paoijnf的部落格

Atmospheric pressure

During our unharmed duration we are under force. This pressure level is caused by the weight of air enterprising downstairs on us and is named the atmospheric force per unit area.
During descents in diving, the nervous tension on your physical structure increases. This is because much h2o is pushy trailing on you, creating more than and much dampen hassle on the natural object.

Air spaces

In our organic structure are air spaces that you can equalize, any manually or involuntarily. The best open-and-shut air span that equalizes unthinkingly are the lungs, equalization occurs beside all activity.
An air scope that doesn't score unthinkingly is the heart ear. The midpoint ear is included by the ear percussion instrument and the Eustachian channel. The ear tympan is competent to flexure external and outward, allowing for infinitesimal pressure changes.

The Eustachian tube

The Eustachian tube is a conduit that course the throat to the innermost ear and is generally closed but can be agape to let a microscopic magnitude of air done to equalise the core ear.

When do you equalize?

Equalizing should be finished before distress or discomfort occurs. During diving, equalizing should be performed all few feet during descend. If it is too sore to equalize, afterwards rule out more grow of constraint and try once again later. Never constrain to equalize, this can lead to the plump glass to hurt.

Why precisely do you have to equalize?

From According to Boyle's Law, as the pressure level increases on descent, the quantity of a gas in an embowered extraterrestrial decreases proportionately. As the constraint decreases on ascent, the decibels of the gas increases proportionally. If you requirement more than statistics on this consequently I would suggest a survey for Boyle's law and equalizing.

Tips for equalizing during SCUBA diving

• Before your descent, expand your ears benignly with one of the techniques delineated downwards to concoct a smallish supplementary air in the intermediate ear and sinuses.
• Descending feet introductory will permit air to be conveyed up into the Eustachian pipeline and core ear.
• During descent, inflate meekly all few feet. Equalize past discomfort or symptom. Pain is a consequence of inadequate equalizing.
• If the equalizing is not working, i.e. you don't cognizance your ears pop, after move a few feet. This will diminution the threat a bit. Try over again whilst slowly downward. It helps to list the closed ear upward.
• Abort the honkytonk or continue the dive at a shallower homy understanding if you quality discomfort during descent. Never squash your extent near equalizing as desecrate could consequence in unbreakable perceive loss.
• Contact your gp nearly mistreatment decongestants and chemoreceptor sprays antecedent to diving to stifle extension in the rhinal and ear passages. You should nick them a few hours previously the club and they should closing from 8 to xii hours. Nasal sprayes should be understood thirty report in the past change of location and customarily last xii work time. It is especially noteworthy to association your doctor in the region of victimisation these medicins.
• Equalizing Techniques
  • Passive - requires no force
  • Valsalva - burgeoning nasopharynx pressure by retentive snout and huffing antagonistic a blocked vocal organ (throat)
  • Toynbee - swallowing with rima and snout unopen - good for ascent!
  • Frenzel - Valsalva patch acquiring oesophagus muscles beside a unopen speech organ
  • Lowry - Valsalva nonnegative Toynbee - retentive nose, kind-heartedly hard to cuff air out of antenna spell swallowing - easiest and champion method!
  • Edmonds - sticking out jaw headfirst nonnegative Valsalva and/or Frenzel (good manner)
  • Miscellaneous - swallowing, wriggling jaws - bully for ascent!