Question

Which of the following instrument insertion will be difficult:

• A. Nasogastric Tube
• B. LMA
• C. Tracheostomy
• D. Indirect Laryngoscopy

Hint:

The X-ray shows a tracheal problem. Which procedure must enter the tracheal lumen itself? That is the one made difficult.

Answer 1

The Correct Option is C

Step 1: Interpret the radiograph. The chest X-ray accompanying the question shows an abnormality of the trachea/neck (e.g. tracheal deviation, narrowing/stenosis or a mass effect) that distorts the airway in the region of the trachea. The instrument whose successful placement depends most on a normal, accessible trachea is what will be hardest.
Step 2: Map each instrument to the airway level it needs.
- Nasogastric tube passes through nose $\rightarrow$ pharynx $\rightarrow$ oesophagus $\rightarrow$ stomach. It does NOT enter the trachea, so a tracheal abnormality does not block it.
- LMA (laryngeal mask airway) sits in the hypopharynx over the laryngeal inlet; it is a supraglottic device and does not require passage down the trachea.
- Tracheostomy is the surgical creation of an opening directly INTO the trachea and insertion of a tube into the tracheal lumen. If the trachea is deviated, narrowed, compressed by a mass, or anatomically distorted (as the X-ray shows), reaching and cannulating the tracheal lumen becomes difficult and hazardous.
- Indirect laryngoscopy only VISUALISES the larynx with a mirror/scope; it does not insert anything into the abnormal trachea.
Step 3: Why option C is correct. Tracheostomy is the only listed procedure that requires direct entry into the diseased/distorted trachea seen on the X-ray, so its insertion will be the most difficult.
Step 4: Why the others are easier. NGT (oesophageal route), LMA (supraglottic), and indirect laryngoscopy (visualisation only) all bypass or do not depend on a normal tracheal lumen, so they are comparatively unaffected.
Final answer: C. Tracheostomy.