Selecting The Proper Flow Setting - Inogen ONE G5 Technisches Servicehandbuch

8. Use the + (increase flow) or – (decrease flow) buttons to adjust the Inogen One G5 to
the flow setting prescribed by the physician or clinician.
For further information regarding the use of the Inogen One G5, please consult the User
Manual.

2.4. Selecting the Proper Flow Setting

2.4.1. Bolus Volumes Specification
All oxygen conserving devices (OCD's) function differently, and therefore it is prudent to
titrate patients for any new conserving device. Delivery timing, bolus volume, and oxygen
concentration all contribute to a patient's fraction of inspired oxygen (FiO
to the OCD's efficacy at maintaining the patient's blood oxygen saturation.
As an oxygen concentrator, the Inogen One G5 does not contain a finite stored volume of
oxygen, such as with compressed gas or liquid cryogenic systems. The Inogen One G5
can provide oxygen to the patient as long as a source of electricity is available. Because
the oxygen is being produced as it is used, supply of oxygen is rate-limited. The Inogen
One G5 delivers up to 1260 ml/min of 90% (+6%/-3%) oxygen.
At each flow setting, the Inogen One generates a specific amount of oxygen (210ml per
setting), and the on-board OCD attempts to deliver all of this product to the patient. This
is equivalent to a conserving ratio of 4.76 at all flow settings and breathing rates. Slower
breathing patients will receive larger boluses, and faster breathing patients will receive
smaller boluses.
DESIGN
NOTE
The following table summarizes the nominal bolus volumes (+/- 15%) delivered by the
Inogen One G5 at 20C and sea level:
Flow
Setting
1
2
3
4
5
6
DESIGN
NOTE
CONFIDENTIAL
96-09302-00-01 rev C
and PROPRIETARY
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.
Flow rate 10 BPM
(ml /min) (ml/bolus)
210 21
420 42
630 63
840 84
1050 105
1260 126
Bolus Volume is tuned to provide the correct bolus volume when delivered
through a nasal cannula such as the Salter Labs 1600SOFT. 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.
DCR 20-328
17 BPM
(ml/bolus)
12
25
37
49
62
74
08-OCT-2020 INOGEN ONE G5 TECHNICAL MANUAL
), and therefore
2
25 BPM 30 BPM
(ml/bolus) (ml/bolus)
8 7
17 14
25 21
34 28
42 35
50 42
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