Combined thermometer/otoscope
device providing dual
functionality with no external
power source for developing
world hospitals
Danielle Dorfman
Deafness in the Developing World
Hearing impairment refers to complete or partial loss of the ability to hear from
one or both ears. The level of impairment can be mild, moderate, severe or
profound.
There are two types of hearing impairment, defined according to where the problem
occurs: Conductive hearing impairment and sensorineural hearing impairment.
Deafness in the Developing World:
Statistics
• According to 2005 estimates by the World Health
Organization (WHO), 278 million people worldwide have
moderate to profound hearing loss in both ears.
• 80% of deaf and hearing-impaired people live in low- and
middle-income countries.
• Chronic middle ear infection is the main cause of mild to
moderate hearing impairment in children.
• The impact of hearing impairment on a child's speech,
language, education and social integration
• 50% of deafness and hearing impairment is avoidable
through prevention, early diagnosis, and management.
Temperature Reading
• A rise in temperature is one of the simplest
indications that a patient may be sick.
• Many hospitals still use mercury-based
thermometers that can break, potentially
causing an additional health hazard.
• Liquid thermometers also require a longer
time to read, which can delay diagnostics.
Circuit Diagram
Otoscope/LM35DT Combination
Temperature Sensor – LM35 Series
From the Data Sheet…
Power Source and Casing
• I am hoping to incorporate crank power
into the design, but have not found a
reliable crank power design
• The outer shell of the device will enclose
the circuit board and switch and will have
a crank attached
Possible Partnerships/Grants
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Partners for a Greater Voice
Global Deaf Connection
Deaf Africa Association
Quota International
Deaf Child Worldwide