Respiratory and Airway Management Practice Questions

Q: Preoperative Samsoon and Young modified, Mallampati test is used for assessing:

Difficulty in intubation. ***Difficulty in intubation*** - The **Mallampati test** classifies the visibility of pharyngeal structures, which directly correlates with the **likelihood of difficult intubation**. - A higher Mallampati score (e.g., Class III or IV) indicates **less visibility of the soft palate, uvula, and fauces**, suggesting potential challenges during airway management. *Preoperative nutrition status of patient* - Preoperative nutritional status is assessed using methods like **albumin levels, BMI, and nutritional risk screening tools**, not the Mallampati score. - While patient health influences surgery, the Mallampati test is specifically for **airway anatomy**. *Patient's overall fitness for surgery* - Overall fitness for surgery involves a comprehensive assessment of **cardiac, pulmonary, renal, and metabolic health**, often using tools like the ASA physical status classification. - The Mallampati test focuses solely on **airway assessment** and does not provide a global measure of surgical fitness. *Blood requirement during surgery* - Blood requirements during surgery are estimated based on the **type of surgery, anticipated blood loss, patient's hemoglobin levels, and coagulation status**, not the Mallampati test. - The Mallampati test is entirely unrelated to **hemostasis or transfusion needs**.

Q: Rapid Sequence Induction is indicated in:

Emergency surgery for intestinal obstruction. ***Emergency surgery for intestinal obstruction*** - Rapid Sequence Induction (RSI) is indicated in situations where there is a high risk of **pulmonary aspiration** of gastric contents, such as in **intestinal obstruction**, due to a full stomach or impaired gastric emptying. - The goal of RSI is to achieve rapid intubation while minimizing the risk of aspiration by using a specific sequence of medications and techniques (e.g., cricoid pressure). *Cardiopulmonary bypass surgery* - This is an **elective procedure** where patients are typically fasted and have time for a thorough pre-operative assessment and standard induction. - While significant, it does not inherently carry the same immediate high risk of aspiration as an emergency with a full stomach. *Elective open hernia surgery* - This is an **elective procedure** where the patient can be properly fasted, significantly reducing the risk of a full stomach. - A standard, controlled anesthetic induction is generally preferred, allowing for gradual intubation and ventilation. *Elective laparoscopic surgery* - Similar to elective open surgery, patients undergoing **elective laparoscopic procedures** are properly fasted. - The primary concern in laparoscopic surgery is often related to pneumoperitoneum and its effects, rather than a high aspiration risk during induction if fasting guidelines are followed.

Q: In which clinical scenario would you find a patient requiring the resuscitation technique shown in the image?

Pulse and breath present. ***Pulse and breath present*** - The **recovery position** (lateral decubitus) is indicated for unconscious patients with **intact cardiovascular and respiratory function** to prevent **aspiration** and **airway obstruction**. - This position maintains a **patent airway** while allowing secretions to drain, preventing complications in post-ROSC or spontaneously breathing unconscious patients. *Pulse present, breath absent* - **Respiratory arrest** with intact circulation requires immediate **rescue breathing** or **bag-mask ventilation**, not positioning maneuvers. - The recovery position would delay critical **ventilatory support** needed to prevent hypoxic brain injury. *Pulse absent, breath present* - **Cardiac arrest** requires immediate **chest compressions** to restore circulation, making positioning secondary to life-saving interventions. - The recovery position provides no benefit when the primary problem is **absence of effective cardiac output**. *Pulse and breath both not present* - **Cardiopulmonary arrest** demands full **CPR** with chest compressions and rescue breaths in a **30:2 ratio**. - The recovery position is contraindicated as it prevents proper **chest compression** delivery and delays resuscitation efforts.

Q: The image shows the glottic view obtained during laryngoscopy for intubation. Which classification system is used to grade this laryngeal view?

Cormack and Lehane. The Cormack and Lehane classification is used to grade the laryngeal view during direct laryngoscopy for tracheal intubation. The image shows a laryngoscopic view of the vocal cords/glottis, so this is the appropriate grading system. Mallampati grading assesses the preoperative oropharyngeal view, not the laryngoscopic glottic view. The Myer-Cotton system grades the degree of subglottic stenosis. The Radkowski system stages juvenile nasopharyngeal angiofibroma, not post-intubation airway stenosis or laryngoscopic view.

Q: What is the purpose of Positive End-Expiratory Pressure (PEEP)?

To prevent atelectasis. ***To prevent atelectasis*** - PEEP maintains a positive pressure in the airways at the end of exhalation, which helps to keep **alveoli open** and prevents their collapse. - This recruitment of collapsed alveoli improves **oxygenation** and reduces the work of breathing. *To decrease preload* - While PEEP can indirectly decrease cardiac preload by increasing intrathoracic pressure, its primary purpose is not cardiovascular but rather respiratory. - The impact on preload is a potential side effect that requires careful monitoring, especially in patients with compromised cardiac function. *To increase venous return* - PEEP actually tends to **decrease venous return** due to increased intrathoracic pressure compressing the vena cava and reducing the pressure gradient for blood flow back to the heart. - This can lead to a reduction in cardiac output, which is a potential adverse effect. *To increase respiratory rate (RR)* - PEEP does not directly increase the respiratory rate; instead, it is a setting on a mechanical ventilator that affects lung volumes and oxygenation. - Respiratory rate is typically set independently or influenced by the patient's ventilatory drive.

Q: Identify the instrument shown in the image:

Uncuffed endotracheal (ET) tube. ***Uncuffed endotracheal (ET) tube*** - This image displays a transparent, flexible tube with visible depth markings in centimeters along its length and no inflated cuff near the distal tip, which is characteristic of an **uncuffed endotracheal tube**. - Uncuffed ET tubes may be used in **pediatric patients**; however, modern appropriately sized cuffed tubes are also commonly used in children. *Nasogastric tube* - A nasogastric tube typically has a much **smaller diameter** and a distinctly different tip design, often with multiple side ports for fluid aspiration or administration. - It does not feature the large, universal connector seen on endotracheal tubes. *Oropharyngeal tube* - An oropharyngeal (Guedel) airway is a **rigid, curved device** inserted into the mouth to maintain an open airway, and it looks distinctly different from the flexible tube shown. - It does not extend into the trachea like an ET tube. *Tracheostomy tube* - A tracheostomy tube is typically shorter, often with a curved neck flange for securement to the neck, and frequently made with an outer and inner cannula, which are absent in the image. - While it helps maintain an airway, its design is specific for insertion directly into a tracheostomy stoma, unlike the longer tube for oral/nasal intubation.

Q: The procedure shown in the image is performed to maintain the airway. Which of the following techniques is being used?

Jaw thrust. ***Jaw thrust*** - The image distinctly shows a rescuer performing a **jaw thrust maneuver** by placing fingers under the angles of the patient's mandible and displacing the jaw forward. - This technique is used to open the airway by lifting the tongue off the posterior pharyngeal wall, especially in cases of suspected **cervical spine injury**. *Head stabilization* - While important in trauma, **head stabilization alone** does not open the airway; it prevents movement without actively repositioning the jaw or head. - Head stabilization is a supportive technique, often used in conjunction with airway maneuvers, but it is not the primary airway-opening technique depicted. *In line manual stabilization* - **In-line manual stabilization** is a method where a rescuer holds the patient's head and neck in a neutral, in-line position to prevent movement, particularly during transport or other interventions. - This technique is used to protect the spine from further injury and prevents any movement from the head or neck. *Head tilt chin lift* - The **head tilt-chin lift** involves tilting the head back and lifting the chin, which is a different hand placement and body movement than what is shown. - This maneuver is contraindicated in suspected cervical spine injuries due to the risk of exacerbating spinal cord damage.

Q: In conventional oxygen therapy, which device will deliver the highest FiO2?

Non rebreathing mask. **Non rebreathing mask** - This device features a **one-way valve** between the mask and the reservoir bag, preventing exhaled air from mixing with fresh oxygen. This allows for the delivery of the **highest possible FiO2** among conventional oxygen therapy devices, often up to 90-100%. - The **reservoir bag** ensures a continuous supply of high-concentration oxygen during inspiration, maximizing the amount of oxygen inhaled. *Hudson mask* - Also known as a **simple face mask**, it delivers a moderate FiO2 (40-60%) at flow rates of 5-10 L/min. - The open ports on the sides allow for mixing of room air with oxygen, making it less efficient for delivering very high oxygen concentrations. *Venturi mask* - This device uses the Venturi principle to deliver a **precise and consistent FiO2** by entraining room air with oxygen. - While it provides controlled oxygen delivery, its maximum FiO2 typically ranges from 24-60%, which is lower than a non-rebreathing mask. *Nasal cannula* - The nasal cannula delivers a relatively low FiO2 (24-44%) at flow rates of 1-6 L/min. - It is designed for **low-flow oxygen delivery** and is not suitable for patients requiring high concentrations of oxygen.

Q: Endotracheal tube in the esophagus is best assessed by:

CO2 Exhalation. ***CO2 Exhalation*** - Measuring **CO2 exhalation** (capnography) is the most reliable method to confirm endotracheal tube placement, as CO2 is present in the trachea but not in the esophagus. - A persistent **waveform on the capnograph** indicates proper tracheal intubation. *Direct laryngoscopy* - While helpful for initial visualization during intubation, **direct laryngoscopy** cannot confirm continuous tracheal placement after the tube is advanced. - It only confirms the tube passing through the vocal cords, not its final position in the trachea versus esophagus. *Auscultation* - **Auscultation** can be misleading because stomach sounds can be transmitted to the chest, and breath sounds can be heard in the epigastrium even with esophageal intubation. - It relies on subjective interpretation and is less definitive than capnography. *Chest wall movement* - Observing **chest wall movement** is not a definitive sign, as the chest can still rise with esophageal intubation due to air entering the stomach. - This method is unreliable and can be mistaken for proper ventilation, leading to dangerous delays in correcting tube misplacement.

Question 1

Preoperative Samsoon and Young modified, Mallampati test is used for assessing:

Accepted Answer

Difficulty in intubation

Answer

Preoperative nutrition status of patient

Answer

Patient's overall fitness for surgery

Answer

Blood requirement during surgery

Question 2

Rapid Sequence Induction is indicated in:

Accepted Answer

Emergency surgery for intestinal obstruction

Answer

Cardiopulmonary bypass surgery

Answer

Elective open hernia surgery

Answer

Elective laparoscopic surgery

Question 3

A patient is found unresponsive. On assessment, the patient has a detectable pulse but absent normal breathing. What is the appropriate interpretation of this clinical finding?

Accepted Answer

Respiratory arrest requiring rescue breaths without chest compressions

Answer

Cardiac arrest requiring chest compressions only

Answer

Cardiac arrest requiring immediate CPR with chest compressions and rescue breaths

Answer

Normal finding requiring only monitoring

Question 4

In which clinical scenario would you find a patient requiring the resuscitation technique shown in the image?

Accepted Answer

Pulse and breath present

Answer

Pulse absent, breath present

Answer

Pulse and breath both not present

Answer

Pulse present, breath absent

Question 5

The image shows the glottic view obtained during laryngoscopy for intubation. Which classification system is used to grade this laryngeal view?

Accepted Answer

Cormack and Lehane

Answer

Myer-Cotton

Answer

Radkowski

Answer

Mallampati

Question 6

What is the purpose of Positive End-Expiratory Pressure (PEEP)?

Accepted Answer

To prevent atelectasis

Answer

To decrease preload

Answer

To increase venous return

Answer

To increase respiratory rate (RR)

Question 7

Identify the instrument shown in the image:

Accepted Answer

Uncuffed endotracheal (ET) tube

Answer

Nasogastric tube

Answer

Tracheostomy tube

Answer

Oropharyngeal tube

Question 8

The procedure shown in the image is performed to maintain the airway. Which of the following techniques is being used?

Accepted Answer

Jaw thrust

Answer

Head stabilization

Answer

In line manual stabilization

Answer

Head tilt chin lift

Question 9

In conventional oxygen therapy, which device will deliver the highest FiO2?

Accepted Answer

Non rebreathing mask

Answer

Hudson mask

Answer

Venturi mask

Answer

Nasal cannula

Question 10

Endotracheal tube in the esophagus is best assessed by:

Accepted Answer

CO2 Exhalation

Answer

Direct laryngoscopy

Answer

Auscultation

Answer

Chest wall movement

Respiratory and Airway Management — MCQs

Respiratory and Airway Management — MCQs

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