TeleHealth Module: Difference between revisions

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#REDIRECT [[TeleHealth_Hardware]]
=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 Electrode EKG ==
* Multiple Op-Amps pick up, amplify, and filter electrical impulses picked up by near-heart electrodes.
** Older EKGs used suction based reusable 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 [http://media.maxim-ic.com/images/qv/3760.gif 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.
===Resources===
* http://en.wikipedia.org/wiki/List_of_World_Health_Organization_Essential_Medicines
* http://www.who.int/classifications/apps/icd/icd10online/
* http://www.hesperian.org/publications_download.php
* http://www.medical-dictionary.ro/index.html
* http://en.wikibooks.org/wiki/Human_Physiology
* http://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikislice/Medical
* http://en.wikipedia.org/wiki/THM_:_DB

== Contributors ==
* Ian Daniher
* Zdenek Broz
* Ram Dhurjaty (Simple concept suggested elsewhere)
==Resources==
* http://www.olpcnews.com/use_cases/community/medical_application_community.html



[[Category:Hardware ideas]]
[[Category:Hardware]]
[[Category:Peripherals]]

Latest revision as of 00:27, 21 January 2008