Jinko Zoki
Online ISSN : 1883-6097
Print ISSN : 0300-0818
ISSN-L : 0300-0818
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Volume 18, Issue 5
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1989 Volume 18 Issue 5 Pages 1527
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1527
    JOURNAL FREE ACCESS
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  • Erythropoietin
    S. KOSHIKAWA
    1989 Volume 18 Issue 5 Pages 1529-1538
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1529
    JOURNAL FREE ACCESS
    Download PDF (1655K)
  • Active Oxygen Radical in Artificial Organs
    T SANAKA, M NISHIKAWA, N SUGINO, K OTA
    1989 Volume 18 Issue 5 Pages 1539-1546
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1539
    JOURNAL FREE ACCESS
    Download PDF (1065K)
  • Existing Total Hip Prostesis and Its Prospect
    Y KUROKI
    1989 Volume 18 Issue 5 Pages 1547-1553
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1547
    JOURNAL FREE ACCESS
    Download PDF (8765K)
  • Control of Hyperphosphatemia in Dialysis Patients
    S INOUE, O INAGAKI, H MORI, Y FUJITA
    1989 Volume 18 Issue 5 Pages 1554-1562
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1554
    JOURNAL FREE ACCESS
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  • Theoretical and experimental study of the balloon performance during IABP, with special reference to the usefulness of transthoracic electrical impedance
    A SEKI, J AKUNE
    1989 Volume 18 Issue 5 Pages 1563-1572
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1563
    JOURNAL FREE ACCESS
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    It is reasonable to deduce that the subtraction of transthoracic electrical impedance, ΔZB(t), defined by the following equation, is due to inflation of an intra-aortic balloon: ΔZB(t)=Z2(t)-Z1(t), where Z2 and Z1 are the impedance during inflation of the balloon and during the preceding diastolic phase without balloon inflation respectively. Assuming that the aorta is compatible with a Windkessel model and that the shape of the inflated balloon is cylindrical, the balloon volume (VB(t)) can be expressed approximately as the following equation: VB(t)≅(Ls/L){C(t)·ΔP(t)+ρ(L/Z0)2·ΔZB(t)}, where Ls is the length of the intra-aortic balloon, L is the distance between two inner electrodes, ρ is the electrical resistivity of blood, Z0 is the mean transthoracic impedance, C (t) is compliance of the aorta, and ΔP (t) is the increase in aortic pressure induced by balloon inflation respectively. Based on this theory, the authors developed a new device, “IABP MONITOR MODEL-1”, which had the function for the prompt and precise measurement of ΔZB (t) and ΔP (t). As a result, the change with time in actual balloon volume could be shown, and the difference of balloon performance between 2 types of IABP devices could be detected.
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  • Non-invasive monitoring of tissue oxygen metabolism by NIR laser spectrophotometry
    toward for clinical application
    M TAMURA, M ISHIKI, H TACHIBANA, Y KUBO, T TAMURA
    1989 Volume 18 Issue 5 Pages 1573-1580
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1573
    JOURNAL FREE ACCESS
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    Using a near infrared (NIR) spectrophotometry, brain oxygen metabolism was noninvasively studied by simultaneous measurement of oxygenated homoglobin (Hb), reduced Hb, and total Hb content in rat and human brain in situ. The computer-controlled spectrometer was built whereby NIR light from three lacer diodes (wavelengths 780, 805, and 830nm) could be illuminated on the head through a fiber-optic bundle. The transmitted or reflected light was guided into a photomultiplier tube operating in photon counting mode through another fiber bundle. The change of oxygenated and total Hb content was monitored using the following equations of -3ΔA805+3ΔA830 and 1.6ΔA780-5.8ΔA805+4.2ΔA830 respectively (ΔA780, ΔA805, ΔA830 were absorption change at wavelength 780, 805 and 830nm). With anesthetized and artificially ventilated rats, about 90% of brain Hb was in oxygenated state at 95% O2+5% CO2 in the inspired gas and 50% at 7% O22+5% CO2, which correlated well with oxygen satulation of the jugular vein blood. Brain oxygenation was continuously monitored in the cardiopulmonary bypass (CPB) patients in reflectance mode. The blood volume tended to increase during later phase of CPB but mostly returned to pre-CPB level when patient's hemodynamics became stable after CPB discontinued. During CPB the Hb oxygenation level was kept roughly constant at mean perfusion pressure over 60mmHg, whereas below 40mmHg the decrease in oxygenated Hb was observed. NIR spectrophotometry provides valuable informations for the proper management of CPB patients.
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  • [title in Japanese]
    [in Japanese]
    1989 Volume 18 Issue 5 Pages 1581
    Published: October 15, 1989
    Released on J-STAGE: October 07, 2011
    DOIhttps://doi.org/10.11392/jsao1972.18.1581
    JOURNAL FREE ACCESS
    Download PDF (169K)
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