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Quiz - 34 - Diving Knowledge Workbook - Diving Physiology

Discussion in 'Basic Scuba Discussions' started by Pedro Burrito, Jun 30, 2020.

A symptom of air embolism may be ___, while two symptoms of DCS may be ___ and ___.

  1. a. pain in the joints, fatigue / sudden unconsciousness

  2. b. sudden unconsciousness / pain in the joints and fatigue

  3. c. coughing of bloody froth / dizziness and confusion

  4. d. cherry red nail beds / paralysis

Results are only viewable after voting.
  1. Pedro Burrito

    Pedro Burrito Moderator Staff Member ScubaBoard Supporter

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    From the Diving Physiology Section of the PADI Diving Knowledge Workbook Version 2.02 © PADI 2009:

    Objective 2.14 - Compare and contrast the various signs / symptoms of decompression sickness and air embolism.

    Question 1


    A symptom of air embolism may be ___, while two symptoms of DCS may be ___ and ___.

    a. pain in the joints, fatigue / sudden unconsciousness

    b. sudden unconsciousness / pain in the joints and fatigue

    c. coughing of bloody froth / dizziness and confusion

    d. cherry red nail beds / paralysis

    I will post a daily question from my exams to help newer divers and to encourage more experienced divers to interact gracefully and helpfully with the newer divers.

    Reminder - this is a post in the Basic Forum and it is a green zone. Please be nice and on topic.

    Thank you for your patience while we try to give people something to discuss other than Covid-19 and/or Politics. I will post the answer covered by the spoiler tag later today.
     
    Ukmc, scubadada and couv like this.
  2. TMHeimer

    TMHeimer Divemaster

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    Do I detect a discussion? More than one possibly correct?
     
  3. Brett Hatch

    Brett Hatch ScubaBoard Supporter ScubaBoard Supporter

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    I went with (c), but was very close to going (b). Is one of these two partially correct and the other one fully correct?
     
  4. Zef

    Zef Divemaster

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    "C" is the more correct answer as unconsciousness is a possible sign/symptom for both types of DCI, not one or the other.

    If the type of DCI is an AGE it can cause coughing and bloody froth/sputum, particularly if the embolism occurred in the lungs. Dizziness, confusion, loss of memory, and personality changes are among the signs and symptoms of DCS.

    -Z
     
  5. Ukmc

    Ukmc ScubaBoard Sponsor ScubaBoard Sponsor

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    We will see what the answer is, but b was pretty clear cut answer for me. I think sudden is the key. Also joint pain and fatigue are the most common symptoms of DCS.
     
  6. tursiops

    tursiops Marine Scientist and Master Instructor ScubaBoard Supporter

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    Agreed.
     
  7. Aviyes

    Aviyes Barracuda

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    The AGE itself does not cause the bloody froth. That would be some type of trauma to the lungs, that would then have caused an air embolism. Plenty of ways to get an air embolism that did not have an initial lung trauma.
     
    Brett Hatch likes this.
  8. Brett Hatch

    Brett Hatch ScubaBoard Supporter ScubaBoard Supporter

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    Aha. I had forgotten what AGE actually stands for, and was thinking that it was a lung embolism, hence responding with (c), since coughing up blood is likely a lung problem. But the "A" in AGE stands for "arterial," so we would be looking for problems delivering freshly-oxygenated blood, and sudden unconsciousness is of course one of those. I stand corrected, thank you for clarifying!
     
  9. Pedro Burrito

    Pedro Burrito Moderator Staff Member ScubaBoard Supporter

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    b. sudden unconsciousness / pain in the joints and fatigue

     
    scubadada and couv like this.
  10. GJC

    GJC Solo Diver

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    It's not the oxygen that causes unconsciousness, it's bubbles that get stuck in arteries in the brain and blocking blood flow that causes unconsciousness.
     
    Brett Hatch likes this.

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