(2024 Exam) Dive Man Chamber Sup

Question 1

What is TT5 used for? #6

Answer 1

*Type 1 DCS
*Asymtomatic omitted “D”
*Tx of resolved Sx following in-water recompression
*Follow-up Tx for residual Sx
*Carbon Monoxide poisoning
*Gas Gangrene

Question 2

Time at depth on a TT4?

Answer 2

Between 30-120 minutes based on Px response.

Question 3

Minimum of how many periods at 60fsw on TT4?

Answer 3

Four O2 periods

After that, O2 breathing periods should be administered to suit the Px individual needs and operational conditions.

Question 4

TT4 cont. Both Px and tender must breathe O2 for at least ___ HRs, beginning no later than ___ hrs before ascent from 30feet is begun?

Answer 4

Four hrs Two hrs

These O2 breathing periods may be divided up as convenient, but at least 2 hrs worth of O2 breathing periods should be completed at 30 feet.

Question 5

What is TT7 used for?

Answer 5

It is a heroic measure for treating non-responding severe gas embolism or life-threatening Decompression sickness.

Is NOT used for: residual Sx that do not improve at 60 ft or to Tx residual pain.

Should be used only when loss of life may result if the currently prescribed Decompression from 60ft is taken.

Question 6

When using a TT7, a minimum of ___hrs should be spent at 60ft.

Answer 6

12hrs

Question 7

What is needed for stays longer than 18hrs at 60ft on TT7?

Answer 7

Solid evidence of continued benefit should be established.

Question 8

Tender Sur interval between consecutive TT1A,2A,3,5,6,6A?

Answer 8

18hrs

• However, if necessary tenders may repeat treatment tables 5,6 or 6A within this 18 hour service interval if oxygen is breathed at 30ft and shallower as outlined in table 17-7.
• Minimum SI’s for TT 1A, 2A, 3, 4, 7 and 8 shall be strictly observed

Question 9

Tender SI for consecutive TT4,7,8?

Answer 9

48 hrs

Question 10

Suitable PPO2 ranges for treatment gases?

Answer 10

1.5 to 3.0ata at treatment depth

Question 11

SI for tender before diving following TT5,6,6A,1A,2A or 3?

Answer 11

18hrs before No “D” diving
24hrs before “D” dives

Question 12

Post Tx consideration for PX following TT5?

Answer 12

Remain a TX facility for 2hrs

Question 13

Post Tx consideration for Px following Tx of Type 2 DCS or who required a TT6 and have complete relief of Sx?

Answer 13

Must remain at the Tx facility for 6hrs

• Px treated on TT6, 6A, 4, 7, 8 or 9 are likely to require a period of hospitalization, and the UMO will need to determine a post-treatment observation period.

Question 14

The Px-treatment observation period may be shortened if:

Answer 14

Upon UMO recommendation, provided the Px is with personnel experienced at recognizing recurrence of Sx and can return to the Tx facility w/in :30.

Question 15

All Px should remain w/in ___ min of travel time of a recompression facility for ___hrs and should be accompanied throughout that period.

Answer 15

60mins
24hrs

*No Px should be released until authorized by a UMO

Question 16

Tenders should remain at the Tx facility for ___hr following Tx? Also, following a TT4, 7, 8 they should?

Answer 16

1hr following Tx

Following TT4, 7, 8 they should remain w/in :60 of a Tx facility for a 24hr period

Question 17

Flying after Tx for Px and tenders?

Answer 17

Px recovered from DCS or AGE should not fly for 72hrs after Tx, at a minimum.

Tenders should have a 24hr SI before flying except for TT4,7,8 where it should be 72hrs.

Question 18

Death during Treatment Abort procedures for following initial recompression to 60, 165, 225 on TT 6, 6A, 4 or 8?

Answer 18

Decompress on Air/O2 tables using deepest depth and BT equal to or greater than the total time elapsed since Tx began.

• The Air/O2 schedules can be used even if gases other than air were used.

Question 19

If death occurs after leaving initial depth on TT6, 6A?

Answer 19

Decompress Tenders to 30 at 30fpm. Have tenders breathe O2 for time indicated on table 17-7.
Then decompress from 30ft to Sur at 1fpm

Question 20

If death occurs after leaving initial depth on TT4, 8 or beginning treatment on TT7 at 60ft?

Answer 20

Continue on TT as written, or consult NEDU.

Question 21

Impending natural disaster or mechanical failure, If time is not available?

Answer 21

• If deeper than 60ft, go to 60ft
• Go on O2 (all occupants) select air/o2 schedule from Decompression table using deepest and BT
• Breathe sum of stops 60ft and deeper at 60ft ( breathe O2 continuously)
• If shallower than 60ft at time of disaster, just breathe the sum of all stops deeper than current depth at that depth.
• then continue Decompression breathing O2 continuously
• when no more time is available, bring all occupants to Sur (trying not to exceed 10fpm) Keep all occupants on 100% O2 during evacuation, if possible.
• immediately evacuate to recompression facility and treat accordingly to fig 17-1(Up top 👆🏻)

Question 22

100% O2 can generally be tolerated for up to ___ hrs before Pulmonary O2 tox starts to become an issue?

Answer 22

12hrs

Question 23

Immersion diuresis causes divers to loose ____to _____cc of fluids per hour.

Answer 23

250-500cc

Question 24

TT6 extensions? How many and for what amount of time?

Answer 24

Two :25 periods at 60 (:20-O2 / :05-air)
and/or
Two :75 periods at 30 (:60-O2 / :15-air)

Question 25

How long are dive logs required to be held?

Answer 25

3 years

Question 26

Hypoxia, onset of hypoxic SX, point of helplessness, unconscious levels?

Answer 26

A drop below 0.16ata will cause onset of hypoxic Symptoms.

Helplessness @ 0.11ata

Unconscious @ 0.10ata

Question 27

Symptoms of Hypoxia?

Answer 27

Weakness
Inability to perform delicate or skilled task
Loss of judgement
Lack of concentration
Drowsiness
Euphoria
Agitation
Loss of consciousness
Lack of muscle control

Question 28

Hypercapnia symptoms?

Answer 28

Increased breathing rate
Shortness of breath (Dyspnea)
Confusion or feeling of euphoria
Inability to concentrate
Increased sweating
Drowsiness
Headache
Loss of consciousness
Convulsion

Question 29

Symptoms of Mediastinal and Subcutaneous emphysema?

Answer 29

In more severe cases, diver may experience
* Mild to moderate pain under breastbone, often described as a dull ache or feeling of tightness. Pain may radiate to the shoulder or back and may increase upon deep inspiration, coughing, or swallowing.
* Voice may change in pitch.
* Swelling or inflation of divers neck
* Movement of the skin near windpipe or about the collar bone may produce a cracking or crunching sound (Crepitation)

Question 30

Tx of mediastinal or subcutaneous emphysema?

Answer 30

*100% O2 on Sur
*If Sx are severe, shallow recompression may be beneficial
*Tx should only be carried out with the recommendation of the UMO after ruling out Pneumothorax.
* 100% O2 at lowest depth of relief. 1hr should be sufficient, but longer stays may be necessary

Question 31

Symptoms of Pneumothorax?

Answer 31

Sudden, sharp chest pain, followed by shortness of breath, labored breathing, rapid heart rate, weak pulse and anxiety.

Question 32

Tx of Pneumothorax?

Answer 32

Small- will reabsorb spontaneously
Mild- 100% O2, may require insertion of a chest tube.

If Px is recompressed for Tx of DCS/AGE will get relief on descent. A chest tube with a relief valve may need to be inserted a depth.

Question 33

What makes up a TT9?

Answer 33

Three :30 O2 periods with :05 air breaks in-between @ 45ft.

20ft-min descent & ascent

Question 34

Tender breathing consideration for TT9?

Answer 34

Tender breaths O2 for the last :15 @ 45 and during ascent.

Question 35

What is the descent rates for Tx, Sur “D”, and pressure candidate test (Dive candidate & Aviation)?

Answer 35

Tx- 20 fpm
Sur D’s- NTE 100fpm
Pressure candidate (Diver)-NTE 75fpm
Aviation- 10fpm. UMO may alter but cannot exceed 75fpm.

Question 36

Procedure for resuscitation of an pulseless diver?

Answer 36

• Make management decision considering all know factors
• Immediate CPR & AED applied.
• ACLS is a higher priority over recompression.
• Transport to highest level of care possible while pulseless.
• If Px regains vital signs, transport to nearest critical care facility.