NCCE key terms

Any instrument, apparatus, implement, machine, implant, reagent, or software intended by its maker for diagnosis, prevention, monitoring, treatment, or alleviation of disease or injury, whose primary action is not achieved by pharmacological or immunological means.

The regulatory grouping of devices by hazard and intended use, typically into low, moderate, and high classes, which determines the controls, review pathway, and documentation required before and after market entry.

A legally marketed device to which a new device is compared to show substantial equivalence in intended use and safety and performance, forming the basis of many premarket notifications.

The ongoing, structured collection and analysis of device performance and safety data after sale, including complaint review and adverse event reporting, used to detect problems that premarket testing could not reveal.

A formal submission to a regulator describing a device-related death, serious injury, or malfunction, filed within defined time limits by manufacturers, importers, or user facilities.

A manufacturer's or regulator's action to remove or correct a device already in distribution because it violates regulations or presents a health hazard; classified by severity and requiring tracking of affected units.

A documented quality system process that investigates root causes of existing nonconformities and potential failures, then implements and verifies changes so the problem does not recur or occur.

The organizational structure, documented procedures, and resources used to direct and control quality across a device's life cycle, covering design, purchasing, production, servicing, and complaint handling.

A compilation of records for a production batch or unit showing it was manufactured in accordance with the device master record, including acceptance results, dates, and quantities released.

Verification performed before a new or repaired device is placed into clinical use, confirming that performance, safety, and alarm functions meet specifications and documented baseline values.

Scheduled or post-repair testing that compares a device's measured output against manufacturer specifications or a stored baseline to confirm it still functions within tolerance.

Adjusting or confirming an instrument's measurement accuracy by comparison with a reference standard of known, traceable value, with results and tolerances recorded.

The documented, unbroken chain of calibrations linking a working test instrument to a national or international reference standard, with stated uncertainty at each step.

Planned, scheduled servicing such as cleaning, lubrication, inspection, and parts replacement intended to keep equipment reliable and prevent failure, performed per manufacturer recommendations and risk-based intervals.

A controlled record authorizing and documenting a maintenance, inspection, or repair task, capturing the asset, reported problem, actions taken, parts used, labor, and completion sign-off.

Software that stores the equipment inventory and schedules, tracks, and reports maintenance work orders, parts, costs, and compliance status for a healthcare technology inventory.

A maintained, uniquely identified list of devices with location, manufacturer, model, serial number, acquisition data, and maintenance history that underpins planning, budgeting, and compliance reporting.

The proportion of scheduled time that a device is available and functioning for clinical use; a key performance measure for a clinical engineering department and for vendor service agreements.

A structured evaluation of a medical technology's safety, clinical effectiveness, cost, and organizational impact, used to inform purchase, replacement, and adoption decisions.

The full lifetime cost of a device, including purchase, installation, consumables, service contracts, training, utilities, downtime, and disposal, used to compare purchase options fairly.

The multi-year process of forecasting clinical need, prioritizing purchases, budgeting funds, and scheduling replacement or disposal of major devices within a facility's strategic and financial plans.

A systematic team method for tracing an adverse event or failure back to underlying process and system causes rather than individual blame, producing recommendations that reduce recurrence risk.

A proactive team technique that lists how a process or device could fail, rates each failure's severity, likelihood, and detectability, and prioritizes actions to reduce the highest-risk modes.

An unexpected occurrence involving death or serious physical or psychological harm, or the risk of it, that triggers immediate investigation and response under accreditation requirements.

Measurement of a device's protective earth continuity, chassis and patient-lead leakage currents, and insulation resistance under normal and single-fault conditions to confirm it is safe to use.

Small current that flows through stray capacitance, insulation, or a patient connection rather than the intended circuit; measured against limits that differ for chassis, earth, and patient-applied paths.

The portion of a device designed to make physical contact with the patient to perform its function; its classification (type B, BF, CF) sets the permitted patient leakage and the degree of isolation required.

Electric current passing through the body surface and bulk tissues at levels that can cause pain, burns, muscle contraction, or cardiac arrest; typical thresholds are in the milliampere range.

Very small current, on the order of tens of microamperes, delivered directly to heart muscle through an intracardiac conductor such as a pacing lead or catheter, capable of inducing ventricular fibrillation.

A protective device that compares current in the live and neutral conductors and opens the circuit when a small imbalance indicates leakage to ground, limiting shock exposure.

An electrical distribution arrangement in which the supply is separated from earth, limiting fault current and reducing the risk of a single fault causing a shock in wet or critical-care areas.

The portion of a facility's wiring designed to supply selected life-safety, critical, and equipment loads during loss of normal power, typically through generators, transfer switches, and dedicated branch circuits.

A battery-backed power source that supplies connected equipment without interruption during a brief outage or voltage disturbance and bridges the gap until generators start.

The ability of a device to operate without unacceptable degradation when exposed to electromagnetic fields and not to emit disturbances that interfere with other equipment nearby.

Disruption of device function caused by external electromagnetic energy, such as radio transmitters or other equipment, producing noise, false readings, or erratic operation.

Desensitization of staff to the high volume of device alarms, leading to delayed or missed responses; mitigated through alarm parameter customization, signal design, and policy.

Connecting devices such as monitors and pumps to information systems so data flow automatically into the electronic record, reducing transcription errors while requiring network and cybersecurity controls.

The ability of devices and information systems from different vendors to exchange and use data correctly, typically through agreed messaging standards and profiles.

Dividing a network into isolated zones with controlled traffic between them, commonly used to keep medical devices separated from general business systems and limit the spread of cyber threats.

A patient's voluntary agreement to a procedure or device use after receiving understandable information about purpose, benefits, alternatives, and risks, documented before the intervention.

The professional obligation to inform a patient or responsible party of a hazard, device problem, or risk discovered during care, even when disclosure may be uncomfortable.

A situation where a personal financial or other interest could improperly influence professional judgment, such as vendor gifts affecting equipment selection; it must be disclosed and managed.