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- W2106049287 abstract "The effects of anaesthesia on upper airway reflexes in older animals have not been elucidated fully. We studied young (4-month-old) and old (28-month-old) guinea-pigs to examine the relationship between aspiration and altered upper airway reflexes during anaesthesia. We administered an adenovirus vector carrying Escherichia coli LacZ gene (Ad vector) intranasally to guinea-pigs with or without anaesthesia. LacZ gene expression was investigated in the nostrils and lungs of each animal under anaesthesia. No LacZ gene expression was found in the lungs of unanaesthetized animals given Ad vector. Thus intranasal administration of Ad vector was aspirated into the lower airways under anaesthesia. Next we examined the effect of age on anaesthesia-induced aspiration. At a lower concentration of halothane in 100% oxygen, greater LacZ gene expression in the lungs was measured in older than in younger animals, suggesting that older animals are liable to aspirate oropharyngeal contents into the lower airways during light anaesthesia. This novel animal model of aspiration using Ad vector may be useful to explore the mechanism of aspiration during and after anaesthesia in young and old animals." @default.
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- W2106049287 date "1999-08-01" @default.
- W2106049287 modified "2023-09-26" @default.
- W2106049287 title "A novel model of aspiration in young and old guinea-pigs using LacZ gene transduction of adenovirus vector" @default.
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- W2106049287 doi "https://doi.org/10.1093/bja/83.2.296" @default.
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