TeleHealth Module

The 10usd TeleHealth Module

• This low cost, multifunction peripheral will provide a means through which the XO can relay valuable medical diagnostic data from the field to doctors many kilometers away.
• It will compose of a three lead EKG providing valuable information about the heart's electrical status, enabling diagnosis of congenital defects and various arrhythmias.
• It will also contain a multipurpose NIR diagnosis tool whose primary function is that of a pulse oximeter, providing information about the oxygen saturation of the blood.
  • See nirdiagnositics.com for other NIR functions

3 Lead EKG

• Multiple Op-Amps pick up, amplify, and filter electrical impulses picked up by near-heart electrodes.
• DyD/DyDisMe has schematics for an EKG using AD620A style op-amps.
  • 4.1044-7.3 usd

NIR Diagnosis Aid

• Based on the principles of the differences in absorption of oxygenated and non oxygenated hemoglobin
• 800-1000nm light from LEDs are often used in NIR tools
  • The most cited frequencies for IR Pulse Oximetery include 805nm, 910nm, and 940nm.
  • 940nm IR LED; 12.2c per unit
• Red light is generated from similar LEDs.
  • 10-20c per unit
• Light is picked up by photodiodes, converted to current.
• This current is amplified and converted to voltage by a MAX4006 or equivalent chip
  • 1.275 usd

ADC/DAC

• C8051F321 or equivalent chip
  • A/D 5x10b minimum
  • This specific chip provides A/D 13x10b
• alternatively a USB micro-controller may communicate with dedicated ADC/DAC chips via PWM, to lower cost.

THM|DB

• Some talk of a pictograph/text based diagnosis library/activity has been made.
• User:DyD has collected some diagnosis aids used by a local hospital.
• User:ZdenekBroz has been working on a wikislice of relevant medical information.
• A very simple pygtk/xml based activity could be made using if/elseif clauses to mimic a diagnostic flowchart.
• The biggest problem here is legal liability, a hefty disclaimer may be needed.

Contributors

• Ian Daniher
• Zdenek Broz