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Navy Diver 1st Class Exam 2024 > Dive Med and Chamber Ops > Flashcards

Dive Med and Chamber Ops Flashcards

1
Q

what is the model of the comms system used in the TRCS?

A

Amcom 1 model 2810-05

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2
Q

what must the CO2 concetration never exceed?

A

1.5 SEV

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3
Q

what is the coolant mixture used in the ECS?

A

50/50 propylene glycol/ water blend

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4
Q

The average human body has approximately ____ liters of blood.

A

5 liters

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5
Q

Hemoglobin takes up ____% of the ______ it can carry when exposed to normal partial pressure in the lungs.

A

98% / oxygen

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6
Q

Oxygen rich blood is _______ in color.

A

Bright red

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7
Q

The normal respiration rate for an adult

A

12 - 16 breaths per minute.

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8
Q

The total lung capacity for a normal adult

A

4 - 5 liters

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9
Q

The tidal volume of a normal adult

A

1 liter at rest and 3 liters at work

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10
Q

The complete round of circulation in the body normally takes ___

A

::20

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11
Q

Define hypoxia

A

Abnormal deficiency of oxygen

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12
Q

A drop in ppO2 below ___ ATA causes the onset of hypoxic symptoms.

A

0.16 ATA

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13
Q

A diver may become helpless or die if the ppO2 falls below _____ ATA.

A

0.11 ATA

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14
Q

Describe a pulmonary edema

A

Accumulation of fluid in the lungs

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15
Q

Why does excess carbon dioxide speed the onset of CNS O2 toxicity.

A

CO2 dilates the arteries, increasing blood flow.

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16
Q

Describe asphyxia

A

Breathing stops. Both hypoxia & hypercapnia occur simultaneously.

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17
Q

T/F. Carbon monoxide poisoning is felt on ascent due to the ppO2 reducing during this time.

A

True

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18
Q

The 3 bone of the inner ear

A

Malleus, incus, stapes

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19
Q

What must happen for any POIS to occur?

A

Rupture of the alveolar lining

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20
Q

4 types of POIS’s

A

AGE; Pneumothorax; Mediastinal & Subcutaneous emphysema

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21
Q

Most common cause of AGE

A

Exhaustion of gas supply & emergency ascent

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22
Q

Symptoms of AGE/DCS Type II

A

Unconsciousness, paralysis, numbness, weakness, fatigue, paresthesias, vertigo, convulsions, dizziness, tremors, nausea/vomiting, “blow to the chest”

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23
Q

T/F. Divers may suffer from subcutaneous emphysema without suffering from mediastinal emphysema.

A

False. Mediastinal is a prerequisite for subcutaneous emphysema.

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24
Q

Treatment for mild mediastinal emphysema

A

100% oxygen on surface

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25
Q

Is recompression for mediastinal authorized? …if so, when?

A

Yes, for severe cases with recommendation from DMO who ruled out occurrence of pneumothorax.

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26
Q

A sudden, sharp chest pain followed by shortness of breath, labored breathing, rapid heart rate, weak pulse, &/or anxiety are symptoms of…

A

Pneumothorax

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27
Q

Treatment of pneumothorax

A

100% oxygen. Mild to severe cases might require a chest tube or other advance treatment

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28
Q

T/F. A tension pneumothorax may be treated with shallow recompression in order to vent the thoracic cavity.

A

True

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29
Q

Nitrogen narcosis happens at partial pressures higher than ___ ATA

A

4 ATA

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30
Q

Pulmonary oxygen toxicity can occur anytime the ppO2 exceeds _____ ATA.

A

0.5 ata

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31
Q

A ___ exposure at 1 ATA will produce mild symptoms & measurable decrease in lung function.

A

12 hours

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32
Q

A ___ exposure at 2 ATA will produce mild symptoms & measurable decrease in lung function.

A

4 hours

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33
Q

The first sign of pulmonary oxygen toxicity may be ….

A

Burning sensation on inspiration

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34
Q

CNS oxygen toxicity can occur whenever the ppO2 exceeds ____ ATA in a wet diver and ___ ATA in a dry diver.

A

Wet: 1.3 ata / Dry: 2.4 ata

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35
Q

Intermittent exposure of _____ to low ppO2 will reduce the risk of CNS O2 toxicity.

A

5 - 15 mins

36
Q

3 phases of a convulsion

A

Tonic, Colonic, Postictal

37
Q

How long after coming off of oxygen can signs/ symptoms of CNS oxygen toxicity occur?

A

2 - 3 minutes

38
Q

High pressure nervous syndrome occurs during what types of dives?

A

Deep helium/ oxygen dives, 400-500 FSW on normal descent and slower descents may be as deep as 1000 FSW without symptoms

39
Q

Treatment for immersion pulmonary edema.

A

100% surface oxygen and immediate transport to medical treatment facility.

40
Q

Describe middle ear oxygen absorption syndrome and when it might occur.

A

Negative pressure that may develop in the middle ear after an oxygen dive.

41
Q

The maximum shock pressure a diver should be exposed to is ___ PSI.

A

50 psi

42
Q

The 6 steps to a neurological exam

A

Mental Status, Coordination, Motor Control, Cranial Nerves, Sensory, Deep Tendon Reflexes

43
Q

The most important part of the neurological exam

A

Mental Status

44
Q

The 6 steps to the coordination portion of a neurological exam

A

Walk, heel-to-toe, Romberg, finger-to-nose, heel shin slide, rapid movement

45
Q

Portion of the neurological exam is characterized by the patients alertness, orientation, & though process

A

Mental Status

46
Q

Most of the coordination tests concentrate on what?

A

Brain & inner ear function

47
Q

T/F. Speed & accuracy are important during the finger-tonose test.

A

False. Accuracy is, speed is not.

48
Q

How many cranial nerves are there?

A

12

49
Q

Pairs of nerves that run out of the cranial cavity through various openings in the skull are known as

A

Cranial Nerves

50
Q

What is the 1st cranial nerve?

A

Cranial Nerves

51
Q

What is the 1st cranial nerve?

A

Olfactory

52
Q

Which cranial nerve governs our sense of smell?

A

I. Olfactory

53
Q

What is the 2nd cranial nerve?

A

Optic

54
Q

Which cranial nerve governs vision?

A

II. Optic

55
Q

Having a patient read or testing their peripheral vision test which craning nerve?

A

II. Optic

56
Q

What is the 3rd cranial nerve?

A

Oculomotor

57
Q

What is the 4th cranial nerve?

A

Trochlear

58
Q

What is the 5th cranial nerve?

A

Trigeminal

59
Q

What cranial nerve(s) control eye movement?

A

Oculomotor, abducens, trochlear

60
Q

Observing pupil dilation or eye movement would be testing for which cranial nerve(s)?

A

Oculomotor, abducens, trochlear

61
Q

What is the 6th cranial nerve?

A

abducents

62
Q

Which cranial nerve governs the sensation of the forehead & face?

A

Trigeminal

63
Q

Gental stroking of the forehead, face, & jaw tests which cranial nerve?

A

Trigeminal

64
Q

What is the 7th cranial nerve?

A

Facial

65
Q

Which cranial nerve governs facial muscles?

A

Facial nerve

66
Q

Having a patient make various facial expressions (smile, wrinkle forehead, ect.) tests which cranial nerve(s)?

A

Facial nerve

67
Q

What is the 8th cranial nerve?

A

Acoustic

68
Q

Which cranial nerve governs balance & hearing?

A

Acoustic

69
Q

Having a patient listen for a sound, such as a tuning fork, tests which cranial nerve?

A

Acoustic

70
Q

What is the 9th cranial nerve?

A

Glossopharyngeal

71
Q

Observation of the palate rise as a patient says “AAH” tests which cranial nerve?

A

Vagus

72
Q

Which cranial nerve(s) are not normally tested?

A

Olfactory & Glossopharyngeal

73
Q

What is the 10th cranial nerve?

A

Vagus

74
Q

Which cranial nerve governs the gag reflex?

A

Glossopharyngeal

75
Q

What is the 11th cranial nerve?

A

Spinal Accessory

76
Q

The turning of the head or shrugging against resistance tests which cranial nerve(s)?

A

Spinal Accessory

77
Q

What is the 12th cranial nerve?

A

Hypoglossal

78
Q

Having the patient stick out their tongue & observing how it falls tests which of the cranial nerve(s)?

A

Hypoglossal

79
Q

The scale for muscular strength

A

0 - 5; 0: paralysis, 1: Profound weakness, 2: Severe weakness, 3: Moderate weakness, 4: Mild weakness, 5: Normal

80
Q

Running a pinwheel vertically from the top of the shoulder down to the groin is a test for which portion of the neurological exam?

A

Sensory

81
Q

T/F. The arms and legs are tested in three locations: one on the upper and two on the lower.

A

True

82
Q

There are ____ location(s) tested in the deep tendon reflexes

A

4

83
Q

Name the location(s) of the deep tendon reflexes.

A

Biceps, triceps, knees, ankles

84
Q

Nonexistent deep tendon reflexes are referred to as:

A

hypo-active

85
Q

Excessive deep tendon reflexes are referred to as:

A

hyper-active

86
Q

When testing deep tendon reflexes, what are you observing?

A

Type of reaction & if it is bilaterally equal.

Navy Diver 1st Class Exam 2024 (8 decks)

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