The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform

Ingrid Nygaard - One of the best experts on this subject based on the ideXlab platform.

  • Development of a novel intra-abdominal Pressure Transducer for large scale clinical studies
    Biomedical Microdevices, 2017
    Co-Authors: Stefan Niederauer, Ingrid Nygaard, Johanna De Gennaro, Tomasz Petelenz, Robert Hitchcock
    Abstract:

    Intra-abdominal Pressure may be one of the few modifiable risk factors associated with developing a pelvic floor disorder. With one in eight women having surgery to correct a pelvic floor disorder in their lifetimes, intra-abdominal Pressure may be a key to understanding the disease etiology and how to mitigate its occurrence and progression. Many traditional methods of intra-abdominal Pressure measurement have limitations in data quality, environment of use, and patient comfort. We have modified a previously reported intravaginal Pressure Transducer that has been shown to overcome other intra-abdominal Pressure measurement technique limitations (Coleman et al. 2012 ). Our modifications to the intravaginal Pressure Transducer make it easier to use, less costly, and more reliable than previous designs, while maintaining accuracy, integrity, and quality of data. This device has been used in over 400 participants to date as part of one of the most comprehensive studies examining the relationship between intra-abdominal Pressure and pelvic floor disorders.

  • intra abdominal Pressures during activity in women using an intra vaginal Pressure Transducer
    Journal of Sports Sciences, 2014
    Co-Authors: Janet M Shaw, Tanner J Coleman, Robert Hitchcock, Nadia M Hamad, Marlene J Egger, Ingrid Nygaard
    Abstract:

    AbstractStrenuous physical activity has been linked to pelvic floor disorders in women. Using a novel wireless intra-vaginal Pressure Transducer, intra-abdominal Pressure was measured during diverse activities in a laboratory. Fifty-seven women performed a prescribed protocol using the intra-vaginal Pressure Transducer. We calculated maximal, area under the curve and first moment of the area intra-abdominal Pressure for each activity. Planned comparisons of Pressure were made between levels of walking and cycling and between activities with reported high Pressure in the literature. Findings indicate variability in intra-abdominal Pressure amongst individuals doing the same activity, especially in activities that required regulation of effort. There were statistically significant differences in maximal Pressure between levels of walking, cycling and high Pressure activities. Results for area under the curve and first moment of the area were not always consistent with maximal Pressure. Coughing had the high...

  • clinical evaluation of a wireless intra vaginal Pressure Transducer
    International Urogynecology Journal, 2012
    Co-Authors: Tanner J Coleman, Robert Hitchcock, Kristina Heintz, Janet M Shaw, Ingrid Nygaard
    Abstract:

    Objective To describe the development, feasibility and validity of a wireless intra-vaginal Pressure Transducer (IVT) which can be used to measure intra-abdominal Pressure in real-world settings.

K. Rajanna - One of the best experts on this subject based on the ideXlab platform.

  • Pressure Transducer with Au-Ni thin-film strain gauges
    IEEE Transactions on Electron Devices, 1993
    Co-Authors: K. Rajanna, M. M. Nayak, Sangeneni Mohan, N. Gunasekaran, A.e. Muthunayagam
    Abstract:

    The behavior of a Pressure Transducer with Au-Ni (89:11) film as strain gauges has been studied. The effects of postdeposition heat treatment on the resistance of the thin-film strain gauges and hence the output performance of the Pressure Transducer are discussed. The effect of a repeated number of Pressure cycles carried out over a period of eight months has also been reported. The maximum nonlinearity and the hysteresis is improved from 0.92% FSO to 0.06% FSO after 1000 Pressure cycles. The output behavior of the Pressure Transducer with temperature has also been studied.

  • Performance study of a Pressure Transducer with meandering-path thin film strain gauges
    Thin Solid Films, 1990
    Co-Authors: M. M. Nayak, K. Rajanna, Sangeneni Mohan
    Abstract:

    Abstract The performance of a Pressure Transducer with meandering-path thin film strain gauges has been studied. Details of the procedure followed to prepare the thin film strain gauge system on the Pressure Transducer diaphragm are given. The effect of post-deposition heat treatment on the resistance of the sensing films of the strain gauges and the insulating base layers are discussed. The output of the Pressure Transducer was studied with various input Pressures and excitation voltages. It was found that up to a maximum of 10 V bridge excitation the output was stable and repetitive. The maximum non-linearity and hysteresis observed are ±0.15%, ±0.16% and ±0.14% FSO (full-scale output) for 5, 7.5 and 10 V excitation respectively. Information on the output behaviour of the Pressure Transducer with temperature is also included.

  • Thin-film Pressure Transducer with manganese film as the strain gauge
    Sensors and Actuators A-physical, 1990
    Co-Authors: K. Rajanna, M. M. Nayak, Sangeneni Mohan, N. Gunasekaran
    Abstract:

    The performance of a thin-film Pressure Transducer with manganese film as the strain gauge is presented. The construction details of the Pressure Transducer diaphragm assembly are given. The process of depositing the insulating layers, sensing film, bonding pads, the protective overlayer, film stabilization and other related aspects are also described. Results on the output characteristics of the Pressure Transducer are reported.

A.e. Muthunayagam - One of the best experts on this subject based on the ideXlab platform.

  • Pressure Transducer with Au-Ni thin-film strain gauges
    IEEE Transactions on Electron Devices, 1993
    Co-Authors: K. Rajanna, M. M. Nayak, Sangeneni Mohan, N. Gunasekaran, A.e. Muthunayagam
    Abstract:

    The behavior of a Pressure Transducer with Au-Ni (89:11) film as strain gauges has been studied. The effects of postdeposition heat treatment on the resistance of the thin-film strain gauges and hence the output performance of the Pressure Transducer are discussed. The effect of a repeated number of Pressure cycles carried out over a period of eight months has also been reported. The maximum nonlinearity and the hysteresis is improved from 0.92% FSO to 0.06% FSO after 1000 Pressure cycles. The output behavior of the Pressure Transducer with temperature has also been studied.

Sangeneni Mohan - One of the best experts on this subject based on the ideXlab platform.

  • Pressure Transducer with Au-Ni thin-film strain gauges
    IEEE Transactions on Electron Devices, 1993
    Co-Authors: K. Rajanna, M. M. Nayak, Sangeneni Mohan, N. Gunasekaran, A.e. Muthunayagam
    Abstract:

    The behavior of a Pressure Transducer with Au-Ni (89:11) film as strain gauges has been studied. The effects of postdeposition heat treatment on the resistance of the thin-film strain gauges and hence the output performance of the Pressure Transducer are discussed. The effect of a repeated number of Pressure cycles carried out over a period of eight months has also been reported. The maximum nonlinearity and the hysteresis is improved from 0.92% FSO to 0.06% FSO after 1000 Pressure cycles. The output behavior of the Pressure Transducer with temperature has also been studied.

  • Performance study of a Pressure Transducer with meandering-path thin film strain gauges
    Thin Solid Films, 1990
    Co-Authors: M. M. Nayak, K. Rajanna, Sangeneni Mohan
    Abstract:

    Abstract The performance of a Pressure Transducer with meandering-path thin film strain gauges has been studied. Details of the procedure followed to prepare the thin film strain gauge system on the Pressure Transducer diaphragm are given. The effect of post-deposition heat treatment on the resistance of the sensing films of the strain gauges and the insulating base layers are discussed. The output of the Pressure Transducer was studied with various input Pressures and excitation voltages. It was found that up to a maximum of 10 V bridge excitation the output was stable and repetitive. The maximum non-linearity and hysteresis observed are ±0.15%, ±0.16% and ±0.14% FSO (full-scale output) for 5, 7.5 and 10 V excitation respectively. Information on the output behaviour of the Pressure Transducer with temperature is also included.

  • Thin-film Pressure Transducer with manganese film as the strain gauge
    Sensors and Actuators A-physical, 1990
    Co-Authors: K. Rajanna, M. M. Nayak, Sangeneni Mohan, N. Gunasekaran
    Abstract:

    The performance of a thin-film Pressure Transducer with manganese film as the strain gauge is presented. The construction details of the Pressure Transducer diaphragm assembly are given. The process of depositing the insulating layers, sensing film, bonding pads, the protective overlayer, film stabilization and other related aspects are also described. Results on the output characteristics of the Pressure Transducer are reported.

Robert Hitchcock - One of the best experts on this subject based on the ideXlab platform.

  • Development of a novel intra-abdominal Pressure Transducer for large scale clinical studies
    Biomedical Microdevices, 2017
    Co-Authors: Stefan Niederauer, Ingrid Nygaard, Johanna De Gennaro, Tomasz Petelenz, Robert Hitchcock
    Abstract:

    Intra-abdominal Pressure may be one of the few modifiable risk factors associated with developing a pelvic floor disorder. With one in eight women having surgery to correct a pelvic floor disorder in their lifetimes, intra-abdominal Pressure may be a key to understanding the disease etiology and how to mitigate its occurrence and progression. Many traditional methods of intra-abdominal Pressure measurement have limitations in data quality, environment of use, and patient comfort. We have modified a previously reported intravaginal Pressure Transducer that has been shown to overcome other intra-abdominal Pressure measurement technique limitations (Coleman et al. 2012 ). Our modifications to the intravaginal Pressure Transducer make it easier to use, less costly, and more reliable than previous designs, while maintaining accuracy, integrity, and quality of data. This device has been used in over 400 participants to date as part of one of the most comprehensive studies examining the relationship between intra-abdominal Pressure and pelvic floor disorders.

  • intra abdominal Pressures during activity in women using an intra vaginal Pressure Transducer
    Journal of Sports Sciences, 2014
    Co-Authors: Janet M Shaw, Tanner J Coleman, Robert Hitchcock, Nadia M Hamad, Marlene J Egger, Ingrid Nygaard
    Abstract:

    AbstractStrenuous physical activity has been linked to pelvic floor disorders in women. Using a novel wireless intra-vaginal Pressure Transducer, intra-abdominal Pressure was measured during diverse activities in a laboratory. Fifty-seven women performed a prescribed protocol using the intra-vaginal Pressure Transducer. We calculated maximal, area under the curve and first moment of the area intra-abdominal Pressure for each activity. Planned comparisons of Pressure were made between levels of walking and cycling and between activities with reported high Pressure in the literature. Findings indicate variability in intra-abdominal Pressure amongst individuals doing the same activity, especially in activities that required regulation of effort. There were statistically significant differences in maximal Pressure between levels of walking, cycling and high Pressure activities. Results for area under the curve and first moment of the area were not always consistent with maximal Pressure. Coughing had the high...

  • clinical evaluation of a wireless intra vaginal Pressure Transducer
    International Urogynecology Journal, 2012
    Co-Authors: Tanner J Coleman, Robert Hitchcock, Kristina Heintz, Janet M Shaw, Ingrid Nygaard
    Abstract:

    Objective To describe the development, feasibility and validity of a wireless intra-vaginal Pressure Transducer (IVT) which can be used to measure intra-abdominal Pressure in real-world settings.