A fast vein display device based on the camera-projector system

Venipuncture is now a common medical means. Several devices have been developed to aid the paramedics or physicians in locating the vein. There are two problems existing in vein display devices: (1) The vein cannot be shown directly on the skin; (2) The method of displaying the vein on the skin is complex. An approach based on the camera-projector system is proposed to help the paramedics or physicians quickly find the vein for diagnosis and treatment. The proposed approach can solve the two problems and it is easy to be accomplished. A simple system including IR light, an IR camera and a DLP projector is constructed to test and verify this approach. In the experiment, the vein is projected directly on the surface of the skin and the whole process takes only a short period of time. The result of the projection of the vein can meet the requirement of the venipuncture.