Results 171 to 180 of about 179,748 (217)
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Differential impedance plethysmography for measuring thoracic impedances
Medical & Biological Engineering & Computing, 1982A critical evaluation of the measurement of the transthoracic basic impedance Zo according to Kubicek's method revealed inhomogeneous electrical field-distributions in the region of the neck and the shoulders and in the region of the mammae in female subjects. These inhornogeneties were found to introduce uncontrollable errors, like position dependency
J H, Meijer +5 more
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Impedance pneumography: Noise as signal in impedance cardiography
Psychophysiology, 1999Thoracic impedance is modulated by events within the respiratory cycle, which represents a source of “noise” in impedance cardiography. Respiration itself, however, is a physiological rhythm of interest to psychophysiologists. We report here methods and validation for deriving impedance pneumographic measures of respiration from impedance cardiography ...
J M, Ernst +4 more
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Audiology and Neurotology
Background: Accurate intracochlear positioning of electrode arrays is critical for optimizing auditory outcomes during cochlear implantation (CI). While radiographic imaging remains the standard for postoperative evaluation, transimpedance matrix (TIM) measurements have emerged as a promising intraoperative technique for real-time assessment of ...
Alhassan, Algazlan +5 more
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Background: Accurate intracochlear positioning of electrode arrays is critical for optimizing auditory outcomes during cochlear implantation (CI). While radiographic imaging remains the standard for postoperative evaluation, transimpedance matrix (TIM) measurements have emerged as a promising intraoperative technique for real-time assessment of ...
Alhassan, Algazlan +5 more
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Nature Methods, 2011
A label-free microscopy technique based on electrochemical impedance offers a new way of studying electrochemical processes in single cells.
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A label-free microscopy technique based on electrochemical impedance offers a new way of studying electrochemical processes in single cells.
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Electrical Impedance Tomography
Current Opinion in Critical Care, 2009Electrical impedance tomography (EIT) is a noninvasive, radiation-free monitoring tool that allows real-time imaging of ventilation. The purpose of this article is to discuss the fundamentals of EIT and to review the use of EIT in critical care patients.In addition to its established role in describing the distribution of alveolar ventilation, EIT has ...
Eduardo L V, Costa +2 more
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Impedance Planimetry: Clinical Impedance Planimetry
2006Rectal dynamics traditionally have been assessed using the construct of “rectal compliance” measurement, assessing the change in volume with changes in rectal pressure. Various studies have reported “normal control” results over a wide range of measurements (1–7), reflecting the relative lack of reproducibility of the technique where there are ...
Gardiner, Angela B., Duthie, Graeme S.
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Archives of Otolaryngology - Head and Neck Surgery, 1971
D L, McPherson, J, Jerger
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D L, McPherson, J, Jerger
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Definition of Impedance and Impedance of Electrical Circuits
2013To understand the impedance of electrochemical objects, it is necessary to understand the behavior of simple electrical circuits, first in steady state, then in transient conditions. Such circuits contain simple linear electrical elements: resistance, capacitance, and inductance. Then the concept of electrical impedance will be introduced.
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SEG Technical Program Expanded Abstracts 2002, 2001
L.T. Santos, M. Tygel, A.C.B. Ramos
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L.T. Santos, M. Tygel, A.C.B. Ramos
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