A vein finder is a device that uses optical imaging technology to identify blood vessels. Its working principle is based on the characteristics of near-infrared light. First, the vein finder emits near-infrared light, which can penetrate the skin layer and be absorbed by hemoglobin in the blood. Because blood absorbs near-infrared light strongly, while skin and other tissues mainly scatter light, blood vessels appear darker in the image after light processing, forming a clear contrast with the surrounding tissue. This change in contrast makes the outline of the blood vessels clearer and more prominent in the image.
Next, the photodetector or camera inside the vein finder captures the near-infrared light passing through the skin and generates an image. In order to make the veins in the image more obvious, the system processes and enhances the image. This includes contrast adjustment, image sharpening, and edge detection techniques to improve the visualization of veins in the image. The results of this image processing can help medical staff locate veins more accurately.
The processed images are displayed in real time on the screen of the vein finder, and medical staff can find the location of the veins by observing these images. Some vein finders also project processed images onto the skin surface to more intuitively display the location of the vein, thereby assisting the venipuncture operation. This technology can not only reduce the pain during puncture, but also improve the success rate of puncture, especially when dealing with difficult veins.
Some modern vein finders also combine augmented reality technology to superimpose the vein image directly on the actual field of view, further improving the accuracy of the operation. In addition, new devices may use higher resolution sensors or more complex imaging technology to provide more detailed vascular information.
Qualmedi is a professional vein finder manufacturer in China. We aim to provide humans with better quality but more affordable medical products. Looking forward to your cooperation with us.