The Experts below are selected from a list of 810714 Experts worldwide ranked by ideXlab platform

Timothy M. Mcculloch - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry
    Dysphagia, 2018
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position ( P   45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry.
    Dysphagia, 2017
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position (P   90° compared to upright and 45°. Mechanisms of deglutition may differ with position and relative direction of gravity, particularly when at > 45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.

Baojun Bai - One of the best experts on this subject based on the ideXlab platform.

  • Flow patterns of oil–water two-phase flow during Pressure-Driven Process in nanoscale fluidic chips
    Microfluidics and Nanofluidics, 2018
    Co-Authors: Songyuan Liu, Baojun Bai
    Abstract:

    Unconventional oil reservoirs have great potential to become significant sources of petroleum production in the future. Many shale oil systems consist of nanoscale pores and fractures that are significantly smaller than those from conventional reservoirs, and pore sizes are only slightly more than one order of magnitude of those of the saturating fluid molecules. This difference will cause abnormal wettability effect and typical fluid flow mechanisms in unconventional oil systems. Therefore, it is increasingly important to investigate fluid flow behaviours in nanoscale porous media. In this work, a lab-on-chip approach for the direct visualization of the water–oil flow in nanoscale channels was developed by using an advanced laser microscopy system combined with a nanofluidic chip. For the micro-scale study of interface transmission during the drainage and imbibition Processes, parallel linear nanofluidic chips were used. A comprehensive study of water–oil flow behaviours is presented. During the drainage Process, liquids tend to have a piston-like flow in nanoscale channels; both residual phase saturation and configuration affect the flow behaviour on such small scale; during the imbibition Process, a fading-out phenomenon was observed. For a macroscale study of pressure and recovery relationships, unusual entrance pressure was discovered by using network nanofluidic chips comparing to conventional results.

  • Flow Patterns of Oil-Water Two-Phase Flow during Pressure-Driven Process in Nanoscale Fluidic Chips
    Microfluidics and Nanofluidics, 2018
    Co-Authors: Songyuan Liu, Baojun Bai
    Abstract:

    Unconventional oil reservoirs have great potential to become significant sources of petroleum production in the future. Many shale oil systems consist of nanoscale pores and fractures that are significantly smaller than those from conventional reservoirs, and pore sizes are only slightly more than one order of magnitude of those of the saturating fluid molecules. This difference will cause abnormal wettability effect and typical fluid flow mechanisms in unconventional oil systems. Therefore, it is increasingly important to investigate fluid flow behaviours in nanoscale porous media. In this work, a lab-on-chip approach for the direct visualization of the water–oil flow in nanoscale channels was developed by using an advanced laser microscopy system combined with a nanofluidic chip. For the micro-scale study of interface transmission during the drainage and imbibition Processes, parallel linear nanofluidic chips were used. A comprehensive study of water–oil flow behaviours is presented. During the drainage Process, liquids tend to have a piston-like flow in nanoscale channels; both residual phase saturation and configuration affect the flow behaviour on such small scale; during the imbibition Process, a fading-out phenomenon was observed. For a macroscale study of pressure and recovery relationships, unusual entrance pressure was discovered by using network nanofluidic chips comparing to conventional results.

Sarah P. Rosen - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry
    Dysphagia, 2018
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position ( P   45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry.
    Dysphagia, 2017
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position (P   90° compared to upright and 45°. Mechanisms of deglutition may differ with position and relative direction of gravity, particularly when at > 45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.

Songyuan Liu - One of the best experts on this subject based on the ideXlab platform.

  • Flow patterns of oil–water two-phase flow during Pressure-Driven Process in nanoscale fluidic chips
    Microfluidics and Nanofluidics, 2018
    Co-Authors: Songyuan Liu, Baojun Bai
    Abstract:

    Unconventional oil reservoirs have great potential to become significant sources of petroleum production in the future. Many shale oil systems consist of nanoscale pores and fractures that are significantly smaller than those from conventional reservoirs, and pore sizes are only slightly more than one order of magnitude of those of the saturating fluid molecules. This difference will cause abnormal wettability effect and typical fluid flow mechanisms in unconventional oil systems. Therefore, it is increasingly important to investigate fluid flow behaviours in nanoscale porous media. In this work, a lab-on-chip approach for the direct visualization of the water–oil flow in nanoscale channels was developed by using an advanced laser microscopy system combined with a nanofluidic chip. For the micro-scale study of interface transmission during the drainage and imbibition Processes, parallel linear nanofluidic chips were used. A comprehensive study of water–oil flow behaviours is presented. During the drainage Process, liquids tend to have a piston-like flow in nanoscale channels; both residual phase saturation and configuration affect the flow behaviour on such small scale; during the imbibition Process, a fading-out phenomenon was observed. For a macroscale study of pressure and recovery relationships, unusual entrance pressure was discovered by using network nanofluidic chips comparing to conventional results.

  • Flow Patterns of Oil-Water Two-Phase Flow during Pressure-Driven Process in Nanoscale Fluidic Chips
    Microfluidics and Nanofluidics, 2018
    Co-Authors: Songyuan Liu, Baojun Bai
    Abstract:

    Unconventional oil reservoirs have great potential to become significant sources of petroleum production in the future. Many shale oil systems consist of nanoscale pores and fractures that are significantly smaller than those from conventional reservoirs, and pore sizes are only slightly more than one order of magnitude of those of the saturating fluid molecules. This difference will cause abnormal wettability effect and typical fluid flow mechanisms in unconventional oil systems. Therefore, it is increasingly important to investigate fluid flow behaviours in nanoscale porous media. In this work, a lab-on-chip approach for the direct visualization of the water–oil flow in nanoscale channels was developed by using an advanced laser microscopy system combined with a nanofluidic chip. For the micro-scale study of interface transmission during the drainage and imbibition Processes, parallel linear nanofluidic chips were used. A comprehensive study of water–oil flow behaviours is presented. During the drainage Process, liquids tend to have a piston-like flow in nanoscale channels; both residual phase saturation and configuration affect the flow behaviour on such small scale; during the imbibition Process, a fading-out phenomenon was observed. For a macroscale study of pressure and recovery relationships, unusual entrance pressure was discovered by using network nanofluidic chips comparing to conventional results.

Suzan M. Abdelhalim - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry
    Dysphagia, 2018
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position ( P   45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.

  • Effect of Body Position on Pharyngeal Swallowing Pressures Using High-Resolution Manometry.
    Dysphagia, 2017
    Co-Authors: Sarah P. Rosen, Suzan M. Abdelhalim, Corinne A. Jones, Timothy M. Mcculloch
    Abstract:

    The effect of body position and gravitational pull on the complex Pressure-Driven Process of pharyngeal swallowing remains unknown. Using high-resolution manometry (HRM), this study aims to identify positional adaptations of pharyngeal physiology by evaluating swallowing pressure patterns in a series of inverted body positions. Ten healthy adults each underwent swallowing tasks with pharyngeal HRM at six body positions using an inversion table (0°[upright], 45°, 90°[supine], 110°, 135°, and 180°[fully inverted]). Repeated measures ANOVA was used to assess impact of position on pressure parameters, and pharyngeal-UES pressure gradients translate. Velopharyngeal pressures varied by position (P   90° compared to upright and 45°. Mechanisms of deglutition may differ with position and relative direction of gravity, particularly when at > 45° inclination. Increased palatal pressure is generated in the upside-down position to achieve nasopharyngeal closure and prevent regurgitation. While other classically measured pressures may not consistently differ with positioning, many individuals exhibit adaptations in pressure gradients when inverted, likely due to a combination of changes in pharyngeal driving force and UES opening mechanisms. Identification of these changes, relative to position, further builds on our understanding of the adaptability of the pharyngeal swallowing system.