Allergy to dyes in permanent-press bed linen.
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The results of physicochemical examination of 32 kinds of unwoven fabrics as well as the examination of 7 kinds of the three-level dressings, operation, and bed clothes are reported. The fabrics consisted of polypropylene and viscose fibres, dilana, argona, polyamides and bonding agents (fixatives). In their water extracts the content of the chloride, sulphate and alkaline ions, reductors, the presence of heavy metals, the surface active substances and the pH were determined. The practical applicability of the dressings was tested in 300 cases. The dressings were well tolerated by the patients. The operation and bed clothes as well as the surgical clothes made from unwoven fabric and sterilized by radiosterilization may facilitate, the great deal of work in the operation units and in surgical wards.
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OBJECTIVE: To discover the cause of an outbreak of facial rash in a holiday centre. DESIGN: Questionnaire survey of those with rash; analysis of samples of linen. SETTING: Holiday centre in south west England. PATIENTS: 98 holiday-makers presenting to the first aid post with a facial rash. INTERVENTION: Replacement of bed linen with new linen in selected parts of the site. RESULTS: The attack rate was 7.0-14.2/1000 for most accommodation areas in the centre, but in one accommodation area the rate was zero. The pH of rinse water from sheets varied from 7.4 to 9.0. Those parts of the accommodation provided with new linen had zero attack rates. CONCLUSION: The facial rash resulted from irritation from washing powder retained owing to insufficient rinsing during laundering. Modifications to the rinsing process led to a gradual disappearance of the rash.
Fifty mattress dust samples from private houses were examined--all were mite infested. Dermatophagoides pteronyssinus occurred in all samples and accounted for 81% of all mites. In thirty-two paired samples the total mite population of bedroom floor dust was only 10% of that found in the corresponding mattress dust. D. pteronyssinus was the dominant species in both and the population of this mite amounted to 7-5% of that found in the mattress dust. An analysis of mattress dust from 100 hospital beds showed that ninety-four mattresses were mite free; the other six contained only seven mites, all D. pteronyssinus. It is suggested that frequent changing and washing of bed linen and brushing and cleaning of mattresses were the main factors in preventing mite infestation in the Cardiff hospitals.
The aim of the study was to determine if using linen in hospital beds affects patients' well-being. An experimental group consisting of 52 patients (mean age: 64.4 years) at a medical ward used linen in the bottom sheet, the protective sheet, the pillow-case and the patient gown for 4 weeks. A control group consisting of 40 patients (mean age: 67.5 years) at the same ward was observed for 4 weeks using the conventional material (cotton, cotton/polyester). Marginal positive effects on patients' well-being were noted when linen was used. It was discussed that the relative importance of the bed material to patients' well-being may be low, compared to medical treatment, nursing, etc. Given the high cost of linen, about 15 times more than the conventional material, it was suggested that the health care system should refrain from large-scale use of linen in hospital beds.
Of 52 infants who had died suddenly and were referred to autopsy, nine had lain on adult water beds for the first time; five had died as a result of accidents; two had died on water beds; two were in beds with widely spaced slats; and one had died as a result of strangulation. Three deaths were due to overlying. Three other infants had been placed on sheepskin rugs for the first time and were found dead shortly thereafter. These infants ranged in age from 2 to 9 months, except for a severely mentally retarded nine-year-old with spastic paraplegia. We believe that a general warning should be issued concerning water beds and that soft bedding should not be used for infants. Infants should not be placed unattended or left to sleep on water beds; only beds recommended for infants should be used. Overlying of a young infant is most likely to occur on a water bed, or if the parent is obese or has consumed alcohol.
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In the Caspian Sea region of Iran asthma seems closely related to house dust allergy. Since a high proportion of house dust sensitive patients appear to be sensitive to house dust mites, an investigation was carried out to determine the occurrence, distribution and abundance of these species in Iranian house dust in order to assess their role and clinical importance in house dust allergy in Iran. Thirty-five samples of house dust collected from houses in the Caspian Sea region and five samples from other areas were examined for mites. The three pyroglyphid species Dermatophagoides pteronyssinus, D. farinae and Euroglyphus maynei, reported by European and Japanses workers to be common in house dust and to be a major source of house dust allergens, were found to occur in Iranian house dust and to account for nearly two-thirds of the total mit population present in the dust. Dermatophagoidex pteronyssinus was the most frequent and most numerous species recorded, occurring in 90% of the samples examined and forming 94% of the pyroglyphid and 60% of the total mite population. The frequency with which house dust mites were found in the Iranian Caspian Sea region coupled with the relatively high frequency of allergic bronchial asthma in this area suggests that they may well be an important precipitating factor in asthma in Iran.
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Various different effects of ELF magnetic fields have been reported to occur at the cellular, tissue, and animal levels. Certain effects, such as the induction of magnetophosphenes in the visual system, have been established through replication in several laboratories. Many other effects, however, have not been independently verified or, in some cases, replication efforts have led to conflicting results. A substantial amount of experimental evidence indicates that the effects of ELF magnetic fields on cellular biochemistry, structure, and function can be related to the induced current density, with a majority of the reported effects occurring at current density levels in excess of 10 mA/m2. These effects, therefore, occur at induced current-density levels that exceed the endogenous currents normally present in living tissues. From this perspective, it is extremely difficult to interpret the results of recent epidemiological studies that have reported a correlation between cancer incidence and exposure to 50-Hz or 60-Hz magnetic fields with very low flux densities. The levels of current density induced in tissue by occupational or residential exposure to these fields are, in nearly all circumstances, significantly lower than the levels found in laboratory studies to produce measurable perturbations in biological functions. There is a clear need for additional epidemiological research to clarify whether exposure to ELF magnetic fields is, in fact, causally linked to cancer risk. Laboratory animal studies conducted under controlled conditions are also needed to determine whether ELF magnetic fields can initiate or promote tumors. In addition, more studies of both a theoretical and experimental nature are needed to elucidate the molecular and cellular mechanisms through which low-intensity magnetic fields can influence living systems. A growing body of evidence indicates that cell membranes play a key role in the transduction and amplification of ELF field signals. Elucidation of the physical and biochemical pathways that mediate these transmembrane signaling events will represent a major advance in our understanding of the molecular basis of magnetic field effects of biological systems.
The water bed has ushered in a new era in prophylactic care for patients suffering from the sequetiae of spinal cord injury and other debilitating diseases which have rendered the skin susceptible to decubitus ulceration. A commercially available water bed is described which has resulted from improvements to a prototype bed first used in the spinal injuries unit of Prince Henry Hospital in 1969 (Jones and Burniston, 1971).
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