A syringe consists of a syringe with a small hole at the front end and a matching piston core rod. The syringe is used to inject a small amount of liquid or gas into or extract from areas that are inaccessible by other methods. When the core rod is pulled out, the liquid or gas is sucked from the small hole at the front end of the syringe, and when the core rod is pushed in, the liquid or gas is squeezed out. The process of extracting or injecting gas or liquid with a syringe and a needle is called injection.

Sutures are special threads used for ligation and hemostasis, suture and tissue suturing during surgical operations or trauma treatment. When used for tissue suturing, they can ensure wound closure, support healing and reduce the chance of infection. They are divided into absorbable and non-absorbable threads.

Disposable bacterial filter is a consumable used with ventilator, anesthesia machine and artificial respirator. It is mainly used to filter bacteria, particles and increase the humidity and heat of gas (warm and moisturizing) in the pipeline of ventilator and anesthesia machine. It is also used with pulmonary function test equipment.

Traditional skin repair surgery often requires a long recovery time, and is prone to postoperative scars and deformation. The use of skin traction devices can effectively reduce the damage to the patient's skin tissue during surgery, reduce surgical risks, shorten recovery time, and reduce the occurrence of complications. Skin traction devices can be used to stretch and fix skin tissue during surgery. It is usually made of sterile elastic material, which can effectively stretch the skin and keep it in a specific position.

Varicose veins of the great saphenous vein are the longest superficial subcutaneous veins in the body. They start from the dorsal vein of the foot on the inner side of the dorsum of the foot, ascend on the inner side of the lower limbs, and reach the groin. Varicose veins of the lower limbs mostly occur on the inner side of the calf. In severe cases, they can extend upward to the inner side of the thigh, and even the whole lower limbs can see varicose veins in a tortuous mass. Varicose veins of the lower limbs of these patients mainly occur in the great saphenous vein and its branches, so it is called great saphenous varicose veins.