[Early postoperative middle-ear ventilation -- risk for the transplant or guarantee for aeration of the tympanic cavity?].
BACKGROUND
Sufficient ventilation of the tympanic cavity is a decisive factor for the success of the therapy and the prognosis after tympanoplastic surgery. With the postoperative use of the Valsalva- and Politzer-maneuver the patient is able to influence the aeration of the tympanic cavity in a positive way by autoinsufflation. However this implicates the risk of a dislocation of the transplant, which is possibly caused by high middle-ear pressure-peaks during the maneuvers mentioned.


METHODS
The actual increase of pressure in the tympanic cavity respectively auditory canal during the Valsalva- and Politzer-maneuver is examined in 22 patients with chronic-mesotympanic Otitis media and additionally by using an experiment with a model of a reconstructed middle-ear. The risk of a transplant-dislocation after tympanoplasty type I is estimated.


RESULTS
The increase of pressure in the middle ear respectively auditory canal -- and with that the possibility of a dislocation of the transplant -- is lower after Politzer- compared with Valsalva-maneuver. If the transplant is secured through silicon sheets and packings in the auditory canal, the probability of "blowing away" the newly created cover of the tympanon will be very small.


CONCLUSIONS
Because of the benefits for the aeration of the tympanic cavity, an early post-operative insufflation of the middle-ear -- using the Politzer- and/or "cautious" Valsalva-maneuver -- is recommended.
Dörrie
A
A
Klinik und Poliklinik für Hals-Nasen-Ohrenheilkunde, Kopf und Halschirurgie, Otto Körner Universität Rostock.
Dommerich
S
S
Pau
H W
HW
D000399:Air Pressure; D004424:Ear Canal / Q000503:physiopathology; D005064:Eustachian Tube / Q000503:physiopathology; D006801:Humans; D008876:Middle Ear Ventilation / Q000379:methods*; D009998:Ossicular Prosthesis; D010033:Otitis Media / Q000503:physiopathology / Q000601:surgery*; D011182:Postoperative Care; D011183:Postoperative Complications / Q000503:physiopathology*; D011475:Prosthesis Failure; D012307:Risk Factors; D016896:Treatment Outcome; D018058:Tympanic Membrane Perforation / Q000503:physiopathology / Q000601:surgery*; D014433:Tympanoplasty; D014636:Valsalva Maneuver / Q000502:physiology