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Resistance of tracheal tubes 3.0 and 3.5 mm internal diameter
Author(s) -
BLOM H.,
RYTLANDER M.,
WISBORG T.
Publication year - 1985
Publication title -
anaesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.839
H-Index - 117
eISSN - 1365-2044
pISSN - 0003-2409
DOI - 10.1111/j.1365-2044.1985.tb11052.x
Subject(s) - medicine , mallinckrodt , flow resistance , airway resistance , tracheal tube , nuclear medicine , anesthesia , anatomy , flow (mathematics) , intubation , respiratory system , mechanics , physics , family medicine
Summary The resistance of RAE, Rüsch, Mallinckrodt paediatric and Portex plain nasal and oral tracheal tubes with internal diameters 3.0 mm and 3.5 mm was calculated at air flows of 1 to 10 litres per minute. The flow resistance profiles of RAE and Rusch tracheal tubes was generally higher than those of Mallinckrodt paediatric and Portex plain tubes. All RAE and Rüsch nasotracheal tubes of size 3.0 mm internal diameter and orotracheal tubes 3.0 mm internal diameter had a flow resistance exceeding 3.0 kPa litres/second at an airflow of 4 litres/minute. It is concluded that these tracheal tubes ought only to be used with assisted or controlled ventilation.