A syringe is a medical device composed of a barrel with a small hole at the front and a plunger rod. It enables precise control over the aspiration and discharge of liquids or gases. Syringes are widely used in medical treatment, laboratories and scientific research for drug injection, sample collection and other functions.

Syringes can be classified according to usage, structure and function, material and volume.

(1) Disposable Syringes

Designed for single use and then discarded, disposable syringes help reduce the risk of cross-infection. They are usually made of plastic, lightweight and easy to operate. Disposable sterile syringes are the most common type, widely applied in hospitals and clinics.

(2) Reusable Syringes

These syringes are intended for multiple uses, but require strict cleaning and disinfection before and after each use. They are often made of durable materials such as metal or glass, suitable for personal self-injection or repeated use in specific medical environments.

(1) Conventional Syringes

Consisting of a barrel, plunger, needle and other parts, conventional syringes are the most commonly used type. They are suitable for liquid drug injection, blood collection and other operations.

(2) Safety Syringes

Safety syringes are equipped with anti-needlestick designs. Through mechanical structures, the needle automatically retracts or locks after use, reducing risks for medical staff and patients.

(3) Needle-Free Syringes

Based on the principle of pressure jet, needle-free syringes use high pressure to push medicine through the skin in an extremely fine stream. They reduce injection pain and lower the risk of infection.

(4) Combination Syringes

These devices integrate multiple syringes together, allowing simultaneous injection of multiple medicines or liquids.

(5) Special-Purpose Syringes

Designed for specific needs, such as insulin syringes and syringes for infusion pumps. They usually have special functions and structures to meet particular medical requirements.

(1) Plastic Syringes

Most disposable sterile syringes are made of plastic, which is lightweight and low-cost.

(2) Glass Syringes

A traditional material with high durability and chemical stability, but relatively heavy and fragile.

(3) Metal Syringes

Some reusable syringes are made of metal such as stainless steel, with high durability and corrosion resistance.

Common syringe specifications include 1ml, 2ml, 5ml, 10ml, 20ml, 50ml, etc.

The main medical applications of syringes include drug injection, blood collection and other clinical procedures.