File:Treatment of knee with Oudin coil.jpg
Treatment_of_knee_with_Oudin_coil.jpg (450 × 534 pixels, file size: 151 KB, MIME type: image/jpeg)
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DescriptionTreatment of knee with Oudin coil.jpg |
English: Effluvation treatment of knee around 1920 using an Oudin coil, a transformer invented in 1893 by French physician Paul Marie Oudin, similar to a Tesla coil which produced very high voltage radio frequency electricity. This was used to treat many diseases in the Victorian era medical field of electrotherapy. Here a multipointed electrode attached to the coil (left) produces a luminous brush discharge (effluve). This is held by the doctor and played over the patient's knee. The patient holds a metal pipe electrode which is attached to the top of the coil to serve as the return path for the current. The Oudin coil produced a potential of 200,000 to a million volts. This was not painful for the patient since the frequency of the current was so high; around 100 kHz to 2 MHz. Alternating current with frequencies above around 10 kHz do not cause the sensation of electric shock when applied to the body. High frequency electrotherapy caused a heating of tissues, and evolved into the modern field of diathermy |
Date | |
Source | Retrieved September 6, 2015 from Sinclair Tousey (1921) Medical Electricity, Rontgen Rays, and Radium, 3rd Ed., W. B. Saunders Co., Philadelphia, p. 550, fig. 344 on Google Books |
Author | Sinclair Tousey. There is a signature in the righthand corner (P. Calas?) |
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Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:05, 3 May 2021 | 450 × 534 (151 KB) | Materialscientist (talk | contribs) | FFTT | |
00:14, 7 September 2015 | 450 × 534 (85 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | GIMP 2.4.7 |
File change date and time | 12:05, 3 May 2021 |
Color space | Uncalibrated |
Image width | 450 px |
Image height | 534 px |
Date and time of digitizing | 04:38, 5 December 2004 |
Date metadata was last modified | 04:38, 5 December 2004 |