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Tables for:
Decompression Illness in Sports Divers: Part I

[Medscape Orthopaedics & Sports Medicine eJournal 1(5), 1997. © 1997 Medscape Portals, Inc]


Table I. Short Form of the DCIEM Tables (front)



Table II. NAUI Dive Tables



Table III. NAUI Dive Table 1



Table IV. NAUI Dive Table 2



Table V. NAUI Dive Table 3



Table VI. US Navy Treatment Table 6: Oxygen Treatment of Type II Decompression Sickness*


Depth
(feet)
Time
(minutes)
Breathing
Media¥
Total
Elapsed
Time (hr:min)
6020O2§0:20
605Air0:25
6020O20:45
605Air0:50
6020O21:10
605Air1:15
60 to 3030O21:45
3015Air2:00
3060O23:00
3015Air3:15
3060O24:15
30 to 030O24:45

*Treatment of Type II or Type I decompression sickness when symptoms are not relieved within 10 minutes at 60 feet.
Descent rate--25 ft/min. Ascent rate--1 ft/min. Do not compensate for slower ascent rates. Compensate for faster rates by halting the ascent.
Time at 60 feet begins on arrival at 60 feet.
§If oxygen must be interrupted because of adverse reaction, allow 15 minutes after the reaction has entirely subsided and resume schedule at point of interruption.
¥Caregiver breathes air throughout unless he has had a hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.
Extensions to Table 6: Table 6 can be lengthened up to 2 additional 25 minute oxygen breathing periods at 60 feet (20 minutes on oxygen and 5 minutes on air) or up to 2 additional 75 minute oxygen breathing periods at 30 feet (15 minutes on air and 60 minutes on oxygen) or both. If Table 6 is extended only once at either 60 or 30 feet, the tender breathes oxygen during the ascent from 30 feet to the surface. If more than one extension is done, the caregiver begins oxygen breathing for the last hour at 30 feet during ascent to the surface.
Adapted from the US Navy Diving Manual.


Table VII. US Navy Treatment Table 6A - Initial Air and Oxygen Treatment of Arterial Gas Embolism*


Depth
(feet)
Time
(minutes)
Breathing
Media¥
Elapsed
Time
(hrs:min)
16530#air0:30
165 to 604air0:34
6020O2§0:54
605air0:59
6020O21:19
605air1:29
6020O21:44
605air1:49
3015air3:49
3060O24:49
60 to 3030O22:19
3015air2:34
3060O23:34
30 to 030O25:19

*Treatment of arterial gas embolism where complete relief obtained within 30 min at 165 feet. Use also when unable to determine whether symptoms are caused by gas embolism or severe decompression sickness.
Descent rate--as fast as possible. Ascent rate--1 ft/min. Do not compensate for slower ascent rates. Compensate for faster ascent rates by halting the ascent.
Time at 165 feet-- includes time from the surface.
§If oxygen breathing must be interrupted as a result of adverse reaction, allow 15 minutes after the reaction has subsided and resume schedule at the point of interruption.
¥Caregiver breathes oxygen during ascent from 30 feet to the surface unless he has had hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.
Extensions: Table 6A can be lengthened up to 2 additional 25 minute periods at 60 feet (20 minutes on oxygen and 5 minutes on air) or up to 2 additional 75 minute oxygen breathing periods at 30 feet (15 minutes on air and 60 minutes on oxygen), or both. If Table 6A is extended either at 60 or 30 feet, the tender breathes oxygen during the last half at 30 feet and during ascent to the surface.
#If complete relief is not obtained within 30 min at 165 feet, switch to Table 4, consulting with a Diving Medical Officer if possible.
Adapted from the US Navy Diving Manual.


Table VIII. US Navy Treatment Table 4 - Air or Air and Oxygen Treatment of Type II Decompression Sickness or Arterial Gas Embolism*¥


Depth
(feet)
TimeBreathing
Media§
Total
Elapsed
Time (hrs:min)
165_ to 2 hr#Air2:00
140_ hrAir2:31
120_ hrAir3:02
100_ hrAir3:33
80_ hrAir4:04
606 hrAir or Oxygen/Air10:05
506 hr"16:06
406 hr"22:07
3012 hr"34:08
202 hr"36:09
102 hr"38:10
01 min"38:11

*Treatment of worsening symptoms during the first 20 minute oxygen breathing period at 60 feet on Table 6, or when symptoms are not relieved within 30 minutes at 165 feet using treatment Table 3 or 6A.
Descent rate--as rapidly as possible. Ascent rate--1 minute between stops.
Time 165 feet--includes time from the surface.
§If only air available--decompress on air. If oxygen available, patient begins oxygen breathing upon arrival at 60 feet with appropriate air breaks. Both tender and patient breathe oxygen beginning 2 hours before leaving 30 feet.
¥Ensure life support considerations can be met before committing to a Table 4. Internal chamber temperature should be below 85 degrees F 29.4° C.
If oxygen breathing is interrupted, no compensatory lengthening of the table is required.
#If switching from treatment table VIA at 165 feet, stay the full 2 hours at 165 feet before decompressing.
Adapted from the US Navy Diving Manual.


Table IX. US Navy Treatment Table 7- Oxygen/Air Treatment of Unresolved or Worsening Symptoms of DCS or AGE *†‡¶@


Depth (feet)Time (hours)Breathing Media¥Total
Time (hours)
6012 hr minimum¥ -no maximumOxygen 20 min, air 5 min12 hours
Ascend 3 ft/hr or two ft every 40 min 6 hours 18 hours
Ascend 2 ft/hr#10 hours 28 hours
Ascend 1ft/hr16 hours 44 hours
4 feet4 hour stop 48 hours
Ascend 1 ft/hr4 min 48 hours/4 min

*Used for treatment of unresolved life threatening symptoms after ini valign=toptial treatment on Table 6, 6A, or 4.
Use only under the direction of a Diving Medical Officer.
Table begins on arrival at 60 feet. Arrival at 60 feet is accomplished by initial treatment on Table 6, 6A or 4. If initial treatment has progressed to a depth shallower than 60 feet, compress to 60 feet at 25 ft/min to begin table 7.
§Maximum duration at 60 feet is unlimited. Remain at 60 feet a minimum of 12 hours unless overriding circumstances dictate earlier decompression.
¥Patient begins oxygen breathing periods at 60 feet. Caregiver need breathe only chamber air throughout. If oxygen breathing is interrupted, no lengthening of the table is required.
Minimum chamber O2 concentration: 19%. Maximum chamber CO2 concentration: 1.5% SEV (12 mm). Maximum temperature: 29.4°C.
#Decompression starts with a 2 foot upward excursion from 60 to 58 feet. Decompress with stops every 2 feet for the times shown on the above profile. Ascent time between stops is approximately 30 seconds. Stop time begins with ascent from deeper to next shallower step. Stop at 4 feet for 4 hours and then ascend to the surface at 1 ft/minute.
@Ensure chamber life support requirements can be met before committing to this table.
Adapted from the US Navy Diving Manual.


Table X. US Navy Treatment Table 5 - Oxygen Treatment of Type I DCS*¥


Depth
(feet)
Time
(minutes)
Breathing
Media
Total
Elapsed
Time (hrs:min)
6020O2§0:20
605Air0:25
6020O20:45
60to3030O21:15
305Air1:20
3020O21:40
305Air1:45
30 to 030O22:15

*Treatment of Type I decompression sickness when symptoms are relieved within 10 minutes at 60 feet and a complete neurological exam is normal.
Descent rate--25 ft/min. Ascent rate--1 ft/min. Do not compensate for faster rates by halting the descent.
Time at 60 feet begins on arrival at 60 feet.
§If oxygen breathing must be interrupted, allow 15 minutes after the reaction has entirely subsided and resume schedule at point of interruption.
¥If oxygen breathing must be interrupted at 60 feet, switch to Table 6 upon arrival at the 30 foot stop.
Caregiver breathes air throughout unless he has had a hyperbaric exposure within the past 12 hours, in which case he breathes oxygen at 30 feet.


Table XI. US Navy Treatment Table 3 - Air Treatment of Type II DCS or Arterial Gas Embolism*


Depth
(feet)
Time
(minutes)
Breathing
Media
Total
Elapsed
Time
(hrs:min)
16530 minAir0:30
14012 minAir 0:43
12012 minAir0:56
10012 minAir1:09
8012 minAir1:22
6030 minAir1:53
5030 minAir2:24
4030 minAir2:55
30720 minAir14:56
20120 minAir16:57
10120 minAir18:58
01 minAir18:59

*Treatment of Type II symptoms or arterial gas embolism when oxygen unavailable and symptoms are relieved within 30 minutes at 165 feet.
Descent rate--as rapidly as possible. Ascent rate--1 minute between stops.
Time at 165 feet--includes time from the surface.
Adapted from the US Navy Diving Manual.