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Intrathoracic pressure changes after Valsalva strain and other maneuvers: implications for divers with patent foramen ovale
exercise decompression nitrogen ear patent foramen ovale PFO
2009/6/8
Scuba divers with patent foramen ovale (PFO) may be at risk for paradoxical nitrogen gas emboli when performing maneuvers that cause a rebound blood loading to the right atrium. We measured the rise a...
The Valsalva Manoeuvre: A critical review
otic barotrauma barotrauma Valsalva manoeuvre equalization middle ear Eustachian tube DIVERS
2009/5/26
The Valsalva manoeuvre is commonly used in
diving to equalise middle ear pressures during descent. A
forceful expiration with the nostrils and mouth held shut
results in an increased nasopharyngeal...