This was one of the goals of the anonymous survey. In addition, DAN was trying to learn how often DCI relapses occur after recompression therapy; and what effect flying after recompression had on DCI relapse.
Currently, there is very little data to answer the question of how long to wait but some recommendations range from the most common of 72 hours to 4-6 weeks, which is the longest.
A review of the DAN DCI data from 1993-1995 where 151 cases were treated in Cozumel or Cayman and 126 were successfully followed up with, showed that 95 divers had complete relief after treatment and 9 (10%) had a relapse of symptoms with flight. 31 divers finished treatment with residual symptoms and 22 (71%) had a relapse with flight.
ResultsSurveys were sent to approximately 200 chambers in October of 2003 and the diver survey was posted on the DAN website in November 2003.
Chamber Survey Results
Of 200 chambers, 17 replied with the following information:
Diver Survey Results
310 divers responded with the following information:
No significant difference between the 2 groups in terms of relapse rate.
Estimated relapse rates after recompression:
For a list of publications related to this study, click here.