Abstract
A case of 32-year-old man was reported who showed prolonged hepatic and renal failure treated by hyperbaric oxygen therapy（OHP）.
These disorders followed severe hemorrhagic shock due to contusions of left-side chest and upper arm. As his progress was poor, so, three months after the accident, he received OHP（2 ATA for two hours with pure oxygen）for ten days continuously.
After the beginnig of OHP, hepatic（GOT, PT, T-Bil, P-Ammonia）and renal（sCr, BUN, Ccr, FENa）functions improved significantly. Within the same day, FENa, u-BMG, TmG, PT and p-Ammonia during OHP were improved compared with those data before OHP.
This result suggests OHP is effective for hepatic and renal failure following hemorrhagic shock not only in acute but also in chronic phases.
