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INTRODUCTION
How Pulsedose Works
PulseDose dramatically extends the use time from a supply of oxygen, offering increased mobility with
improved comfort and increased efficiency. The reliability and safety of PulseDose oxygen delivery has been
proven effective in clinical testing as well as through independent tests performed by physicians and
respiratory therapists.
What is PulseDose? The concept is based on the fact that the normal breathing pattern is inhalation for 1/3 of
the time, and exhalation about 2/3 of the time. At 20 BPM the oxygen delivered in continuous flow, assuming
inspiration is 1/3 of the breathing cycle, would be 16.5 cc/LPM. As a result, PulseDose extends the use time of
an oxygen system by an average of 3:1. PulseDose senses the start of inhalation and instantly releases a
short "pulsed" dose at the very beginning of the breathing cycle. Since all of the "pulsed" oxygen finds its way
deep into the lungs, less oxygen is required to accomplish the same effect than with traditional continuous flow
oxygen systems. This means that a PulseDose oxygen system will last two to four times longer than a
continuous flow oxygen system, yet still provide the same therapeutic benefit.
Because oxygen is released only during inhalation, the constant flow of oxygen into the nostrils is eliminated.
Many users find PulseDose oxygen delivery more comfortable than continuous flow delivery systems. The
short "pulse" of oxygen delivered during inhalation is almost undetectable, and the humidity in the room air
helps maintain a normal level of moisture in the nasal cavity. This greatly reduces the discomfort of
dehydration associated with a continuous flow oxygen system.
Because PulseDose responds to each individual's breathing patterns, the use time will vary for each individual
depending on the PulseDose prescription rate and the breath rate. The following chart shows the theoretical
ambulatory ranges for DeVilbiss PulseDose products.
NOTE– All ambulatory ranges are calculated assuming a breath rate of 20 breaths per minute in PulseDose
(PD) mode.
USE TIMES SHOWN IN HOURS
DeVilbiss Volume cc's
Flow Rate
Walkabout Mini M-6 Cylinder
164 Gaseous Liters
Hideaway ML-6 Cylinder
170 Gaseous Liters
Walkabout 1 "C" Cylinder
240 Gaseous Liters
Walkabout 2 "D" Cylinder
415 Gaseous Liters
Walkabout 3 "E" Cylinder
682 Gaseous Liters
CF=Continuous Flow PD=PulseDose
Specifications subject to change without notice. This chart is intended to be used only as a guide.
Cylinders vary in gaseous liter capacity by manufacturer which may result in varying use times.
SE-1000
16.5
24.75
33
1
1.5
2
2.7
1.8
1.4
8.3
5.5
4.1
2.8
1.9
1.4
8.6
5.7
4.3
4.0
2.7
2.0
12.1
8.1
6.1
6.9
4.6
3.5
21.0
14.0
10.5
11.4
7.6
5.7
34.4
23.0
17.2
41.25
49.5
66
2.5
3
4
1.1
.9
.7
3.3
2.8
2.1
1.1
.9
.7
3.4
2.9
2.1
1.6
1.3
1.0
4.9
4.0
3.0
2.8
2.3
1.7
8.4
7.0
5.2
4.6
3.8
2.8
13.8
11.5
8.6
82.5
99
5
6
Mode
.6
.4
CF
1.7
1.4
PD
.6
.5
CF
1.7
1.4
PD
.8
.7
CF
24
2.0
PD
1.4
1.2
CF
4.2
3.5
PD
2.3
1.9
CF
6.9
5.8
PD
EN - 5
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