The regular No. 10 and No. 20-24 blades are used to cut skin, subcutaneous, muscle, periosteum and other tissues; the No. 11 blade is used to cut blood vessels, nerves, gastrointestinal and cardiac tissues; the No. 12 blade is used for knee and pancreatic surgery; and the No. 15 blade is used to cut deep tissues and tissues for ophthalmology and coronary artery bypass grafting, among other tissues.

Hold the end of the blade side of the handle in your left hand, hold the needle holder (needle holder) in your right hand, clamp the upper section of the blade hole at a 45° angle to the dorsal side of the blade hole, hold the handle in your left hand, and exert downward force against the hole slot until the blade is completely installed in the handle; when removing, hold the scalpel handle in your left hand, hold the needle holder in your right hand, clamp the dorsal side of the tail end of the blade hole, lift it up a little bit, and push it forward along the blade handle slot.

Precautions for use
1, each use of the surgical blade needs to be sterilized, you can use high-pressure steam sterilization method, boiling disinfection method, immersion disinfection method in any one of the methods, boiling disinfection is very obvious, but it is recommended to use disposable medical surgical blades.
2, regardless of which method of holding the knife, should be the blade protruding surface and tissue in a perpendicular direction, layer by layer to cut the tissue, do not use the tip of the knife to operate with force, the knife is too high to control the unstable, too low and impede the line of sight, to be moderate.
3, the doctor with a scalpel for a long time to carry out surgery, often have wrist parts of the soreness and other discomfort, resulting in wrist strain phenomenon, therefore, may adversely affect the surgical effect, but also to the doctor's wrist to bring health risks.
4, in the muscle and other tissues for cutting often accidentally injured blood vessels, encountered in this case need to be flushed with water in order to find the location of the bleeding as soon as possible, otherwise it will cause serious difficulties in the normal conduct of the operation.