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The idea of using light reflection instead of light transmission in clinical oximetry shows that SpO2 can be monitored by measuring the amount of light reflected from the tissue. The idea of using skin reflectance spectrophotometry marked a significant advancement in the noninvasive monitoring of SpO2 from virtually any point on the skin surface.
The intensity of the back scattered light from the skin depends not only on the optical absorption spectrum of the blood but also on the structure and pigmentation of the skin. SpO2 is measured be analyzing the pulsatile componens of the detected red and infrared plethysmograms which make use of reflected light intensities. The light from the LEDs enters the tissue, is scattered by both the moving red blood cells and the nonmoving tissue, and a part of this back scattered light is detected by the photodiode.
The output of photodiode is processed by the pulse oximeter, and measures the SpO2 of the pulsatile blood. In reflectance pulse oximetry, the LEDs and the photodiode are placed on the same side of the skin surface as shown below. Normally the reflectance probe is placed on the forehead or temple, but is not restricted to only those two places. Reflectance probes can be used to measure arterial oxygen saturation at virtually any place the human body where the probe can be placed.
DCM08 developed by APMKorea is a sensor integrated built in LEDs and PD together with optimized properly against such trade-off to get proper parameters. Furthermore DCM08 has SMD type package so that user could interconnect easily wire or flip bonding into your set.
This reflectance sensor can be placed on the body where you can expect light reflection due to tissue.
Features
Applications
Absolute MAX. Ratings(Ta=25°C unless otherwise noted)
Symbol
|
Parameter
|
Max. Rated Value
|
Units
|
PD
|
Power Dissipation
|
120
|
mW
|
IF
|
Continuous Forward Current
|
50
|
mA
|
IFR
|
Peak Forward Current
|
100
|
mA
|
VR
|
Reverse Voltage
|
5
|
V
|
T stg
|
Storage Temp.
|
-20~+85
|
°C
|
T opr
|
Operating Temp.
|
-20~+85
|
°C
|
T sd
|
Soldering Temperature *1
|
240
|
°C
|
*1. Test Condition : t<3s |
Characteristics(Ta=25°C unless otherwise noted)
PPG(Photo Plethysmogram) Characteristic
Registration Date | 2010/03/21(Year/Month/Date) |
---|---|
Buyer / Seller in EC21 | Seller |
Business Type | Manufacturer |
Year established | 2008 |
Employees total | 1 - 5 |
Annual revenue | USD 500,001 - 1,000,000 |
Company | APMKorea |
---|---|
Address | 201Suga2, 52SongnimroYouseong guDaejeon34098Korea |
Phone | 82 - 70 - 82027805 |
Fax | 82 - 505 - 8207805 |
Homepage | http://www.apmkr.com |
Contact | Shoon Han / President |