NAUI Open
Water Dive
Certification=
Beginner test
with complete
verified
solutions(with
diagrams)
30 feet (6 inches per secound)
Your rate of ascent must not exceed a speed of
_______________ per minute if you are using the
standard NAUI dive tables.
small
,As you ascend or you feel yourself rising in the
water because of the expansion of air, you will
need to vent ___________ amounts of air from your
BC (or dry suit) to maintain neutral buoyancy.
Barotrauma
Injury caused by pressure to enclosed body
surfaces, for example from too much pressure in
the lungs.
perilymph fistula
a leak in inner ear fluid through a tear in either the
round or oval window permitting open exchange
between the middle ear and fluids of inner ear
decompression sickness (the bends)
Occurs when gases (usually Nitrogen) breathed by
the diver are absorbed into the bloodstream.
Arterial Gas Embolism
A condition in which air bubbles enter the
bloodstream and subsequently travel to the brain;
results from a rapid ascent from deep water, which
expands air in the lungs too quickly.
,-occurs due to pulmonary interstitial emphysema.
-most serious complication from diving
-AKA: pulmonary barotrauma
recompression
resubmission of a person to a greater pressure so
that gradual decompression can be achieved; often
used in the treatment of diving emergencies like
DCI.
Pulmonary Overinflation Syndrome (POIS)
group of barotrauma-related diseases caused by
the expansion of gas trapped in the lung (mainly
during the ascent), or over-pressurization of the
lung with subsequent over-expansion and rupture
of the alveolar air sacs.
the two main causes of alveolar rupture
-excess pressure inside of the lung caused by
positive pressure
-failure of expanding gasses to escape the lung
from the lung during the ascent
holds his breath
pulmonary overinflation from expanding gas failing
to escape from the lung during ascent can occur
when a diver voluntary ______________________
Interstitial emphysema
, the entrance of air into the connective tissue
stroma of the lung, mediastinum, or subcutaneous
tissue due to rupture of the alveolar lining. Causes
no damage unless further leaking occurs
mediastinal emphysema
The presence of air or gas in the mediastinum as a
result of leakage of air from the bronchial tree
subcutaneous emphysema
The presence of air in soft tissues, causing a
characteristic crackling sensation on palpation.
pneumothorax
air in the pleural cavity caused by a puncture of
the lung or chest wall
tension pneumothorax
a pneumothorax with rapid accumulation of air in
the pleural space causing severely high
intrapleural pressures with resultant tension on
the heart and great vessels.
nitrogen narcosis
a physiological condition caused by an increased
partial pressure of nitrogen, resulting in symptoms
similar to those of intoxication, impaired thought
symptoms of Barotrauma
clogging of ear
earpain
hearing loss
dizziness
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