title: An optic pharyngeal manometric sensor for deglutition analysis.
abstract: A micro optic pharyngeal manometric sensor for deglutition analysis was constructed. The optical manometric sensor was composed of a fluid-sensitive and air-sensitive fiber-optic pressure sensor (extrinsic Fabry-Perot interferometric type) and a lateral pressure-sensitive attachment. The manometric sensor was circumferential type, and had a very small diameter (distal: 2.08 mm, mesial: 0.99 mm). The output current of the sensor was linearly related to the output of a conventional catheter-type solid-state pressure sensor over a range of -3.0 x 10(4) to 3.0 x 10(4) N/m(2). The time constants of responsiveness were 12.2 +/- 2.7 ms during rapid decompression and 32.1 +/- 1.6 ms after a rapid return to ambient pressure. The optical pharyngeal manometric sensor had similar response time characteristics as the naked optical sensor and the conventional solid-state sensor. During in vivo measurement, the waveform of the optical pharyngeal manometer output was almost similar to the waveform of the output of the conventional sensor. The optical manometer could sufficiently detect the lateral pressure and the suction pressure for bolus transit generated in the P-E segment.
authors.affiliation: Department of Gerodontology, Division of Gerontology and Gerodontology, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Tokyo 113-8510, Japan.
authors.forename: Shuhei
authors.initials: S
authors.lastname: Takeuchi
authors.forename: Haruka
authors.initials: H
authors.lastname: Tohara
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kudo
authors.forename: Kimio
authors.initials: K
authors.lastname: Otsuka
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Saito
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Uematsu
authors.forename: Kohji
authors.initials: K
authors.lastname: Mitsubayashi
mesh_terms: D003680:Deglutition Disorders / Q000175:diagnosis* / Q000503:physiopathology*; D003936:Diagnosis, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D008365:Manometry / Q000295:instrumentation* / Q000379:methods; D055095:Optics and Photonics / Q000295:instrumentation*; D010614:Pharynx / Q000503:physiopathology*; D011312:Pressure; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods; D014159:Transducers