PubMed · 10144710
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L Scott. 1995-08-14. A new product solves old problems.. https://pubmed.ncbi.nlm.nih.gov/10144710/
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BACKGROUND: Electromagnetic therapy is used with the aim of improving the healing of chronic wounds such as pressure sores and venous leg ulcers OBJECTIVES: To assess the effectiveness of electromagnetic therapy in the treatment of pressure sores SEARCH STRATEGY: The Cochrane Wounds Group search strategy was used (see Scope) to search for randomised controlled trials (RCTs) of electromagnetic therapy for the treatment of pressure sores SELECTION CRITERIA: Randomised controlled trials comparing electromagnetic therapy with sham electromagnetic therapy, or other (standard) treatment DATA COLLECTION AND ANALYSIS: Results of searches were scrutinised by one reviewer (and checked by a second) to identify possible RCTs and full reports of these were obtained. Details of eligible studies were extracted and summarised using a data extraction sheet. Attempts were made to obtain missing data by contacting authors. Data extraction was checked by a second reviewer. MAIN RESULTS: A total of two eligible RCTs were identified for inclusion in this review. The first of these studies (Comorosan 1993) was a three armed study comparing electromagnetic therapy, electromagnetic therapy in combination with standard therapy, and standard therapy alone. The second study (Salzburg 1995) was a comparison between electromagnetic therapy and sham therapy on 30 male patients with a spinal cord injury and a grade two or grade three pressure sore. Neither study found a statistically significant difference between the healing rates of electromagnetic therapy treated and control group patients. REVIEWER'S CONCLUSIONS: The results suggest no evidence of a benefit in using electromagnetic therapy to treat pressure sores. However the possibility of a beneficial or harmful effect cannot be ruled out due to the fact there were only two trials with methodological limitations and small numbers of patients.
BACKGROUND: Electromagnetic therapy is used with the aim of improving the healing of chronic wounds such as pressure sores and venous leg ulcers OBJECTIVES: To assess the effectiveness of electromagnetic therapy in the treatment of venous leg ulcers SEARCH STRATEGY: The Cochrane Wounds group search strategy was used (see Scope) to search for randomised controlled trials (RCTs) of electromagnetic therapy for the treatment of venous leg ulcers SELECTION CRITERIA: Randomised controlled trials comparing electromagnetic therapy with sham electromagnetic therapy or other (standard) treatment DATA COLLECTION AND ANALYSIS: Results of searches were scrutinised by one reviewer (and checked by a second) to identify possible RCTs and full reports of these were obtained. Details of eligible studies were extracted and summarised using a data extraction sheet. Attempts were made to obtain missing data by contacting authors. Data extraction was checked by a second reviewer. MAIN RESULTS: A total of three eligible RCTs were identified. Two trials compared the use of electromagnetic therapy to sham (Ieran 1990; Kenkre 1996) and one trial (Stiller 1992) compared it with standard topical treatments. One of the trials found a difference in healing rates of borderline statistical significance between electromagnetic therapy and sham, although the direction of treatment effect was consistently in favour of electromagnetic therapy the difference was not statistically significant. REVIEWER'S CONCLUSIONS: There is currently no reliable evidence of benefit of electromagnetic therapy in the healing of venous leg ulcers.
Since the development of the first scanning near-field optical microscope, great effort has been put into the development of near-field optical probe tips with a good lateral resolution of the order of several tens of nanometres and a high power throughput. Several groups have proposed the use of scanning near-field optical tips with a coaxial structure. From electromagnetic theory, it is known that such structures have no cut-off frequency and a power transmission close to unity. In this paper we discuss some topics concerning the stimulation of optical coaxial waves and their propagation behaviour.