The Experts below are selected from a list of 147 Experts worldwide ranked by ideXlab platform

Patrizia Moser - One of the best experts on this subject based on the ideXlab platform.

  • Testing of a new pneumatic device to cause pain in humans
    British journal of anaesthesia, 2004
    Co-Authors: Heinrich M. Schubert, Ingo H. Lorenz, Fritz Zschiegner, Christian Kremser, Matthias Hohlrieder, M. Biebl, Christian Kolbitsch, Patrizia Moser
    Abstract:

    Background Surgical pain typically combines superficial and deep pain. We wished to generate pain that resembled surgical pain, reliably and reproducibly, in volunteers. Methods We constructed a computer-controlled pneumatic device to Apply Pressure to the anterior tibia. The reproducibility of the pain was tested by rating the Pressure that caused pain rated 4–5 on a visual analogue scale (VAS) on days 0, 7, and 24 in 10 volunteers. The effect of remifentanil (0.025, 0.05, 0.075, and 0.1 μg kg−1 min−1) on pain tolerance in another set of volunteers (n=11) was used as an indirect measure of the reliability of pain production. Results The Pressure needed (0.7 (0.3) to 0.9 (0.4) atm (mean ( sd )) to induce pain rated 4–5 (VAS) did not vary, showing long-term reproducibility of the method. When Pressure was applied to cause increasing pain in volunteers (n=11) 0.05 μg kg−1 min−1 remifentanil increased pain tolerance by 50%. An approximate doubling of the dose (0.1 μg kg−1 min−1) increased pain tolerance significantly more. The linear logarithmic dose-effect relationship shows that the device causes pain reliably, and this can be reduced with opioid treatment. Conclusion This pneumatic device can Apply pain reliably and reproducibly.

F. Serra-mestres - One of the best experts on this subject based on the ideXlab platform.

  • The use of ferrofluids in micromechanics
    Sensors and Actuators A-physical, 2000
    Co-Authors: Raquel Perez-castillejos, José Antonio Plaza, Jaume Esteve, Pere Losantos, M.c. Acero, Carles Cané, F. Serra-mestres
    Abstract:

    An introduction to ferrofluids in MEMS applications is presented. Ferrofluids are fluids with magnetic properties. By Applying a magnetic field, the balance of forces within the ferrofluid is varied so that the magnetic fluid can move or Apply Pressure. These capabilities can be used in the field of the microsystems. In this work, we have obtained the typical values of Pressure which can be expected from a ferrofluid. Using a piezoresistive Pressure sensor, a Pressure of 0.04 bar has been obtained.

  • The use of ferrofluids in micromechanics
    Sensors and Actuators A: Physical, 2000
    Co-Authors: Raquel Perez-castillejos, José Antonio Plaza, Jaume Esteve, Pere Losantos, M.c. Acero, Carles Cané, F. Serra-mestres
    Abstract:

    An introduction to ferrofluids in MEMS applications is presented. Ferrofluids are fluids with magnetic properties. By Applying a magnetic field, the balance of forces within the ferrofluid is varied so that the magnetic fluid can move or Apply Pressure. These capabilities can be used in the field of the microsystems. In this work, we have obtained the typical values of Pressure which can be expected from a ferrofluid. Using a piezoresistive Pressure sensor, a Pressure of 0.04 bar has been obtained.Postprint (published version

Guillaume S Masson - One of the best experts on this subject based on the ideXlab platform.

  • visual perception modifies goal directed movement control supporting evidence from a visual perturbation paradigm
    Quarterly Journal of Experimental Psychology, 1997
    Co-Authors: Luc Proteau, Guillaume S Masson
    Abstract:

    It is well known that dynamic visual information influences movement control, whereas the role played by background visual information is still largely unknown. Evidence coming mainly from eye movement and manual tracking studies indicates that background visual information modifies motion perception and might influence movement control. The goal of the present study was to test this hypothesis. Subjects had to Apply Pressure on a strain gauge to displace in a single action a cursor shown on a video display and to immobilize it on a target shown on the same display. In some instances, the visual background against which the cursor moved was unexpectedly perturbed in a direction opposite to (Experiment 1), or in the same direction as (Experiment 2) the cursor controlled by the subject. The results of both experiments indicated that the introduction of a visual perturbation significantly affected aiming accuracy. These results suggest that background visual information is used to evaluate the velocity of th...

Heinrich M. Schubert - One of the best experts on this subject based on the ideXlab platform.

  • Testing of a new pneumatic device to cause pain in humans
    British journal of anaesthesia, 2004
    Co-Authors: Heinrich M. Schubert, Ingo H. Lorenz, Fritz Zschiegner, Christian Kremser, Matthias Hohlrieder, M. Biebl, Christian Kolbitsch, Patrizia Moser
    Abstract:

    Background Surgical pain typically combines superficial and deep pain. We wished to generate pain that resembled surgical pain, reliably and reproducibly, in volunteers. Methods We constructed a computer-controlled pneumatic device to Apply Pressure to the anterior tibia. The reproducibility of the pain was tested by rating the Pressure that caused pain rated 4–5 on a visual analogue scale (VAS) on days 0, 7, and 24 in 10 volunteers. The effect of remifentanil (0.025, 0.05, 0.075, and 0.1 μg kg−1 min−1) on pain tolerance in another set of volunteers (n=11) was used as an indirect measure of the reliability of pain production. Results The Pressure needed (0.7 (0.3) to 0.9 (0.4) atm (mean ( sd )) to induce pain rated 4–5 (VAS) did not vary, showing long-term reproducibility of the method. When Pressure was applied to cause increasing pain in volunteers (n=11) 0.05 μg kg−1 min−1 remifentanil increased pain tolerance by 50%. An approximate doubling of the dose (0.1 μg kg−1 min−1) increased pain tolerance significantly more. The linear logarithmic dose-effect relationship shows that the device causes pain reliably, and this can be reduced with opioid treatment. Conclusion This pneumatic device can Apply pain reliably and reproducibly.

Raquel Perez-castillejos - One of the best experts on this subject based on the ideXlab platform.

  • The use of ferrofluids in micromechanics
    Sensors and Actuators A-physical, 2000
    Co-Authors: Raquel Perez-castillejos, José Antonio Plaza, Jaume Esteve, Pere Losantos, M.c. Acero, Carles Cané, F. Serra-mestres
    Abstract:

    An introduction to ferrofluids in MEMS applications is presented. Ferrofluids are fluids with magnetic properties. By Applying a magnetic field, the balance of forces within the ferrofluid is varied so that the magnetic fluid can move or Apply Pressure. These capabilities can be used in the field of the microsystems. In this work, we have obtained the typical values of Pressure which can be expected from a ferrofluid. Using a piezoresistive Pressure sensor, a Pressure of 0.04 bar has been obtained.

  • The use of ferrofluids in micromechanics
    Sensors and Actuators A: Physical, 2000
    Co-Authors: Raquel Perez-castillejos, José Antonio Plaza, Jaume Esteve, Pere Losantos, M.c. Acero, Carles Cané, F. Serra-mestres
    Abstract:

    An introduction to ferrofluids in MEMS applications is presented. Ferrofluids are fluids with magnetic properties. By Applying a magnetic field, the balance of forces within the ferrofluid is varied so that the magnetic fluid can move or Apply Pressure. These capabilities can be used in the field of the microsystems. In this work, we have obtained the typical values of Pressure which can be expected from a ferrofluid. Using a piezoresistive Pressure sensor, a Pressure of 0.04 bar has been obtained.Postprint (published version