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Oxygen enrichment of entrained room air during Venturi jet ventilation of children undergoing bronchoscopy
Author(s) -
BARAKA ANIS
Publication year - 1996
Publication title -
pediatric anesthesia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.704
H-Index - 82
eISSN - 1460-9592
pISSN - 1155-5645
DOI - 10.1046/j.1460-9592.1996.d01-12.x
Subject(s) - medicine , venturi effect , anesthesia , jet ventilation , oxygenation , bronchoscopy , oxygen , room air distribution , ventilation (architecture) , body orifice , flexible bronchoscopy , oxygen therapy , jet (fluid) , pulse oximetry , surgery , airway , mechanics , anatomy , mechanical engineering , chemistry , physics , organic chemistry , engineering , inlet , thermodynamics
Intermittent oxygen jet ventilation at an inspiratory:expiratory ratio of 1:3 was used to ventilate 15 children undergoing rigid Storz bronchoscopy for removal of inhaled foreign body. Oxygenation of the patient was continuously monitored by pulse oximetry. In all children S pO 2 was above 95% when the bronchoscope was above the carina. When the bronchoscope was introduced into one of the bronchi, S pO 2 decreased to 70–85% in five children. Delivery of a continuous flow of oxygen via a T‐piece attached to the side‐arm of the bronchoscope increased the S pO 2 >95% in the five children. Oxygen jet ventilation during bronchoscopy is based on the Venturi principle; the oxygen jet will entrain room air from the side arm of the bronchoscope which functions as an entrainment orifice. This will decrease the F IO 2 . The F IO 2 can be increased by flowing oxygen continuously via the T‐piece attached to the side arm of the bronchoscope.