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YY/T 1953-2026Biological evaluation of nanomaterial medical devices - Test for antimicrobial performance (English PDF)

纳米医疗器械生物学评价 抗菌性能试验

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Issued by

NMPA

Level / Type

Industry · Recommended

Issue date

March 9, 2026

Implementation date

March 1, 2027

Scope

YY/T 1953-2026 is the English-translated version of 纳米医疗器械生物学评价 抗菌性能试验.

YY/T 1953-2026 is the Chinese standard "Biological evaluation of nanomaterial medical devices - Test for antimicrobial performance".

Its scope clause reads: This document describes the testing methods for the antibacterial properties of medical devices using nanomaterials, including the agar plate diffusion method, absorption method, and vibration method.

Swaying method. This document applies to the evaluation of the antibacterial properties of medical devices that utilize nanomaterials. Note 1.Currently, this mainly includes medical devices containing nanomaterials that come into contact with wounds on the body surface.

Note 2.Currently, this document mainly provides test methods for antibacterial performance. Test methods for bactericidal performance will be considered for inclusion in this document once the technology matures. Its clauses include terms and definitions.

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Document preview — YY/T 1953-2026

National Standard of the People's Republic of China

ICS
11.040.30
Classification
C30

Issued by: National Medical Products Administration

Contents

  • Preface
  • Introduction
  • 1.Scope
  • 2 Normative References
  • 3.Terms and Definitions
  • 4.Main equipment, experimental materials, reagents, and their preparation
  • 5.Test methods for evaluating antibacterial properties
  • 6 Test Report
  • Appendix A (Normative) Plate Counting Method
  • References

1 Scope

This document describes the testing methods for the antibacterial properties of medical devices using nanomaterials, including the agar plate diffusion method, absorption method, and vibration method.

Swaying method.

This document applies to the evaluation of the antibacterial properties of medical devices that utilize nanomaterials.

Note 1.Currently, this mainly includes medical devices containing nanomaterials that come into contact with wounds on the body surface.

Note 2.Currently, this document mainly provides test methods for antibacterial performance. Test methods for bactericidal performance will be considered for inclusion in this document once the technology matures.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

YY/T 1477.1 Standard test models for evaluating the performance of contact wound dressings – Part 1.Evaluation of antimicrobial activity in vitro for wounds

Model

Pharmacopoeia of the People's Republic of China (2020 Edition)

Disinfection Technical Specifications (2002 Edition)

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 nanomaterials

Materials whose external dimension, internal or surface structure is in the size range of 1nm to 100nm.

[Source. GB/T 30544.4-2019, 2.3, with modifications]

3.2 antimicrobial

The process of killing bacteria and fungi or inhibiting their growth, reproduction and activity using chemical or physical methods.

[Source. Disinfection Technical Specifications (2002 Edition), 1.3.30, with modifications]

3.3 Colony forming unit (CFU)

In live bacteria culture counting, colonies are formed by the growth and reproduction of single bacteria or multiple bacteria aggregated together on a solid culture medium.

Note. It is used to express the number of live bacteria.

3.4 test sample

The samples prepared from medical device products using nanomaterials contain a corresponding proportion of nanomaterial components.

3.5 control sample

Except for the absence of nanomaterial components, it is consistent with the test sample (3.4).

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 14 pages — is available in the English PDF.

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