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At least 865 records · Page 48Linked to original sources
PubMed1981

Private land mobile radio services; bio-medical telemetry operations--Federal Communications Commission. Final rule.

This action changes rules in the Special Emergency Radio Service to permit the limited use of bio-medical telemetry systems on certain medical services VHF frequencies. The operation is to be allowed only beyond fifty miles from the center of urbanized areas of 600,000 or more population (U.S. Census of 1970). The bio-medical telemetry system is used to send electrocardiograms from patients to hospitals.

Electrocardiography↗
PubMed1982

Cooperative use and multiple licensing of stations in the private land mobile radio services--Federal Communications Commission. Final rule; report and order.

The Federal Communications Commission is adopting rules to govern the cooperative sharing and multiple licensing of facilities in its private land mobile radio services. The rules which are adopted define the types of arrangements which will and will not be allowed. These rules have been adopted: (1) To remove certain procedural burdens heretofore required ot licensees and user eligibles; (2) To assure adequate licensee control; and (3) To codify permissible licensee and user practices relating to multiple licensed and cooperatively shared systems.

Radio↗
PubMed1982

Regulatory policies and procedures for the Domestic Public Land Mobile Radio Service--Federal Communications Commission. Second report and order.

This Order eliminates the requirement that applicants in the Domestic Public Land Mobile Radio Service requesting one initial two-way frequency demonstrate a public need for the proposed service. This action will serve the public interest by making frequencies available for use by the public in a more timely manner, by reducing the costs associated with filing applications and by relieving the staff of an unnecessary processing burden. This action is necessary to speed service to the public and to reduce staff resources necessary to process applications.

Radio↗
PubMedDate not supplied

The development of human exposure standards for radio-frequency fields.

Biological effects and health implications of radio frequency (RF) electromagnetic fields have been a subject of scientific investigation for more than 50 years. It has become a focus of attention because of the expanded use of RF radiation in the frequency range between 300 MHz and 6 GHz for wireless communication over the past decade. Another cause for the attention is the uncertainty of some observed responses and lack of understanding of the mechanism of interaction of RF electromagnetic fields with biological systems. At present, considerable efforts are devoted to developing and revising RF exposure standards. Each of these efforts should aim to make explicit the philosophy and process by which they reason and decide guidelines for deeming exposure as safe. Furthermore, the reconciliation of philosophies of protection will definitely be an asset, in practice, to those interested in international harmonization of RF exposure standards.

Environmental Exposure↗
PubMed2000

AX.25 amateur packet radio as a possible emergency network.

In modern society more and more medical applications need a reliable data transfer. In emergency situations, such transfer may not be available because parts of the communications infrastructure may be affected. An alternative way could be the use of the amateur radio packet network, which offers almost global coverage. We analyzed its use as an emergency data transfer support, including transport of real-time medical data.

Computer Communication Networks↗
PubMed2001

[Immunotropic effects of electromagnetic fields in the range of radio- and microwave frequencies].

On the grounds of reviewed literature and the results of own experiments, the authors present current views on the possible immunotropic influence of low energy electromagnetic fields, in the range of radio- and microwave frequencies. They conclude, that a more systematic and multidisciplinary investigations should be undertaken, comprising the wide spectrum of immune homeostatic tasks, including defensive, immunoregulatory and pro-regenerative capabilities of immune system exposed to rapid environmental spread of different electromagnetic emitters.

Animals↗
PubMed2002

Impact of a radio frequency management information system on the process and timing of providing respiratory care services.

BACKGROUND: Although radio frequency (RF) systems have proliferated and are designed to simplify care delivery in many clinical settings, little information is available on the impact of such RF systems on the delivery of patient care. Having used a hand-held-device-based management information system in our Respiratory Therapy Section for 16 years, we assessed the impact of an RF system on the delivery of respiratory therapy (RT) services. METHODS: A single nursing unit dedicated to pulmonary and ear, nose, and throat care was selected for the RF system trial. Baseline (pre-RF) data were collected over 2 separate 1-month intervals (February 1999 and February 2000). The main outcome measures were (1) the amount of time needed at the beginning of the shift to organize and assign orders for RT services, (2) the time interval between notification of an RT consult order and completion of the RT consult, and (3) the time interval between notification of an RT treatment order and completion of the RT treatment. The activities required for organizing and assigning the orders were manually timed. Starting 6 weeks after therapists were trained to use the RF system, similar data were collected while using the RF system for two 1-month intervals (February and March 2001). RESULTS: The mean +/- SD time interval between receiving an RT consult order and completing the consult was reduced from 7.8 +/- 18.9 h to 2.8 +/- 2.4 h (p = 0.002). The percentage of patients who waited longer than 8 hours between receipt of a consult order and completion of the consult decreased from 18% to 4.7% (p = 0.026). The total time required for organizing and assigning RT work was reduced from 81.6 min to 43.6 min. CONCLUSIONS: The RF system had several advantages over the hand-held-device-based system: (1) shorter interval between the order for and completion of an RT consult, (2) lower percentage of patients for whom the interval between the order and the consult exceeded 8 hours, and (3) less time required to make shift assignments. These results invite assessment of whether accelerated delivery of RT services confers clinical benefits.

Allied Health Personnel↗
PubMed2002

[Archeology of the radio pharmaceutical advertisement].

After Second World War, a debate sets in France the partisans and the detractors of the radio advertisement, in particular pharmaceutical advertisement. In this article, the author revises campaigns led, during the thirties, by Robert Desnos for Armand Salacrou.

Advertising↗
PubMed1992

[Dosimetry in setting practical hygienic standards for radio-wave irradiation].

In dosimetric approach to the hygienic norm setting of radio waves adequate metrological basis is required. Joint investigations, carried by physicists and hygienists helped solve the new medical and technical problems, connected with the creation of individual dosimeters and indicators, monitor the hygienic norms of superhigh frequency electromagnetic waves. The devices are small, light, with autonomic power supply and digital indication of current exposure dose. The devices are supposed to give signals (light, sound) if the individual hygienic levels of superhigh frequency electromagnetic waves are surpassed.

Health Physics↗
PubMed2004

[Ultrastructural changes in rabbits cornea and sclera caused by radio frequency burn].

OBJECTIVE: To assess the influence of radio frequency (RF) burn on the ultrastructure of rabbits cornea, sclera, lens and retina. METHODS: The cornea and sclera of 24 adult New Zealand rabbits were burned by RF (power 15 W) for 10 seconds. The specimens of cornea, sclera, lens and retina were collected and examined under transmission electron microscopy (TEM) at 2 hours, 24 hours, 3 days and 14 days after burning. RESULTS: The TEM showed corneal epithelial cells nuclear chromatin pyknosis, stromal partial colloid fibers rupture, endothelial cells mitochondria turgescence and vacuolization; scleral fibroblastic nuclear chromatin pyknosis, rough endoplasmic reticulum distention, mitochondria turgescence; lens normal; retinal pigment epithelial cells mitochondria turgescence, photoreceptor cells outer segment disarrangement, inner segment mitochondria turgescence, and outer nuclear layer cells' nuclear chromatin pyknosis, 2 hours after burning. Corneal epithelial cells structure was fairly clear, some mitochondria of endothelial cells were turgescent, scleral fibroblastic mitochondria were slightly turgescent, and retinal structure was almost normal, 3 days after burning. There were no significant changes of cornea, sclera and retina in ultrustructure when the burnt groups were compared with the control group, 14 days after burning. CONCLUSION: These findings suggest that RF can cause direct lesion of cornea, sclera and indirect lesion of retina by burning cornea and selera, but the ultrastructural changes will almost recover 14 days after RF burning.

Animals↗
PubMed2003

Effects of low level pulsed radio frequency fields on induced osteoporosis in rat bone.

Effect of modulated pulsed electromagnetic fields (PEMFs; carrier frequency, 14 MHz. modulated at 16 Hz of amplitude 10 V peak to peak) on sciatic neurectomy induced osteoporosis in rat femur and tibia resulted in statistically significant increase in bone mineral density, and deceleration in bone resorption process and consequently further osteoporosis in rat bone. These results suggest that such an effective window of pulsed radio frequency fields may be used therapeutically for the treatment of osteoporosis.

Absorptiometry, Photon↗
PubMed2005

Externally placed vs intravaginally positioned radio frequency coils for quantitative spin-spin relaxometry of ovarian follicular fluid.

OBJECTIVE: To evaluate different imaging protocols, especially with respect to radio frequency (RF) receiver coil location, for their suitability in providing least squares derived quantitative T2 values of ovarian follicular fluid for investigations of basic ovarian physiology. METHODS: The ovaries of 10 women were imaged via magnetic resonance imaging (MRI) using externally positioned and intravaginally placed RF receiver coils. Half-Fourier acquisition with single-shot turbo spin-echo (HASTE), multiple-echo T2, Dixon, turbo spin-echo, and 3-dimensional (3D) fast imaging with steady-state precession (FISP) and time-reversed FISP (PSIF) sequences were used. Quantitative T2 nuclear spin relaxation rate information from the ovarian follicles between data acquired with the external and intravaginal coils were compared. Additionally, the amount of ovarian follicle and corpora lutea structural detail visible was qualitatively assessed. RESULTS: The T2 computations indicated that there was no difference in the follicular fluid T2 values or in the heterogeneity (spatial variance) of the T2 values between data acquired with the external RF coil and data acquired with the intravaginal RF coil. The best sequences for the visualization of ovarian internal structure were the 3D PSIF sequences and the multiple-echo T2-weighted images, confirming our earlier imaging work on excised cow ovaries. CONCLUSION: It is best to use an externally placed RF coil for quantitative MRI study of ovarian physiology given the lack of difference in quantitative T2 information and the difficulty associated with imaging the ovaries using an intravaginal RF probe.

Adult↗
PubMed1990

[University by radio and television in Great Britain. The Open University].

There are some 20 years since Great Britain was given a new and important University (established by a Royal Charter in 1969), especially intended for students wanting to achieve their education at home. The whole teaching, guided by tutors, is supported by various materials: booklets, audio- and videotapes which are completed by television and radio broadcasts for many courses and informations. After successful examinations are obtained the usual degrees and certificates delivered by the British Universities. Furthermore, this kind of education begins to be available in a few other countries (Belgium, Luxembourg, The Netherlands, Cyprus, Hong Kong).

Audiovisual Aids↗
PubMedDate not supplied

Radio advertising increases hospital call center volume by 48%.

Since the fall of 2005, call volume at University of Southern California University Hospital of Los Angeles' call center has increased by nearly 50%. How? The hospital embarked on a long-term radio campaign to promote its presence as a premier academic medical center and to increase patient volume.

Advertising↗
PubMed1991

[An analysis of informal veterinary consultations during radio programmes].

A sample of informal consultations based on letters which were sent to a radio programme in which the theme was informal veterinary consultations were analysed. The animal-owner profile, the identification of animals involved and the need which motivated owners to seek such consultations were investigated. The results indicated that the most typical animal owner to participate in programmes of this nature was an adult woman living in the country and the most common animal involved was an intact male dog. The most common area of concern was ethological of nature. Behavioural problems were the most common ethological problem, followed by management and care. The significance of this study for the veterinarian is probably that it recognises the role and importance of informal consultations, that deficiencies in formal consultations are indicated and that it emphasises the need of readily available knowledge of ethology, that informal consultations are unsuitable for serious cases, and that informal consultations give further insight into human-animal interaction from a veterinary perspective.

Age Factors↗