ASTM F1671 Standard Test Method for Resistance of Materials Used in Protective Clothing to Penetration by Blood-Borne Pathogens

ASTM F1671 Introduction

Professional protective clothing is frequently used by healthcare workers, first responders, and lab staff to minimize the risk of exposure to blood-borne viruses (Hepatitis B, Hepatitis C, and HIV). The ASTM F1671 standard test method has been designed to simulate continuous liquid contact of a viral suspension with a material specimen and to determine whether the material permits penetration of a surrogate virus, the bacteriophage Phi-X174, under pressure. The test fails to encompass all exposure modes, yet it attempts to provide a reliable laboratory standard for the viral penetration resistance of materials or seams of protective clothing. The technique is applied to manufactured products or known material structures, and it is normally employed after initial examination by synthetic blood penetration examination. It is intended to be used in the process of selecting, comparing, and quality-checking barrier material rather than conducting a full evaluation of garment performance.

ASTM F1671 Test Method

ASTM F1671 Equipment and Sample Preparation

ASTM F1671 Test Results and Interpretation

The outcome is reported as either pass or fail, where a pass means a non-detectable bacteriophage on the downstream side and no observable liquid penetration under the conditions of the test. A fail represents either visual liquid or viral detection (without visible liquid). Since this test is binary, and the conditions of the challenge are underdetermined, one should be careful before applying the results to the real world; the materials can exhibit different functions under different pressures, contact times, or fluids.

ASTM F1671 Related Articles

Other related articles are ASTM F1670, which assesses the resistance of materials to penetration of synthetic blood under pressure, ASTM F903, which encompasses liquid penetration testing in protective clothing materials, and ASTM F2407, which specifies performance requirements of surgical gowns. The other applicable article is ASTM F3352, which covers standard specifications of isolation gowns worn in healthcare facilities.

Materials Commonly Tested with ASTM F1671 

This standard applies to fabric, films, and laminate materials to be used as protection garments, aprons, covers, and hoods in health care facilities and laboratories, particularly those purporting high-barrier viral protection.

Applications of ASTM F1671 in Industry

ASTM F1671 is employed in the qualification of gown and coverall material to be employed as high-risk material of exposure to blood and body fluids in medical protective clothing manufacturing. It is also applied in regulatory submissions of PPE under medical device classification and emergency responder garments, which need certification of a viral barrier.

Safety and Best Practices in ASTM F1671 

Since a live bacteriophage is utilized as a challenge agent, test laboratories need to implement biosafety measures that are suitable for viral assays, maintain controls in their microbes, ensure that their specimens are cleaned to eliminate confounding effects, and ensure that test cells are not leaking into cross-contaminated tubes. The state of pre-conditioning and seam integrity should also be regulated in order to prevent null test outcomes.

Importance of ASTM F1671 

ASTM F1671 offers a standardized, biologically-relevant assay of viral penetration resistance of protective clothing materials, thus facilitating the selection of material, quality assurance, and regulatory compliance of clothing used to protect against blood-borne pathogens.