CONFIDENTIAL and
PROPRIETARY
96-02735-00-01 revC
INOGEN ONE G2 OXYGEN CONCENTRATOR
TECHNICAL MANUAL
Page 8 of 20
Slower breathing patients will receive larger boluses, and faster breathing patients will
receive smaller boluses.
DESIGN
NOTE
This method of bolus volume determination is similar to what is experienced by a
patient using a continuous flow concentrator – actual alveolar oxygen inspiration
is more closely linked to flow setting than to breathing rate.
In general, the Inogen One G2 delivers 12ml per bolus per flow setting at 15 breaths per
minute (180ml/min per flow setting). The following table summarizes the bolus
volumes delivered by the Inogen One OCD at 20C and Sea Level:
Flow
setting
Flow Rate
(ml +/- 10%)
180
min
nominal
max
min
nominal
max
min
nominal
max
1.0
180
16.2
18.0
19.8
8.1
9.0
11.6
6.5
7.2
7.9
2.0
360
32.4
36.0
39.6
16.2
18.0
23.3
13.0
14.4
15.8
3.0
540
48.6
54.0
59.4
24.3
27.0
34.9
19.4
21.6
23.8
4.0
720
64.8
72.0
79.2
32.4
36.0
46.6
25.9
28.8
31.7
5.0
900
81.0
90.0
99.0
40.5
45.0
58.2
32.4
36.0
39.6
10 BPM
(ml +/- 10%)
20 BPM
(ml +/- 10%)
25 BPM
(ml +/- 10%)
DESIGN
NOTE
Bolus Volume is tuned to provide the correct bolus volume when delivered
through a nasal cannula such as the Salter Labs 1600Q. If bolus volumes are
measured without a cannula or with a different type of nasal cannula, bolus
volumes will vary from values stated in the table above.
2.4.2.
Trigger sensitivity
The conserver will trigger when the negative pressure at the internal sensor reaches
approximately -0.12 cm H
2
0. This low trigger sensitivity allows for breath detection of
very shallow breathing, but may also result in the occasional trigger due to motion of
the cannula or motion of the concentrator.
2.4.3.
Flow Setting Selection Relative to Physician Prescription
Inogen has labeled each of the five settings to provide a
guideline
for matching the
setting of the device to the continuous flow prescription issued by the physician.
Actual correlation is dependent upon the patient’s breathing rates, inspiratory tidal
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