Building a Preventive Maintenance Program for Imported Used Equipment

Acquiring well-inspected used medical equipment is only the beginning. The long-term safety, reliability, and cost-effectiveness of that equipment depends on a structured preventive maintenance (PM) program sustained over its entire working life at the receiving facility. This is especially true for imported used equipment, which often operates without direct manufacturer support and in environments with different power quality, climate, and spare parts availability than the country of origin. This article draws on World Health Organization (WHO) medical device technical guidance to outline how hospital biomedical engineering teams and importers can build a realistic, sustainable PM program.

Why Preventive Maintenance Is Different From Repair

WHO's Medical Equipment Maintenance Programme Overview distinguishes clearly between two categories of maintenance activity that every program must plan for (WHO Medical Device Technical Series, Medical Equipment Maintenance Programme Overview):

• Inspection and Preventive Maintenance (IPM): scheduled, proactive procedures — performance inspections, safety inspections, and preventive maintenance tasks — intended to keep equipment operating correctly, keep it safe for patients and operators, and extend its service life while reducing failure rates.
• Corrective Maintenance (CM): unscheduled troubleshooting and repair performed after a fault or failure has already occurred.

A mature program is judged not by how well it repairs equipment after failure, but by how much unscheduled downtime and safety risk it prevents through IPM in the first place.

Step 1: Build and Prioritize Your Equipment Inventory

Every maintenance program begins with an accurate device inventory — the foundation WHO identifies as the first planning step, since "the clinical engineering department should identify and select the devices to be included in the medical device inventory" (WHO, 3.4 Health Technology Management).

Inventory Checklist

• Record make, model, serial number, and asset ID for every device
• Note acquisition source (new, used/refurbished, donated) and acceptance test date
• Classify by clinical risk level (e.g., life-support vs. general diagnostic) to prioritize PM frequency
• Record location/department and responsible clinical unit
• Attach or link the manufacturer's service manual and user manual
• Note manufacturer's recommended PM interval, if available
• Flag equipment with limited or discontinued manufacturer support — this affects spare parts planning

Step 2: Choose a Maintenance Methodology

WHO guidance directs programs to analyze, for each device category, "the most efficient methods to maintain the various devices," which may include in-house maintenance, manufacturer service contracts, or third-party service providers depending on complexity, criticality, and available in-house skill (WHO, 3.4 Health Technology Management).

For imported used equipment, methodology decisions should also weigh whether local staff are trained on the specific model, whether appropriate test equipment is available locally, and whether spare parts can realistically be sourced given the device's age and support status.

Step 3: Set IPM Frequency and Procedures

Preventive maintenance tasks — routine cleaning, calibration, adjustment, inspection for wear, and lubrication — should follow a defined schedule rather than an ad hoc basis. General guidance for resource-constrained settings recommends that "the frequency suggested in the manufacturer's manual can be used as a guide, but the amount of actual usage should determine the maintenance procedure required" — meaning heavily used equipment should be inspected and maintained more frequently than lightly used equipment of the same model (Ministry of Health, Maintenance of Medical Equipment and Devices).

WHO's technical series organizes maintenance responsibility into three practical levels (Ministry of Health, Maintenance of Medical Equipment and Devices):

IPM Procedure Checklist (per device, per scheduled visit)

• Follow a written procedure template for each equipment type/model (WHO provides sample templates for units such as anesthesia machines, ECG monitors, infusion pumps, and mobile X-ray systems)
• Perform manufacturer-specified inspection points (filters, tubing, seals, connectors, moving parts)
• Perform functional/performance verification relevant to the device
• Perform an electrical safety check consistent with your incoming inspection protocol
• Lubricate, adjust, or calibrate per the service manual
• Document all findings, parts replaced, and pass/fail outcome on a standardized work order
• Update the equipment record and schedule the next IPM date

Step 4: Plan for Spare Parts and Service Manuals

Two resources determine whether a maintenance program can actually execute its schedule: spare parts availability and access to service documentation. WHO's donation guidance is explicit that equipment "for which replacement parts are unavailable should be donated only if they are destined 'for parts only'" and that a minimum of two, preferably four, years of manufacturer sales support — including spare parts and troubleshooting assistance — should be confirmed before accepting used equipment (WHO, Donation Guidelines).

Spare Parts and Documentation Checklist

• Confirm availability of critical spare parts before placing equipment into service, not after a failure occurs
• Maintain a stock of high-failure-rate consumables and wear parts identified from the manufacturer's manual or field experience
• Secure both the user manual and the service/maintenance manual in a language understood by local staff — WHO donation guidance emphasizes that manuals should be provided "in a language understood by the recipient" (WHO, Medical Device Donations: Considerations for Solicitation and Provision)
• Build or subscribe to a technical library covering all equipment models in the inventory
• Establish a relationship with the original manufacturer, an authorized distributor, or a reputable third-party parts supplier before support needs become urgent
• For obsolete or unsupported models, evaluate decommissioning rather than continuing to operate equipment without a parts pathway

Step 5: Track Performance and Improve the Program

A maintenance program should be measured, not just operated. WHO's framework identifies specific performance indicators (WHO Medical Device Technical Series, Medical Equipment Maintenance Programme Overview):

A computerized maintenance management system (CMMS) — even a simple spreadsheet-based version for smaller operations — helps track due dates, completion rates, and repair history, and is specifically recommended in WHO's technical series as a tool for scaling a maintenance program (WHO, Management and Safe Use of Medical Devices).

Program Performance Checklist

• Track and report IPM completion rate monthly
• Review IPM "yield" — are inspections actually catching problems, or just checking boxes?
• Log all corrective maintenance events, including cause and downtime duration
• Identify devices with recurring failures for possible replacement rather than continued repair
• Reassess IPM frequency periodically based on actual failure and usage data, not just the original schedule
• Maintain a reminder/scheduling system — card index, calendar, or CMMS — so that due maintenance is never missed

Special Considerations for Imported Used Equipment

Facilities relying on used or refurbished imported equipment should treat the first year of a device's life at the new location as a data-gathering period. Local voltage stability, humidity, dust exposure, and usage patterns can all differ substantially from the equipment's prior operating environment, and failure patterns may not match the original manufacturer's assumptions. WHO donation and device-management guidance recommends that the recipient and donor or supplier agree on a maintenance plan for used devices, particularly covering the period after any original warranty has lapsed or does not extend to the new location (WHO, Medical Device Donations: Considerations for Solicitation and Provision).