Airway Flashcards
First step in assessing a patient
Airway management
Upper airway consists of:
Nasal cavity
Pharynx
Larynx
Lower Airway consists of:
Trachea, it’s branches, and the lungs
Primary control centers come from the:
Medulla
Pons
Primary involuntary respiratory center
Medulla
Connected to the respiratory muscles by the vagus nerve
Pons
Chemical stimuli - receptors for oxygen and carbon dioxide balance are located:
Carotid bodies (carotid sinus)
Aortic arch
Primary control of respiratory center stimulation
Cerebrospinal (CSF) pH
CSF is affected by the:
Amount of carbon dioxide in the body
Form of respiratory drive in which the body uses oxygen
Hypoxic Drive
Patients who are somewhat dependent on a hypoxic drive to breath normally only saturate at around ___% oxygenation
90-92%
Factors that increase respiration
Body temperature
Emotion
Pain
Hypoxia
Acidosis
Stimulant drugs
Factors that decrease respiration
Depressant drugs, Sleeping agents
Morphine
When there is no oxygen available at all
Anoxia
SaO2
Arterial oxygen saturation
PaO2
Arterial oxygen tension
Is the fraction or percentage of oxygen in the space being measured.
Used to represent the percentage of oxygen the patient is breathing
Fraction of inspired oxygen (FiO2)
Literally means “deficient in oxygen”, that is an abnormally low oxygen availability to the body or an individual tissue or organ
Hypoxia
Insufficient oxygenation; that is decreased partial pressure of oxygen in blood
Hypoxemia
Non-invasive method allowing the monitoring of the saturation of a patient’s hemoglobin
Pulse oximeter
Pulse ox
Normal readings
95-100%
Pulse ox
Values under ___ are considered low and a clinical emergency
90%