Treatment of rterfal Gas Embolism or Decompression Sickness

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NOTES:

1. A Diving Medical Officer shall be consulted before committing to a Treatment Table 4 or 7.

2. Treatment Table 6A may be extended if necessary at 60 and/or under 30 feet.

3. Cardiac arrest requires Advanced Cardiac Life Support (ACLS). For the greatest chance of resuscitation consultation with a Diving Medical Officer is required as soon as possible (see paragraph 20-2.6).

4. Recompression chamber must be surfaced to perform defibrillation.

5. Assessment of patient must be made within 20 minutes. If the stricken diver remains pulseless after 20 minutes, termination of resuscitation may be considered.

6. Additional time may be required according to paragraph 21-5.4.5.4.

7. Enter Treatment Table 6A at depth of relief or significant improvement.

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Figure 21-5. Treatment of Arterial Gas Embolism or Decompression Sickness.

Figure 22-10. Fly Away Recompression Chamber Life Support Skid.

■ Primary. Sufficient air to pressurize the inner lock once to 165 feet and the outer lock twice to 165 feet and ventilate during one Treatment Table 4 (Chapter 21).

■ Secondary. Sufficient air to pressurize the inner and outer locks once to 165 feet and ventilate for one hour at 70.4 scfm.

22-4.1 Capacity. Either system may consist of air banks and/or a suitable compressor.

The primary recompression chamber support system must be capable of pressurizing the inner lock to a depth of 165 feet. The required total capacity is calculated as follows.

■ Primary System Capacity:

Where:

Cp = minimum capacity of primary system in scf

Vil = volume of inner lock in scf

Vol = volume of outer lock in scf

5 = atmospheres equivalent to 165 fsw

10 = twice 5 atmospheres

45,390 = total air in scf required to ventilate during a Table 4 Treatment

■ Secondary System Capacity:

Where:

Cs =

minimum capacity of secondary system in scf

Vil =

volume of inner lock

Vol =

volume of outer lock

5 =

atmospheres equivalent to 165 fsw

4224 =

air in scf required for maximum ventilation rate of 70.4 scfm for

one hour (60 min)

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