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Expanded polytetrafluoroethylene Due to non-toxic, non-allergenic, non-carcinogenic and other side effects can be widely applied to medical equipment, instruments and tissue filling materials. EPTFE has a special microporous structure of human tissue cells, vascular tissue can grow and connect, after connection close to the organization autologous tissue, this tissue growth healing in their micropores formed, from a medical point of view See more superior than the traditional way of healing silicone rubber fibers wrapped in tissue. With the development of technology, expanded polytetrafluoroethylene has become medically important filler is biological tissue substitutes one of the most ideal material.
In rhinoplasty application, for example, the first based on the specific characteristics of the nose, the expanded polytetrafluoroethylene carved into the desired shape, place it in the corresponding parts of the nose nose prosthetic scaffold construct, thereby improving nasal form, practice indicated shaping good effect. Especially in the most critical of the dorsum of the nose and nasal tip, and human tissue implanted in blending excellent elongated structure expanded polytetrafluoroethylene, the body's own tissue ingrowth elongated body microporous expanded polytetrafluoroethylene inside, move, ulceration or rejection of materials and other adverse reactions do not occur, but can also prevent the reflection of light, the facial shape after shaping more natural and lifelike. Solid silicone rubber base with expanded polytetrafluoroethylene matrix composite nose prosthesis, there is a certain hardness to facilitate cutting and implants, but also the production of preformed to a particular shape, to make it more in line with demand clinic. The present invention, since the price is reasonable, in line with the affordability of the general population, more acceptable. In the application of the heart valve surgery, the researchers first sheet ultramicropore expanded polytetrafluoroethylene material made of synthetic sewing heart valve stent in a particular elasticity, the test results showed that: expanded polytetrafluoroethylene ethylene synthesis loop artificial mitral valve in the cycle in both the fully open and closed, each expanded polytetrafluoroethylene artificial mitral valve chordae are in tension, between the size of the flap valve to close tight, no visible slits, thereby indicating expanded polytetrafluoroethylene artificial mitral valve has good in vitro hydrodynamic characteristics and durability.
Expanded polytetrafluoroethylene in other parts of the body in medical applications also achieved considerable success.Varicose veins is a common human surgical disease, according to statistics in venous disease, primary deep venous insufficiency accounted for 55.3%, in the past due to lack of understanding of the cause, using the traditional great saphenous vein high ligation pumping stripping surgery and other treatment, the recurrence rate is very high, with the promotion of expanded polytetrafluoroethylene in humans in medical applications, the researchers used artificial blood vessels expanded polytetrafluoroethylene sheet, row superficial femoral vein ring Venoconstriction primary deep venous insufficiency achieved very satisfactory results. Using ePTFE synthetic materials also eliminate residual cavity after pneumonectomy as packing material. Expanded polytetrafluoroethylene patch in elderly inguinal hernia surgery into safe and effective, lower relapse rate, fewer complications, and expanded polytetrafluoroethylene patch than traditional polypropylene mesh more comfortable. Eleven out using heparin alginate gel modified with expanded polytetrafluoroethylene as well as good blood compatibility and tissue compatibility, can be applied to small-diameter artificial blood vessels and so on. With expanded polytetrafluoroethylene material as a wound dressing, no adverse reactions placed on the damaged wounds, minor inflammation and foreign body reaction caused, the same can be used as wound dressing materials. |