REBREATHING DURING CONTROLLED RESPIRATION WITH VARIOUS SEMICLOSED ANAESTHETIC SYSTEMS
نویسندگان
چکیده
منابع مشابه
A composite semiclosed anaesthetic system suitable for controlled or spontaneous respiration.
FOR patients who are breathing spontaneously the Magill attachment or system A (Mapleson, 1954) is the most widely used semiclosed anaesthetic system. A theoretical analysis predicted that if the freshgas inflow were made at least equal to the patient's minute-volume ventilation, then rebreathing would be eliminated (Mapleson, 1954). A similar conclusion has been reached experimentally by vario...
متن کاملAlveolar gas relationships during the use of semi-closed rebreathing anaesthetic systems.
A black box and a geometrical approach have been used to deduce the relationships between alveolar oxygen and carbon dioxide concentrations when rebreathing occurs during the use of semi-closed anaesthetic rebreathing systems.
متن کاملCarbon dioxide rebreathing with the anaesthetic conserving device, AnaConDa®.
BACKGROUND The anaesthetic conserving device (ACD) AnaConDa(®) was developed to allow the reduced use of inhaled agents by conserving exhaled agent and allowing rebreathing. Elevated has been observed in patients when using this ACD, despite tidal volume compensation for the larger apparatus dead space. The aim of the present study was to determine whether CO(2), like inhaled anaesthetics, adso...
متن کاملHow rebreathing anaesthetic systems control PaCO2: studies with a mechanical and a mathematical model.
Results from a proposed equation for rebreathing systems, (formula: see text), were compared with results from a mechanical model "lung" ventilated either with a Bain Breathing Circuit, or a circle system (Eger-Ethans type A) without soda lime. When values for carbon dioxide excretion (VCO2), dead spacetidal volume ratio (VD/VT), minute volume ventilation (VE), and fresh gas flow (VF) were vari...
متن کاملThe oxygen and volatile anaesthetic delivery characteristics during spontaneous ventilation using a non-rebreathing coaxial anaesthesia system.
The gas delivery characteristics during simulated spontaneous ventilation of a non-rebreathing adaptation of the Bain circuit were examined. Tidal volumes were varied from 200 to 600 ml and respiratory rate from 8 to 20 breaths per minute obtaining characteristics for a minute volume range from 2.4 to 12 litres/minute. The minimum inspired oxygen concentration with 1 litre/minute 100% oxygen fr...
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ژورنال
عنوان ژورنال: British Journal of Anaesthesia
سال: 1961
ISSN: 0007-0912
DOI: 10.1093/bja/33.8.374