surgical intervention most commonly present on the right side and within 7–12 days post -(passive) caused byBronchopleural fistulas
absence of or defects in the stapes(passive) caused byPerilymphatic fistulas ,
usually(passive) are ... causedDuodenocolic fistulas
sudden pressure changes such as in SCUBA diving , ascent or descent on a plane and weightlifting(passive) are most commonly caused byPerilymphatic fistulas
Good antenatal and obstetric carecan preventobstetric fistulas
difficult births(passive) are usually caused byObstetric fistulas