Prototype with two wavelengths to locate the venipuncture site

Venipuncture is often performed in health care for collecting blood samples or infusion of medications. Up to about 20% of venipuncture is unsuccessful on the first attempt, often due to difficulty in locating veins. The prototype developed aims to facilitate the visualization of veins in the upper limbs. A luminous device was made using two monochromatic waves of light (620–750 nm and 495–570 nm) simultaneously. Each wave on a Y prototype arm. The usability and utility of the prototype was tested using the System Usability Scale with answers based on the Likert scale applied to volunteer users. The veins were located in two groups of patients: patients with normal body mass index (BMI) and with BMI> 35. On the Bangor scale, the usability of the prototype was classified as A and on the Lewis &Sauro scale as A +. There was no statistical difference (p <0.05) in the time to identify the vein between the groups. Regardless of the body mass index, more than 90% of the venipuncture sites identified obtained maximum scores. In conclusion, the use of two waves of light simultaneously is easy to use with utility in locating the ideal vein for puncture.