Airway Management Flashcards

When it is in the right place, where should the illuminated stylet's light be visible?

Answer: Front of the neck

When using an illuminated stylet for intubation, the light should be visible at the front of the neck, specifically in the midline just below the thyroid cartilage. This indicates that the stylet, and therefore the endotracheal tube, is correctly positioned within the trachea. Visibility on the sides or back of the neck would suggest incorrect placement, such as in the esophagus.

When employing the modified jaw-thrust maneuver because of a cervical injury, which action is NOT performed out?

Answer: Tilting the head

The modified jaw-thrust maneuver is specifically used for patients with suspected cervical spine injuries to open the airway without moving the head or neck. Therefore, tilting the head is explicitly avoided during this maneuver to prevent further injury to the spinal cord. The technique involves displacing the jaw anteriorly while maintaining neutral head alignment.

What is a significant disadvantage of mouth-to-mouth ventilation?

Answer: Disease transmission

A significant disadvantage of mouth-to-mouth ventilation is the risk of disease transmission between the rescuer and the patient. While the risk is generally low, it is a concern that has led to the widespread use of barrier devices like pocket masks with one-way valves. This concern is why alternative ventilation methods are often preferred in professional settings.

What is accurate regarding air that is inhaled after it has entered the lower airway?

Answer: It is body temperature and 100% humidified

The upper airway plays a crucial role in conditioning inhaled air. By the time air reaches the lower airway, it has been warmed to body temperature (approximately 37°C) and fully saturated with water vapor, becoming 100% humidified. This conditioning protects the delicate alveolar tissues and optimizes gas exchange.

What should be the first criteria examined while completing a primary evaluation of the patient's airway?

Answer: Ensure it is patent

The first and most critical step in a primary evaluation of a patient's airway is to ensure it is patent, meaning it is open and clear of obstruction. An obstructed airway prevents air movement, regardless of oxygen concentration or respiratory effort, and can rapidly lead to hypoxia and death. Establishing patency is foundational to all other respiratory interventions.

Which benefit of nasotracheal intubation is NOT thought to exist?

Answer: It is less traumatic for the patient

Nasotracheal intubation is generally considered more traumatic for the patient than orotracheal intubation due to the potential for nasal bleeding, discomfort, and difficulty passing the tube through the nasal passages. While it offers advantages like easier tube anchoring and patient comfort once placed, the insertion process itself is often more invasive and carries higher risks of trauma.

What is the main form of laryngeal cartilage?

Answer: Thyroid

The thyroid cartilage is the largest and most prominent cartilage of the larynx, commonly known as the 'Adam's apple.' It forms the anterior and lateral walls of the larynx and provides structural support, protecting the vocal cords and other delicate structures within. Its size and position make it the main form of laryngeal cartilage.

Which of the following does NOT justify giving oxygen to a hypoxic patient?

Answer: Increasing the percentage of expired oxygen

The primary goal of giving oxygen to a hypoxic patient is to increase the oxygen concentration in the inspired air, thereby increasing arterial oxygen levels and the amount of oxygen delivered to the patient's cells and tissues. Increasing the percentage of expired oxygen is not a therapeutic goal; rather, it's a consequence of inefficient oxygen utilization or excessive delivery.

Which does not preclude employing the esophageal obturator airway?

Answer: Persons over the age of 16

The esophageal obturator airway (EOA) is generally contraindicated in persons under 16 years old or under 5 feet tall due to anatomical size differences. It is also contraindicated in patients who have ingested caustic poisons or have a history of esophageal disease or alcoholism, as these conditions increase the risk of esophageal injury. Therefore, being over 16 years old is a precondition for its use, not a contraindication.

Which method is the most effective for verifying the endotracheal tube's correct placement?

Answer: Visualize the entire intubation process

Direct visualization of the endotracheal tube passing through the vocal cords is considered the most definitive and reliable method for confirming correct placement during intubation. While other methods like end-tidal CO2 detection, chest rise, and auscultation are crucial adjuncts, seeing the tube enter the trachea provides immediate and undeniable confirmation.

Which section of the pharynx is the topmost?

Answer: Nasopharynx

The pharynx is divided into three sections: the nasopharynx, oropharynx, and laryngopharynx (or hypopharynx). The nasopharynx is the topmost section, located posterior to the nasal cavity and superior to the soft palate. It serves as a passageway for air and connects to the middle ear via the Eustachian tubes.

How should the tubing of an esophageal obturator airway be held?

Answer: Like a pencil

When inserting an esophageal obturator airway (EOA) or similar supraglottic airway devices, the tubing or device should be held like a pencil. This grip allows for precise control, gentle manipulation, and accurate placement, minimizing the risk of trauma to the patient's airway structures during insertion. Proper technique is crucial for patient safety.

How much gas is typically expelled or inhaled during a respiratory cycle?

Answer: Tidal volume

Tidal volume is the amount of air that is typically inspired or expelled during a single, normal respiratory cycle at rest. It represents the volume of air exchanged with each breath. This measurement is crucial for assessing respiratory function and ensuring adequate ventilation.

What is the airway's superior-most portion?

Answer: Nasal cavity

The nasal cavity is the superior-most portion of the airway, serving as the primary entry point for air into the respiratory system. It is responsible for filtering, warming, and humidifying inhaled air before it proceeds to the pharynx and lower airway. The oral cavity is an alternative entry point but not the superior-most.

Which device generates high pressures?

Answer: Demand valve

A demand valve, often used with oxygen-powered resuscitators, can generate high pressures and deliver 100% oxygen. These devices are designed to provide positive pressure ventilation and can overcome airway resistance, but require careful monitoring to prevent barotrauma due to the high pressures they can produce.

What portion of the airway does gas exchange occur in?

Answer: Lower

Gas exchange, specifically the diffusion of oxygen into the blood and carbon dioxide out of the blood, occurs exclusively in the lower airway. This vital process takes place within the alveoli, which are tiny air sacs located at the ends of the bronchioles in the lungs. The upper airway primarily functions in air conduction and conditioning.