title: Observation of eardrum movements during quasi-static pressure changes by high-speed digital imaging.
abstract: Under specific quasi-static pressure conditions during the Valsalva manoeuvre, high-speed digital video pictures of eardrum displacements were recorded using an endoscope and a Kodak Image Ektapro 1000 Motion Analyzer. A new type of data interface enabled the complete videoclip to be saved and processed digitally, and, with special mathematical algorithms, it is possible to generate three-dimensional computer animations of eardrum movements under quasi-static pressure. The present study describes patterns of eardrum movements under static pressure changes (Valsalva manoeuvre). These patterns were consistent with the results of finite-element simulations of highly similar eardrum displacements reported by other workers.
authors: Clinic of Otorhinolaryngology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany. ulrich.vorwerk@medizin.uni-magdeburg.de
authors: U
authors: U
authors: Vorwerk
authors: G
authors: G
authors: Steinicke
authors: K
authors: K
authors: Begall
mesh_terms: D000328:Adult; D000465:Algorithms; D006801:Humans; D007091:Image Processing, Computer-Assisted; D009038:Motion; D010781:Photography / Q000379:methods; D011312:Pressure; D014432:Tympanic Membrane / Q000502:physiology*; D014636:Valsalva Maneuver / Q000502:physiology*; D014743:Videotape Recording