A British physician, Nahaniel Henshaw, proposed what would've been the 1st hyperbaric chamber for health-related treatment of people in 1662. The steel container was to happen to be pressurised with air, which at enough time was not still recognised to comprise oxygen, later found out by Carl Wilhelm Scheele close https://how-much-is-a-hyperbaric62738.blogminds.com/the-oxygen-chamber-stoke-on-trent-diaries-33385112