Year: 2019
Type: article
Abstract: The work of breathing through north- and south-facing Portex Polar 'Blue-Line' paediatric tracheal tubes of sizes 3.0-7.0 mm ID has been measured using sinusoidal flow at equivalent ventilatory rates of 10-50 breaths min-1 with tidal volumes of 10-500 ml. North-facing tubes are designed to sit with the connection on the forehead after intubation, whilst south-facing ones are designed so that the connection sits on the chin of the patient. It was found that the total work of breathing through north-facing tubes is approximately 8% higher than the total work of breathing through south-facing tubes of the same size, irrespective of tidal volume or respiration rate. The total work of breathing was dependent on total tube length but independent of tube design. The endotracheal connectors themselves were found to contribute a significant proportion of the total work of breathing but there was no significant difference between the inspiratory and expiratory performance of the tubes.
Source: Egyptian Journal for Aquaculture
Authors: Emad Gad, Ahmed Abd El-Rahman, Adel Shalaby, Shimaa Metwally
Institutions: Suez Canal University, Agricultural Research Center
Language: English
Subfield: Aquatic Science
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W2408015913