Umidificação e aquecimento do gás inalado em estação de anestesia com baixo fluxo de gases frescos com ou sem isolamento térmico do circuito ventilatório e com ou sem permutador de umidade e temperatura

Detalhes bibliográficos
Ano de defesa: 2015
Autor(a) principal: Oliveira, Sergius Arias Rodrigues de [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/139382
http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/11-05-2016/000857965.pdf
Resumo: Background: Tracheal intubation limits the normal warming and humidifying functions of a patient's upper airways. An inhaled gas minimum moisture target of 20 mgH2O.L­1 is recommended to reduce the deleterious effects of dry gas on the airways. The Fabius GS Premium anesthesia workstation (Dräger Medical, Lübeck, Germany) has a built-in hotplate to heat gases in the breathing circuit. The use of a low fresh gas flow (FGF) in the breathing circuit increases the temperature and humidity of the inhaled gas and a heat and moisture exchanger (HME) can be used to further heat and humidify the inhaled gas. The corrugated tubes of the breathing circuit are composed of materials with low thermal insulation (TI), and the temperature and humidity of the gases in the circuit are influenced by the cold operating room temperature. The aim of this study was to compare the temperature and humidity of the inhaled gases from a low-flow Fabius anesthesia workstation with or without TI of the breathing circuit and with or without an HME. Methods: Forty-one adult female patients were randomly allocated into four groups according to the devices coupled to the breathing circuit from a Dräger Fabius GS Premium anesthesia workstation, used to ventilate their lungs using a breathing circle system with a low FGF (1 L.min­1): control (n = 11), with TI (n = 10), with an HME (n = 10) or with TI and an HME (TIHME) (n = 10). The temperature and humidity of the inhaled gases were measured close to the tracheal tube using a thermo-hygrometer. Measurements were obtained at 10, 30, 60, 90 and 120 minutes after connecting the patients to the breathing circuit. Results: The mean inhaled gas temperature was higher in the HME and TIHME groups (29.2 ± 1.3°C and 30.1 ± 1.2°C, respectively) compared with the control and TI groups (27.5 ± 1.0°C and 27.2 ± 1.1°C, respectively; P = 0.003). The mean inhaled gas absolute humidity was ...