Valsalva"s antrum - ορισμός. Τι είναι το Valsalva"s antrum
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Τι (ποιος) είναι Valsalva"s antrum - ορισμός

AIR SPACE IN THE PETROUS PORTION OF THE TEMPORAL BONE
Tympanic antrum; Antrum mastoideum; Valsalva's antrum

Valsalva maneuver         
  • Astronaut showing the use of the "Valsalva"
TECHNIQUE FOR EQUALISING PRESSURE IN THE MIDDLE EARS
Valsva manoeuvre; Valsalva manoeuvre; Valsalva maneouvre; Valsalva's maneuver; Valsalva; Valsalva Manuever; Valsalva Maneuver; Valsalve Maneuver; Valsalve; Valsarva maneuver; Vagal manoeuvres; Valsalva test; Valsalva manoeuvres; Ear equalization; Blowout nose closed
The Valsalva maneuver is performed by a forceful attempt of exhalation against a closed airway, usually done by closing one's mouth and pinching one's nose shut while expelling air out as if blowing up a balloon. Variations of the maneuver can be used either in medical examination as a test of cardiac function and autonomic nervous control of the heart, or to clear the ears and sinuses (that is, to equalize pressure between them) when ambient pressure changes, as in scuba diving, hyperbaric oxygen therapy, or air travel.
Valsalva manoeuvre         
  • Astronaut showing the use of the "Valsalva"
TECHNIQUE FOR EQUALISING PRESSURE IN THE MIDDLE EARS
Valsva manoeuvre; Valsalva manoeuvre; Valsalva maneouvre; Valsalva's maneuver; Valsalva; Valsalva Manuever; Valsalva Maneuver; Valsalve Maneuver; Valsalve; Valsarva maneuver; Vagal manoeuvres; Valsalva test; Valsalva manoeuvres; Ear equalization; Blowout nose closed
[val'salv?]
¦ noun Medicine the action of attempting to exhale with the nostrils and mouth, or the glottis, closed, serving to increase pressure in the middle ear and the chest or equalize pressure in the ears.
Origin
C19: named after the Italian anatomist Antonio M. Valsalva.
Mastoid antrum         
The mastoid antrum (tympanic antrum, antrum mastoideum, Valsalva's antrum) is an air space in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum (entrance to the mastoid antrum). These air spaces function as sound receptors, provide voice resonance, act as acoustic insulation and dissipation, provide protection from physical damage and reduce the mass of the cranium.

Βικιπαίδεια

Mastoid antrum

The mastoid antrum (tympanic antrum, antrum mastoideum, Valsalva's antrum) is an air space in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aditus to mastoid antrum (entrance to the mastoid antrum). These air spaces function as sound receptors, provide voice resonance, act as acoustic insulation and dissipation, provide protection from physical damage and reduce the mass of the cranium. The roof is formed by the tegmen antri which is a continuation of the tegmen tympani and separates it from the middle cranial fossa. The lateral wall of the antrum is formed by a plate of bone which is an average of 1.5 cm in adults. The mastoid air cell system is a major contributor to middle ear inflammatory diseases.