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  • 1
    Electronic Resource
    Electronic Resource
    Induction of hepatic microsomal enzymes by Aroclor® 1254 inIctalurus punctatus (channel catfish) (1976)
    Springer
    Bulletin of environmental contamination and toxicology 16 (1976), S. 495-502 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01686169
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The changes in blood resistivity with haematocrit and temperature (1975)
    Springer
    Intensive care medicine 1 (1975), S. 153-162 
    Details
    ISSN: 1432-1238
    Keywords: Blood resistivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The temperature dependence of the resistivity of blood samples with haematocrits from 16 to 52.5% has been investigated over the temperature range of 22° to 40 °C at a frequency of 100 kHz. The resistivity of whole blood increased with an increase in haematocrit and a decrease in temperature. The data fitted the relationship: Pohm-cm = (6272 Hct + 75.176) − (0.104 Hct + 1.467) tC where Hct is the percentage haematocrit.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00624433
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A comparison of two methods for the computer analysis of arterial blood pressure waveforms (1975)
    Springer
    Intensive care medicine 1 (1975), S. 125-128 
    Details
    ISSN: 1432-1238
    Keywords: Arterial blood pressure ; pre-processor ; patient monitoring ; digital computer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Two different methods, one analogue and one digital, for the analysis of the arterial blood pressure waveform are described and compared. Little difference was found in the systolic and diastolic pressures determined by the two methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571659
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The effect of respiration on the monitoring of stroke volume and cardiac output by the electrical impedance technique (1976)
    Springer
    Intensive care medicine 2 (1976), S. 3-6 
    Details
    ISSN: 1432-1238
    Keywords: Impedance cardiogram ; Cardiac output ; Stroke volume ; Averaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In six volunteers (5 male, 1 female) it has been shown that normal respiration made no statistical difference to the estimates of the mean stroke volume and the mean cardiac output as determined by the electrical impedance method of Kubiceket al, (1966). The coefficient of variation was usually increased by respiration. The use of those stroke volumes which occur only at end-expiration was not shown to yield a greater reproducibility with 3 other male volunteers. In the female subject it was found that the use of a digital averager triggered from the preceding R-wave of the ECG gave values for the mean stroke volume and cardiac output which were always lower than the conventional mean values obtained from a number of strokes. The expense of either of these approaches does not appear to be justified as a means of compensating for the effects of normal respiration on the impedance dZ/dt waveform.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00571889
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of a progressive decrease in the circulating blood volume of the dog on the transthoracic impedance (1976)
    Springer
    Intensive care medicine 2 (1976), S. 119-124 
    Details
    ISSN: 1432-1238
    Keywords: Thoracic impedance ; Haemorrhage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The correlations between the haemodynamic and transthoracic electrical impedance changes resulting from a progressive reduction in the circulating blood volume were studied in four intact mongrel dogs artificially ventilated with a mixture of halothane in nitrous oxide-oxygen. The cardiac output of the dogs was measured by both the electrical impedance and the fibre optic dye dilution techniques. It was found that significant correlations existed between the blood loss and the arterial blood pressure, the maximum first derivative of the transthoracic impedance, the Heather Index, the transthoracic impedance, the maximum rate of change of aortic pressure and the cardiac stroke work. There was also a good correlation between the dye and impedance cardiac output values, the impedance value always being higher than the corresponding dye value. The correlation between the Heather Index and the PEP/LVET ratio and 1 /PEP2 varied markedly from dog to dog.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00579692
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The effect of haematocrit on the resistivity of human blood at 37°C and 100 kHz (1975)
    Springer
    Medical & biological engineering & computing 13 (1975), S. 182-186 
    Details
    ISSN: 1741-0444
    Keywords: Blood resistivity ; Electrical impedance ; Cardiac output
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire Pour pouvoir appliquer la méthode de l'impédance électrique pour la mesure du débit sanguin chez des patients à l'hémodialyse où l'on peut rencontrer use vaste gamme d'hématocrites, il est nécessaire d'avoir des connaissances sur la relation entre la résistivité et l'hématocrite du sang. Une relation linéaire optimale a été déterminée pour le sang humain à 37°C et 100 kHz sur la gamme d'hématocrites de 14 à 45%.
    Abstract: Zusammenfassung Um die elektrische Impedanzmethode zur Messung der Herzleistung bei Patienten anwenden zu können, die durch Blutidialyse behandelt werden, wo ein breiterer Bereich von Blutzentrifugenwerten angetroffen werden kann, ist die Kenntnis des Verhältnisses zwischen dem spezifischen Widerstand des Blutes und dem Blutzentrifugenwert enforderlich. Es wurde ein Verhältnis nach der linearen Methode der kleisten Quadrate für das menschliche Blut bei 37°C und 100 kHz über einen Blutzentrifugenwertbereich von 14 bis 45% bestimmt.
    Notes: Abstract In order to be able to employ the electrical-impedance method for the measurement of cardiac output in patients on haemodialysis where a wide range of haematocrits may be encountered, a knowledge of the relationship between the resistivity and haematocrit of blood is required. A linear least-squares relationship has been determined for human blood at 37°C and 100 kHz over the haematocrit range from 14 to 45%
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02477725
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  • 7
    Electronic Resource
    Electronic Resource
    The measurement of residual urine volume by electrical impedance in man (1975)
    Springer
    Medical & biological engineering & computing 13 (1975), S. 307-308 
    Details
    ISSN: 1741-0444
    Keywords: Residual urine volume ; Electrical impedance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02477746
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Detrusor and uterine cervix electromyography (1976)
    Springer
    Medical & biological engineering & computing 14 (1976), S. 432-435 
    Details
    ISSN: 1741-0444
    Keywords: Bladder e.m.g. ; Cervix e.m.g.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Electromyographic studies of various smooth muscle organs have been made by different workers to define the normal physiology and to try to elucidate the nature of some pathological conditions. High-frequency low-voltage activity has been recorded previously from both the uterus and the bladder. Low-frequency high-voltage activity recorded from the bladder and from the gastrointestinal tract has been shown to correlate with different pathological disorders. The paper describes the low-frequency high-voltage electromyographic activity, previously unreported, which can be recorded from the cervix uteri, and discusses the means of computer frequency analysis in the quantisation of such signals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02476120
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    An analogue circuit for the computation of stroke volume by the electrical impedance method (1976)
    Springer
    Medical & biological engineering & computing 14 (1976), S. 74-78 
    Details
    ISSN: 1741-0444
    Keywords: Impedance cardiograph ; Analogue computer ; Stroke volume ; Cardiac output
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Description / Table of Contents: Sommaire L'article décrit un circuit analogue servant à mesurer les volumes de battement pour usage en conjonction avec l'e.c.g.dZ/dt et les signaux phonocardiogrammes produits par un cardiographe d'impédance IFM. L'affichage est effectué sur un cadran numérique. Ce circuit peut être étendu pour mesurer le rendement cardiaque.
    Abstract: Zussammenfassung Es wird eine Analogschaltung zum Einsatz in Verbindung mit dendZ/dt-, e.k.g.-und Phonokardiogrammsignalen von einem IFM-Impedanz-Kardiographen zur Messung des Hubvolumens beschrieben. Die Anzeige erfolgt auf einem digitalen Meßgerät. Die Schaltung kann zur Messung der Herzleistung erweitert werden.
    Notes: Abstract An analogue circuit is described for use in conjunction with thedZ/dt, e.c.g. and phonocardiogram signals from an IFM Impedance Cardiograph to measure stroke volume. This is displayed on a digital meter. The circuit can be extended to measure cardiac output.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02477094
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  • 10
    Electronic Resource
    Electronic Resource
    Editorial (1975)
    Springer
    Medical & biological engineering & computing 13 (1975), S. 149-149 
    Details
    ISSN: 1741-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02477721
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    Paper (German National Licenses)
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