FINITE ELEMENT MODELING OF A MAINSTREAM CAPNOMETER SYSTEM FOR NON-INTUBATED PEDIATRIC PATIENTS REQUIRING OXYGEN ADMINISTRATION

摘要

Capnometry is the standard of care to measure the amount of carbon dioxide in the proximal airway, detect apnea, tracheal tube dislodgement, and effectiveness of ventilation during invasive mechanical ventilation in critically ill infants, children and adults [1]. Capnometry is not yet standard practice for non-invasively supported or ventilated patients, due to dead space ventilation, inspiratory gas washout, gas entrainment, and potential for rebreathing of gas. Potential capnometry use in non-intubated patients could identify impending respiratory failure, obstructed airways, and improve the safety and effectiveness of non-invasive support for infants and children [2]. A method to deliver oxygen to a non-intubated patient is via an oxygen mask placed over the nose and mouth of the patient, however capnography with mask patients is not common because the measurement is not accurate. In this project, we sought to show the feasibility of capnography with a novel oxygen mask/capnometry system in a pediatric patient.