What to inspect before buying a used ventilator

A ventilator that looks immaculate and a ventilator that has been properly refurbished are different things, and from the outside they are indistinguishable. Here is what to ask for.

1. The test record, across the range you will use

Not a pass certificate — the actual figures. A ventilator should be verified at both ends of the tidal volume range it will be set to, not at one comfortable mid-point. A unit accurate at 500 mL and drifting at 50 mL is dangerous precisely in paediatric and neonatal use, which is where small volumes live.

Ask for pressure support and PEEP to be verified too, not only volume.

2. Every alarm, triggered and confirmed

Disconnection, high pressure, low pressure, apnoea, power loss, gas failure. Each one should have been deliberately provoked and observed. An alarm that has been silenced rather than fixed is the single most dangerous thing that can be sold with a ventilator.

3. The internal battery, which is always older than it looks

Batteries degrade on a shelf as well as in service, so a unit that has spent six months in a container may hold very little charge regardless of its hours. Ask for the measured runtime under load, not the rated figure from the manual. The battery is what carries the patient during a transfer or a power cut, which in much of Pakistan is not a hypothetical.

4. Consumables, and whether anyone stocks them here

Patient circuits, filters, flow sensors and oxygen cells are recurring costs for the life of the machine. A ventilator that needs a circuit no one in Pakistan carries becomes a monthly procurement problem. Confirm local availability before you buy, not after.

The oxygen sensor cell in particular is a consumable with a defined service life, typically measured in months of use. If a refurbishment did not replace or test it, the refurbishment is not finished.

5. What was replaced versus what was inspected

Ask for both lists separately. A supplier who can hand you "replaced: O2 cell, internal battery, patient valve diaphragm; tested: flow calibration full range, alarm verification, leak test" is describing work that happened. A supplier who says "fully refurbished" and nothing else is describing a clean.

6. Who attends when it fails

The last question and the most important one. Establish the response time, whether parts are held locally, and whether a maintenance contract is available. As covered in how we work, we treat service as part of the supply rather than a separate sale, because a ventilator without local engineering support is not a working asset.

A note on the rest of the bed

A ventilator rarely arrives alone. If you are equipping or re-equipping a critical care bed, the same inspection logic applies to the patient monitor and the infusion pumps beside it — and standardising the monitors across a unit is far cheaper than discovering later that they will not report to one central station.

Working out what you need? Tell us the department, the bed count and the case mix — message us on WhatsApp or send an enquiry and we will tell you what is on the floor.