Detection of apneic events from single channel nasal airflow using 2nd derivative method

2008 ◽  
Vol 91 (3) ◽  
pp. 199-207 ◽  
Author(s):  
Jonghee Han ◽  
Hong-Beom Shin ◽  
Do-Un Jeong ◽  
Kwang Suk Park
Keyword(s):  
Single Channel ◽  
Nasal Airflow ◽  
Derivative Method

scholarly journals Feasibility of Noninvasive Single-Channel Automated Differentiation of Obstructive and Central Hypopneas with Nasal Airflow

Respiration ◽  
2013 ◽  
Vol 85 (4) ◽  
pp. 312-318 ◽  
Author(s):  
C. Morgenstern ◽  
W.J. Randerath ◽  
M. Schwaibold ◽  
A. Bolz ◽  
R. Jané
Keyword(s):  
Single Channel ◽  
Nasal Airflow

scholarly journals The Role of Single-Channel Nasal Airflow Pressure Transducer in the Diagnosis of OSA in the Sleep Laboratory

2010 ◽  
Vol 06 (04) ◽  
pp. 349-356 ◽  
Author(s):  
Lydia Makarie Rofail ◽  
Keith K. H. Wong ◽  
Gunnar Unger ◽  
Guy B. Marks ◽  
Ronald R. Grunstein
Keyword(s):  
Pressure Transducer ◽  
Single Channel ◽  
Sleep Laboratory ◽  
Nasal Airflow

scholarly journals Comparison between a Single-Channel Nasal Airflow Device and Oximetry for the Diagnosis of Obstructive Sleep Apnea

SLEEP ◽  
2010 ◽  
Vol 33 (8) ◽  
pp. 1106-1114 ◽  
Author(s):  
Lydia Makarie Rofail ◽  
Keith K.H. Wong ◽  
Gunnar Unger ◽  
Guy B. Marks ◽  
Ronald R. Grunstein
Keyword(s):  
Obstructive Sleep Apnea ◽  
Sleep Apnea ◽  
Single Channel ◽  
Nasal Airflow ◽  
Obstructive Sleep

scholarly journals The Utility of Single-Channel Nasal Airflow Pressure Transducer in the Diagnosis Of OSA at Home

SLEEP ◽  
2010 ◽  
Vol 33 (8) ◽  
pp. 1097-1105 ◽  
Author(s):  
Lydia Makarie Rofail ◽  
Keith K.H. Wong ◽  
Gunnar Unger ◽  
Guy B. Marks ◽  
Ronald R. Grunstein
Keyword(s):  
Pressure Transducer ◽  
Single Channel ◽  
Nasal Airflow ◽  
At Home

Data Acquisition and Handling Unit for a Quantitative Use of Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 232-233 ◽  
Author(s):  
P. Trebbia ◽  
P. Ballongue ◽  
C. Colliex
Keyword(s):  
Electron Microscope ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Single Channel ◽  
Detection System ◽  
Surface Barrier ◽  
Solid State Detector ◽  
Electrostatic Mirror ◽  
Electron Energy Loss

An effective use of electron energy loss spectroscopy for chemical characterization of selected areas in the electron microscope can only be achieved with the development of quantitative measurements capabilities.The experimental assembly, which is sketched in Fig.l, has therefore been carried out. It comprises four main elements.The analytical transmission electron microscope is a conventional microscope fitted with a Castaing and Henry dispersive unit (magnetic prism and electrostatic mirror). Recent modifications include the improvement of the vacuum in the specimen chamber (below 10-6 torr) and the adaptation of a new electrostatic mirror.The detection system, similar to the one described by Hermann et al (1), is located in a separate chamber below the fluorescent screen which visualizes the energy loss spectrum. Variable apertures select the electrons, which have lost an energy AE within an energy window smaller than 1 eV, in front of a surface barrier solid state detector RTC BPY 52 100 S.Q. The saw tooth signal delivered by a charge sensitive preamplifier (decay time of 5.10-5 S) is amplified, shaped into a gaussian profile through an active filter and counted by a single channel analyser.

Instrumentation for Measurement of Lingual Strength

1968 ◽  
Vol 11 (1) ◽  
pp. 189-193 ◽  
Author(s):  
Lois Joan Sanders
Keyword(s):  
Single Channel ◽  
Displacement Transducer ◽  
Tongue Pressure ◽  
Maximum Pressure ◽  
Research Use ◽  
Direct Writing ◽  
Significant Difference ◽  
Pressure Unit ◽  
Force Displacement ◽  
Consistent Response

A tongue pressure unit for measurement of lingual strength and patterns of tongue pressure is described. It consists of a force displacement transducer, a single channel, direct writing recording system, and a specially designed tongue pressure disk, head stabilizer, and pressure unit holder. Calibration with known weights indicated an essentially linear and consistent response. An evaluation of subject reliability in which 17 young adults were tested on two occasions revealed no significant difference in maximum pressure exerted during the two test trials. Suggestions for clinical and research use of the instrumentation are noted.

The Development of Swallowing Respiratory Coordination

2009 ◽  
Vol 18 (1) ◽  
pp. 19-24
Author(s):  
Maggie-Lee Huckabee
Keyword(s):  
Cortical Activation ◽  
First Year ◽  
Healthy Children ◽  
Nasal Airflow ◽  
Single Session ◽  
Primary Finding ◽  
Patterns Of Behavior ◽  
Cortical Modulation ◽  
First Year Of Life ◽  
Swallowing Apnea

Abstract Research exists that evaluates the mechanics of swallowing respiratory coordination in healthy children and adults as well and individuals with swallowing impairment. The research program summarized in this article represents a systematic examination of swallowing respiratory coordination across the lifespan as a means of behaviorally investigating mechanisms of cortical modulation. Using time-locked recordings of submental surface electromyography, nasal airflow, and thyroid acoustics, three conditions of swallowing were evaluated in 20 adults in a single session and 10 infants in 10 sessions across the first year of life. The three swallowing conditions were selected to represent a continuum of volitional through nonvolitional swallowing control on the basis of a decreasing level of cortical activation. Our primary finding is that, across the lifespan, brainstem control strongly dictates the duration of swallowing apnea and is heavily involved in organizing the integration of swallowing and respiration, even in very early infancy. However, there is evidence that cortical modulation increases across the first 12 months of life to approximate more adult-like patterns of behavior. This modulation influences primarily conditions of volitional swallowing; sleep and naïve swallows appear to not be easily adapted by cortical regulation. Thus, it is attention, not arousal that engages cortical mechanisms.

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