Direct Laryngoscopy Indian Medical PG Practice Questions and MCQs
Practice Indian Medical PG questions for Direct Laryngoscopy. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Direct Laryngoscopy Indian Medical PG Question 1: All of the following are advantages of LMA except:
- A. Alternative to Endotracheal intubation
- B. Prevent aspiration (Correct Answer)
- C. More reliable than face mask
- D. Does not require laryngoscope & Visualization
Direct Laryngoscopy Explanation: ***Prevent aspiration***
- While the **LMA** provides a seal for ventilation, it does not fully isolate the trachea from the esophagus, making it **less effective** than an endotracheal tube in preventing aspiration of gastric contents.
- Patients at high risk for aspiration (e.g., non-fasted, pregnant, or with reflux) are generally **contraindicated** for LMA use.
*Alternative to Endotracheal intubation*
- The **LMA** is a recognized alternative for airway management in many surgical procedures, especially those of **short duration** or when tracheal intubation is difficult.
- It provides an effective seal for ventilation and oxygenation in situations where a secure endotracheal tube is not immediately feasible or desired.
*More reliable than face mask*
- The **LMA** creates a much more reliable and consistent seal around the laryngeal inlet compared to a face mask, reducing the need for continuous manual jaw lift and improving ventilation.
- This improved seal minimizes gas leak and allows for more effective positive pressure ventilation.
*Does not require laryngoscope & Visualization*
- Inserrtion of an **LMA** is performed blindly, relying on anatomical landmarks rather than direct visualization of the vocal cords with a laryngoscope.
- This simplifies the insertion process and can be advantageous in difficult airway scenarios or when equipment for direct laryngoscopy is unavailable.
Direct Laryngoscopy Indian Medical PG Question 2: One of the most important complication of tracheostomy is:
- A. Hemorrhage
- B. Surgical emphysema
- C. Displacement of tube (Correct Answer)
- D. Recurrent laryngeal nerve palsy
Direct Laryngoscopy Explanation: ***Displacement of tube***
- **Accidental decannulation** or displacement of the tracheostomy tube is considered one of the most serious and common complications, particularly in the immediate post-operative period.
- This can lead to **loss of airway**, requiring immediate intervention to prevent severe hypoxia and potential brain injury or death.
*Hemorrhage*
- While hemorrhage can occur during or after tracheostomy, it is often a concern during the procedure or in the immediate postoperative period and is usually managed effectively.
- Significant, life-threatening hemorrhage such as **tracheo-innominate fistula** is a rare but severe complication.
*Surgical emphysema*
- Surgical emphysema (subcutaneous emphysema) is a relatively common but usually benign complication that occurs when air leaks from the trachea into the subcutaneous tissues.
- It typically resolves spontaneously and rarely poses a direct threat to the airway unless severe and rapidly progressive.
*Recurrent laryngeal nerve palsy*
- **Recurrent laryngeal nerve injury** is a rare complication of tracheostomy, as the nerve is usually well clear of the incision site in the neck.
- While it can cause hoarseness or vocal cord paralysis, it typically does not present an immediate life-threatening situation or emergency comparable to airway compromise.
Direct Laryngoscopy Indian Medical PG Question 3: Child with aspiration risk needs emergency surgery. Best induction sequence is:
- A. Preoxygenation-ketamine-succinylcholine
- B. Sevoflurane-propofol-succinylcholine
- C. Midazolam-propofol-rocuronium
- D. Preoxygenation-propofol-succinylcholine (Correct Answer)
Direct Laryngoscopy Explanation: ***Preoxygenation-propofol-succinylcholine***
- This sequence describes a **rapid sequence intubation (RSI)**, which is the preferred method for patients at high risk of aspiration, including children needing emergency surgery with an unknown fasting status.
- **Preoxygenation** provides an oxygen reserve during the apneic period, **propofol** offers rapid induction with good hemodynamic stability, and **succinylcholine** provides fast-onset, short-acting neuromuscular blockade, crucial for preventing aspiration.
*Preoxygenation-ketamine-succinylcholine*
- While preoxygenation and succinylcholine are appropriate for RSI, **ketamine** may not be the optimal choice for a child with aspiration risk due to its potential to increase secretions and maintain laryngeal reflexes, which could complicate intubation.
- Ketamine can also cause **emergence delirium** in some children, making it less favorable for a smooth anesthetic course compared to propofol.
*Sevoflurane-propofol-succinylcholine*
- **Sevoflurane** is an inhaled anesthetic often used for mask induction in children due to its non-pungent odor and rapid onset. However, it is generally **not suitable for RSI** in patients with aspiration risk as it has a slower induction time compared to intravenous agents and can cause coughing or laryngospasm.
- Using both sevoflurane and propofol for induction in an RSI scenario is redundant and prolongs the induction phase, increasing aspiration risk.
*Midazolam-propofol-rocuronium*
- **Midazolam** is a benzodiazepine used for anxiolysis and sedation but has a **slower onset** and longer duration of action compared to propofol for rapid induction.
- **Rocuronium** is a non-depolarizing neuromuscular blocker with a slower onset of action than succinylcholine, making it less ideal for RSI where immediate paralysis for intubation is critical to prevent aspiration.
Direct Laryngoscopy Indian Medical PG Question 4: During rapid sequence intubation in a child after taking brief history and clinical examination next step is:
- A. Administer oxygen (Correct Answer)
- B. Analgesic injection with Fentanyl
- C. Preanaesthetic medication with atropine and lignocaine
- D. IV anesthetic Diazepam/Ketamine
Direct Laryngoscopy Explanation: ***Administer oxygen***
- Pre-oxygenation with 100% oxygen is critical before **rapid sequence intubation (RSI)** to maximize **oxygen reserves** and extend the safe apnea time.
- This step helps prevent **hypoxemia** during the intubation procedure, especially in children who have lower functional residual capacity.
*Analgesic injection with Fentanyl*
- While fentanyl is often used in RSI for its **analgesic** and **sedative properties**, it typically follows pre-oxygenation and is administered as part of the **induction phase**, often concurrently with a paralytic.
- Administering fentanyl alone without prior oxygenation or other induction agents would not be the immediate next step in a structured RSI protocol.
*Preanaesthetic medication with atropine and lignocaine*
- **Atropine** may be used in children to prevent **bradycardia** during intubation, particularly in infants, but it's not the immediate next step after initial assessment; pre-oxygenation is more critical.
- **Lidocaine** can be used to blunt the sympathetic response to intubation or to suppress cough, but it's not universally required and comes after pre-oxygenation and other induction medications.
*IV anesthetic Diazepam/Ketamine*
- **Diazepam** and **ketamine** are **induction agents** that cause sedation and loss of consciousness, but they are administered after pre-oxygenation and often just before the paralytic agent.
- Administering an induction agent without adequate pre-oxygenation would increase the risk of **hypoxemia** during the subsequent apnea.
Direct Laryngoscopy Indian Medical PG Question 5: The safest initial approach to open the airway of a patient with maxillofacial trauma is:
- A. Head tilt-chin lift
- B. Jaw thrust technique (Correct Answer)
- C. Head lift-neck lift
- D. Heimlich procedure
Direct Laryngoscopy Explanation: ***Jaw thrust technique***
- This technique is preferred in cases of **maxillofacial or suspected cervical spine trauma** as it minimizes neck movement, thereby reducing the risk of further injury.
- It involves grasping the angles of the mandible and **lifting the jaw anteriorly**, which moves the tongue away from the posterior pharynx to clear the airway.
*Head tilt-chin lift*
- This maneuver is contraindicated in trauma settings where a **cervical spine injury** is suspected, as it can extend the neck and exacerbate spinal cord damage.
- While effective for opening the airway in non-trauma patients, it involves **significant neck movement** which is unsafe in maxillofacial trauma.
*Head lift-neck lift*
- This is not a recognized or safe technique for airway management, especially in trauma patients, as it would cause **unnecessary and potentially harmful movement** of the head and neck.
- There is no clinical scenario where this technique would be recommended over established airway maneuvers.
*Heimlich procedure*
- The Heimlich procedure (abdominal thrusts) is used to relieve **severe foreign body airway obstruction** and is not an initial approach to open an airway due to general trauma.
- It is an intervention for choking, not for managing an airway in a patient with maxillofacial trauma where the primary concern is often **tongue prolapse** or significant structural injury causing obstruction.
Direct Laryngoscopy Indian Medical PG Question 6: A 50-year-old smoker presents with hoarseness, dysphagia, and weight loss. Flexible laryngoscopy shows a mass on the vocal cords. What is the next best step?
- A. Direct laryngoscopy with biopsy (Correct Answer)
- B. MRI of neck
- C. CT scan of neck
- D. Radiotherapy
Direct Laryngoscopy Explanation: ***Direct laryngoscopy with biopsy***
- A definitive diagnosis of a vocal cord mass requires **histological examination** to rule out malignancy, especially given the patient's risk factors (age, smoking) and symptoms (hoarseness, dysphagia, weight loss).
- **Direct laryngoscopy** allows for a thorough, magnified view of the mass and precise biopsy collection, which is superior to flexible laryngoscopy alone for definitive diagnosis and staging.
*MRI of neck*
- While MRI can provide excellent soft tissue detail for **staging** a known malignancy, it cannot provide a **histological diagnosis**.
- It would typically be performed after a biopsy confirms malignancy to assess the extent of the tumor and potential spread.
*CT scan of neck*
- A CT scan is useful for evaluating **bony involvement**, lymph node status, and tumor extension for **staging purposes**, but it is not a diagnostic tool for identifying the specific type of tissue or cell pathology.
- Like MRI, a CT scan would generally follow a biopsy confirming malignancy.
*Radiotherapy*
- **Radiotherapy** is a treatment modality for laryngeal cancer, not a diagnostic step.
- Initiating treatment without a definitive histological diagnosis of malignancy would be inappropriate and potentially harmful.
Direct Laryngoscopy Indian Medical PG Question 7: You evaluate an 18 yrs old male who sustained a right sided cervical laceration during a gang fight. Which of the following is a relative rather than an absolute indication for neck exploration?
- A. Dysphonia
- B. Expanding hematoma
- C. Pneumothorax (Correct Answer)
- D. Dysphagia
Direct Laryngoscopy Explanation: ***Pneumothorax***
- A pneumothorax, while concerning, can often be managed with a **chest tube** insertion without immediate surgical exploration, making it a relative indication.
- Its presence suggests potential compromise to structures in the neck/chest but doesn't always mandate direct surgical wound exploration as a first step.
*Dysphonia*
- **Hoarseness or difficulty speaking** after a neck injury suggests potential direct laryngeal, tracheal, or recurrent laryngeal nerve injury, warranting exploration to assess and repair.
- This symptom implies a direct compromise of the **airway or critical nerves**, making exploration more immediate.
*Expanding hematoma*
- An **expanding hematoma** indicates active, potentially life-threatening bleeding and/or mass effect, which can compromise the airway or blood supply to the brain.
- This is an **absolute indication for immediate surgical exploration** to control hemorrhage and prevent airway obstruction.
*Dysphagia*
- **Difficulty swallowing** post-neck trauma suggests injury to the pharynx or esophagus.
- Such injuries carry a significant risk of **mediastinitis** or sepsis if not promptly identified and repaired via surgical exploration.
Direct Laryngoscopy Indian Medical PG Question 8: Steps of intubation - arrange in sequence:- a. Head extension and flexion of neck b. Introduction of laryngoscope c. Inflation of cuff d. Check breath sounds with stethoscope e. fixation of the tube to prevent dislodgement
- A. CBAED
- B. ACBED
- C. DBCEA
- D. ABCDE (Correct Answer)
Direct Laryngoscopy Explanation: **ABCDE**
- The correct sequence for intubation starts with proper patient positioning (**A. Head extension and flexion of neck**) followed by insertion of the laryngoscope (**B. Introduction of laryngoscope**).
- After visualizing the glottis and inserting the endotracheal tube, the cuff is inflated (**C. Inflation of cuff**), tube placement is confirmed by checking breath sounds (**D. Check breath sounds with stethoscope**), and finally, the tube is secured (**E. Fixation of the tube to prevent dislodgement**).
*CBAED*
- This sequence is incorrect because inflating the cuff (C) and introducing the laryngoscope (B) occur before head positioning (A), and checking breath sounds (E) and fixation (D) are not in the correct order after intubation.
- Proper patient positioning is the critical first step to align the oral, pharyngeal, and laryngeal axes for optimal visualization.
*ACBED*
- This sequence incorrectly places the inflation of the cuff (C) before the introduction of the laryngoscope (B) and confirmation steps (E and D).
- The cuff is inflated only after the tube is properly placed in the trachea, and confirmation of placement always precedes fixation.
*DBCEA*
- This sequence is incorrect as it begins with checking breath sounds (D), which is a step for confirming tube placement, not initiating the intubation process.
- Head positioning (A) is also placed last, which is contrary to the vital initial steps of airway management for intubation.
Direct Laryngoscopy Indian Medical PG Question 9: What is the staging system used for the condition seen in the patient after a history of intubation, as shown in the image?
- A. Cormack and Lehane (Correct Answer)
- B. AJCC
- C. TNM
- D. Radkowski
Direct Laryngoscopy Explanation: ***Cormack and Lehane***
- The **Cormack and Lehane classification** system is used to grade the view of the **larynx** during **direct laryngoscopy** for intubation.
- Given the history of intubation and the image showing the laryngeal view, this system is the most appropriate for staging the visual difficulty or success of intubation.
*AJCC*
- The **American Joint Committee on Cancer (AJCC) staging system** is primarily used for **oncological staging**, classifying the extent of cancer.
- It is not relevant for assessing the view of the larynx during intubation.
*TNM*
- **TNM staging** (Tumor, Node, Metastasis) is a widely used system for classifying the **progression of cancer**.
- This system is specific to cancer staging and is not applicable to the assessment of airways for intubation.
*Radkowski*
- The **Radkowski staging system** is used to classify **pediatric subglottic stenosis**, a narrowing of the airway below the vocal cords.
- While it deals with airway issues, the question focuses on the view during intubation, not the severity of subglottic stenosis, and the image does not specifically point to this condition.
Direct Laryngoscopy Indian Medical PG Question 10: In correct positioning the tip of the instrument shown in the image should lie at:
- A. Thyroid cartilage
- B. Above esophagus
- C. Vocal cords
- D. Epiglottis (Correct Answer)
Direct Laryngoscopy Explanation: ***Epiglottis***
- The image shows a **Laryngeal Mask Airway (LMA)**, which is designed to sit in the hypopharynx, with its tip resting at the **epiglottis**.
- This positioning allows the LMA to create a seal around the laryngeal inlet, facilitating effective ventilation without entering the trachea.
*Vocal cords*
- The LMA is designed to provide a seal *above* the vocal cords, ensuring ventilation of the trachea without direct intubation of the vocal cords themselves.
- Positioning the tip *at* the vocal cords would hinder proper airway sealing and could cause trauma.
*Thyroid cartilage*
- The thyroid cartilage is an anterior neck structure and is not the anatomical landmark for the tip of a properly placed LMA.
- The LMA sits deeper in the pharynx, above the glottic opening, making the epiglottis the relevant landmark.
*Above esophagus*
- While the LMA sits **above the esophageal inlet**, diverting air primarily into the trachea, its *tip* specifically rests at the epiglottis, covering the laryngeal opening.
- Stating "above the esophagus" is too general; the precise anatomical placement for the tip is at the epiglottis.
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