Background
Recompression of diving casualties presenting symptoms of decompression sickness has been the treatment of choice since the late 1800s. This acceptance was primarily based on clinical experience.Hyperbaric chamber recompression
During the building of the1945 series of human experiments.
Field results showed that the 1944 oxygen treatment table was not yet satisfactory, so a series of tests were conducted by staff from the Navy Medical Research Institute and the Navy Experimental Diving Unit using human subjects to verify and modify the treatment tables. Tests were conducted using the 100-foot air-oxygen treatment table and the 100-foot air treatment table, which were found to be satisfactory. Other tables were extended until they produced satisfactory results. The resulting tables were used as the standard treatment for the next 20 years, and these tables and slight modifications were adopted by other navies and industry. Over time, evidence accumulated that the success of these table for severe decompression sickness was not very good. These low success rates led to the development of the oxygen treatment table by Goodman and Workman in 1965, variations of which are still in general use as the definitive treatment for most cases of decompression sickness.In water recompression
''History:Applications
Treatment ofEquipment
Recompression chamber
The type of chamber which can be used depends on the maximum pressure required for the schedule, and what gases are used for treatment. Most treatment protocols for diving injuries require an attendant in the chamber, and a medical lock to transfer medical supplies into the chamber while under pressure.Monoplace chambers
Outside of the diving industry, most chambers are intended for a single occupant, and not all of them are fitted with built-in breathing systems (BIBS). This limits the schedules which can be safely used in them. Some schedules have been developed specifically for hyperbaric oxygen treatment in monoplace chambers, and some hyperbaric treatment schedules nominally intended for chambers with BIBS have been shown to be acceptable for use without air breaks if the preferred facilities are not available.Treatment gases
Originally therapeutic recompression was done usingBuilt in breathing system
Treatment gases are generally oxygen or oxygen rich mixtures which would constitute an unacceptable fire hazard if used as the chamber gas. Chamber oxygen concentration is limited due to fire hazard and the high risk of fatality or severe injury in the event of a chamber fire. US Navy specifications for oxygen content of chamber air allow a range from 19% to 25%. If the oxygen fraction rises above this limit the chamber must be ventilated with air to bring the concentration to an acceptable level. To minimize the requirement for venting, oxygen-rich treatment gases are usually provided to the patient byUnits of measurement used in hyperbaric treatment
The commonly used units of pressure for hyperbaric treatment are metres of sea water (msw) and feet of sea water (fsw) which indicate the pressure of treatment in terms of the height of water column that would be supported in aHyperbaric chamber treatment schedules
The schedules listed here include both historical procedures and schedules currently in use. As a general rule, more recent tables from the same source have a greater success rate than the superseded schedules. Some of the older procedures are now considered to be dangerous.US Navy 1943 100-foot Air Treatment Table
Use: Treatment of decompression sickness where relief is obtained at or less than 66 fsw.U.S. Navy Department, 1943. Diving Manual. U.S. Government Printing Office, Washington, D.C. *Obsolete *Oxygen is not used *Maximum pressure 100 fsw (30 msw) *Run time 3 hours 37 minutesUS Navy 1943 150-foot Air Treatment Table
Use: Treatment of decompression sickness where relief is obtained at or less than 116 fsw. *Obsolete *Oxygen is not used *Maximum pressure 150 fsw (46 msw) *Run time 4 hours 55 minutesUS Navy 1943 200-foot Air Treatment Table
Use: Treatment of decompression sickness where relief is obtained at or less than 166 fsw. *Obsolete *Oxygen is not used *Maximum pressure 200 fsw (61 msw) *Run time 5 hours 58 minutesUS Navy 1943 250-foot Air Treatment Table
Use: Treatment of decompression sickness where relief is obtained at or less than 216 fsw. *Obsolete *Oxygen is not used *Maximum pressure 250 fsw (76 msw) *Run time 6 hours 46 minutesUS Navy 1943 300-foot Air Treatment Table
Use: Treatment of decompression sickness where relief is obtained at or less than 266 fsw. *Obsolete *Oxygen is not used *Maximum pressure 300 fsw (91 msw) *Run time 7 hours 29 minutesUS Navy 1944 Long Air Recompression Treatment Table
Use: Treatment of moderate to severe decompression sickness when oxygen is not available or the patient cannot tolerate the elevated oxygen partial pressure. *Oxygen is not used *Maximum pressure 165 fsw (50 msw) *Run time 5 hours 39 minutesUS Navy 1944 Long Air Recompression Treatment Table with Oxygen
Use: Treatment of moderate to severe decompression sickness when oxygen is available. *Oxygen is used *Maximum pressure 165 fsw (50 msw) *Run time 3 hours 0 minutesUS Navy 1944 Short Air Recompression Treatment Table
Use: Treatment of mild decompression sickness when oxygen is not available or the patient cannot tolerate the elevated oxygen partial pressure. *Oxygen is not used *Maximum pressure 100 fsw (30 msw) *Run time 5 hours 5 minutesUS Navy 1944 Short Oxygen Recompression Treatment Table
Use: Treatment of mild decompression sickness. *Oxygen is used *Maximum pressure 100 fsw (30 msw) *Run time 2 hours 17 minutesUS Navy Recompression Treatment Table 1
Use: Treatment of pain only decompression sickness. *Pain is relieved at less than 66 fsw (20 msw) *Oxygen is available *Maximum pressure 100 fsw (100 msw) *Run time 2 hours 21 minutes *Omitted from the US Navy Diving Manual since Revision 6US Navy Air Treatment Table 1A
Table 1A is included in the US Navy Diving Manual Revision 6 and is authorized for use as a last resort when oxygen is not available. This table has been revised by decreasing the ascent rate from 1 minute between stops to 1 fsw per minute since the original was published in 1958. Use: For treatment of pain only decompression sickness. *Pain is relieved at less than 66 fsw. (20 msw) *Air only, No oxygen. *Maximum pressure 100 fsw (30 msw) *Run time 7 hours 52 minutesUS Navy Recompression Treatment Table 2
Use: Treatment of pain-only decompression sickness. *Pain is relieved at greater than 66 fsw (20 msw) *Oxygen available *Maximum pressure 165 fsw (50 msw) *Run time 4 hours 1 minuteUS Navy Air Treatment Table 2a
Table 2A is included in the US Navy Diving Manual Revision 6 and is authorized for use as a last resort when oxygen is not available. This table has been revised by decreasing the ascent rate from 1 minute between stops to 1 fsw per minute since the original was published in 1958. Use: Treatment of pain only decompression sickness when oxygen cannot be used. *Pain is relieved at a depth greater than 66 fsw (20 msw). *Oxygen not available *Maximum pressure 165 fsw (50 msw) *Run time 13 hours 33 minutesUS Navy Air Treatment Table 3
Table 3 is included in the US Navy Diving Manual Revision 6 and is authorized for use as a last resort when oxygen is not available. This table has been revised by decreasing the ascent rate from 1 minute between stops to 1 fsw per minute since the original was published in 1958. Use: Treatment of serious symptoms when oxygen cannot be used and symptoms are relieved within 30 minutes at 165 feet. *Oxygen not available *Maximum pressure 165 fsw (50 msw) *Run time 21 hours 33 minutesUS Navy Recompression Treatment Table 4
This table is in the US Navy Diving Manual Revision 6 and is currently authorized for use. Use: Treatment of serious symptoms when oxygen can be used and symptoms are not relieved within 30 minutes at 165 fsw (50 msw). *Oxygen enriched treatment gases and Oxygen may be used. Air may be used if nothing better is available. If oxygen breathing is interrupted no compensation to the times is required. Oxygen partial pressure may not exceed 3 ata (3 bar). *Maximum depth 165 fsw (50 msw) *Time at 165 fsw optional from 30 minutes to 2 hours including compression *Total run time 39 hours 6 minutes to 40 hours 36 minutesUS Navy Recompression Treatment Table 5
Use: Treatment of pain-only decompression sickness when oxygen can be used and symptoms are relieved within 10 minutes at 60 ft. *Treatment Table 5 is currently included in the US Navy Diving Manual and is approved for use. *Oxygen treatment *Maximum pressure 60 fsw (18 msw) *Standard run time 2 hours 16 minutes *The table may be extended by two oxygen-breathing periods at the 30 fsw (9 msw) stopUS Navy Recompression Treatment Table 5a
Use: Treatment of gas embolism when oxygen can be used and symptoms are relieved within 15 minutes at 165 fsw (50 msw). *Treatment table 5a is not currently included in the US Navy Diving Manual (Revision 6). *Oxygen treatment *Maximum pressure 165 fsw (50 msw) *Run time 2 hours 34 minutesUS Navy Recompression Treatment Table 6
Use: Treatment of pain-only decompression sickness when oxygen can be used and symptoms are not relieved within 10 minutes at 60 fsw (18 msw). *Oxygen treatment *Maximum pressure 60 fsw (18 msw) *Run time 4 hours 45 minutesCatalina modification
The Catalina treatment table is a modification of Treatment Table 6. Oxygen cycles are 20 minutes, and air breaks 5 minutes. The full Catalina Table allows for up to 5 extensions at 60 fsw. Shorter versions include: * 3 oxygen cycles at 60 fsw followed by a minimum of 6 oxygen cycles at 30 fsw. (equivalent to USN Table 6) * 4 oxygen cycles at 60 fsw followed by a minimum of 9 oxygen cycles at 30 fsw. * 5 to 8 oxygen cycles at 60 fsw followed by a minimum of 12 oxygen cycles at 30 fsw. Tenders breathe oxygen for 60 minutes at 30 fsw. Further treatments may follow after at least 12 hours on air at the surface.US Navy Recompression Treatment Table 6a
Use: Treatment of gas embolism when oxygen can be used and symptoms moderate to a major extent within 30 minutes at 165 ft. *This treatment table is included in the US Navy Diving Manual Revision 6 and is currently authorized for use. It has been updated since original publication. *Oxygen treatment *Optional treatment with oxygen enriched gases (Heliox or Nitrox) not exceeding 3.0 ata (3 bar) partial pressure of oxygen if available *Maximum pressure 165 fsw (50 msw) *Nominal run time 5 hours 50 minutes from reaching full pressure At 50msw (absolute pressure 6 bar) an oxygen fraction of 50% will produce a partial pressure of 3 bar, This could be aUS Navy Treatment Table 7
Use: Treatment of non-responding severe gas embolism or life-threatening decompression sickness. It is used when loss of life may result from decompression from 60 fsw. It is not used to treat residual symptoms that do not improve at 60 fsw, or to treat residual pain. *Treatment table 7 is included in the US Navy Diving Manual Revision 6 and is currently authorized for use. *Oxygen is used if practicable *Maximum pressure 60 fsw (18 msw) *Minimum time at 60 fsw is 12 hours. Decompression following this length of exposure is generally considered decompression from saturation, so the decompression profile is not affected by longer exposure at 60 fsw. Use of this table may be preceded by initial treatment on table 6, 6A or 4. Table 7 treatment begins on arrival at 60 fsw. *Duration of decompression is 36 hours *Decompression comprises an approximated continuous ascent with stops every 2 fsw as shown in the graphic profile, with a stop at 4 fsw for 4 hours to avoid inadvertent loss of pressure due to seal failure at low pressure differences.US Navy Treatment Table 8
Use: Mainly for treating deep uncontrolled ascents when more than 60 minutes of decompression have been omitted. *Treatment table 8 is included in the US Navy Diving Manual Revision 6 and is currently authorized for use. *Adapted from Royal Navy Treatment Table 65. *Patient is recompressed to pressure of symptomatic relief but not to exceed 225 fsw and treatment initiated *Once begun, decompression is continuous, but may be interrupted at 60 fsw or shallower. *Heliox mixtures may be used at pressures exceeding 165 fsw to reduce nitrogen narcosis. Heliox 64/36 is the preferred treatment gas. *Heliox or Nitrox with partial pressure not exceeding 3 ata may be used as treatment gas at pressures less than 165 fsw *100% oxygen may be used as treatment gas at pressures less than 60 fsw *Decompression is done by 2 fsw pressure decrements unless the start depth is an odd number, in which case the first stop is at a 3 fsw reduction in pressure. Stop times vary according to the depth range of the stop. Shorter stops are done at greater pressures, and the stop time increases as the stops get shallower. *Nominal total ascent time from 225 fsw is 56 hours 29 minutes.US Navy Treatment Table 9
Use: Hyperbaric oxygen treatment as prescribed by Diving Medical Officer for: *Residual symptoms after treatment for AGE/DCS *Cases of carbon monoxide or cyanide poisoning *Smoke inhalation *Initial treatment of patients urgently needing definitive medical care for severe injuries. *Maximum pressure 45 fsw (13.5 msw) *Nominal elapsed time excluding pressurization 102 minutes *Treatment depth may be reduced to 30 fsw (9 msw) if patient cannot tolerate oxygen at 45 fsw (13.5 msw). *Table may be extended to a maximum of 4 hours oxygen breathing time.US Navy Treatment Table for decompression sickness occurring on saturation dives
Use: For treatment of decompression sickness manifested as musculoskeletal pains only, during decompression from saturation. *Maximum pressure specified is 1600 fsw *Recompression in increments of 10 fsw at 5 fsw per minute until diver reports improvement. It is not usually necessary or desirable to recompress by more than 30 fsw. *Treatment gas with oxygen partial pressure of up to 2.5 atm may be administered by BIBS mask for periods of 20 minutes, with breaks of 5 minutes on chamber gas during recompression and holding periods. Pure oxygen may be used at pressures less than 60 fsw. Use: For treatment of serious decompression sickness resulting from upward excursion. *Recompression immediately at 30 fsw per minute to at least the depth from which the excursion started. *If this does not provide complete relief compression should continue until relief is reported. *Hold at relief depth for at least 2 hours for pain only symptoms and at least 12 hours for serious symptoms. Decompress after treatment according to normal saturation decompression schedule from the treatment depth.Tektite I and II Treatment and emergency decompression schedule for a 42 to 50 foot saturation dive
Treatment of Tektite aquanauts after emergency surfacing. *Saturation gas mixture Nitrox 9% *Oxygen available *Maximum pressure 60 fsw (18 msw) *Run time 14 hours 40 minutesTektite II Treatment and emergency decompression schedule for the 100 foot saturation dive
Treatment of Tektite aquanauts after emergency surfacing. *Oxygen available *Maximum pressure up to 200 fsw *Run time variable depending on circumstancesRoyal Navy 1943 Recompression Treatment Procedure
Treatment of any decompression sickness symptoms. *Oxygen not used *Maximum pressure variable up to 225 fsw (68 msw) *Run time 4 hours 57 minutes to 5 hours 57 minutesRoyal Navy Table 51 - Air Recompression Therapy
Use: Treatment of pain-only decompression sickness when oxygen is not available and pain is relieved within 10 minutes at or less than 20 msw (667 fsw) *Oxygen not used *Maximum pressure 30 msw (98 fsw) *Run time 7 hours 5 minutesRoyal Navy Table 52 - Air Recompression Therapy
Use: Treatment of pain-only decompression sickness when oxygen is not available and pain is ''not'' relieved within 10 minutes at or less than 20 msw (66 fsw) but does have relief within 10 minutes at 50 msw (165 fsw). *Oxygen not used *Maximum pressure 50 msw (164 fsw) *Run time 9 hours 58 minutesRoyal Navy Table 53 - Air Recompression Therapy
Use: Treatment of joint pain plus a more serious symptom of decompression sickness when oxygen is not available and symptoms are relieved within 30 minutes at or less than 50 msw (164 fsw) *Oxygen not used *Maximum pressure 50msw (164 fsw) *Run time 19 hours 48 minutesRoyal Navy Table 54 - Air Recompression Therapy
Use: Treatment of joint pain plus a more serious symptom of decompression sickness when oxygen is available and symptoms are ''not'' relieved within 30 minutes at or less than *Oxygen available *Maximum pressure 50 msw (164 fsw) *Run time 39 hours 0 minutesRoyal Navy Table 55 - Air Recompression Therapy
Use: Treatment of joint pain plus a more serious symptom of decompression sickness when oxygen is not available and symptoms are ''not'' relieved within 30 minutes at or less than 50msw (164 fsw) *Oxygen not available *Maximum pressure 50 msw (164 fsw) *Run time 43 hours 0 minutesRoyal Navy Table 61 - Oxygen Recompression Therapy
Use: Treatment of pain only decompression sickness when oxygen is available and pain is relieved within 10 minutes or at less than 18 msw (59 fsw), or for serious symptoms where a specialist medical officer is present. *Oxygen treatment *Maximum pressure 18 msw (59 fsw) *Run time 2 hours 17 minutesRoyal Navy Table 62 - Oxygen Recompression Therapy
Use: Treatment of pain only decompression sickness when oxygen is available and pain is not relieved within 10 minutes at 18 msw (59 fsw), or for serious symptoms where a specialist medical officer is present. *Oxygen treatment *Maximum pressure 18 msw (59 fsw) *Run time 4 hours 47 minutesRoyal Navy Table 71 - Modified Air Recompression Table
Use: Treatment of any decompression symptom if a specialist medical officer is present. *Oxygen not available *Maximum pressure 70msw (230 fsw) *Run time 47 hours 44 minutesRoyal Navy Table 72 - Modified Air Recompression Therapy
Use: Treatment of any decompression symptom if a specialist medical officer is present. Applicable for multiple recompression of submarine survivors. *Oxygen not available *Maximum pressure 50 msw (164 fsw) *Run time 46 hours 45 minutesRNPL Therapeutic Decompression from a Helium-Oxygen Recompression
Use: Treatment of decompression sickness occurring during decompression from a Heliox dive. *Oxygen not used *Maximum pressure variable. May be greater than 137 msw (450 fsw) *Run time depends on treatment depthFrench Navy Recompression Treatment Table 1 (GERS 1962)
Use: Treatment of mild decompression sickness. *Oxygen is available *Maximum pressure 30 msw (98 fsw) *Run time 4 hours 12 minutesFrench Navy Recompression Treatment Table 2 (GERS 1962)
Use: Treatment of mild to moderate decompression sickness. *Oxygen is available *Maximum pressure 50 msw (164 fsw) *Run time 6 hours 44 minutesFrench Navy Recompression Treatment Table 3 (GERS 1962)
Use: Treatment of moderate to severe decompression sickness. *Oxygen is available *Maximum pressure 50 msw (164 fsw) *Run time 12 hours 44 minutesFrench Navy Recompression Treatment Table 4 (GERS 1962)
Use: Treatment of severe decompression sickness. *Oxygen is available *Maximum pressure 50 msw (164 fsw) *Run time 36 hours 14 minutes or 37 hours 44 minutesFrench Navy Recompression Treatment Table 4A (GERS 1962)
Use: Treatment of severe decompression sickness. *Oxygen is not available *Maximum pressure 50 msw (164 fsw) *Run time 38 hours 14 minutes or 39 hours 39 minutesFrench Navy Air Recompression Treatment Table (GERS 1964)
Use: Treatment of decompression sickness. *Oxygen is not available or the patient cannot tolerate high partial pressures of oxygen *Maximum pressure 50 msw (164 fsw) *Run time 73 hours 10 minutesFrench Navy Air Recompression Treatment Table (GERS 1964)
Use: Treatment of decompression sickness. *Oxygen is not available or the patient cannot tolerate high partial pressures of oxygen *Maximum pressure 50 msw (164 fsw) *Run time 76 hours 40 minutesFrench Navy High-Oxygen Recompression Treatment Table (GERS 1964)
Use: Treatment of moderately severe decompression sickness. *Oxygen is available *Maximum pressure 30 msw (98 fsw) *Run time between 20 hours 33 minutes and 36 hours 3 minutesFrench Navy Recompression Treatment Table A (GERS 1968)
Use: Treatment of mild decompression sickness after dives to less than 40 m depth. *Oxygen is available *Maximum pressure 30 msw (98 fsw) *Run time 5 hours 33 minutesFrench Navy Recompression Treatment Table B (GERS 1968)
Use: Treatment of mild decompression sickness after dives to more than 40 m depth. *Oxygen is available *Maximum pressure 30 msw (98 fsw) *Run time 8 hours 3 minutesFrench Navy Recompression Treatment Table C (GERS 1968)
Use: Treatment of moderately severe decompression sickness after dives to more than 40m depth or severe decompression sickness after dives shallower than 40m. *Oxygen is available *Maximum pressure 30 msw (98 fsw) *Run time 14 hours 29 minutes to 36 hours 57 minutesFrench Navy Recompression Treatment Table D (GERS 1968)
Use: Treatment of moderately severe and severe decompression sickness. *Oxygen is not available or cannot be tolerated by the patient *Maximum pressure 50 msw (164 fsw) *Run time 69 hours 45 minutes or 77 hours 45 minutesFrench Navy Recompression Treatment Table 1A (GERS 1968)
Use: Treatment of mild decompression sickness after dives to less than 40 m. *Oxygen is not available or cannot be tolerated by the patient *Maximum pressure 30 msw (98 fsw) *Run time 7 hours 18 minutesFrench Navy Recompression Treatment Table 2A (GERS 1968)
Use: Treatment of mild decompression sickness after dives to more than 40 m. *Oxygen is not available or cannot be tolerated by the patient *Maximum pressure 50 msw (164 fsw) *Run time 12 hours 45 minutesFrench Navy Recompression Treatment Table 3A (GERS 1968)
Use: Treatment of moderate or severe decompression sickness. *Oxygen is not available or cannot be tolerated by the patient *Maximum pressure 50 msw (164 fsw) *Run time 20 hours 45 minutesComex Therapeutic Table CX 12
Use: Treatment of musculoskeletal decompression sickness following normal decompression if symptoms are relieved within 4 minutes or at less than 8 msw. *Oxygen is available *Maximum pressure 12 msw (40 fsw) *Run time 2 hours 10 minutesComex Therapeutic Table 18C
Use: Treatment of musculoskeletal decompression sickness following normal or shortened decompression if symptoms are not relieved within 4 minutes at 8 msw, but are relieved within 15 minutes at or less than 18 msw. *Oxygen is available *Maximum pressure 18 msw (60 fsw) *Run time 2 hours 54 minutesComex Therapeutic Table 18L
Use: Treatment of musculoskeletal decompression sickness following normal or shortened decompression if symptoms are not relieved within 15 minutes at 18 msw. *Oxygen is available *Maximum pressure 18 msw (60 fsw) *Run time 4 hours 59 minutesComex Therapeutic Table CX 30
Use: Treatment of vestibular and general neurological decompression sickness following normal or shortened decompression. *Oxygen and Heliox 50 or Nitrox 50 is available *Maximum pressure 30 msw (100 fsw) *Run time 7 hours 2 minutesComex Therapeutic Table CX 30A
Use: Treatment of musculoskeletal decompression sickness when signs of oxygen toxicity are present. *Oxygen is available *Maximum pressure 30 msw *Run time 8 hours 44 minutesComex Therapeutic Table CX 30AL
Use: Treatment of vestibular and general neurological decompression sickness when signs of oxygen toxicity are present. *Oxygen is available *Maximum pressure 30 sw *Run time 11 hours 8 minutesRussian Therapeutic Recompression Regimen I
Use: Treatment of light forms of decompression sickness when the symptoms are completely resolved when reaching a pressure of 29 msw (96 fsw). *Oxygen is not used *Maximum pressure 49 msw (160 fsw) *Run time 13 hours 9 minutesRussian Therapeutic Recompression Regimen II
Use: Treatment of light forms of decompression sickness when the symptoms are completely resolved when reaching a pressure of 49 msw (160 fsw), or if there is a relapse after use of Regimen I. *Oxygen is not used *Maximum pressure 49 msw (160 fsw) *Run time 26 hours 11 minutesRussian Therapeutic Recompression Regimen III
Use: Treatment of moderately severe decompression sickness, or if there is a relapse after use of Regimen II. *Oxygen is not used *Maximum pressure 68 msw (224 fsw) *Run time 31 hours 26 minutesRussian Therapeutic Recompression Regimen IV
Use: Treatment of severe decompression sickness, or if there is a relapse after use of Regimen III. *Oxygen is not used *Maximum pressure 97 msw (320 fsw) *Run time 39 hours 2 minutesRussian Therapeutic Recompression Regimen V
Use: Treatment of very severe decompression sickness, or if there is a relapse after use of Regimen IV. *Oxygen is not used. Helium may optionally be used for compression below 224 fsw in addition to the air used for initial compression. *Maximum pressure 97 msw (320 fsw) *Run time 87 hours 7 minutes (3 days 15 hours 7 minutes)German Short Air Recompression Treatment Table used during the Rendsburg pedestrian tunnel project
Use: Treatment of mild decompression sickness where relief occurs within 30 minutes at 30 msw (98 fsw) *Oxygen not used *Maximum pressure 30 msw (98 fsw) *Run time 2 hours 18 minutesGerman Recompression Treatment Table used during the Rendsburg pedestrian tunnel project
Use: Treatment of mild decompression sickness where relief does not occur within 30 minutes at 30 msw (98 fsw) *Oxygen is used *Maximum pressure 30 msw (98 fsw) *Run time 5 hours 24 minutesGerman Recompression Treatment Table used during the Rendsburg pedestrian tunnel project
Use: Treatment of severe decompression sickness where relief does not occur within 30 minutes at 30 msw (98 fsw) *Oxygen is used *Maximum pressure 30 msw (98 fsw) *Run time 36 hours 55 minutes or 38 hours 25 minutesOxygen tables designed for monoplace chambers
(specifically for chambers without facility for air breaks)Hart monoplace table
100% oxygen for 30 minutes at 3.0 ATA followed by 60 minutes at 2.5 ATA.Kindwall's monoplace table
Indication: :Pain only or skin bends for symptoms that resolve within 10 minutes of reaching treatment depth: :*30 minutes at 2.8 bar (60 fsw) :*Continuous decompression to 1.9 bar over 15 minutes :*60 minutes at 1.9 bar (30 fsw) :*Continuous decompression to surface over 15 minutes :Neurological decompression sickness, arterial gas embolism or unresolved symptoms after 10 minutes at treatment pressure: :*30 minutes at 2.8 bar (60 fsw) :*Continuous decompression to 1.9 bar over 30 minutes :*60 minutes at 1.9 bar (30 fsw) :*Continuous decompression to surface over 30 minutes :*Repeat after 30 minutes on air at surface pressure if symptoms have not resolved.In-water recompression schedules
In-water recompression (IWR) or underwater oxygen treatment is the emergency treatment ofAustralian In-water Recompression Table
The Australian IWR Tables were developed by theClipperton In-water Recompression Tables
The Clipperton and Clipperton(a) methods were developed for use on aHawaiian In-water Recompression Table
The Hawaiian IWR table was first described by Farm et al. while studying the diving habits ofPyle In-water Recompression Table
The Pyle IWR table was developed by Dr. Richard Pyle as a method for treating DCS in the field following scientific dives. This method begins with a 10-minute surface oxygen evaluation period. Compression to 25 fsw on oxygen for another 10-minute evaluation period. The table is best described by the treatmentUS Navy In-water Recompression Tables
TheRoyal Navy Table 81 - Emergency therapy in the water
Use: Emergency in-water recompression when no chamber is available. *Oxygen is not used *Maximum depth 30 m (98 ft) for 5 minutes *Continuous ascent to 20 m at 4.5 minutes per metre *Continuous ascent to 10 m at 8 minutes per metre *Continuous ascent to surface at 15 metres per minute *Run time 4 hours 41 minutes"Informal" in-water recompression
Although in-water recompression is regarded as risky, and to be avoided, there is increasing evidence that technical divers who surface and demonstrate mild DCS symptoms may often get back into the water and breathe pure oxygen at a depth 20 feet/6 meters for a period of time to seek to alleviate the symptoms. This trend is noted in paragraph 3.6.5 ofOther tables to be fitted in later
Lambertsen/Solus Ocean Systems Table 7A
Used in commercial diving for: * symptoms that develop at pressure. * recompression deeper than 165 fsw (50msw)' or * Where extended decompression is necessary. Depth limit 200 fsw for air.IANTD in-water recompression schedules
Used for emergency recompression of technical divers in remote areas.References
Further reading
* * {{Medicine Diving decompression Diving medicine Medical treatments Oxygen Respiratory therapy Underwater diving emergency procedures