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  • 1
    Digitale Medien
    Digitale Medien
    Descriptors of the rhythmicity in respiration and heart beat of newborn infants (1981)
    Springer
    Medical & biological engineering & computing 19 (1981), S. 83-90 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Epoch ; Heart beat ; Monitoring ; Respiration ; Rhythmicity ; Time window
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract This paper gives a critical discussion of the methods which have been used for describing the time course of respiratory and heart beat rhythms in sleeping newborn babies. Methods which are candidates for this purpose are: non-overlapping or overlapping epochs on the one hand, and analysis on the basis of either intervals between events or counted events per unit of time on the other. The properties of the various descriptors obtained with the different procedures are reviewed. In conclusion, preference is given to the overlapping-epochs method and analysis in terms of counted events, i.e. number of heart beats and number of respirations within a time window. Epoch length and window length should be selected such that they are adequate for the problem at hand.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02443852
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 2
    Digitale Medien
    Digitale Medien
    Compiled profile of respiration, heart beat and motility in newborn infants: A methodological approach (1985)
    Springer
    Medical & biological engineering & computing 23 (1985), S. 15-22 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Cross-correlation ; Heart rate ; Infant ; Motility ; Polygraphy ; Respiration ; Time dependence
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract The inter-relationships between respiration, heart beat and motility are investigated in newborn infants. Motility seems to be a determinant for changes in respiratory and heart rates. In contrast to the more usual epoch analysis of polygraphic recordings, a moving-window method is described in which the positions of the peaks in the three cross-correlation functions between both rates and motility (peak height and time lag when this peak occurs) are displayed as a function of recording time. Heart rate and motility are positively correlated; respiratory rate is negatively correlated with these two variables. There is no time lag between the minima in respiratory rate and the maxima in motility. The heart rate maxima lag approximately 10 s behind the motility maxima and respiratory rate minima.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02444021
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Comparative investigation of the mathematical properties of some descriptors for biological point processes: examples from the human newborn (1982)
    Springer
    Medical & biological engineering & computing 20 (1982), S. 89-93 
    Details
    ISSN: 1741-0444
    Schlagwort(e): Cardiotachogram ; Epoch ; Heart beat ; Monitoring ; Pneumotachogram ; Respiration ; Rhythmicity ; Time window
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract A simple method is introduced to obtain continuous analogue signals representing the number of breaths or heart beats in a certain moving time window. The use of a time window, the duration of which can be chosen at will, stands in contrast to a chosen number of beat-to-beat intervals as is found in existing equipment. The differences are extensively investigated between these signals and the pneumotachogram or cardiotachogram, respectively. The advantage of the new method is the agreement between the numerical value of the produced signal and the traditional measure used by clinicians.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02441856
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
    Volltext
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