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2012年1月13日星期五
The Myths and Realities of Magnotherapy
When a product becomes successful it generally follows that other similar products want to share that success. There is nothing wrong with that, providing the similar product is as good as or better than the original successful product. Unfortunately, this is not always the case with magnotherapy products. Following the publication of the clinical trial of Nigel Broderick's previous, now outdated product Bioflow in the British Medical Journal many cheap magnetic products claiming similar benefits (and even quoting the report!) suddenly appeared from nowhere, but most were (and still are) making claims beyond the products capabilities.
Products such as magnetic earrings, magnetic insoles, magnetic belts, magnetic knee supports and many others claim magical properties, but none of these are supported by meaningful evidence.
Magnet strength
Don't be fooled by advertisements stating the strength of a magnet. Nigel emphasises that the effectiveness of a magnotherapy product is a combination of the magnetic field pattern and strength of the magnet. The strength of magnets given by many suppliers are equally as meaningless as they are impressive! A figure of several thousand gauss without stating the mass of the magnet, composition of the magnet, or distance from the magnet at which the reading is taken provides no indication of the effectiveness of the magnet. Because of so many variables nigel suggests that the simplest way to check if the strength of a magnet in any magnotherapy product is sufficient to produce a biophysical change is to offer a steel weight of at least 0.3 kg to the surface of the product (our rl and pu models support 0.5kg!). If the weight can be suspended from the product and not dropped the magnet has sufficient strength - but mind your toes if you try this!
Magnetic pattern
Just as important as the strength of the magnet is the pattern of the magnetic field. A magnet has two poles and most magnotherapy products have only one of these poles active against the body tissue. A minority may have two, but these alone will not produce the desired pulsing effect.
North poles and south poles
Don't believe any talk of a north pole being good for one condition and a south pole being good for another. If nature had intended this to be true we would always have to walk in one direction and never be able to turn around safely in the earth's magnetic field!
People with certain conditions should not wear magnets
There is no evidence to support this. Remember, a magnetic field is a natural force - in fact all life on earth lives in a giant magnetic field. However, if a prospective user is in any doubt they should consult their doctor.
People with heart pacemakers should not wear magnets
True. A strong magnet worn on the wrist could affect the operation of a pacemaker if passed close to it. Medical advice should be taken by anyone fitted with a man made surgical device or implant.
Testimonials - beware of testimonials!
Some magnotherapy suppliers use 'customer' testimonials in their advertising, which may or may not be true. The advertising standards authority does not believe them so why should you? The only meaningful customer testimonial is the one that is relevant to you - and that is the one you write yourself!
Typical testimonial
"Your product is great - I would recommend it to anyone"
2012年1月5日星期四
William Bovie – the Inventor of Modern Electrosurgery
William Bovie is credited by the world as the developer of the first commercial electrosurgical tool. He believed that the cautery effect, which is the way by which you destroy dead or dying or tissue that is not normal by applying great hot or cold to it, might be possible by the use of electric current of very high frequency.
In reality, the first Bovie knife and the surgeries in which it was used were made better and changed over the years. The sale of his electrosurgery devices did not make much money for years. There was not enough demand for it and the design was continually changed and made better. In fact, the surgeon probably never really profited from his invention.
Bovie would be pleased most likely if he knew that the Bovie knife, or devices based upon it, are now one of the most important tools used in delicate surgeries of all types today. Some of these surgeries are so intricate, that the human hand is not steady enough to perform them. An electrosurgical tool has to be fitted onto a machine, which is then controlled by a surgeon by remote.
Today the Bovie knife is used in all sorts of electrosurgery. How it works is that a high frequency current is applied to tissue. It normally is at hundreds of thousands of oscillations per second.
There is a fast elevation of temperature where the electrode comes in contact with tissue. It transfers heat into the human tissue. It destroys the tissue that it touches directly, and cuts and seals tissues which are adjacent. Sometimes this surgery is called thermocautery or electrocautery.
The most common uses of the Bovie knife in electrosurgery are in surgeries on the eye and on the brain. Sometimes this tool is used to take off skin tumors, and for fine dental surgery.
If you are looking for a really good quality product, we highly recommend the products that you can find at the Medical Device Depot Website. You can find a great many chairs there at a very competitive price. We have been in this business for many years, and we are confident that we can find a product that will fit your needs and budget to perfection.
We have served literally thousands of satisfied customers throughout the United States and in dozens of countries world wide. Our customer service department also is always available to assist you in the small chance that there is any problem with your order.
2012年1月4日星期三
Who're the actual Creators associated with Contacts
The idea of connections might day time in order to Leonardo Da Vinci. Inside the 16th century, Leonardo Da Vinci known how related to submerging the interest in the meal related to h2o, nevertheless she or he did not suggest their own idea provide regarding repairing vision. Greater than a hundred years afterwards, Rene Descartes produced the idea of the actual mug tube filled with liquid that may correct noticeable issues, nevertheless it absolutely was not really useful. Jones Vibrant produced Descartes' idea 170 several years afterwards in addition to produced precisely what might be thought to be the particular precursor for the get in touch with. Nonetheless, it may be inside 1887 how the In german glassblower produced an authentic sensation related to get in touch with which may be noticed by way of in addition to tolerated. Inside 1888, the particular In german physiologist Adolf Eugen Fick produced mug get in touch with and could become placed on for many hrs at any time. After this, people acknowledged the worth related to connections, along with the globe requested regarding improved designs.
Inside the 1900s a great Usa optometrist released the particular plastic-type "corneal" get in touch with in addition to produced an even more helpful get in touch with. This specific created a great the main real improvement related to get in touch with. People did not withstand soreness via mug cable connections presently there following. The particular make contact with company in addition to systems started to be a growing number of old. With the 60s Otto Wichterle in addition to Drahoslav Lim created the actual mild get in touch with from the h2o consuming plastic-type. These kinds of connections have been rapidly employed more frequently when compared with organization connections, mainly due to the immediate ease and comfort related to mild connections. This specific enhancement is often a main breakthrough in addition to produces almost all mild cable connections nowadays. Inside the 1970s this specific contact lens have been available to victims in the united states in addition to connections provided to be able to victims together with astigmatism have been furthermore accessible.
The particular 1980s is surely an important landmark for the improvements related to connections. Completely new options are usually a growing number of. Everybody can placed on mild colored cable connections along with extented placed on connections. Furthermore, RGP connections have been produced; bifocal connections may be found to the industry. In addition to fortunately adequate, for all those contact lens customers, the particular require related to multi-purpose contact lens remedy solution have been pleased. The particular systems related to connections started to be old steadily in addition to inside the 1990s there has been a lot more enhancements in addition to contact lens customers may choose one which suits her or him finest via several options.
The bottom line is, there is not only one originator in the get in touch with, but rather co-operation among many individuals a lot more than several centuries. Subsequent centuries related to check via people designers, the present connections are usually excellent with regards to systems in addition to top quality.