Presentation on theme: "Functions of the Conducting Zone 1. Provides a low-resistance pathway for air flow; resistance is physiologically regulated by changes in contraction."— Presentation transcript:
5 Functions of the Conducting Zone 1. Provides a low-resistance pathway for air flow; resistance is physiologically regulated by changes in contraction of airway smooth muscle and by physical forces acting upon the airways.2. Defends against microbes, toxic chemicals, and other foreign matter, cilia, mucus, and phagocytes perform this function.3. Warms and moistens the air.4. Phonates (vocal cords).
9 ALVEOLAR VENTILATIONAlveolar ventilation is defined as the volume of atmospheric air entering alveoli each minute.Minute ventilation is the total ventilation per minute.
10 Regulation of Respiration Respiratory CenterDorsal respiratory group of neurons - its inspiratory and rhythmicalfunctionPneumotaxic center limits the duration of inspiration and increases therespiratory rateVentral respiratory group of neurons - functions in both inspiration andexpirationPossibility of an “Apneustic Center” in the lower ponsLung inflation signals limit inspiration - The Herring-Breuer InflationReflexControl of Overall respiratory Center Activity
18 Orotracheal Intubation – Technique Advance laryngoscope into position (vallecula for curved blade; under epiglottis for straight blade)Elevate base of tongue and expose glottic opening
19 Orotracheal Intubation – Technique Elevate base of tongue further to fully expose glottic opening and surrounding anatomy
20 Orotracheal Intubation – Technique Insert endotracheal tube under direct vision to 23–25 cm at lipRemove stylet and laryngoscope, inflate tube cuffConfirm tube position – breath sounds, CO2 detectorSecure endotracheal tubeObtain chest radiograph
21 Orotracheal Intubation – Technique Straight blade position, elevating the epiglottisBe aware of laryngospasm when epiglottis is touched