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PVHO-1 and mHBOT Investigation Hub

Direct answer: The Council is investigating what engineering evidence supports the 2 PSI threshold, what risks it was intended to mitigate, and whether a proportionate, risk-based framework can be documented for contemporary mHBOT equipment.

This hub links source-labeled articles, a historical timeline, evidence records, open technical questions, and a public request for supporting documentation. It does not presume that PVHO-1 is wrong or make unsupported claims about standards organizations or regulators.

Editorial disclosure: Educational information only; not legal, medical, regulatory, or engineering advice. Published with the Standards Knowledge Center; last reviewed 2026-08-20.

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