The VeinViewer uses harmless, near-infrared green light to show precisely where veins are located and take the guesswork out of the process.
Designed by Memphis-based company Christie Medical Holdings, the device can find the veins and then project them onto the arm in real time as shown in the above picture. The special light can be either absorbed by the hemoglobin in the blood, or reflected back by the skin, and it finds veins up to 0.4 inches deep.
View the below video to find out how it works.
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