What factors control the caliber of the bronchi?
What factors control the caliber of the bronchi?
Human airway muscle virtually lacks adrenergic innervation, but adrenergic nerves may influence airway caliber by acting on bronchial vessels, mucous glands, and parasympathetic nerves and ganglia.
How do you deal with difficult intubation?
Handling: General handling of difficult intubation, use of special material including a portable unit, and confirmation of the endotracheal position of an endotrachaeal tube are outlined (CO2 et, SaO2, fibreoptic bronchoscopy, direct visualization of the translaryngeal position of the tube).
Which conditions can increase airway resistance?
Bronchospasm, mucus plugging, and edema in the peripheral airways result in increased airway resistance and obstruction. Air trapping results in lung hyperinflation, ventilation/perfusion (V/Q) mismatch, and increased dead space ventilation.
What is the most significant factor affecting airway resistance?
One of the most important factors influencing airway resistance is the diameter of the airway. In general, the opposition of flow can be described as the pressure divided by the rate of flow (R = change in P/V). However, factors such as turbulent or laminar flow also impact the resistance to flow in the lungs.
What causes a difficult intubation?
The main factors implicated in difficult endotracheal intubation were poor dental condition in young patients, low Mallampati score and interincisor gap in middle-age patients, and high Mallampati score and cervical joint rigidity in elderly patients.
How can you tell if someone is protecting the airway?
If you insert a tube from the outside to the inside to open up the upper airways and the patient doesn’t need supplemental oxygen or increased ventilation, then that is airway protection.
What can cause a difficult airway?
Neck trauma may result in the inability to move the head safely, and difficult intubation may be secondary to non-optimized positioning. In all patients with neck instability, in-line stabilization should be performed during every intubation attempt. Obesity can also contribute to a difficult airway.