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Korean Journal of Pediatrics 2006;49(11):1194-1201.
Published online November 15, 2006.
Usefulness of modified ambu in patients who need artificial ventilation
Kee Soo Ha, Il Hong Moon, Hee Sun Lee, Dong Han Shin, So Hee Eun, Baik-Lin Eun, Young Sook Hong, Joo Won Lee
Department of Pediatrics, College of Medicine Korea University, Seoul, Korea
인공 환기가 필요한 환자에서 변형된 수동식 인공호흡기(Ambu )의 유용성
하기수, 문일홍, 이희선, 신동한, 은소희, 은백린, 홍영숙, 이주원
고려대학교 의과대학 소아과학교실
Correspondence:  Baik-Lin Eun,
Email: bleun@chollian.net
Abstract
Purpose
: The comatose mentality can be catastrophic, especially if the condition is severe or the duration is prolonged. Therefore, delayed diagnosis can result in a poor outcome or death. The best radiologic modality to differentiate from cerebral lesions in patients suffering from cerebral diseases is magnetic resonance imaging (MRI) rather than computed tomography (CT). Special apparatuses with metal materials such as ventilators, and cardiac pacemakers belonging to patients cannot be located in the magnetic field. We aimed to exhibit the possibility of examining MRI, maintaining ventilation at a relative long distance by means of modified Ambu¢c.
Methods
: Self-inflating bags as a sort of a manual ventilator, connected with relatively long extension tubes instead of mechanical ventilators, were adopted to obtain MRI. PVC (polyvinyl chloride) extension tubes had different lengths and diameters. Lengths were 1, 2, and 3 cm and diameters were 15, and 25 mm. The work of breathing and expiratory changes of expiratory tidal volume (TVe), minute volume of expiration (MVe), peak inspiratory pressure (PIP) were measured by use of the mechanical ventilator, Servoi¢c, as the alteration of TVi (inspiratory tidal volume), extension tube lengths and diameters with other values fixed.
Results
: Measured TVe and MVe by ventilator were the same values with control at every TVi, regardless of extension tube lengths and diameters, but PIP were increased with the rise of TVi, tube lengths, with decline of tube diameters, these were statistically significant.
Conclusion
: MRI examination can be carried out with a self-inflating bag connected with an extension tube at a long distance in patients who need artificial ventilation.
Key Words: Magnetic resonance imaging , Ventilation , Tidal volume
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