DECOMPRESSION PROCEDURES FOR CAISSON WORK - A REVIEW OF VARIOUS TECHNIQUES

Authors
  1. Koch, G.H.
  2. Nishi, R.Y.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
Many different procedures are in effect for decompression after exposure to pressure in caisson work although they differ little in their basic concepts. The main principle is to prevent decompression sickness and aseptic bone necrosis in workers while affording rapid (and therefore economical) decompressions. An analysis was carried out comparing the Ontario, Washington State, and British "Blackpool" caisson decompression procedures, and the U.S. Navy and Royal Navy diving decompression procedures with the DCIEM Kidd-Stubbs decompression model. The conclusions reached are that the Ontario procedure is safe provided the second shift is eliminated for exposures to pressures greater than 14 psig, and that the Washington State and British "Blackpool" procedures become increasingly unsafe as the exposures become longer over all the pressure ranges up to 50 psig. It is noted that these "unsafe" exposures have not generally been used in practice. TRUNCATED
Report Number
DCIEM-R-905 —
Date of publication
15 Nov 1972
Number of Pages
26
DSTKIM No
73-03970
CANDIS No
19205
Format(s):
Document Image stored on Optical Disk;Originator's fiche received by DSIS

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