With the progress and development of modern science and technology, silica gel has been widely used in medicine. Silica gel has good biocompatibility, no irritation, non toxicity, no allergic reaction and very few rejection reaction to human tissue; It is a kind of material that is not stable in contact with the original body fluid and has good physical and chemical properties.

Silica gel tube

Silicon, the basic component of silica gel material, is a common and easily available element on earth. Liquid silicone rubber is easy to make into complex shapes and chemically inert. Its practicability and excellent characteristics make it very suitable for medical equipment from the beginning.

For medical use, silica gel must be tested for biocompatibility and comply with the regulations of the U.S. Food and drug administration. The application of medical silica gel can be divided into two categories: time limit and not affected by time limit. Generally, the limited ones are used for short-term transplantation and the unrestricted ones are used for long-term transplantation.

Silica gel composition:

Silicone rubber is one of synthetic rubber, with chemical name of polymethylvinyl siloxane. It is polymerized by dimethylsiloxane monomer and other silicone monomers under the action of acid or alkaline catalyst, and the relative molecular weight is generally 400000 ~ 500000.

characteristic:

1. Solid medical silicone rubber can replace bone or cartilage as tissue filling or scaffold material, so it can be made into artificial joints and tendons to repair the defects of limb joints and tendons. Plastic materials are often used as materials to repair deformities and defects in the face, ears, nose and so on.

2. Foam medical silicone rubber can be used to replace human adipose tissue and repair defects of human facial subcutaneous tissue, such as hemifacial atrophy.

3. Thin film medical silicone rubber can be used as a substitute for tendon sheath; The external intestinal fistula internal plugging piece is also made of this type of silica gel. Its function is to close the intestinal fistula in the intestinal cavity, prevent intestinal fluid leakage, maintain intestinal patency, restore intestinal nutrition, reduce complications and simplify the treatment of intestinal fistula.

4. Liquid medical silicone rubber, also known as silicone oil, is a transparent liquid with low viscosity. Silicone oil is injected into the depressed and deformed parts of craniofacial region with a coarse injection needle. It is easy to use and can be shaped without hospitalization and can be treated in outpatient department. In addition, the hydrocephalus drainage device is made of medical silicone rubber to treat hydrocephalus. A spherical artificial heart valve was made to replace the damaged mitral valve membrane. As for the silicone contraceptive ring, it has the advantages of safety, convenience, reliability and long-term effect. Silicone venous catheter, gastric tube and urinary catheter have the advantages of light damage and little stimulation. They can be inserted into relevant parts of the human body for a long time, and have been widely used in clinic