Essentia / Devices / Infant Incubator

Device Lab 48

Infant Incubator

The loop closes on an air temperature sensor sitting at the defined reference point above the centre of the mattress. The controller compares that reading with a setpoint and modulates a heating element until they agree, which they do within about half a minute. Nothing in this configuration measures the baby, nothing touches the baby, and the baby’s temperature is whatever the resulting environment gives it.

Also called: Neonatal Incubator. Arabic: حاضنة الأطفال. Device Lab 48 of 69 in BMEssentia Medical City, 2 configurations.

Overview: the configurations

How it works: the main parts

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

Mains inlet, isolation and alarm battery

An inlet, a fuse, a switch and an earth stud on the service face, and behind them two things worth separating: a transformer that isolates the patient from the supply, and a sealed battery whose only job is to keep the alarm alive after the supply has gone.

Stand, column and castors

A wheeled base, a single telescoping column with a clamp collar and a foot pedal, a drawer slung under the machine and an intravenous pole on one corner. It looks like furniture and three of its properties are engineering ones.

Double-walled hood

Two panes of clear acrylic three millimetres thick with a ten-millimetre air gap between them, bonded into moulded edges, lifting off in one piece. It is what makes this machine recognisable across a room, and its inner surface is the single most consequential temperature in the device.

Iris portholes and front access panel

Four circular ports with soft silicone cuffs and hinged clear doors, and a front wall that is entirely a drop-down access panel. Everything that is ever done to this patient is done through one of them, and each one is a hole in the boundary the machine is maintaining.

Cable and tube access grommets

Slotted rubber discs in both end walls, four of them, through which a ventilator circuit, three infusion lines, a probe lead and a set of monitoring leads all pass at once. They cost almost nothing and they are the largest continuous leak in the compartment.

Mattress tray, tilt and slide

A moulded tray with a raised lip, running on steel rails so that it slides out over the dropped front panel, with a lever at the head end that tilts it about twelve degrees either way and a cassette slot underneath.

Mattress

A foam slab in a welded wipe-clean cover, with a fitted sheet over it and a rolled nesting support along one side. It is the route everybody names first when asked how a baby loses heat in an incubator, and it is under one per cent of the answer.

Air intake filter

A pleated cartridge behind a grille low on the back of the base unit, with a latch and a date window. Everything this patient breathes for however many weeks they are in here came through it.

Explore it in the Device Lab

• The four routes, and which one the loop can reach: Set an infant and a compartment, then read the four heat-loss routes side by side against the infant’s total metabolic heat production.
• What the second pane actually buys: Compute the hood’s resistance as the series chain it physically is, the film on the inside, a pane, an air gap, a pane, the film on the outside, and then compute the inner surface temperature from the fraction of that chain lying on the inside of it.
• The one lever that is larger than the heater: Set a very preterm infant, then change only the humidity and watch the evaporative loss, the insensible water loss and the air temperature the loop demands.
• Three time constants, and the display shows the fastest: Compute the thermal capacity of the compartment air, of the inner hood pane and of the infant, and divide each by its conductance to its surroundings.
• Two loops, one hardware, opposite failures: Run the same infant, the same bay and the same humidity on both configurations, and change only which variable is being held.

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 FMZ, FPL), 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.

Standards engineers test against

Recent FDA recalls

From the FDA recall database (openFDA), newest first, imported 2026-10-22. 44 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 Infant Incubator: answers from named sources, with the device open in its 3D Device Lab beside the answer.
• The Infant Incubator on the BMEssentia Platform: the Device Library course, 13 sections from physics to maintenance.
• BMEssentia Medical City: Device Lab 48, the Infant Incubator fully assembled in 3D, with lab tasks and the simulations.

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