Medications are injected using pen needles (most commonly to inject insulin in diabetic patients). Pen Needles have a number of advantages over traditional needle and syringe devices, including the ability to help the patient administer the drug themselves and the lack of technical knowledge. Pen needles with the necessary amount of medication are screwed to injection pens through plastic hubs. Through the pen, this is injected. Depending on the length and gauge, multiple pen needle sizes are available. The available lengths are 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, and 12 mm. Pen Needles thickness is determined by gauge size; the greater the gauge number, the thinner the thickness. Pen needles come in several gauges, including 29G, 30G, 31G, and 32G. The most modern pen needles are ultra-fine needles, which are painless and penetrate the subcutaneous layer beneath the skin most effectively. If larger needles, such as those measuring 8 and 12 millimetres, are not inserted correctly, however, they run the risk of penetrating the intramuscular layer. Pharmaceutical companies are progressively introducing new diabetes medicines, like GLP analogues. These GLP-1 analogues are delivered using pen needles in a way similar to how insulin is. For instance, the once-weekly GLP-1 analogue semaglutide was approved by the FDA for Novo Nordisk in October 2017. GLP-1 analogues are also becoming more and more popular among patients who are fat. For example, the GLP-1 analogue liraglutide has already received market approval for the treatment of obesity. For use with various pen injection devices, Becton, Dickinson and Company unveiled the BD Ultra-Fine micro pen needle in 2017. With this product, diabetics are less likely to unintentionally inject their insulin dose into a muscle and it comes with one of the shortest pen needles available. Other elements, such as patients' growing consciousness of pen needles' convenience. Types of Pen Needles-
For the subcutaneous administration of insulin, sterile, single-use pen needles are designed to be used with a pen injector device. They are frequently used by diabetics who frequently need several daily insulin injections. The typical type 1 diabetic patient administers 1460 shots annually*. Don't forget to pay attention to the choice of tiny needles that are fastened on to the top of the pen device if you now use an insulin pen or are considering starting to use one. One of the most underappreciated and under discussed diabetes supplies, although being essential for insulin pen users, are these tiny, sharp needles in plastic cases. It can be frightening for someone who has just been diagnosed to consider having to inject themselves with insulin several times each day. But bear in mind that insulin needle diameters have decreased significantly over the years, particularly for the tiny needles designed to screw onto the tip of insulin pens. The length and gauge of insulin pen needles range from 4 to 12 millimetres (mm) and 29 to 32 gauge, respectively. Keep in mind that in this situation, the needle will be shorter the lower the "gauge" value in millimetres. Additionally, the needle will be thinner with a greater gauge. Since human skin is on average about 2 mm thick, even the shortest 4 mm pen needles will get through it to efficiently deliver insulin.
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