Types Of Auto Injectors

[Vikki Nagindas]

Anautoinjector (or auto-injector) is a medical device designed to deliver a dose of a particular drug. The injectors were initially designed to overcome the hesitation associated with self-administration of the needle-based drug delivery device.

Most autoinjectors are one-use, disposable, spring-loaded syringes (prefilled syringes). By design, autoinjectors are easy to use and are intended for self-administration by patients, or administration by untrained personnel. The site of injection depends on the drug loaded, but it typically is administered into the thigh or the buttocks.

Designs exist for both intramuscular and subcutaneous injection. Disposable autoinjectors commonly use a pre-loaded spring as a power source. This spring and the associated mechanical components form a one-shot linear actuator. When triggered the actuator drives a three-step sequence:

Some injectors are triggered by simply pushing the nose ring against the injection site. In these designs, the protective cap is the primary safety. Other designs use a safety mechanism similar to nail guns: The injection is triggered by pushing the nose ring against the injection site and simultaneously, while applying pressure, pushing a trigger button at the rear end of the device.

Since spent autoinjectors contain a hypodermic needle, they pose a potential biohazard to waste management workers. Hence the protective cap is designed not only to protect the drug and keep the needle sterile but also to provide adequate sharps waste confinement after disposal.

Injectors intended for application through layers of clothing may feature an adjustable injection depth. Other typical features include: A drug inspection window, a color-coded spent indicator, and an audible click after the injection has finished.

Another design has a shape and size of a smartphone which can be put into a pocket. This design also has a retractable needle and automated voice instructions to assist the users on how to correctly use the autoinjector. The "Auvi-Q" epinephrine autoinjector uses this design.[7]

A newer variant of the autoinjector is the gas jet autoinjector, which contains a cylinder of pressurized gas and propels a fine jet of liquid through the skin without using a needle. This has the advantage that patients who fear needles are more accepting of using these devices. The autoinjector can be reloaded, and various doses or different drugs can be used, although the only widespread application to date has been for the administration of insulin in the treatment of diabetes.[8][9]

There are three main types of adrenaline auto-injector which are prescribed in the UK; EpiPen, Jext and Emerade. Emerade is the most recent single use adrenalin auto-injector to become available in the UK. All are disposable, pre-filled automatic injection devices.

The Emerade website has useful information and resources for patients as well as their famiy and friends. There is an expiry reminder service where you can register your pen tso that you can be sure to re-order one before it goes out of date. There is also a free mobile app which includes instructions for Emerade as well as symptoms of anaphylaxis.

While auto-injectors are designed to be easy to use, parents and caregivers who may need to use one on a child should be trained by a medical provider at least once a year. When using an auto-injector, remember to follow the instructions printed on the package.

Push the end with the needle firmly against the side of the child's thigh, about halfway between the hip and knee. Inject the medicine into the fleshy outer portion of the thigh. Do not inject into a vein or the buttocks.

Remove the needle by pulling the pen straight out. A protective shield will cover the needle as soon as it is removed from the thigh. Put the injector back into its safety tube. Give it to EMS when they arrive.

Place the black end firmly against the side of the child's thigh, about halfway between the hip and knee. Inject the medicine into the fleshy outer portion of the thigh. Do not inject into a vein or the buttocks. Hold the leg firmly in place before and during the injection.

Remove the needle by pulling the Auvi-Q straight out. A protective shield will cover the needle as soon as it is removed from the thigh. Put the Auvi-Q back into its case. Give it to EMS when they arrive.

Place the red tip firmly against the side of the child's thigh, about halfway between the hip and knee. Inject the medicine into the fleshy outer portion of the thigh. Do not inject into a vein or the buttocks. Hold the leg firmly in place before and during the injection.

Medical devices such as auto-injectors, safety devices and pens contribute to beneficial patient outcomes, as they support easy administration and therapy adherence. Before the medication reaches the patients, the devices must be reliably assembled, labeled and packed. This is where the Syntegon solutions come into play: our systems cover the safe assembly, labeling, handling, and secondary packaging of medical devices. Thanks to their modular platform design, our manual, semi and fully automated systems allow for a high level of customization, helping you meet market requirements, while always having patient safety in mind.

Have a look at our portfolio of reliable assembly and labeling solutions for different MedTech devices. Agile and quick format changeovers and precise labeling are just a glimpse of the possibilities.

This RMA machine is designed for small batches and clinical trials with auto-injectors, pens and other medical devices. It features a workstation for manual loading and unloading of components and devices; all other processes are performed automatically. This way, the range manual assembly machines achieve an output of between one and three devices per minute.

Our range auto-injector assembly and labeling machines achieve outputs of up to 200 parts per minute and can be flexibly automated according to your specific production requirements. We offer a comprehensive portfolio of rotary or linear platforms that supports rapid format changeovers for increased production flexibility.

Contractors and service providers of auto-injectors need the highest flexibility to meet growing market demands. Check out our Range Device Assembly (RDA) machines: they can assemble and label all known auto-injector types, including yours!

The range pen assembly systems and matching labeling machines from Syntegon are designed for outputs of up to 300 parts per minute. Just like our auto-injector assembly systems, they can be flexibly automated according to your specific production requirements. We offer a comprehensive portfolio of rotary or linear platforms that support low to high output production, as well as rapid format changeovers for increased production flexibility.

The Syntegon tray loader is a high-speed system for fast and reliable loading and unloading of primary containers. This compact and GMP-compliant machine adds to our extensive portfolio of handling equipment and can either be integrated into a new line or retrofitted to an existing installation. The conveyor transport system allows 100 % traceability of containers from the upstream machines to the tray loading station. Rejects from the upstream machines can thus be discharged on the tray loader. Additionally, automatic systems for in-line inspection and marking such as vision control and lasers can be integrated. A separate station for in-process control (IPC) sampling of containers for offline checking is available as an option.

Syntegon offers customized solutions for the direct labeling of medical devices such as pens, auto-injectors, catheters, inhalers or other MedTech products in primary and secondary packaging. Depending on your specific requirements, we will design the suitable labeling solution in terms of output, label orientation and dispensing accuracy, as well as special functions like online printing, code verification, or false label rejection. A variety of different handling and transport systems are available depending on the shape and characteristics of the devices or packages, and your output requirements.

Syntegon offers customized case packing solutions for the secondary packaging of medical devices such as pens, pen needles, auto-injectors, catheters, inhalers, infusion sets, or cannulas. Depending on your specific requirements, we will design the suitable concept in terms of loading pattern, requested output and case dimensions. We offer different handling systems for the feeding and arranging of medical devices in their packages, from simple stacking units to multi-axis industrial robots. If you are looking for standardized machine platforms in the up- or downstream packaging process, we can integrate modules from Syntegon or external partners into a line solution.

This machine is designed for small batches and clinical trials with auto-injectors, safety devices, pens, and other standard devices. It features a workstation for manual loading and unloading of components and devices; all other processes are performed automatically. This way, the range manual assembly machines achieve an output of between one and five devices per minute.

The semi-automatic machine comes with a manual infeed, while all assembly processes are automated. An upgrade to an automatic infeed is possible at any time. With an output of up to 50 devices per minute, the machines of this range have a big selection of add-on modules.

Our fully automated device assembly machines can assemble up to 200 devices per minute. The fully automatic infeed and outfeed is fully integratable with upstream and downstream equipment. Moreover, we offer you a large selection of add-on modules like labelling, tracing etc.

Our labeling solutions span from manual loads to 500 automatic labels per minute. All labeling systems are fully servo-driven and have an integrated HMI with full control of all parameters. To maintain high outputs, the platform features label reject before application, and automatic reel exchange. Moreover, you receive integrated vision verification and a selection of printing technologies.

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