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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 39 (1984), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The use of the new Medishield anasthetic gas scavenging system with ventilators in the Siemens-Elema Servo 900 series was investigated. It was discovered that this combination of equipment creates the hazard that a disconnexion in the patient breathing system may not be detected by the ventilator alarm. This happens because the suction generated by the scavenging system draws a considerable flow of room air through the expiratory system of the ventilator when a disconnexion occurs. Possible solutions to the problem were investigated, and it was discovered that the problem can be overcome by applying a small amount of positive end-expiratory pressure to counteract the suction from the scavenging system.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 43 (1988), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We reviewed the maintenance records of lee vaporizers which had been in clinical use for up to 4 years. Tec 4s and Enfluratec 3s were found to be extremely reliable, but Fluotec 3s suffered progressively from mechanical and calibration problems. Their most recurrent fault was sticking valves caused probably by thymol crystallising on the valve faces. This fault did not occur with Fluotec 4s, which are designed to prevent liquid agent reaching the valve surfaces. We found, in a study of the effects of thymol accumulation, that only occasional draining of a Fluotec vaporizer is required to keep thymol concentration below the level at which its output is reduced. We conclude that, if regular field calibration checks are carried out as a safety measure, the service interval for Tee vaporizers could be extended beyond Ohmeda's present recommendation of one year.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 41 (1986), S. 0 
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The performance of the Travenol infusor when used to administer an intravenous infusion of analgesic after surgery has been investigated. Mean flow was very similar to the manufacturer's quoted figure of 2 ml/hour, but there was a large interindividual variation. Results from a laboratory study suggest that this was due to variation in the manufacture of the infusor.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 27 (1989), S. 631-634 
    ISSN: 1741-0444
    Keywords: Aerial ; Colonic ; Radio pill ; Telemetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Medical & biological engineering & computing 14 (1976), S. 465-470 
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire La calorimétrie, mettant en oeuvre la technique du type ‘gradient layer’ (Benzinger et Kitzinger 1949) est souvent pratiquée de nos jours pour étudier la désassimilation. On décrit l'utilisation d'une boîte ‘gradient layer’ d'origine commerciale à l'intérieur d'un système calorimétrique destiné à mesurer, directement et indirectement, les séquelles métaboliques des blessures thermales des rats. (a) la stabilité de la température ambiante (b) la stabilité de la température de la chemise d'eau de la boîte (c) l'emplacement et la grandeur de la source de chaleur d'étalonnage En effectuant des étalonnages avec des sources de chaleur stimulant le dégagement de chaleur d'un rat, on a démontré qu'une précision de mesure de ±2% est réalisable en contrôlant les éléments (a) et (b).
    Abstract: Zusammenfassung Kalorimetrie unter Verwendung der Gradientenschicht-Technik (Benzinger und Kitzinger, 1949) hat einen festen Platz in der Untersuchung des Energieumsatzes eingenommen. Es wird die Verwendung eines gewerblich gebauten Gradientenschichtkastens mit Kalorimetriesystem beschrieben, der so beschaffen ist, daß die Stoffwechselsequelae bei Verbrennungen von Ratten direkt und indirekt gemessen werden können. Es wurden Änderungen im abgegebenen Signal entdeckt. Auch wurde festgestellt, daß diese von folgenden Faktoren abhingen: (a) Stabilität der Raumtemperatur (b) Stabilität der Wassermanteltemperatur um den Gradientenschichtkasten (c) Lage und Größe der eichenden Wärmequelle. Eine Eichung mit Wärmequellen, die die Wärmeabgabe einer Ratte simulieren, zeigte, daß eine Meßgenauigkeit von ±2% durch Kontrolle von (a) und (b) erzielt werden kann.
    Notes: Abstract Calorimetry, using the gradient layer technique, has become well established in the study of energy metabolism. The use of a commercially constructed gradient layer box within a calorimetry system designed to measure directly and indirectly the metabolic sequelae of thermal injury in rats, is described. Variations in the signal output were discovered. These were found to be dependent upon: (a) stability of the ambient temperature (b) stability of the gradient layer box water jacket temperature (c) position and size of the calibrating heat source. Calibration with heat sources which simulate the heat emission from a rat, established that a measurement accuracy of ±2% can be achieved by controlling (a) and (b)
    Type of Medium: Electronic Resource
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