Design and its application of the f_n-ζchart capable of direct readout of the highest frequency indicating the limit of obtaining distortion-free waveforms

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概要

• 論文の詳細を見る

• We have already reported that the highest frequency (f_h) could serve as an index for evaluating the fidelity of pressure waveform derived via a catheter manometer system and be read off by the f_n-ζchart. F_h is determined by the natural frequency (f_n) and damping coefficient (ζ) in the frequency characteristics of the system. Inversely, f_h determines two pairs of f_n and ζin the f_n-ζchart, one in the case of ζ<0.7 and the another ζ>0.7. Then, each pair of f_n and ζdetermines respectively the resonant frequency (f_r) and its amplitude (A_r) (ζ<0.7), or the corner frequency (f_c) and its amplitude (A_c) (ζ>0.7) in the frequency characteristics. Thus, the point (f_r, A_r) or (f_c, A_c) represents the position of f_h projected in the frequency characteristics. Repeating the same operation for other f_n and ζcorresponding to the same f_h, yields the curve of f_h in the frequency characteristics. Calculations for other f_h's provide a group of curves. Frequency characteristics of pulmonary artery catheters were measured and overwritten thereupon, resulting in f_h's to be from 1.2 to 3.2 Hz. These results were in agreement with that calculated by the conventional method.

• 東海大学の論文

著者

• Suzuki Toshiyasu

  Department of Anesthesiology, Tokai University School of Medicine

• Saitoh Satoru

  Nippon Data Service Co. Ltd.

• Saitou Satoru

  Department Of Anesthesiology Tokai University School Of Medicine

• Saitoh Satoru

  Department Of Physical Therapy School Of Allied Medical Science Shinshu University

• Saitoh Satoru

  Department Of Orthopaedics Shinshu University School Of Medicine

• KANAZAWA Masahiro

  Department of Anesthesiology, Tokai University School of Medicine

• Kanazawa Masahiro

  Department Of Anesthesiology Tokai University School Of Medicine

• Kinefuchi Yoshio

  Department Of Biomedical Engineering Tokai University School Of High-technology For Human Welfare

• Kinefuchi Yoshio

  Department Of Anesthesiology School Of Medicine Tokai University

• Suzuki T

  Department Of Ophthalmology Tokai University School Of Medicine

• Shimada Masato

  Dept. Of Information And Mathematics Science Graduate School Of Science And Engineering Saitama Univ

• Shimada Masato

  Department Of Biomedical Engineering Tokai University School Of High-technology For Human Welfare

• FUKUYAMA Haruo

  Department of Anesthesiology, School of Medicine, Tokai University

• Suzuki Toshiyasu

  Dep. Of Anesthesiology Div. Of Basic Medical Sci. And Molecular Medicine Tokai Univ. School Of Medic

• Fukuyama H

  Department Of Anesthesiology Tokai University School Of Medicine

• Fukuyama Haruo

  Department Of Anesthesiology Tokai University School Of Medicine

• Suzuki Toshiyasu

  Department Of Anesthesiology Discipline Of Surgery Tokai University School Of Medicine

• Kanazawa Masahiro

  Dep. Of Anesthesiology Div. Of Basic Medical Sci. And Molecular Medicine Tokai Univ. School Of Medic

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