Venous blood collection is to collect blood samples for testing and analysis by inserting a thin tube into the human vein with a needle. Veins are a type of blood vessel in the human body with weak or even no pulse. They are usually located deep in the subcutaneous tissue and muscles, with thick walls, and are less affected by factors such as autonomic nerves and changes in body position, so they are suitable for blood collection. When collecting blood, medical staff will perform multiple steps such as disinfection, puncture, and fixation to ensure the safety and accuracy of blood collection. Venous blood collection is a common medical operation and is widely used in clinical medicine and scientific research.

In terms of appearance, protective clothing is easy to distinguish from isolation clothing and surgical gowns. Surgical gowns and isolation gowns are not easy to distinguish. They can be distinguished by the length of the belt (the belt of the isolation gown should be tied to the front for easy removal. The belt of the surgical gown is tied at the back). From the functional point of view, there are overlaps between the three. The requirements for disposable surgical gowns and protective gowns are significantly higher than those for disposable isolation gowns. In the case of common use of isolation gowns in clinical practice (such as contact isolation of multi-drug resistant bacteria), disposable surgical gowns and isolation gowns can be interchangeable, but where disposable surgical gowns must be used, they cannot be replaced by isolation gowns.

Disposable sterile surgical gowns are protective clothing provided by hospitals, clinics and other medical institutions. They are usually used to protect medical staff during surgical operations and other related high-risk operations. It is a disposable item and has been strictly sterilized to prevent the spread of pathogens and cross-infection. Its material is usually made of high-density non-woven material, which is soft, skin-friendly, and breathable to reduce fatigue and discomfort of surgical personnel. The collar, cuffs, trouser legs and other parts of the surgical gown are specially treated to prevent them from shifting, wrinkling or loosening, ensuring the sterility of the surgical site. The use of disposable sterile surgical gowns is simple, convenient and quick. It does not need to be cleaned and disinfected after use, which avoids some pollutants from adhering to the surgical gowns and entering the air to cause the spread of bacteria and viruses and the accumulation of dust,

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.