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45 Cards in this Set
- Front
- Back
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Explain In-water decompression on air and oxygen. |
- 30 - 20 fsw stops on O2 - air breaks every :30 - if the final O2 period is 35 minuets or less, a final air break at the 30 minute mark is not required. |
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Explain Surface Decompression on Oxygen (SurDO2). |
- Surface after 40 fsw stop @ 40 fpm. - :05 surface interval from 40 fsw to 50' feet in the chamber |
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Explain Surface Decompression from 30 and 20 fsw. |
- Diving supervisor can initiate surface decompression at any point during in-water decompression at 30 or 20 fsw. - Before shift to 02, use O2 periods as perscribed - After shift, calculate new O2 periods required - Remaining O2 time X 1.1 round minutes up to next half period |
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Explain if SurD is elected while decompressing on air at 30 fsw. |
-@ 30 fsw - Compute Air/O2 Trading Ratio (Air time @ 30 fsw divided by O2 time at 30 fsw) - Divide remaining time by ratio - Add to 20 fsw O2 stop time- - X 1.1 round minutes up to the next half period |
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Explain if Sur D was elected while decompressing at 20 fsw. |
-Compute Air/O2 Trading Ratio - Air time @ 20fsw divided by O2 time @ 20 fsw - Divide remaining time by ratio - X 1.1 round minutes up to the next half period |
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Delays in arriving at the first decompression stop deeper than 50 fsw. |
- Round up delay to next whole minute - Recompute Table and schedule - Perform and deeper stops missed at current depth. |
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Delays in arriving at the first decompression stop shallower than 50fsw. |
- Round up delay to next whole minute - Add to 1st decompression stop |
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Delays in leaving a stop or between decompression stops deeper than 50fsw. |
-Round up delay to the next whole minute -Recompute table and schedule -Pick up new schedule at current depth |
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Delays in leaving a stop or between decompression stops shallower than 50 fsw. |
Disregard. |
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Delay leaving or between 30, 20 fsw stop. |
-Delay counts towards next decompression stop. - Shift divers to air at :30 min O2 time - Resume decompression at the end of delay. |
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Delay leaving 20fsw to the surface. |
-Shift divers to air at :30 min O2 time - Resume Decompression at the end of delay - Disregard delay time. |
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Loss of O2 in water before the shift |
-Continue breathing air; consider any time spent on air as dead time -If the problem can be corrected , vent both divers and resume decompression. - If the problem can't be corrected , initiate surface decompression. - If there is no chamber, continue decompression in the water. |
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Loss of O2 in the water after the shift @ 30fsw |
-Shift the diver back to air. -If the problem can be corrected, ventilate divers and resume decompression. -If the problem can't be corrected initiate surface decompression. -Multiply the remaining O2 time by 1.1, round up to the next 1/2 period. -If the there is no chamber, multiply remaining 30 fsw stop time by the air/O2 ratio. - Take the full 20fsw air stop as prescribed in the air decompression table. |
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Loss of O2 in the water after the shift @ 20fsw |
- Shift the diver back to air. - If the problem can be corrected, ventilate divers and resume decompression. - If the problem can't be corrected, initiate surface decompression. -Multiply the remaining O2 time by 1.1 and round up to next 1/2 period. -If there is no chamber, multiply the remaining 20fsw stop time by the air/O2 ratio. |
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In the chamber you have a temporary loss of O2 |
-Continue breathing air; consider and time spent on air as dead time. |
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In the chamber you have a permanent loss of O2 but 50/50 is available. |
-Multiply remaining O2 time by 2 -Air breaks are not required -Consider any time spent on air as dead time -Allocate: 10% @ 40', 20% @ 30', 70% @ 20' |
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In the chamber you have a permanent loss of O2 you only have air available at 50fsw |
-Multiply remaining O2 time by Air/O2 ratio @ 30 and 20fsw stop -Allocate 10% @ 40', 20% @ 30',70% @ 20' |
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In the chamber you have a permanent loss of O2 you only have air available at 30fsw |
-Multiply remaining O2 time by Air/O2 ratio @ 30 and 20 stop. - Allocate: 30% @ 30', 70% @ 20' |
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CNS O2 toxicity in the water non-convulsive. |
-Initiate surface decompression. -Shift the console to air during travel to the surface. -Multiply remaning O2 time by 1.1, round up to next 1/2 period. |
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CNS O2 toxicity in the water at 30fsw non-convulsive and no chamber available |
- Up 10fsw, Shift the console to air during travel to 20fsw. - Ventilate divers; affected diver first. -multiply remaining 30fsw stop time by Air/O2 ratio, add to 20 fsw stop time. |
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CNS O2 toxicity in the water at 20fsw non-convulsive and no chamber available. |
-Shift console to air. -Ventilate divers, affected diver first. -Multiply remaining 20fsw stop time by Air/O2 ratio, perform on air. |
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CNS O2 toxicity in the water convulsive and chamber is available |
-Shift both divers to air. -Ventilate unaffected diver and ventilate then stricken diver. -Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided - Surface decompress maintaining airway - Multiply remaining O2 time by 1.1, round up to next 1/2 period. |
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CNS O2 toxicity in the water convulsive at 30 fsw and no chamber is available. |
-Shift both divers to air. -Ventilate unaffected diver and then ventilate the stricken diver. -Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided. - Continue decompression in the water - Multiply the remaining 30fsw stop time by Air/O2 ratio. -Take the full 20fsw air stop as prescribed in the air decompression table. |
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CNS O2 toxicity in the water convulsive at 20fsw and no chamber is available. |
-Shift both diver to air. -Ventilate unaffected diver and then ventilate the stricken diver. -Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided. -Continue decompression on air in the water -Multiply remaining 20 fsw stop time by Air/O2 ratio. |
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CNS O2 toxicity in the water convulsive and cannot ascertain breathing. |
-Shift both divers to air. -Ventilated unaffected diver and then ventilate the stricken diver. -Hold the divers at depth until the tonic-clonic phase of the convulsion has subsided. -Surface the affected diver w/ standby diver maintaining an open airway. - On the surface, the affected diver should receive any necessary airway support and be immediately recompressed and treated for arterial gas embolism. |
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CNS O2 toxicity in the chamber non-convulsive |
-Off O2 -:15 after symptoms subside, resume @ point of interruption |
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CNS O2 Toxicity in the chamber convulsive or second symptom |
-Off O2 -After symptoms subside, up 10' @ 1fpm -Resume @ point of interruption |
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CNS O2 toxicity in the chamber second symptom after convulsion or 3rd symptom at 40fsw |
-Off O2 -Multiply remaining O2 time by air/O2 ratio @ 30 and 20 fsw stop -Allocate 10% @ 40', 20% @ 30', 70% @ 20' |
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CNS O2 toxcity in the chamber second symptom after convulsion or 3rd symptom at 30fsw |
-Off O2 -Multiply remaining O2 time by air/O2 ratio @ 30 and 20 fsw stop -Allocate 30% @ 30', 70% @ 20' |
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Surface interval from :5 to :7 min |
Add 1/2 O2 period (:15) at 50' in the chamber |
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Surface interval greater than :7 min |
2 or fewer O2 periods required -compress to 60 fsw -TT5 2 or more O2 periods required -Compress to 60 fsw -TT6 |
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Cannot clear in the chamber to reach 50 fsw, 20 fsw is the deepest in water stop. |
-Begin O2 breathing @ deepest depth attainable -Compress to 20fsw -Double schedule O2 periods -:60 on O2 :15 air break |
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Cannot clear in the chamber to reach 50 fsw, 30 fsw is the deepest in water stop. |
-Begin O2 breathing @ deepest depth attainable -Compress to 30 fsw -Double scheduled O2 periods -:60 on O2 :15 air break |
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Type I Decompression sickness during surface interval during SurD symptoms resolved during :15 at 50' chamber stop or surface interval less than :05
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-Add :15 to 50' O2 time |
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Type I DCS during surface interval during a surface interval. Symptoms unresolved during :15 at 50' chamber stop or surface interval greater than :5 |
2 or fewer O2 periods required -Compress to 60 fsw -TT5 (minimum) 2 or more O2 periods required -Compress to 60 fsw -TT6 (minimum) |
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Type II DCS during surface interval during a surD |
-Compress to 60 fsw -TT6 (minimum) |
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DCS in the water and diver remains in the water you only have air available. |
-Launch standby -Descend 10 fsw, if no significant relief, descend 10 more feet. -Remain at treatment depth for at least 30min -Decompress 1.5 times all subsequent stops -If no stops scheduled, 1.5 times first stop time @ 10' intervals. -Residual symptoms: TT6 (minimum) -No Residual symptoms: TT5 |
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DCS in the water and diver remains in the water. You have O2 available. |
-Launch standby -Descend 10fsw, if no significant relief, descend 10 more feet. -Remain at treatment depth for at least 30 min. -Decompress 1.5 times all subsequent stops -If no stops scheduled, 1.5 times first stop time @ 10' intervals -Begin O2 breathing @ 40 few -Continue on O2 for 1.5 times the stop time @ 40', 30', 20' to the surface. -Residual symptoms: TT6 (minimum) -No Residual symptoms: TT5 |
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Type I DCS in the water , diver leaving the water. |
-Surface and recompress IMMEDIATELY! -Treat as Type II |
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Type II DCS in the water, diver leaving the water. |
-Surface and recompress IMMEDIATLY! -Treat as appropriately. |
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Asymptomatic omitted decompression, no stops missed. |
-Observe on surface 1 hour -Conduct Neuro exams throughout and at the end of hour. |
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Asymptomatic omitted decompression, missed 20 or 30 fsw stop. Surface interval less than 1 min. |
-Return to stop, add 1 min to stop time. |
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Asymptomatic omitted decompression, missed 20 or 30 fsw stop. Surface interval between :1-:7 min. |
Chamber available -Sur D -If greater than :5 but no more than :7 , add :15 to 50' O2 time. No Chamber -Return to depth of stop -1.5 times 30' and 20' stop times |
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Asymptomatic omitted decompression, missed 20 or 30 few stop. Surface interval greater than :7 min |
Chamber available 2 or fewer O2 periods -Compress to 60' start TT5 2 or more O2 periods required -Compress to 60' start TT6 No Chamber -Return to depth of stop -1.5 times 30' and 20' O2 stop times. |
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Asymptomatic omitted decompression, missed stop deeper than 30. |
Chamber available -TT6 -TT6A greater than 50fsw omitted No chamber -Return to depth of stop -Follow regular schedule to 30', shift to O2 if possible -1.5 times 30' and 20' few stop times |
