With the progress and development of the society, polymer materials represented by PVC and TPU have become the most commonly used biomedical materials, and the application of polymer materials in in vitro diagnostic equipment is becoming more and more important.

Due to its mechanical stability, biocompatibility and elasticity, TPU is often used to prepare medical catheters, such as infusion tubes and artificial catheters. Fiberoptic gastroscope is an important part of the gastroscope hose has high performance requirements, sufficient flexibility and flexibility without toxic side effects, the diameter of the catheter is the same, no bending and deformation. The surface of the conduit needs to be smooth. The gastroscope tube made by TPU meets the above requirements and medical requirements.

TPU endotracheal intubation is light and flexible, convenient for clinical use, easy and comfortable for patients to move, can prevent radiation damage to the human body, is conducive to treatment and diagnosis, can replace metal endotracheal intubation, is one of the world's more advanced medical devices.

Traditional PE, PVC film has the advantages of water - proof, liquid - proof. They are popular for medical protection, such as wound dressings and surgery, but they have a problem with not being able to get rid of the sweat produced by the body's metabolism in a timely manner, causing discomfort such as heat, cold and humidity. Therefore, there is an urgent need for a new medical film to replace this kind of products. Polyurethane elastomer medical films were made by spraying pressure sensitive adhesive on the surface of polyurethane elastomer films. Compared with traditional PE and PVC medical film, TPU medical film has the characteristics of gentleness, good skin compatibility, high elasticity, strong moisture permeability and 100% waterproof, which can effectively prevent the film from falling off during operation. Inhibit the transfer of various bacteria during the operation. Such as orthopedic surgery, heart valve replacement, intravenous indwelling needle, abdominal and thoracic intubation, treatment of spinal fluid shunt, etc., can significantly reduce the infection rate. There is also a waterproof antibacterial medical polyurethane elastomer, made of medical protective gloves with good mechanical properties, water resistance and air permeability, can resist the invasion of gram-positive and negative bacteria.

At present, TPU has made some achievements in the medical field in China, such as the successful development of shape memory polyurethane elastomer, thermoplastic polyurethane film composite textile with body temperature shape memory polyurethane elastomer and thermoplastic polyurethane film can be used in the production of allergy-proof gloves and band-aids. Amphoteric biodegradable medical polyurethane elastomers were prepared under mild reaction conditions.

In addition, good results have been obtained in prosthesis, cartilage, separation membrane, medical suture, family planning products and so on.

To sum up, TPU materials have good biocompatibility, anti-thrombotic performance, large degree of freedom of design, good mechanical strength, easy processing and molding, good adhesion, friction resistance and bending resistance, and are widely used in medical materials, which will be the focus of future research.

This article simply introduces the elasticity of polyurethane elastomer material several applications in the medical field, such as artificial heart assist device, medical catheter, medical film, medical artificial leather and so on our country have also developed a biodegradable PU slow-releasing material, tissue engineering material and human body repair material research, the future TPU still has more applications will be used in the medical field.