Diving

Question 1

Boyles

Answer 1

pressure and vol

Question 2

Henrys Law

Answer 2

depth and gas solubility in liquids (higher partial pressure more gas dissolved eg. 3 units @ 1bar and 6 units @ 2 bar)

Question 3

Dalton Law

Answer 3

partial pressure and total gas pressure
eg. 1 bar = 0.21o2 + 0.79 N2
2 bar = 0.42 o2 + 1.58n2

Question 4

oxygen toxicity 2 types

Answer 4

CNS (Acute) 02 toxicity
Pulmonary (chronic) 03 toxicity

Question 5

what is CNS 02 toxicity?

Answer 5

high pp02 for a short time
Tonic (rigid) and Clonic (convulsions)
gives VENTID symptoms

Question 6

what is pulmonary 02 toxicity?

Answer 6

0.5 bar pp02 for a long time

Question 7

VENTID

Answer 7

Vision
Ears
Nausea
Twitching
Irritable
Dizzy

Question 8

co2 poisoning

surface equivalent co2 %?

Answer 8

0.0.5% 5pbm

Question 9

co2 poisoning s&S ?

Answer 9

match intense exercise

Question 10

co2 poisoning
1st aid ?

Answer 10

100% 02

Question 11

co2 poisoning increases chances of …?

Answer 11

DCI
Nitrogen Narcosis
Hypothermia
02 toxicity

Question 12

CO poisoning
S&S

Answer 12

cherry red
cyanosis
paralysis

Question 13

co poisoning

0.04% …
0.08% …
0.16% …
0.4% …

Answer 13

0.04% … fine (x10 = dead)
0.08% … headache
0.16% … confusion
0.4% … dead

Question 14

barotrauma means

Answer 14

pressure injury

Question 15

3 types of barotrauma

Answer 15

Emphysema (air trapped in lung tissue)
Pneumothorax (collapsed lung)
Arterial Gas Embolism (AGE) (bubbles in arteries to heart to brain)

Question 16

3 types of emphysema

Answer 16

1. mediastinal emphysema (gas trapped around heart)
2. interstitial emphysema (chest tissue)
   Subcutaneous emphysema (skin)

Question 17

2 types of DCI

Answer 17

DCS
AGE

Question 18

DCS vs AGE

Answer 18

AGE (rapid onset)(escaped gas into blood)(related to ascent rate but not depth or time)
DCS (delayed onset)(excess inert gas)(related to depth and time)

Question 19

1st aid for AGE

Answer 19

lie diver flat, 02, recompression

Question 20

1st aid for DCS

Answer 20

02 and Recompression

Question 21

classifications of DCI

Answer 21

Time (Acute or chronic)
Manifestation (cutaneous, lymphatic, pulmonary, neuro, cardiovascular..)
Evolution (Progressive, static, spontaneously improved, resolved, relapsing )

Question 22

Treat DCI
Is This Person Really So Clever

Answer 22

Inspection
tone
power
reflexes
sensation
co-ordination and balance

Question 23

DMT fluids
Shock
DCI
Burns

Answer 23

Shock = 250ml bolus until radial pulse back
DCI = 1 litre in 30 mins 1 litre in 60 mins
Burns = Vml = 4 x %burnt SA x weight
1/2 vol in 8 hours
1/2 vol in 16 hours

Question 24

3 conditions you wouldn’t give 02 for

Answer 24

COPD