SUMC

Question 1

Describe Boyles Law?

Answer 1

Pressure + Volume Vary Inversely [Temp Constant]

P1V1 = P2V2

Question 2

Describe Charles’ Law?

Answer 2

Volume + Temperature Vary Directly [Pressure Constant]

V1/T1 = V2/T2

Question 3

Describe Gay-Lussac’s Law?

Answer 3

Pressure + Temperature Vary Directly [Volume Constant]

P1/T1 = P2/T2

Question 4

Describe Dalton’s Law?

Answer 4

Total Pressure = Sum Of All Partial Pressures

PTotal = P1 + P2 + Px

Question 5

Describe Henry’s Law?

Answer 5

Solubility Of Gas Varies Directly With Pressure + Varies Inversely With Temperature

Question 6

What Is Decompression Illness [DCI]?

Answer 6

Evolved Gas Disease

[Incorporates DCS + Barotrauma]

Question 7

Define Absolute Pressure?

Answer 7

Gauge Pressure + Atmospheric Pressure

Depth [Meters] + 10 / 10

Question 8

What Happens To Light As You Dive?

Answer 8

Light Wavelengths Blocked

Red = 1st
Blue = Last

[ROYGBIV]

Question 9

Injuries Associated With Descent?

Answer 9

[HONE]

High Pressure Neuro Syndrome
Oxygen Toxicity
Nitrogen Narcosis
Ear Barotrauma

Question 10

Injuries Associated With Ascent?

Answer 10

[PADS]

Pulmonary Over Inflation Syndrome
Arterial Gas Embolism
Decompression Illness [DCI]
Skin Squeeze

Question 11

Pros/Cons Of Oxygen?

Answer 11

Pro: Required To Breath

Cons: ^ = Toxicity [CNS = >1.7ata + Pulm = 0.5ata]
v = Hypoxia

Question 12

Pros/Cons Of Nitrogen?

Answer 12

Pros: Inert Gas

Cons: ^ = Narcosis + DCI

Question 13

Pros/Cons Of Carbon Dioxide?

Answer 13

Pros: Breathing Reflex

Cons: ^ = Dizzyness/SOB
v = Shallow Water Blackout [Loss Of Reflex]

Question 14

Pros/Cons Of Helium?

Answer 14

Pro: Inert Gas

Cons: ^ = Hypothermia + Narcosis + HPNS

Question 15

Benefits Of Nitrox?

Answer 15

Longer Duration Of Dive

Question 16

Benefits Of 100% Oxygen?

Answer 16

No Decompression Required

Question 17

Describe Haldane Principle?

Answer 17

Elimination Of Gas Occurs Exponentially @ Ratio 2:1

Question 18

Symptoms Of Decompression Illness?

Answer 18

[MR LSC]

MSK = Joint Pain
Resp = The Chokes
Lymphatic = Peu d’Orange
Skin = Rash
CNS = Ataxia + Parasthesia + Visual Disturbances

Question 19

Management Of Decompression Illness?

Answer 19

Hyperbaric Chamber

Question 20

Types Of Tables For Hyperbaric Chamber?

Answer 20

Table 61 = Missed Deco [~5min To Enter - RARE]
Table 62 = Short Decompression
Table 67 = Long Decompression

Question 21

Describe SCUBA?

Answer 21

Self Contained Underwater Breathing
< 30m
Compressed Air

Question 22

Describe Saturation Diving?

Answer 22

Trimix
Based Below 50m
Decompress Post Job

Question 23

What Depth Does HPNS Occur At?

Answer 23

150m

Question 24

Describe Guidelines For Recreational Diving?

Answer 24

BSAC + Self Report

Question 25

Describe Guidelines For Commercial Diving?

Answer 25

MA 1

Question 26

Describe Guidelines For Military Diving?

Answer 26

Br 1750a Chapter 12 | JSP 950

Question 27

Most Common Diving Injury?

Answer 27

ENT Barotrauma

Question 28

Most Severe Diving Injury?

Answer 28

Arterial Gas Embolism

Question 29

As Diver Ascends, What Law Dictates Gas Will Expand?

Answer 29

Boyles Law

Question 30

As Diver Descends, What Law Dictates Partial Pressures Will Increase?

Answer 30

Dalton’s Law

Question 31

Can Diver Continue With History Of Pneumothorax?

Answer 31

``` Spontaneous = NO Traumatic = YES [BUT NEEDS SMO[DM] REVIEW] ```

Question 32

Symptoms Of CNS Oxygen Toxicity?

Answer 32

``` [VENTID C] Vision Change Ear Tinnitus Nausea Tingling Irritation Dizzyness Convulsions ```

Question 33

What Does Nitrox 36 Mean?

Answer 33

36% Oxygen | 64% Nitrogen

Question 34

Atmospheric Pressure @ Surface?

Answer 34

1 ata

Question 35

Can You Sign Off Diver For Military Recreational Diving In Free Time?

Answer 35

No Can Only Sign Off For Diving @ Work

Question 36

What Effect Causes Decompression Illness?

Answer 36

Bubble Effect

Question 37

Describe Bubble Effect?

Answer 37

``` Increased Depth > Increased Partial Pressures [Daltons Law] Increased Partial Pressures > Increased Saturation Of Tissues [Henry’s Law] Increased Saturation > Super Saturation Ascent > Bubble Formation [Henry’s Law] Ascent > Larger Bubbles [Boyles Law] ```

Question 38

Differentiate Between Outer/Middle/Inner Ear Barotrauma?

Answer 38

``` Outer = Hood Squeeze + Descent Middle = Reverse Squeeze [Tympanic Membrane] + Ascent/Descent Inner = Oval/Round Window Rupture + Descent + ENDEX ```

Question 39

No Fly/Dive Time For Missed Decompression?

Answer 39

Fly = 24hrs Dive = 48hrs

Question 40

No Fly/Dive Time For DCI 1?

Answer 40

Fly = 72hrs Dive = 7 Days

Question 41

No Fly/Dive Time For DCI 2?

Answer 41

Fly = 72hrs [Table 62] OR ~6 Weeks [Unresolved] Dive = 28 Days OR ~SMO[DM] [Unresolved]