منابع مشابه
The resistance of Entonox valves.
The resistances of thirteen Entonox valves were measured. Although there was a wide variation between them, this is unlikely to interfere with their performance when used in labour. During the passage of continuous high flows, freezing occurred in two valves, causing a reduction in flow after 5 minutes. It is very unlikely that this would occur in clinical use. Measurements of the resistances o...
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The minimum resistance of expiratory Heidbrink-type value has been assessed by determining the pressure decrease across the values at a flow rate of 30 litre min--1. The average resistance of 70 valves currently in clinical use was 318 Pa at that flow rate and about 44% had resistances greater than the limit of 294 Pa previously suggested. The resistances obtained in new valves were either simi...
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cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Entonox® analgesia for IUD insertions and removals.
We intend to begin offering Entonox (a medical anaesthetic gas comprising 50% nitrous oxide and 50% oxygen) as an analgesic choice for women attending for intrauterine device (IUD) fittings or difficult removals in our community contraception clinics. Entonox is already used for short-term pain relief in the community by district nurses and midwives, and in the hospital emergency and obstetric ...
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عصر روشنگری زمان شکل گیری ایده های مدرن تربیتی- آموزشی بود اما تاکید بیش از اندازه ی دوشاخه مهم فلسفی زمان یعنی عقل گرایی و حس گرایی بر دقت و وضوح، انسان عصر روشنگری را نسبت به دیگر تواناییهایش نابینا کرده و موجب به وجود آمدن افرادی تک بعدی شد که افتخارعقلانیتشان، تاکید شان بر تجربه فردی، به مبارزه طلبیدن منطق نیاکانشان وافسون زدایی شان از دنیا وتمام آنچه با حواس پنجگانه قابل درک نبوده و یا در ...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1974
ISSN: 0007-0912
DOI: 10.1093/bja/46.2.145