BRW
Contributor
SB Folks,
Expect many of you on Mike's Dr Deco Site interested,
so am happy to post upcoming USN/UHMS/DAN/NAUI/PADI
Wkshp on Lists. Here it is -- News Release and Schedule.
News Release:
Theoretical and practical solutions as to how to ascend or decompress after diving have been considered since Haldane some 100 years ago, yet decompression sickness (DCS) still occurs. The traditional Haldanian approach to planning decompression has been to limit supersaturation (the difference between tissue inert gas tension and ambient pressure) according to empirically derived rules that purportedly maximize gradients for inert gas washout and therefore provide a low risk of DCS. The use of Doppler to monitor the central venous circulation, however, shows this approach still frequently results in bubble formation Other more recent decompression theories have relied on so called bubble models which focus on prevention of such bubble formation. To do this the algorithms limit supersaturation more aggressively and typically result in the imposition of deeper decompression stops. These have been used quite successfully for many years by technical divers for deep diving. In recent years, the utilization of a deep stop by recreational scuba divers at depths less than 130 fsw (41 m) also has been proposed. This is now appearing in tec and rec dive computers using bubble models such as Varying Permeability or the Reduced Gradient Bubble Model or the Half the Depth Model. Some training agencies have also incorporated deep stops into their training regimens. However, there is debate as to when to stop, for how long and how often in regard to whether such a deep stop does limit bubble growth or ameliorate the risk of DCS. This workshop has brought together the most active international individuals with practical human data, animal research and theoretical concepts to help clarify the role of deep stops in contemporary recreational scuba and technical diving, and to point out what we know as well as indicate future research needs.
Note: Wkshp immediately prior to the Undersea and Hyperbaric Medical Society Annual Scientific Meeting 26-28 June 2008.
Financial Support: UHMS, ONR, DAN, NAUI and PADI
Program:
Co-Chairs: P. Bennett, B. Wienke, S. Mitchell
Day 1, 24 June 2008
07:30 Registration
08:30 Introduction to the Program P.B. Bennett
08:30 Early Deep Stop Observations T. Neuman
09:00 LANL Deep Stop Data Bank And Dual Phase
Bubble Model For Profile Analysis And Risk B. Wienke
09:30 Discussion
10:00 Technical Diving Overview S. Mitchell
10:30 Coffee Break
Technical Diving Use of the Deep Stop
10:45 NAUI T. OLeary
11:00 IANTD T. Mount
11:15 GUE J. Jablonski
11:30 ANDI E. Betts
11:45 PADI D. Richardson
12:00 LANL B. Kashiwa
12:15 Discussion
13:00 Lunch
14:00 U.S. Navy Deep Stop Research W. Gerth
14:30 Discussion
15:00 Coffee Break
15:15 Deep Stop at 50 or 60 m J. Blatteau
15:45 Discussion
16:45 Close Session
19:00 Symposium Dinner Film Presentation/Speaker
WKPP Deep Diving and Exploration J. Jablonski
Day 2, 25 June 2008
08:00 Probability Theories and Deep Stop R. Vann
08:30 Discussion
09:00 Bubble Detection and DCS Relevance N. Pollock
09:30 Discussion
10:00 Coffee Break
10:15 Copernicus and the Deep Stop A. Brubakk
10:45 Discussion
11:15 IDAN Deep Stop Research P. Bennett
11:45 Discussion
12:15 Lunch
13:15 Recent IDAN Deep Stop Research A. Marroni
13:45 Discussion
14:15 Reverse Profile, Rat Spinal Cord Model F. Cronje
14:45 Discussion
15:15 Coffee Break
15:30 General Discussion, Future Research Faculty
16:30 Close Session
Best, and hope to see you in Salt Lake City,
Bruce Wienke
Los Alamos National Laboratory
C & C Dive Team Ldr
Program Manager
Applied And Computational Physics/X-Division
Expect many of you on Mike's Dr Deco Site interested,
so am happy to post upcoming USN/UHMS/DAN/NAUI/PADI
Wkshp on Lists. Here it is -- News Release and Schedule.
News Release:
Theoretical and practical solutions as to how to ascend or decompress after diving have been considered since Haldane some 100 years ago, yet decompression sickness (DCS) still occurs. The traditional Haldanian approach to planning decompression has been to limit supersaturation (the difference between tissue inert gas tension and ambient pressure) according to empirically derived rules that purportedly maximize gradients for inert gas washout and therefore provide a low risk of DCS. The use of Doppler to monitor the central venous circulation, however, shows this approach still frequently results in bubble formation Other more recent decompression theories have relied on so called bubble models which focus on prevention of such bubble formation. To do this the algorithms limit supersaturation more aggressively and typically result in the imposition of deeper decompression stops. These have been used quite successfully for many years by technical divers for deep diving. In recent years, the utilization of a deep stop by recreational scuba divers at depths less than 130 fsw (41 m) also has been proposed. This is now appearing in tec and rec dive computers using bubble models such as Varying Permeability or the Reduced Gradient Bubble Model or the Half the Depth Model. Some training agencies have also incorporated deep stops into their training regimens. However, there is debate as to when to stop, for how long and how often in regard to whether such a deep stop does limit bubble growth or ameliorate the risk of DCS. This workshop has brought together the most active international individuals with practical human data, animal research and theoretical concepts to help clarify the role of deep stops in contemporary recreational scuba and technical diving, and to point out what we know as well as indicate future research needs.
Note: Wkshp immediately prior to the Undersea and Hyperbaric Medical Society Annual Scientific Meeting 26-28 June 2008.
Financial Support: UHMS, ONR, DAN, NAUI and PADI
Program:
Co-Chairs: P. Bennett, B. Wienke, S. Mitchell
Day 1, 24 June 2008
07:30 Registration
08:30 Introduction to the Program P.B. Bennett
08:30 Early Deep Stop Observations T. Neuman
09:00 LANL Deep Stop Data Bank And Dual Phase
Bubble Model For Profile Analysis And Risk B. Wienke
09:30 Discussion
10:00 Technical Diving Overview S. Mitchell
10:30 Coffee Break
Technical Diving Use of the Deep Stop
10:45 NAUI T. OLeary
11:00 IANTD T. Mount
11:15 GUE J. Jablonski
11:30 ANDI E. Betts
11:45 PADI D. Richardson
12:00 LANL B. Kashiwa
12:15 Discussion
13:00 Lunch
14:00 U.S. Navy Deep Stop Research W. Gerth
14:30 Discussion
15:00 Coffee Break
15:15 Deep Stop at 50 or 60 m J. Blatteau
15:45 Discussion
16:45 Close Session
19:00 Symposium Dinner Film Presentation/Speaker
WKPP Deep Diving and Exploration J. Jablonski
Day 2, 25 June 2008
08:00 Probability Theories and Deep Stop R. Vann
08:30 Discussion
09:00 Bubble Detection and DCS Relevance N. Pollock
09:30 Discussion
10:00 Coffee Break
10:15 Copernicus and the Deep Stop A. Brubakk
10:45 Discussion
11:15 IDAN Deep Stop Research P. Bennett
11:45 Discussion
12:15 Lunch
13:15 Recent IDAN Deep Stop Research A. Marroni
13:45 Discussion
14:15 Reverse Profile, Rat Spinal Cord Model F. Cronje
14:45 Discussion
15:15 Coffee Break
15:30 General Discussion, Future Research Faculty
16:30 Close Session
Best, and hope to see you in Salt Lake City,
Bruce Wienke
Los Alamos National Laboratory
C & C Dive Team Ldr
Program Manager
Applied And Computational Physics/X-Division
