21.2 Equipment, Maintenance and Study Supplies
Key Takeaways
Equipment suitability depends on intended use, configuration and relevant accuracy controls.
Out-of-calibration findings need assessment of affected historical measurements.
Supply planning should consider usability, expiry and timing rather than box count alone.
Equipment, Maintenance and Study Supplies
Equipment and supplies affect both participant safety and measurement reliability. The ECO includes equipment use and maintenance, ongoing calibration and management of study supplies. A CRA should verify the actual protocol requirements, suitable equipment, trained users and continued control. A calibration sticker is useful evidence, but it is not the whole assessment of whether a critical measurement is trustworthy.
Start with intended use: what is measured or performed, required accuracy/range, operating conditions, compatible consumables and relevant software/configuration. Determine who owns and maintains the equipment, what checks are required, who receives failure alerts and what backup is available. Not every site needs the same equipment or service interval. Apply the protocol, manufacturer instructions and applicable quality process.
Qualification and records
Identify the equipment so service records can be linked to actual use. Relevant evidence can include an identifier, installation/acceptance checks, calibration or maintenance records, operating instructions, user training and changes. The extent depends on risk and intended use. A device used only for a low-impact administrative purpose does not necessarily need the same controls as a primary-endpoint instrument.
| Control | Question | Evidence example |
|---|---|---|
| Identity | Which instrument produced the result? | Equipment ID linked to source/output |
| Suitability | Does it meet the protocol's intended use? | Required range, configuration and acceptance evidence |
| Maintenance | Was it functioning as expected at the relevant time? | Service/inspection records and issue history |
| Calibration | Were required accuracy checks current? | Traceable calibration/check evidence where applicable |
| Competence | Could the operator perform the task? | Task training and any required certification |
| Continuity | What happens if it fails? | An appropriate tested backup or response process |
Avoid inventing universal requirements such as a generator for every storage unit, a specific national calibration body for every device, or an identical annual service schedule. Those may be appropriate under a particular study plan. The underlying question is whether the controls manage the actual risk adequately and whether staff follow them.
Equipment failure during conduct
Suppose a primary-endpoint scale is discovered to be out of calibration. Identify the instrument, last acceptable check, detection date, relevant use and affected measurements. Notify the investigator and sponsor/technical function. Determine whether continued use should stop and whether a qualified replacement or other protocol-permitted option exists. Preserve the original results and relevant evidence.
An apparently reassuring calibration after repair does not prove every historical result was accurate. The responsible team evaluates the likely impact and whether supported correction, repeat measurement or a limitation is appropriate. A repeat months later cannot recreate the original observation. The CRA documents the investigation and verifies implementation of the agreed response without inventing adjusted historical values.
Supplies and expiry
Laboratory kits, collection materials, study devices and product-related supplies should be available in the right type and quantity when needed. Verify kit versions, relevant expiry dates, storage and compatibility. Similar packaging can hide different tubes or components. Staff should not substitute an ordinary clinic supply for a protocol-specific item without appropriate evaluation and authorisation.
Forecast needs from planned visits, expected recruitment, lead times and contingency requirements. A simple inventory can identify units on hand, allocated/used, expired, damaged and awaiting replacement. Keep those states distinguishable. A delivery receipt establishes arrival, not that the shipment is complete, undamaged and suitable for use.
For an illustrative stock example, a site has 12 usable kits, expects 8 scheduled collections before resupply and reserves 2 for permitted repeats. The planned requirement is 10, leaving a margin of 2 kits. If 3 current kits will expire before those visits, usable stock for the plan is only 9, leaving a shortage of 1. These are hypothetical numbers; the point is to consider time and usability rather than total boxes alone.
Configuration and software changes
A study instrument or tablet may receive updates affecting data capture, calculation or transmission. Use controlled change procedures and involve the responsible technical function. Document the version, timing, relevant testing and affected records. Do not disable updates or install a new algorithm independently just to make the next visit possible. Assess both data quality and security considerations.
Participant-provided or home-use equipment also needs appropriate instruction, support, traceability and contingency. Clarify return and data-preservation arrangements before closure. Returning a device should not delete the only source record or leave the participant without required ongoing care support.
Monitoring follow-up
During qualification assess the proposed capability; at initiation verify readiness; during conduct examine ongoing use, maintenance and problems; at close-out confirm suitable disposition and record retention. A failure found late can reveal earlier affected work, so follow the evidence across the lifecycle. Link any corrective action to a real process: ownership of service reminders, supply forecasting, backup verification or operator training. Verify effectiveness through later records rather than closing an action on a promise.
Official sources
Checked October 18, 2026: ICH E6(R3), Principles and Annex 1, ICH E8(R1).
An endpoint instrument is found out of calibration. What should the monitor facilitate?
Ignore it if the instrument looks new.
Identify relevant use and affected data, preserve evidence and obtain responsible technical/clinical impact evaluation.
Assume later repair proves every past value accurate.
Invent corrected historical values.
Sections you finish are checked off in the contents.