Oxygen Concentrator
Technical Service Manual
| PN 20631679 Rev G
15
CONTINUOUS FLOW MODE
Continuous Flow Mode delivers a constant flow of oxygen to a patient by means of tubing and a nasal cannula at
rates between 0.5 LPM and 3.0 LPM. Within the Eclipse 5, concentrated oxygen is stored in a 500ml product tank
at pressures in the range of 5 to 9 psi. This pressure gives Continuous Flow Mode the capability to deliver the
indicated flow rate to the patient even if extension tubing is used, up to 50 feet long. In addition, the Eclipse 5
Continuous Flow Mode is fully compatible with humidifier use, with NC not exceeding 7 ft.
PULSE DOSE MODE
The Eclipse 5 Pulse Dose Mode delivers a measured bolus of oxygen at the very beginning of each inspiration.
The approach is based on the manner in which gas is absorbed into a
patient’s airway. Eclipse 5 users may select
pulse dose volume delivery rates. Regardless of setting, the pulse profile is a simple square-wave pulse based on
a 16 mL volume. (Refer to
“Pulse Profiles” table below). Pulse durations are no less than 100 milli-seconds at the
beginning of the inspiration. There are three Rise Time settings (Slow, Medium, and Fast). The table below is for
the FAST Rise Time setting (factory default is Fast).
Flow
Setting
Pulse Peak Flow, LPM
(volumetric)
Pulse Duration
(milli-second)
Bolus Volume
(ml)
1.0
8
120
16
2.0
9
213
32
3.0
10
288
48
4.0
11
349
64
5.0
12
400
80
6.0
13
443
96
7
15
512
128
8
17
565
160
9
19
606
192
Pulse Profiles
The fundamental approach to triggering and controlling the oxygen bolus in Pulse Dose Mode is as follows:
The User may select a pulse trigger sensitivity in settings ranging from 1-3. Bolus volume should be prescribed
by a physician and may range from 16mL up to 192mL. The pulse will be triggered when the system meets all of
the following criteria:
•
The cannula pressure has dropped below the trigger point (typically between 0.135 and 0.37 cm H
2
0)
•
At least 1¼ seconds has passed since the last pulse began
