Release date: 2007-07-25
New developments in nanomedicine devices in the United States are getting better. Nanomaterials have many properties that are not found in conventional materials. Nanomaterials have been widely used in many industrial fields to date. Medical devices are no exception. The so-called "nanomedical devices" refer to medical devices assembled from components processed with nanomaterials; or medical devices, surgical instruments, etc. coated with nanomaterials. According to a recent report by the US Nano Biotechnology News Weekly, at least 60 new drug preparations and 90 new medical devices, diagnostic reagents and other new products have been used in the United States. With more and more orthopedic materials, cardiovascular implants (such as vascular stents, etc.), surgical instruments and other improved products coated with new nanomaterials, experts predict that the US nano medical device market sales The amount will increase from $400 million in 2006 to $5.2 billion in 2011.
â– Pocket Disease Diagnostics This is a pocket disease diagnostic device that can be placed in a pocket. The key component is a piece of disposable silicon chip. According to reports, the chip shows a microporous membrane made of a thin layer of nanomaterial, which can simulate the filtration system of human cells. As long as the user squeezes a drop of blood onto the chip, the handheld disease diagnostics can quickly determine if there is a certain range of diseases. The instrument can correctly interpret a variety of diseases such as hepatitis B, AIDS, diabetes and even certain tumors based on blood samples. Even those who do not understand the professional laboratory knowledge can squeeze out a drop of blood according to the instrument operating instructions to know if they have certain diseases.
■Nano-scale micro-motors According to the latest foreign reports, Professor Wang Zonglin, a Chinese-American scientist in the Department of Materials Science at the Georgia Institute of Technology, and his assistant have developed a miniature nano-motor. The magic is that it can be used from the surrounding environment. Draw energy and convert it into electricity. According to Professor Wang, the nano-motor is made by first growing "a gallium arsenide, ruby ​​semiconductor part at a distance of half a nanometer" on a layer of soft polymer substrate, and then showing it in growth. Zinc oxide to collect current. This semiconductor micro-motor uses the piezoelectric effect to produce an average current of 4 watts per square centimeter in a living organism. Nanomotors can be installed as power sources in implantable medical devices and implantable drug pumps such as pacemakers and ventricular defibrillators. In theory it can be used indefinitely (unless the parts are aging).
â– Nanowire Light Sources The Lawrence Berkeley National Laboratory, part of the US Department of Energy, recently developed a "bio-friendly nanoscale light source" that emits visible light. Such nanoscale sources have many uses, one of which is for "single cell endoscopy" and "secondary wave bioimaging technology" and the like. Nano-scale light sources are expected to have broad application prospects in future medical device new products.
â– New medical fiber coated with nano materials
Researchers at Ohio State University have developed a new nanomaterial that can be used for surface treatment of common medical fiber fabrics. Medical fiber fabrics treated with such nanomaterials have waterproof and oil-repellent properties and, more importantly, have "self-cleaning" capabilities, thereby preventing microbial contamination and preventing cross-infectious diseases common in hospitals. The nano medical fiber fabric can be processed into various medical textiles such as surgical towels, doctor/nurse work clothes, work caps, patient clothes, bed sheets and the like.
â– New nano-coatings with antibacterial effect According to a recent report by the Centers for Disease Control (CDC), in the past few years, 2 million patients in the country have been infected with bacteria during hospital treatment, resulting in treatment costs of up to 4.8 billion US dollars. It is understood that a large part of hospital infections are caused by microorganisms remaining on surgical instruments that are not thoroughly disinfected.
The US I-FLOW Biomaterials Co., Ltd. recently launched a "Nano Silver" series of sterile catheters containing the company's patented technology. The principle is to apply a thin layer of nano-scale ion silver on the surface of a common polypropylene medical catheter. Silver is known to be a good natural antibacterial material. The successful development of nano-silver new coatings will “put on†a thin layer of coats with effective antibacterial effects for various medical devices, thereby greatly reducing the risk of patients being cross-infected during hospital treatment and saving treatment costs. It is reported that the US FDA officially approved the company's new nano-silver sterile catheter products for clinical use in May this year.
â– Remote "nanomachinery"
Researchers at the University of California, Berkeley invented one of the world's smallest remotely operable nanomachines. According to reports, it is to stick a molecule of the organic compound "azobenzene" on the gold powder, as long as it is irradiated on the azobenzene molecule with an ultraviolet laser to force them to change their original shape. University of California researchers envisioned that their remotely-operable nanomachines could be used in switches, pistons or other moving parts in the future to develop ultra-small medical devices that can be operated remotely.
Other new nanoscale medical device products in clinical research include: a retinal implantable nanomaterial that restores vision to many blind people who are blind due to "retinitis" eye disease. The blind person can see the external image by wearing a pair of special glasses (the camera has a miniature camera). The working principle is that the miniature camera will take the external image into the retina and implant it into the nano material and convert it into a bio-current signal, which will be transmitted into the visual center of the brain and form an image, so that the blind can see the real external image. . This complex blind visual recovery medical device is still being tested. Another new nanomedical device under test is “Nano-coated dental materialâ€, which has strong antibacterial activity, prevents oral microbes from adhering to gums and teeth, and has self-cleaning ability.
Medical devices made of new nanomaterials will change the old appearance of existing medical device products and will become a new bright spot in the 21st century medical device market. ——Shanghai Medical Device Industry Association
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