There is a method for vascular detection - using a vein finder imaging device to improve the success rate of needle insertion

We all have experiences of going to the hospital for injections, blood draws, and infusions, and the feeling of needles piercing blood vessels is uncomfortable. In fact, for nurses and doctors, getting injections for patients is not an easy task, especially for children or elderly people. Because children and elderly people have one thing in common, their blood vessels are not easy to find! How to accurately needle blood vessels without knowing where they are? To reduce the pain of patient puncture, our hospital has recently introduced a vein viewer device, which is a one click operation method for vascular detection. It is simple, portable, and highly operable, improving the success rate of puncture.

Have you ever encountered a tense situation where blood vessels cannot be found during emergency treatment of a sick child? Have you ever encountered the embarrassing scene of an obese child being examined all over their body but unable to find blood vessels no matter what? Have you ever encountered the helplessness of a newborn parent's first words being 'you want to hit it all at once'?

No matter how professionally trained or technically advanced you are, there will always be difficulties in finding veins during puncture.

vein display device

The application of intravenous infusion therapy is a basic operational technique in clinical nursing. Conventional venipuncture belongs to blind puncture method, and the determination of venous vessels mainly relies on three methods: visual, tactile, and anatomical positioning. However, due to differences in individual skin tone, fat thickness, and vascular distribution during operation, venipuncture may be difficult and may fail. Therefore, visual venipuncture technology is the most feasible method to improve the success rate of venipuncture. It can not only increase the success rate of venipuncture, but also shorten the time to start intravenous infusion, quickly locate the venipuncture under extreme factors, and even save a person's life. Our portable vein viewer is a "artifact" for detecting and displaying blood vessels generated by the collision of optics and medicine. It uses far red light to illuminate the surface of the human body, as deoxyhemoglobin in venous blood vessels has a stronger ability to absorb infrared light than surrounding tissues. Under naked eye, the superficial veins on the surface of the body appear in clear shadows in front of the observer, improving the efficiency of venipuncture. For patients, having a venous display device avoids multiple punctures and reduces their pain; For nursing staff, using a venous imaging device to detect blood vessels gives them more confidence when inserting needles. This greatly improves the work efficiency of nursing staff and is suitable for vascular detection and vein search in the vast majority of populations such as infants, the elderly, dark skinned individuals, obese individuals, and cancer patients.

The venous imaging device can emit mixed light of special wavelengths to display the thickness, direction, and layout of the patient's veins in real time, without causing any damage to the human body. It is most commonly used in the palm, foot, arm, and ankle. It makes the very difficult puncture easy, accurate, and fast, making the puncture comfortable and safe, greatly improving the success rate of the first venipuncture, shortening the venipuncture time, and greatly improving the satisfaction of parents. Despite its petite size, it can not only help nurses detect peripheral blood vessels that are difficult to detect with the naked eye, but also serve as a fixed light source for emergency lighting.

（1） The Development of Venous Vessel Display Devices

Over 100 years ago, technicians began developing various techniques to make human veins clearly visible. The first invention was thermosensitive stickers: due to the higher temperature of human venous blood compared to the skin surface, using certain thermosensitive color changing substances to stick on the surface of the arm can make the veins visible. But this method requires that it must be used under sterile conditions, as the usage conditions are too demanding and cannot be widely applied. The second invention is the light source reflection direct observation device: when a light source is irradiated on the back of the hand, deoxyhemoglobin in the veins absorbs the light, so the color of the veins is darker than the surrounding area. But this technology is suitable for people with lighter skin color, and the effect of using it is very poor for people with darker skin color. The latest infrared vein display device is a non-invasive and radiation free instrument that utilizes the principle that hemoglobin in blood vessels has a different absorption rate of infrared light compared to other tissues. Subcutaneous veins that are difficult to observe with the naked eye can be observed through the display device. This infrared imaging device can assist medical staff in venipuncture.

（2） Principle of Infrared Venous Vessel Display Device

The principle of the infrared vein display device is designed based on the principle that deoxyhemoglobin in the vein absorbs near-infrared light more strongly than surrounding tissues.

（3） Classification of Infrared Venous Vessel Display Devices

The infrared vein display device is divided into screen display mode, real-time projection display mode, and handheld projection display mode according to its display mode.

（4） Clinical Application of Infrared Venous Vessel Display Device

The establishment of venous access is a crucial clinical treatment method for achieving fluid supply and drug delivery.  However, due to the different vascular conditions of patients, such as subcutaneous tissue, vascular filling, elasticity, curvature, and thickness, it is difficult to obtain accurate and comprehensive evaluation through the naked eye alone.  In addition, subjective factors such as poor patient compliance and insufficient nurse puncture experience increase the risk of puncture.  Using an infrared vein display device to identify the location of peripheral veins can help make informed decisions regarding vein selection.  It projects the superficial veins that are invisible to the naked eye into the skin surface in situ and indicates the depth of the blood vessels, improving the accuracy of evaluation and providing reference for the selection of puncture angles, thereby optimizing the venipuncture plan.  When the blood vessels are visually displayed on the patient's skin surface, the patient can also understand the objective conditions of their own blood vessels, facilitating communication between nurses and patients, improving patient compliance, and bringing the nurse patient relationship closer.  The infrared vein display instrument uses near-infrared light, and the light source does not produce radiation or heat, which can effectively prevent the instrument from harming the skin and eyes of children (as shown in the figure below), especially suitable for infants and young children.  In peripheral venipuncture, infants and young children are a special group.  Due to their young age, immature blood vessel development (small blood vessels, poor filling), thick subcutaneous fat, large individual differences in blood vessel distribution, and poor compliance during puncture, venipuncture has always been a nursing challenge.  How to improve the success rate of the first puncture has become an urgent problem that pediatrics needs to solve.  The application of infrared vein display device has alleviated the pain of pediatric patients and is of great importance in reducing medical disputes and improving the satisfaction of their families.