Overview
IEC TS 62462:2017 - “Ultrasonics - Output test - Guidance for the maintenance of ultrasound physiotherapy systems” - provides standardized methods to check and document the performance of therapeutic ultrasound equipment during its lifetime. The Technical Specification defines simple, repeatable checks (acceptance, weekly and annual) to verify safe and effective acoustic output for typical physiotherapy ultrasound systems operating in the 0.5 MHz to 5 MHz range (long-wave systems 30 kHz–0.5 MHz are excluded). The document also includes tester guidance and example test reports to support routine maintenance and quality assurance.
Key Topics
- Testing regimes: Defined acceptance testing, weekly testing (qualitative/relative), and annual testing (quantitative + qualitative).
- Performance checks: Visual inspection, manufacturer’s statements, ultrasonic output tests, beam uniformity, effective radiating area (ERA), pulse duty-factor accuracy and timer accuracy, with formal recording of results.
- Measurement methods: Guidance on the use of ultrasound power meters, environmental controls (room and water temperature), and measurement techniques.
- Quantitative techniques: Informative annexes describe methods using temperature rise (Annex C), calorimetry (Annex D), and a novel qualitative method using thermochromic absorbers to assess changes in ERA (Annex E).
- Test documentation: Example weekly and annual test reports (Annex F and G) and rationale for testing (Annex A).
- Intended accuracy and equipment considerations: Annex B gives recommended power meter specifications and practical advice for testers.
Applications
IEC TS 62462 is practical for professionals and organizations involved in maintenance, safety, and quality of ultrasound physiotherapy devices:
- Primary users: Physiotherapists, chiropractors, osteopaths, beauty and sports therapists.
- Technical users: Biomedical engineers, medical physicists, medical device service agents, commercial testers, test houses and manufacturers.
- Use cases: Routine clinic checks (weekly), equipment acceptance at installation, annual calibration/verification, performance troubleshooting, and documentation for regulatory or audit purposes.
Related Standards
- IEC TS 62462 references medical electrical equipment standards (see normative references) and is complementary to device safety and performance standards such as IEC 60601-2-5 (medical electrical equipment - specific requirements for ultrasonic therapy equipment). Users should consult these related standards for full conformity and safety context.
This specification supports safe, consistent maintenance and output verification of therapeutic ultrasound devices through clear procedures, practical measurement guidance, and reproducible reporting.