to the mask worn by your patient. The continuous air
stream "splints" open the upper airway, preventing airway collapse.
The delivers pressure within the range 4 to 20 cm H
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patency of the upper airway. To make the beginning of treatment more comfortable,
you may set a ramp so the pressure starts low and gradually increases to full treatment
pressure over the ramp time.
E P
XPIRATORY RESSURE
Note: EPR may not be available in all regions.
In the , you can select expiratory pressure relief (EPR). EPR is designed to
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maintain optimal CPAP treatment for the patient during inhalation and reduce the
delivered mask pressure during exhalation. The desired result of EPR is to decrease the
pressure the patient must breathe out against, making the overall CPAP therapy more
comfortable.
The features of EPR are:
EPR is disabled automatically in the event of an apnea.
•
EPR resumes automatically when the apnea event has passed.
•
You can select an EPR pressure drop of OFF, 1, 2, or 3 cm H
•
You can set EPR to be off, delivered only during ramping, or delivered throughout
•
therapy.
Pressure drop is limited, to avoid sub-optimal treatment (maximum drop is
•
3 cm H O).
2
When EPR is enabled, the delivered pressure will not drop below a minimum
•
pressure of 4 cm H
EPR setting is 3.
Either the clinician alone, or both the clinician and the patient can access the EPR
•
setting. You can enable or disable patient access to the EPR setting.
Note: When EPR is enabled, detection of apneas and hypopneas may become less
reliable at high levels of leak (> 0.4 L/s — 24 L/min).
I
NFORMATION
R
ELIEF
O, even if, for example, the set pressure is 6 cm H
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device provides fixed-positive-
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O, depending on the
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O.
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O
PERATING
O and the
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I
NFORMATION