Jaya Pokuri
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Oxygen concentrators are
heavily used in developing
world hospitals
Only oxygen concentrators
producing over 90% oxygen
should be used in a clinical
setting
Current oxygen analyzers
(used to measure oxygen
concentration) on the market
cost over $200
Developing world hospitals
have very little money and run
mostly on donations
Standard of care in
developing world
hospitals decreases
Hospitals use oxygen
concentrators that may
not be working
adequately
Hospitals cannot check
oxygen output % from
oxygen concentrators
Developing world
hospitals cannot obtain
oxygen analyzers due
to high cost
No low-cost oxygen
analyzer on the market
How can we provide developing world hospitals
with a low-cost tool to measuring oxygen
concentration at a basic level?
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Differential Pressure Sensors: Detects
pressure difference between ambient air and
output of oxygen concentrator
Zinc-Air Battery: Converts oxygen into
electrical current
Light Sensor: Measures changes in light
reflection with different oxygen
concentrations
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Very affordable- less than
$1 each
Available to purchase in
developing world
countries
Easy to implement with
microcontrollers
Reliable- current values
don’t change with
temperature, humidity,
etc
Current produced varies
linearly with oxygen
concentration
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Zinc-Air Battery in series with a 10 ohm
resistor
Connected to Arduino Uno microcontroller
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Arduino Uno
microcontroller
used to read
voltage
Linearize a few
voltage values with
known oxygen
concentration
values (only done
once)
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Two LEDs
◦ Red for under
90% oxygen
concentration
◦ Green for over
90% oxygen
concentration
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Arduino Uno
Green LED
Red LED
9 V Battery (for Arduino)
Zinc-Air Battery
10 Ω Resistor
9 V Battery Holder
$20.00
<$1
<$1
<$1
<$1
<$1
<$1
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Total=
<$26
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*Cost expected to decrease with mass production*
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BW Portable Oxygen Analyzer
Unicom-Optics Oxygen Analyzer
Vetus Oxygen Analyzer
Lutron Oxygen Analyzer
Beijiaye Oxygen Analyzer
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And many more high priced items…
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$550
$280
$360
$300
$165
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Developing world
hospital staff will be
able to determine if
oxygen
concentrators are
suitable to be used
Improve clinical
standards in
developing world
hospitals and patient
recoveries
1.
2.
3.
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7.
Build prototype
Compare against expensive oxygen analyzers
to test for accuracy
Field test in developing world hospitals
Simplify, improve, and finalize a model
Make a kit containing a manual and all
necessary parts to building the model
Partner with organizations, such as Engineering
World Health and Duke Engage, that work
directly with developing world hospitals
Sell the kits to developed world individuals at a
premium to drive down cost for developing
world hospitals