Used and refurbished patient monitoring equipment

Patient monitoring covers multiparameter and vital signs monitors, transport monitors, telemetry systems and central stations, defibrillators and AEDs, ECG carts, pulse oximetry, capnography, and fetal monitoring.

The category turns over quickly in large facilities, which keeps a steady supply of capable equipment moving into practices and clinics that never needed the newest generation in the first place. A monitor several generations behind measures blood pressure exactly as accurately as one released this year. What it may not do is talk to your network, and that is where the real evaluation sits.

What varies most between two units that look identical

Parameter modules and enabled options. This is the defining variable in the category. Two monitors of the same model can carry entirely different parameter sets — one with ECG, SpO2 and NIBP, another adding invasive pressures, capnography, cardiac output or anaesthetic agent monitoring. Some parameters are physical modules that slot in; some are software options enabled per serial number; some are both. A monitor sold "fully loaded" means nothing until the parameter list is written down. Ask which parameters are physically present and which are licensed, and ask for a photograph of the monitor powered on showing its actual parameter set.

The cables, cuffs and sensors. Monitoring accessories are proprietary, model-specific and priced accordingly, and they are the most common thing missing from a used monitor. ECG lead sets, SpO2 sensors and their extension cables, NIBP cuffs and hoses, invasive pressure cables, temperature probes, capnography sampling lines and adapters — each is specific to the manufacturer and often to the generation. A monitor arriving with no accessories is a screen. Price the accessory set before you commit, not after.

Batteries. Every portable and transport monitor has a battery, every battery is a consumable, and a monitor that will not hold a charge is a monitor that has to stay plugged in. Ask how long the unit runs on battery from full charge, and treat any answer under a useful working period as a replacement cost to be added to the purchase.

Network and central station compatibility. Where a monitor is meant to feed a central station or telemetry system, the two have to be compatible at the software generation level, not merely the same brand. Confirm the software version on the monitor and on the receiving system, and confirm that the wireless module — where one is fitted — matches the network the system will actually run on. This is the failure that most often turns a good monitor into a stranded one.

On defibrillators, the whole consumable chain. Battery, pads and their expiry dates, paddles, cables, and whether the unit passes its self-test. On any defibrillator, confirm what testing regime your setting requires before it can be put into service.

What to confirm before buying

• The complete parameter list, physical and licensed, for that specific serial number
• Every cable, cuff, sensor and lead set named individually
• Battery age and battery run time from a full charge
• Software version, and compatibility with any central station or telemetry system it must join
• Wireless module presence and the network standard it supports
• Whether the mount, stand, roll stand or wall bracket is included
• Whether the manufacturer will support or re-register the equipment under a new owner
• On defibrillators, pad expiry, self-test status and required testing before use
• That the display has no dead pixels, burn-in or touchscreen dead zones — ask for a powered-on photograph

Freight, delivery and installation

Monitoring is the easiest category in medical equipment to ship. Most monitors are small enough to move as parcel freight rather than palletised freight, they are not fragile once packed properly, and delivery access is rarely a constraint. Confirm the seller packs accessories and cables in the same shipment and packs them properly — a bent connector pin on an invasive pressure cable is a quiet, expensive way to lose the benefit of a good purchase.

Central stations, telemetry receivers and their antenna infrastructure are the exception. Those are installed systems with network and cabling requirements, and where an antenna network is involved the installation is a project with a site survey attached rather than a delivery. Treat a central station and the monitors that feed it as one purchase with one compatibility question, and settle that question before either half ships.

Where several monitors are being bought at once, ask whether they can be consolidated into a single shipment. Freight priced per shipment rather than per item is where equipping a whole department changes arithmetic.