Background and Objectives
This study aims to improve the inconvenience of injecting a conventional syringe. We propose a pen-type injection-assisting device that can automatically apply pressure to a replaceable cylinder using an electric motor. Generally, injection with a syringe is one of the most important techniques in clinical practice and is particularly used when lipolysis or anesthetic agents are injected. Currently, a general syringe is used for lipolysis injection, and a large amount of drugs are injected, resulting in significant fatigue of the fingers of medical personnel. In addition, it is difficult to inject with a syringe while maintaining a constant pressure due to fatigue.
Materials and Methods
The assisting device is demonstrated as a model for a 3D automatic syringe assist device. The main body is a plastic syringe detacher, and all internal accessories were made of plastic, except for the holder and motor which are in the form of a metal clip.
Results
The present invention is a device that uses an electric motor and a cogwheel connected thereto to apply positive pressure to a cylinder while holding the syringe with one hand, like a pen, and pressing a presser bar with the push of a button.
Conclusion
By improving discomfort during the injection process due to manipulation of both hands, side effects, such as pain and hematoma that patients may experience after surgery can be alleviated.

Supplementary video file: This article contains supplementary material (It is available at https://youtu.be/PhN4o72LxeQ).

Keywords: Innovative device, Injection, Syringe, Lipolytic agent, Subcutaneous fatty tissue