In 2001, Rimbach et al. reported in a large multicenter study involving 367 patients on the limitations of the procedure. Problems were encountered in the ability to enter the tubes, and, even when tubes were cannulated, light reflexions or "white out" from healthy tissue as well as adhesions turned out to be a major problem. Thus, the investigators were able to fully examine tubes in only 2 out of 3 cases; perforations occurred in about 4% of cases. Since then, interest in<unk>  has declined and few studies have been published.
Falloposcopy
Myringotomy
Keratoscope
Stroboscope
SurgiScope
Vascular snare
Frenuloplasty of tongue
Pharyngeal flap surgery