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Related Concept Videos

Deglutition01:25

Deglutition

Swallowing, otherwise known as deglutition, facilitates the transport of food from the mouth to the stomach. It is a multifaceted process that involves both the tongue and the muscles of the throat and esophagus. Saliva and mucus aid in this process, which takes approximately 4 to 8 seconds for semi-solid or solid food and around 1 second for liquids or very soft food.
Swallowing can be divided into three stages: the voluntary phase, the pharyngeal phase, and the esophageal phase. Although the...
Suctioning the Oropharyngeal Airway01:25

Suctioning the Oropharyngeal Airway

In preparing for oropharyngeal airway suctioning, a nurse must gather all necessary equipment, including a suction unit with tubing, a prepackaged suction kit, sterile gloves, water or saline for irrigation, a water-soluble lubricant, and additional personal protective equipment (such as a gown, mask, and goggles) to control infections.
After assembling the equipment, the nurse should practice hand hygiene and don appropriate PPE according to infection control guidelines to avoid the...
Suctioning the Nasopharyngeal Airway01:29

Suctioning the Nasopharyngeal Airway

Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
Equipment Required

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Related Experiment Video

Updated: Jul 14, 2026

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
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An optic pharyngeal manometric sensor for deglutition analysis.

Shuhei Takeuchi1, Haruka Tohara, Hiroyuki Kudo

  • 1Department of Gerodontology, Division of Gerontology and Gerodontology, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Tokyo 113-8510, Japan.

Biomedical Microdevices
|July 3, 2007
PubMed
Summary

A novel micro optic pharyngeal manometric sensor was developed for swallowing analysis. This fiber-optic sensor accurately measures pharyngeal pressure, offering a minimally invasive tool for deglutition research.

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Last Updated: Jul 14, 2026

Adapting Human Videofluoroscopic Swallow Study Methods to Detect and Characterize Dysphagia in Murine Disease Models
08:32

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Published on: March 1, 2015

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06:46

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Published on: December 14, 2020

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
07:45

Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing

Published on: December 1, 2023

Area of Science:

  • Biomedical Engineering
  • Gastroenterology
  • Sensor Technology

Background:

  • Deglutition analysis requires accurate pharyngeal pressure measurement.
  • Conventional sensors can be invasive or lack precision.
  • Minimally invasive sensing technologies are needed for swallowing studies.

Purpose of the Study:

  • To construct and validate a micro optic pharyngeal manometric sensor for deglutition analysis.
  • To assess the sensor's performance against conventional pressure sensors.
  • To evaluate its capability in detecting pressures during bolus transit.

Main Methods:

  • Fabrication of a fiber-optic pressure sensor (extrinsic Fabry-Perot interferometric type) with a lateral pressure-sensitive attachment.
  • Integration into a circumferential, micro-diameter sensor (2.08 mm distal, 0.99 mm mesial).
  • Calibration against a conventional catheter-type solid-state pressure sensor and in vivo testing.

Main Results:

  • Linear output current related to pressure (-3.0 x 10(4) to 3.0 x 10(4) N/m(2)).
  • Fast response times (12.2 ms decompression, 32.1 ms recompression), comparable to conventional sensors.
  • In vivo measurements showed similar waveforms to conventional sensors, detecting lateral and suction pressures during bolus transit.

Conclusions:

  • The micro optic pharyngeal manometric sensor is a viable tool for deglutition analysis.
  • It offers comparable performance to conventional sensors with a minimally invasive design.
  • The sensor can effectively detect pressures critical for understanding bolus transit in the pharynx.