Audiometry

JERGERS CURVE ON IMPEDANCE AUDIOMETRY

🍉A CURVE-
  🍍normal
  🍍ET obstruction in some cases

🍉As CURVE/FIXATION OF OSSICLES-decreased compliance at ambient pressure
   🍍otosclerosis
   🍍tumors of middle ear
   🍍fixed malleus
    🍍tympanosclerosis

🍉Ad CURVE-increased complieance at ambient pressure
    🍍ossicular discontinuty
    🍍post stapedectomy
    🍍monomeric ear drum
     🍍lax TM

🍉B CURVE/FLAT/DOME SHAPED CURVE-lack of compliance
      🍍fluid in middle ear/SOM/AOM
       🍍TM perforation
       🍍grommet in ear
        🍍thickened TM

🍉C CURVE/ROUNDED-max compliance at pressures>100mm H2O
       🍍retracted TM
       🍍Faulty function of ET