Question:easy
Murphy's eye is seen in which device?
Murphy's eye is seen in which device?
Show Hint
It is a side vent hole near the tip of an airway tube that prevents total occlusion.
Updated On: Jun 24, 2026
- Macintosh laryngoscope
- Endotracheal tube
- LMA
- Flexible laryngoscope
Show Solution
The Correct Option is B
Solution and Explanation
Step 1: The term being tested is an eponym. "Murphy eye" names a specific safety feature, so the task is to match it to the airway equipment that has it.
Step 2: Picture an ETT tip. There are two openings near the end - the large slanted main lumen opening and a smaller round perforation on the opposite side wall. That second perforation is the Murphy eye, and a tube that has it is described as a Murphy-type tube.
Step 3: Function-wise it is a backup ventilation port. Should the primary tip opening abut mucosa or be plugged, fresh gas continues to enter and leave through this lateral hole, guarding against total occlusion of the airway.
Step 4: Of the listed items, only the endotracheal tube is an indwelling airway tube with a tip. Laryngoscopes (Macintosh, flexible) are instruments for visualisation, and the LMA seals over the glottis rather than entering the trachea, so none of them carry a Murphy eye.
\[\boxed{\text{Endotracheal tube}}\]
Step 2: Picture an ETT tip. There are two openings near the end - the large slanted main lumen opening and a smaller round perforation on the opposite side wall. That second perforation is the Murphy eye, and a tube that has it is described as a Murphy-type tube.
Step 3: Function-wise it is a backup ventilation port. Should the primary tip opening abut mucosa or be plugged, fresh gas continues to enter and leave through this lateral hole, guarding against total occlusion of the airway.
Step 4: Of the listed items, only the endotracheal tube is an indwelling airway tube with a tip. Laryngoscopes (Macintosh, flexible) are instruments for visualisation, and the LMA seals over the glottis rather than entering the trachea, so none of them carry a Murphy eye.
\[\boxed{\text{Endotracheal tube}}\]
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