PubMed · 5196468
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1969-09-19. Disposable procedure pack service.. https://pubmed.ncbi.nlm.nih.gov/5196468/
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BACKGROUND: Relationships between selected fabric characteristics and the barrier effectiveness of surgical gown fabrics to liquid strike-through and bacterial transmission were examined. METHODS: Eight commercially available surgical gowns were evaluated in this study. Five of the gowns were disposable and were produced from nonwoven fabrics. Three of the gowns were reusable and were produced from woven fabrics. Standard test methods were used to evaluate the fabrics. Fabric characteristics evaluated included thickness, weight, pore size, and oil and water repellency. Yarn count was determined for the woven fabrics to establish the number of yarns per inch in both the warp (lengthwise) and fill (crosswise) fabric direction. Resistance of the fabrics to the penetration of microorganism suspensions under a hydrostatic pressure was determined. Microorganisms used in this study were ESCHERICHIA COLI AND STAPHYLOCOCCUS AUREUS: Scanning electron micrographs are presented to illustrate differences among fabrics. RESULTS: Results of this study showed that fabric characteristics of construction, repellency, and pore size contributed to gown performance. Liquid strike-through was not always accompanied by bacterial transmission. CONCLUSIONS: Higher fabric repellency ratings and smaller pore size generally corresponded with higher barrier properties.
The requirement to phase out mercuric oxide (mercury) batteries on environmental grounds has led to the widespread introduction of zinc-air technology. The possibility arises that high drain hearing aids may not be adequately catered for by zinc-air cells, leading to poor performance. This study investigated the hearing aid user's ability to perceive differences between zinc-air and mercury cells in normal everyday usage. The data was collected for 100 experienced hearing aid users in field trials. Users report 50 per cent greater life for zinc-air cells in high power aids and 28 per cent in low power aids. The average life of the zinc-air cells range from 15 days in high power to 34 days in low power aids. Users are able to perceive a difference in sound quality in favour of zinc-air cells for low and medium power aids. The hearing aid population is not disadvantaged by phasing out mercury cells.