EIS Specifications
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The EIS System together with computer complies with norm EN60601 as an programmable electro medical system(PEMS).
The computer is external to the patient environment and therefore complies with its own norm IEC 60601 |
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Computer Specifications
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| Windows |
XP & Vista |
| Apple Mac Systems |
Currently Intel Mac only |
| Processor |
Pentium M Intel Core Duo Processor or higher
1.80 GHz or higher |
| Ram |
512 RAM (XP Home or Professional)
2 Gig RAM (Windows Vista) |
| Hard Disc |
80 Gig |
Graphics Card
(Please ensure your graphics card has it's own memory)
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NVIDIA GeForce Go
7300, 7400,7600,7800,7900, 7950 ...
ATI Mobility Radeon X300,X600,X700,X800,X1300,X1400,X1600
Intel
915, 945, 965
The following Video Cards are NOT compatible:
ATI Radeon Xpress
200, 200M, 1100, 1150, 1200, 1250
NVIDIA Go
< 7300 & other manufacturers |
| Screen Size |
Any |
| Screen Resolution |
1024 X 768 or 1280 X 800 |
| Accessory Software |
MS Word, WordPad or Open Office |
| Accessory |
USB Ports 2.0 |
| Accessory |
CD or DVD-ROM |
| Accessory |
Audio |
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| The EIS System is a Programmable Electro Medical System (PEMS) including: |
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| 1. THE HARDWARE |
The hardware is configured as a USB "plug and play" device; the power supply of the box is transmitted via the USB port of the computer; the computer recognizes the hardware due to the driver fdt2xx.dll which is incorporated in the installation disc which is then copied to the windows directory WINDOWS/SYSTEM.
Each time the hardware is connected to the PC, it will appear on the list of USB hardware installations and then when it is disconnected, it disappears from the respective list. |
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| Technical Specifications : |
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| Functioning Speed (per second) |
50000 |
Tension of the electrodes, in DC operating mode
Intensity in operating mode |
1,28 v 200 micro A
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| operating mode |
D.C/ 1KHz/50 KHz |
| Speed transmission |
12Mbd |
| Galvanic decoupling of the analogical part. |
4 KV |
| Dimensions in mm |
128 x 143 x 33 |
| Weight kg |
1.2kg |
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| Accessories : |
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| Cables (armoured type) |
Audio |
| Cable length in meters |
2m |
| Cable connectors |
Red connector: Left electrode
Black connector: Right electrode |
| USB cable length in meters |
2m |
| Reusable and tactile hand electrode /polished stainless steel : size in cm2 |
272cm2 |
| Reusable and tactile feet electrodes in polished stainless steel : size in cm2 |
330cm2 |
Electrodes for single use:
Ag Ag Cl :size in cm2 |
1.75cm2 |
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The design of The EIS hardware is composed of a receiving USB circuit and a circuit of converters placed on the same chart which is separated by a galvanic decoupling.
This chart is installed in the black EIS box . |
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| The front panel includes : |
- 1 green LED indicating PC pilot light/ control / hardware recognition.
- 1 yellow LED indicating PC pilot light/ control / hardware recognition.
- 1 green LED indicating the power supply
- 1 RCA connector which is for the "head electrodes".
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| The back panel includes : |
- USB-A port
- 4 RCA 'HEAD' "HAND" "FOOT" "TEST"
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| 2. THE SOFTWARE |
| The data-processing program comprises of 3 main components: |
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2.1 To Control The Correct Operation of The Black Box:
2.1.1 To test the power supply
2.1.2 To test the respective channels
2.1.3 To test the laterality and correspondence of the volumes
2.1.4 To test the cables
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| 2.2 To modulate the tension, sequence and time of the measurements |
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Each examination takes 22 measurements 7 times:
During the first measurement , the software controls the hardware in sending a frequency between the electrodes of right hands and right feet with an imposed intensity of 425µA with a 50KHz frequency. |
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| For the second (22secs) and third measurements (66secs) the software controls the hardware in sending a 1.28V DC current imposed tension of 1 second per volume and then 3 seconds per volume between the electrodes. |
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The tension during the DC current is transmitted in a chronological way between the negative and positive electrode and according to the programmed sequence: 2, 10, 4, 11, 6, 14, 7, 16, 17, 19, 22, 1, 9, 3, 12, 5, 13, 8, 15, 18, 20, 21
Thus, the electrodes will alternate between a cathode and as an anode and will record 22 tissue volumes located between the respective electrodes. |
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| The hardware transmits via the USB ports the intensity measurements (32 measurements in 1 second and 255 measurements in 3 seconds) in numerical form to the data-processing program. |
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| 2.3 Application of the mathematical formulas and predictive equations |
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| Program/ Design Specification |
| Coding Language: C++ |
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| External programs utilized |
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Compilers:
1) Borland C++ 5.0
2) Microsoft Visual C++ (Visual Studio 2003) |
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3D Design Program:
AutoDesk Inc. 3D Studio MAX 7.0
STATISTICA version 7.0 |
