RESUMO
Thirty-one patients who were undergoing cardiopulmonary bypass for elective aortic valve replacement were studied. The effects on some aspects of lung function of intravenous methyl prednisolone, administered immediately before bypass, were assessed by measuring alveolar-arterial oxygen differences and shunt fractions. No significant differences in pulmonary function were found between the treated and control groups. The use of methyl prednisolone in this context is not justified.
Assuntos
Ponte Cardiopulmonar , Metilprednisolona/uso terapêutico , Insuficiência da Valva Aórtica/cirurgia , Ensaios Clínicos como Assunto , Método Duplo-Cego , Feminino , Humanos , Injeções Intravenosas , Pulmão/efeitos dos fármacos , Masculino , Metilprednisolona/administração & dosagem , Oxigênio/sangue , Pressão Parcial , Placebos , Período Pós-OperatórioRESUMO
A simple, safe, and extremely inexpensive system is described for removing anaesthetic waste gases from the operating theatre, by utilising such equipment and facilities as already exist in most modern operating departments.
Assuntos
Anestesia por Inalação/instrumentação , Equipamentos e Provisões Hospitalares , Salas Cirúrgicas/normas , Ventilação , Anestesia por Inalação/economia , Custos e Análise de Custo , Gases , LondresRESUMO
Plastic and rubber tubing, of the types used frequently to convey anaesthetic gases to and from the patient, or anaesthetic waste gases out of the operating theatre, were assessed for their capacity to allow diffusion of halothane through the tube wall. The magnitude of this effect has been calculated in relation to pollution of the operating theatre atmosphere under different circumstances.
Assuntos
Poluição do Ar , Halotano , Difusão , Salas Cirúrgicas , Plásticos , BorrachaRESUMO
Four different charcoals have been assessed by exposure to halothane in air until 10, 100 and 500 p.p.m. (v/v) effluent was detectable. The pattern of halothane adsorption, its practical implications and the behaviour of different adsorbers has been demonstrated. The effluent concentration from a charcoal canister should be not more than 10 p.p.m. during the adsorption of 1.5% halothane from a gas flow of 5 litre/min. When 100 p.p.m. is detectable the charcoal should be considered exhausted.
Assuntos
Poluição do Ar , Carvão Vegetal , Halotano , Adsorção , Salas CirúrgicasRESUMO
A logical development of the closed circuit is described, from a basic resuscitation device, through various modifications, to a circle system incorporating an oxygen demand valve, adsorbers for both carbon dioxide and halothane, and some specific safety features. The behaviour of the circuits has been investigated in relation to elimination of nitrogen, concentrations of halothane and circuit leaks.
