CHAPTER 21 — Recompression Therapy
Change A 21-43
Treatment Table 4
1.
Descent rate - 20 ft/min.
2.
Ascent rate - 1 ft/min.
3.
Time at 165 feet includes compression.
4.
If only air is available, decompress on air. If oxygen is
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. (see paragraph 21-5.4.4.2).
5.
Ensure life-support considerations can be met before
committing to a Table 4. (see paragraph 21-5.6) Internal
chamber temperature should be below 85° F.
6.
If oxygen breathing is interrupted, no compensatory
lengthening of the table is required.
7.
If switching from Treatment Table 6A or 3 at 165 feet, stay
a maximum of 2 hours at 165 feet before decompressing.
8.
If the chamber is equipped with a high-O2 treatment gas,
it may be administered at 165 fsw, not to exceed 3.0 ata
O2. Treatment gas is administered for 25 minutes
interupted by 5 minutes of air.
Figure 21-10. Treatment Table 4.
Treatment Table 4 Depth/Time Profile
Time at Depth
Total Elapsed Time:
39 Hours 6 Minutes
(30 Minutes at 165 fsw) to
40 Hours 36 Minutes
(2 Hours at 165 fsw)
165
:30-2
hrs
0
2 hrs
12 hrs
6 hrs
6 hrs
:30
:30
:30
:30
25 min 20 min 20 min
20 min
20 min
10 min
10 min
10 min
10 min 10 min
1 min
60
50
80
100
120
140
30
40
20
10
0
Depth
(fsw)
Descent Rate
20 Ft/Min.
Patient begins oxygen breathing
at 60 Ft. Both patient and tenders
breathe oxygen beginning 2 hours
before leaving 30 Ft.
Ascent Rate 1 Ft/Min.
