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Better healing with blue LEDs

Since its invention in the early ’90s, blue-LED technology has found several applications in biochemical and biomedical fields. One is that irradiation with blue light can stop the bleeding of wounds. The absorption of haemoglobin at narrow peaks in the blue range (410 nm and 430 nm for oxygenated and non-oxygenated haemoglobin respectively), showing an absorption coefficient much higher than skin chromophores. The effect can be used to ensure a local temperature increase that is able to induce hemostasis through a photo-thermo-coagulation process.

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