TeleHealth Module: Difference between revisions

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=The 10usd 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.
* 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.
⚫
* Good documentation needed, possibly via svg/javascript animations.
* 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 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.
* 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
** See nirdiagnositics.com for other NIR functions
⚫
* The long, time consuming parts
⚫
** Getting approval from governmental and medical organizations.
** Providing an intuitive interface and a pictograph manual.
** Drivers, integration with [[Measure]], and construction of a usable [[TeleHealth Database]].


== 3 Electrode EKG ==
== 3 Electrode EKG ==
* Uses
** This is an excellent way to help children learn about the behavior of the heart.
** Can be a way of prevent and diagnose diseases.
** Can be a way to recognize congenital defects of the heart.

* Key features
** Safety
** Low Cost
** Simplicity of interface
⚫
** Good documentation, possibly via svg/javascript animations.

* How to do it
* How to do it
** The first part is the actual hardware part. A circuit, possibly USB powered, using op-amps, would amplify the signal received by the sensor array(of three to twelve electrodes in contact with the skin, in proximity to the heart), to a level readable by the sound-card.
** The first part is the actual hardware part. A circuit, possibly USB powered, using op-amps, would amplify the signal received by the sensor array(of three to twelve electrodes in contact with the skin, in proximity to the heart), to a voltage usable by an ADC
** The second part is the safety part, when we are dealing with the heart there is a very real risk of causing serious problems via current leakage.
** The second part is the safety part, due to the proximity to the heart, strict regulation of leakage current is needed.
** The third part is adapt [[Measure]] to increase functionality as a [[Telemedicine]] platform.
** The third part is adapt [[Measure]] to increase functionality as a [[Telemedicine]] platform.
*** To increase interface functionality
*** To add software selections for pulse oximeter, EKG, to accommodate the difference in waveform type
*** To add diagnosis functionality
*** To add graphical depictions of biosign activity(heart-beat?)


*Implementation
*Implementation
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** Ram Dhurjaty, a medical device professional who has had substantial experience with EKG amplifiers, has pointed suggested that there are better amplifiers than the AD620.
** Ram Dhurjaty, a medical device professional who has had substantial experience with EKG amplifiers, has pointed suggested that there are better amplifiers than the AD620.
** Dirakx(Rafael Ortiz) is currently in the prototyping phase of an EKG, to incorporate into the THM, as of Nov. 14th of 2007
** Dirakx(Rafael Ortiz) is currently in the prototyping phase of an EKG, to incorporate into the THM, as of Nov. 14th of 2007
** Now we have an excellent way to do an [http://en.wikipedia.org/wiki/Electrocardiogram ECG] measurement, through [[Measure]].

*Extensions
** EEG - Electroencephalography
** EMG - Electromyography
** EOG - Electro-oculography
** SpO2 - Pulse-oximetry.

⚫
The long time consuming part
⚫
* Get approval from the health organizations.



== NIR Diagnosis Aid ==
== NIR Diagnosis Aid ==

Revision as of 03:54, 21 November 2007

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.
  • Good documentation needed, possibly via svg/javascript animations.
  • 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
  • The long, time consuming parts
    • Getting approval from governmental and medical organizations.
    • Providing an intuitive interface and a pictograph manual.
    • Drivers, integration with Measure, and construction of a usable TeleHealth Database.

3 Electrode EKG

  • How to do it
    • The first part is the actual hardware part. A circuit, possibly USB powered, using op-amps, would amplify the signal received by the sensor array(of three to twelve electrodes in contact with the skin, in proximity to the heart), to a voltage usable by an ADC
    • The second part is the safety part, due to the proximity to the heart, strict regulation of leakage current is needed.
    • The third part is adapt Measure to increase functionality as a Telemedicine platform.
  • Implementation
    • Multiple Op-Amps pick up, amplify, and filter electrical impulses picked up by near-heart electrodes.
      • Older EKGs used suction based reusable electrodes, an adaption of these may be best suited for the third world where replacements are scarce.
    • DyD/DyDisMe has schematics for an EKG using AD620A style op-amps.
      • 4.1044-7.3 usd
    • Ram Dhurjaty, a medical device professional who has had substantial experience with EKG amplifiers, has pointed suggested that there are better amplifiers than the AD620.
    • Dirakx(Rafael Ortiz) is currently in the prototyping phase of an EKG, to incorporate into the THM, as of Nov. 14th of 2007

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.
  • Honza Kovar(Jan), from the Czech republic, has acquired development board for the C8051F321 MCU, and will assist with programing and development.

THMDB

TeleHealth Database

Contributors

  • Ian Daniher
  • Honza Kovar
  • Ram Dhurjaty (Simple concept suggested elsewhere)
  • Rafael Ortiz
  • Steve Burns

Resources

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