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HBO CHT EXAM
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -100 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: One of the possible effects of a pulmonary barotrauma is?
Answer:
Pneumothorax
Question 2: 21% oxygen at 1 ata is the same value as
Answer:
159.6 mmHg You get this by 760 x .21= 159.6 Question 3: The gas that a scuba diver breathes has a great impact on the occurrence of decompression sickness. Breathing which gas (during a 60 FSW dive for 60 minutes) will be most lkely to cause decompression sickness?
Answer:
Air... The Gas of concern is nitrogen. Oxygen has none and Nitrox has less than air.Question 4: Signs and symptoms of middle ear barotrauma include:
Answer:
Pain in the ear during pressure change, fullness or difficulty hearing, tympanic membrane rupture. (NOT popping noises, that is sign that ears are clearing)
Question 5: Gay-Lussac's law (in the hyperbaric chamber) is important to understand because when we start decreasing the pressure in the chamber, the patient is likely to complain about it
Answer:
being cold Question 6: It is not possible to cause an outer ear barotrauma in the hyperbaric chamber since the ear canal is not a trapped air space. True or false?
Answer:
False; you can trap ear in the outer ear with ear plugs, hearing aids, and ear wax
Question 7: Solid is defined as?
Answer:
A liquid that is at its freezing point.Question 8: When a scuba diver has an inadequate deompression, bubbles may form due to?
Answer:
Reducing barometric pressure
Question 9: Gauge pressure?
Answer:
The amount of pressure within the sealed vessel only
Question 10: In the gas phase, the atoms or molecules basically move?
Answer:
Randomly
Question 11: To convert from FSW to ATA
Answer:
Divide by 33, then add 1 Question 12: The book, barometric pressure, described what is now known as bubble theory of decompression illness. What physiologic occurrence is considered the hallmark of decompression illness?
Answer:
A buildup of Nitrogen bubbles in the tissues.
Question 13: Describe the path of air takes when it travels into the lungs.
Answer:
Trachea, bronchi, bronchioles, alveoli
Question 14: Boyle's law equation?
Answer:
P1 x V1=P2 xV2 Question 15: Gay-Lussac's law (in scuba diving) is important to understand because when we start increasing the pressure in a scuba tank (during a refill at the scuba shop), the tank will get ____ during the refill, then ____ while it sits at room temperature. This will cause the pressure of gas in the cylinder to________.
Answer:
Warmer; cool; decrease
Question 16: Nitrogen narcosis is often referred to as?
Answer:
Rapture of the deep
Question 17: Priestley published his discovery of oxygen in?
Answer:
1775 Question 18: Decompression sickness (DCS) can occur during the beginning part of scuba dive? true or false
Answer:
False
Question 19: Henry's law is about?
Answer:
Gas in solution; the amount of a gas dissolved in a liquid is directly proportional to the partial pressure of the dissolved gas.
Question 20: The treatment for complaints of ear pain during pressurization is?
Answer:
Stop compressing the chamber
Question 21: Barotrauma medical term?
Answer:
Otic barotrauma Question 22: Gastrointestinal barotrauma is very rare however it can occur on the?
Answer:
Ascent; Coming up air expands!Question 23: "adiabatic heating" and "adiabatic cooling" refer to?
Answer:
The temperature rise and temperature drop when chamber pressure changes
Question 24: To convert from ATA to PSI
Answer:
Subtract 1, then multiply by 14.7 Question 25: Gay-Lussac's law (in scuba diving) is important to understand because when we let a full scuba cylinder lay in the sun and heat up, the pressure in the tank will ________. this could potentially cause ______
Answer:
Increase; the scuba cylinder to rupture.Question 26: The work developing stage decompression was commissioned by the British Royal Navy in?
Answer:
Early 1900's
Question 27: A barotrauma invloving a tooth can be called a tooth squeeze or?
Answer:
Barodontalgia
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