General

Question 1

Explain safe way out procedures

Answer 1

If diver was decompressing at 20’ attempt to get to 20 ft in chamber.

Double number of 02 periods in table and take them at deepest depth diver can obtain

Interupt 02 breathing every 60 min with 15 min air break

Surface at 30 ft/MN. Observe for onset of DCs

Question 2

Whats the equation for electing SURD during 30 or 20 ft stops on 02

Answer 2

Take remaining o2 time at stops, add together. Multiply by 1.1 ÷ by 30 min

Results rounded up is # of chamber periods

Question 3

Equation for electing SURD during decompression on air

Answer 3

Get air/oxygen trading ration at 30 or 20 ft

Take remaining time on air
Divide remaining air time by air/o2 ratio.

Multiply that number by 1.1, to get chamber periods

Question 4

Equation for converting to air with permanent loss of o2 during SURD

Answer 4

Multiply remaining o2 chamber by the ration of water stop on air at 30 and 20 to the o2 time at those depths to obtain equivalent chamber deco on air.

Allocate 10% to the 40ft stop, 20% to the 30, and 70% to the 20ft stop.

Question 5

What are the uses of TT6

Answer 5

AGE, T2 SX, TYPE 1 W no relief at 60 ft in 10 min. Curtis marmorata, severe CO, CYANIDE poisoning, smoke inhalation. Asymptomatic omitted D, symptomatic uncontrolled ascent. Recurrence of sx shallower than 60 ft

Question 6

When to use 6A

Answer 6

AGE or Deco sx if unchanged or worsen w in first 20 min at 60

Question 7

Minimum manning levels for chamber

Answer 7

Emergency 2= dive sup. IT

Minimum 3= dive sup, IT, OT

Ideal 7

Question 8

Type 2 inner ear sx

Answer 8

Tinnitus
Hearing loss
Vertigo
Dizzy
Nausea
Vomiting
Balance issues

Question 9

Post treatment observation for patient

Answer 9

TT5= 2 hrs at facility
TT6 = T1 6 hrs.
TT6, 6a, 4,7,8, and 9= 30 min from from facility at UMO discretion for hospitalization

All patients within 60 min for 24 hrs

Question 10

Treatment of residual sx

Answer 10

UMO consult
Persistent type 2: daily TT6 or twice daily 5 or 9.

Question 11

When to use air TT

Answer 11

TT1A when pain is relieved at 66 or shallower

2A when pain is relieved at 67 or deeper

TT3 when serious sx or relieved at 30 min at 165

If sx are not relieved at 30 min, use TT4

Question 12

Use of TT5

Answer 12

Type 1 w complete neuro with no abnormalities (arrival at 60 ft another neuro)

Asymptomatic omitted D

TX of resolved SX
F/U of residual SX
CO Poisoning
Gas gangrene

Question 13

Explain TT4

Answer 13

Additional benefit at depth of relief, not to exceed 165

Time at depth between 30 to 120 min

Question 14

Cat D chamber

Answer 14

Bibs overboard dump
Co2 scrubber
Air/02 monitor
Air Bibs
IL once and OL twice to 165 on Air
IL and OL once to 165 allowing 1 tender and two patients to breathe Air Bibs on 6A with max extensions

Question 15

Surface interval > 5 min on SURD, < OR = 7 min

Answer 15

Increase 02 time at 50 ft from 15 to 30 if asymptomatic

Symptomatic (type 1 DCS):
TT5 if 2 or < SURD periods

TT6 if > 2 SURD periods

Question 16

What are EPs for chamber

Answer 16

Loss of air
Increase in air
Loss of o2
Contaminated air
Fire
Loss of primary (TL)
Loss of primary (TRC)

Question 17

What are the chamber levels

Answer 17

Level 1 w in 5 min
Level 2 w in 1 hrs
Level 3 w in 6 hrs

Question 18

When can tenders dive after treatment

Answer 18

TT5, 6, 6A, 1A, 2A, and 3 = 18hrs for no D, with D 24 hrs

TT4, 7, 8 = 48 hrs

Question 19

When can a patient eat/sleep during treatment

Answer 19

Sleep except when on O2 greater than 30ft

Food at any time

Question 20

Temp tolerance of chamber

Answer 20

85 everything
85 to 94 is 6 hrs/ TT5, 6, 6A, 9, 1A
95 to 104 is 2 hrs/ TT5, 9
104 and > intolerable

Question 21

Tender O2 breathing requirements

Answer 21

TT5 w or w out extensions= 0 min
TT6 up to 1 extension = 30 min
TT6 w more than 1 extension = 60 min
TT6 A w one extension = 60 min
TT6A more than one extension= 90

Question 22

What is proper patient hydration and urine output

Answer 22

75 to 100 cc/ per hour
Urine output .5 to 1cc per Kg/hr

Question 23

Guidance on recompression TX

Answer 23

Promptly and adequately
Effectiveness of treatment decreased with time
Do not ignore minor SX
Follow TT unless UMO deviates
Treatment for most serious sx

Question 24

When can tenders fly after treatment

Answer 24

TT5, 6, 6A, 1A. 2A, 3 = 24 hrs

4,7, and 8 = 72 hrs

Question 25

Immediate actions during CNS O2 Hit

Answer 25

1 manifestation on 5, 6, 6A= remove mask, wait for sx to subside, wait 15 min and resume at POI.

2 manifestation or a convulsion= remove mask. Sx subside, decompress 10 ft at 1ft/min, resume TX at POI

TT4, 6, and 8= 1 manifestation and convulsions, consult with DMO

Question 26

SI requirements for tenders between TXs

Answer 26

18 hrs SI for 1A, 2A, 3, 5, 6, 6A

48 hrs for 4,7, and 8

Question 27

5 non diving disorders that can be treated in chamber

Answer 27

Acute thermal burn
Delayed radiation injury
Severe anemia
Diabetic foot ulcers
Crush injury

Question 28

Primary objectives of recompression TX

Answer 28

Compress gas bubble to a smaller volume
Allow for reabsorption
Increase blood O2 content to injured tissue

Question 29

SI > 7 min during SURD

Answer 29

TT5 if 2 or < O2 periods
TT6 if 2.5 or more.chamber periods (asymptomatic diver or symptomatic)

Question 30

How do you calculate drip rate

Answer 30

Total volume in ML ÷ by time in Min, x drip factor