https://peertube.dngr.us/videos/watch/b9f9402a-743d-4785-b3d9-ccc7c3ff0ee1 Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Help us preserve, scan and post more rare and endangered films! Join us on Patreon. Visit https://www.patreon.com/PeriscopeFilm Visit our website www.PeriscopeFilm.com This color United States Navy training Film produced by the U.S. Naval Production Center, “Medical Aspects of Diving: Effects of Elevated Partial Pressures of Gases” (1962) is a color training film that illuminates the Navy’s rules for safe diving and why they have been established. Through the use of supervised experiments and animated graphics, the film discusses the impacts of breathing oxygen, nitrogen, and carbon dioxide at elevated partial pressures on the body and how to avoid these adverse physiological effects. Film opens, “unclassified” message, opening credits (0:08). Narration begins; Navy underwater training exercise consisting of one man wearing copper four light, twelve bolt diving helmet (standard industrial deep sea diver outfit) and other safety “spotters” in standard wetsuit with gas tank (0:40). Breathing oxygen in atmospheres with greater pressures than normal, impacts on body: Narcosis, convulsions, unconsciousness, decompression sickness (DCS)/ “the bends” (1:39). Two men assist diver out of suit suffering from DCS, helped into decompression chamber aboard naval vessel (2:40). Simple experiment depicting how much oxygen in air at 1 atmosphere, candle burns in inverted container and water level rises (3:04). Illustrated diagram explaining partial pressures (pressure exerted by an individual gas in a mixture), equation for calculating partial pressures (4:27). Boyle’s Law and calculation of partial pressures (6:28). Another methodology for changing partial pressure of gas (7:00). Supervised experiment, man connected to oxygen machine at partial pressure, physiological reactions; Close-up face of Arnold O. Beckman oxygen analyzer (7:29). Animated explanation as to why physiological disturbances occur, solubility of oxygen in blood (8:26). Explanation continued, cross-sectional anatomy of human body showing circulation of oxygen (9:30). Another supervised experiment, physiological impacts when partial pressure of oxygen higher than normal; Man lies down, restrained, hooked up to oxygen mask; Muscular twitching, convulsions (11:50). Underwater test by Experimental Diving Unit (12:50). Diving candidates undergo experiment in controlled chamber to ensure fitness for role (13:05). Illustrated diagram depicting absolute pressure, oxygen partial pressure at different underwater depths (13:59). Shot of underwater diver experiencing intoxication/ narcosis by nitrogen (14:45). Effects of breathing nitrogen at high partial pressure demonstrated through controlled experiment in recompression chamber (15:08). Special designed equipment to avoid hazards of nitrogen narcosis (15:59). Cross-sectional anatomy of human body showing circulation of nitrogen at normal and increased air pressure (16:54). View as diver ascends to surface, ascent rate determines rate at which nitrogen dissolves in tissues (18:54). Simple experiment exemplifying phenomena: Water poured over glass beads in funnel over beaker with liquid (19:05). Nitrogen bubbles in blood of frog that has been rapidly decompressed (19:54). Illustrated explanation of DCS, nitrogen bubbles in blood stream (20:18). Supervised experiment, impact when exhaled carbon dioxide (CO2) becomes mixed with inhaled air underwater; Subject eventually falls out of chair unconscious (21:06). Illustration explaining partial pressure of CO2 at different absolute pressures (23:29). Footage diver, in Navy standard suit, descends underwater continually increases rate of flow of air (23:52). Diver helps fellow diver out of closed-circuit scuba gear (rebreather) on beach shore; CO2 absorption canister inspected, crystals in canister also inspected to make sure they are correct color (24:21). Review of major points made throughout film, montage clips previously played throughout film (24:58). Closing credits (27:28). Film ends (27:35). Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have endangered films you'd like to have scanned, or wish to donate celluloid to Periscope Film so that we can share them with the world, we'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=kLrIAsLDhTI Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Sat, 13 Jun 2026 13:23:45 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/b9f9402a-743d-4785-b3d9-ccc7c3ff0ee1 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.