Essentia / Devices / Laryngoscope

Device Lab 59

Laryngoscope

A rigid curved spatula on a hook-on handle, lit by a fibre bundle that carries light from the handle lamp to a polished exit port near the tip. The blade is reusable stainless and goes through a wash and a steam cycle between uses.

Also called: Video Laryngoscope. Arabic: منظار الحنجرة. Device Lab 59 of 69 in BMEssentia Medical City, 2 configurations.

Overview: the configurations

How it works: the main parts

What each part does, from the Laryngoscope lessons in the 3D Device Lab.

Handle barrel

The handle is the input arm of a lever, and almost everything else about it follows from that. It is a hollow stainless barrel that your hand closes around, and the resultant of that grip acts at one point roughly two thirds of the way down it.

Knurled grip band

The knurled band is where the hand actually meets the instrument, and it is the only part of the device designed around the fact that the operator may be wearing wet gloves. It is a moulded elastomer sleeve with raised longitudinal ribs, bonded over the middle third of the barrel.

Cell stack

Two cells in series, stacked nose to tail inside the handle barrel, held down by a return spring at the bottom and making contact at the top. They are the entire energy supply for the light, and on both configurations the light is the only thing that lets anybody see anything at all.

Hook-on fitting and latch contact

The hook-on fitting is the interface between the handle and the blade, and it is doing three jobs at once. It is a hinge, so the blade can be folded for storage.

Lamp housing

The lamp housing is the small can that holds the emitter, sets where it points and gets rid of its heat. On both configurations it sits at the top of the handle just below the saddle, angled so its output aims into whatever is latched on.

Light-emitting diode

The emitter is a small white light-emitting diode on a carrier, sitting behind the housing window. It is the origin of the entire optical chain on both configurations, and it is the point at which a quantity of electrical energy becomes a quantity of luminous flux poured into a cone.

Blade heel and locking bar

The heel is the thick block at the near end of the blade that engages the hook bar and turns the whole spatula into a rigid extension of the handle. It carries the slot that drops onto the bar, the face the latch pawl catches, and the pad the contact pin presses against.

Spatula

The spatula is the curved blade proper: the long, shallow trough that runs from the heel out to the tip. It is the output arm of the lever and it is also the part that decides where the output arm ends, because the straight line from the hinge to the tip is the distance every reaction is divided by.

Common faults and what to check

Most reported device problems (FDA MAUDE)

Raw counts of adverse event reports for this device type (FDA product code CCW, CAL), all years. Not adjusted for the number of units in use, so they show what gets reported, not failure rates. Report text is never copied.

Planned maintenance checks

From the BMEssentia procedure library: every 12 months, about 15 minutes, electrical class II, applied part type B.

Test instruments: Light meter (optional).

Recent FDA recalls

From the FDA recall database (openFDA), newest first, imported 2026-10-22. 64 recalls on record for this device type. Recall text is the FDA's public text; each recall links to the official record.

Learn it, see it in 3D, ask about it

• Ask Essentia about the Laryngoscope: answers from named sources, with the device open in its 3D Device Lab beside the answer.
• The Laryngoscope on the BMEssentia Platform: the Device Library course, 13 sections from physics to maintenance.
• BMEssentia Medical City: Device Lab 59, the Laryngoscope fully assembled in 3D, with lab tasks and the simulations.

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