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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 86 (1979), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Normal values for fetal scalp tissue pH during labour were determined by using a glass electrode (Kontron-Roche®). A total of 132 recordings was obtained and 84 (64 per cent) were of good quality. After a good quality recording had been obtained, there were 64 infants with an Apgar score of 9 or 10 at one and five minutes after delivery. The 64 recordings showed pH values (Mean ± 2SEM) of 7.38±0.12 six hours before delivery and 7.28±0.12 at the time of delivery. Between the 5th and 55th minutes of the second stage of labour the pH (Mean ± 2SEM) fell from 7.30±0.14 to 7.20±0.13.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 85 (1978), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We made continuous fetal pH-measurement in 50 patients and showed a good correlation between tissue pH and umbilical artery, umbilical vein and the fetal scalp blood pH. There were practical problems in the use of the glass pH electrode.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 226 (1978), S. 163-167 
    ISSN: 1432-0711
    Keywords: Fetaler Säure-Base-Status ; Fetale Anoxie ; Fetalblut ; Fetale Überwachung ; Fetal acid-base-state ; Fetal anoxia ; Fetal distress ; Fetal blood ; Fetal monitoring
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary 60 consecutive fetal CTG-pH-registrations (cardiotocography with continuous pH registration) were analyzed in order to find the causes of the nonsuccessful tracings. Of the 60 tracings, 21 were of good quality, 16 partly successful, and 23 nonsuccessful. The monitoring for each patient had lasted for an average of 154 min with the range of 5–530 min. The quality of the pH recordings were not related to the duration of the pH observation, the maternal age and parity, or to the weight of the infant. If the electrode was applied too early (cervical orifice less than 5 cm) there was a greater risk of a nonsuccessful tracing. The drift of the electrode was less than 0.06 pH-units in 90% of the cases. The rate of nonsuccessful tracings is still too high and the difficulty in sterilization, calibration, and application of the electrode is still rather pronounced. At this moment the pH-electrode should be reserved for scientific use.
    Notes: Zusammenfassung 60 aufeinanderfolgende fetale CTG-pH-Registrierungen (Cardiotokographie mit kontinuierlicher pH-Wert-Registrierung) wurden analysiert, um die Ursachen für nicht auswertbare Aufzeichnungen herauszufinden. Von den 60 Registrierungen zeigten 21 gute Qualität, 16 waren teilweise auswertbar und 23 nicht brauchbar. Die Registrierdauer pro Patientin betrug zwischen 5 und 530 min, durchschnittlich 154 min. Die Qualität der kontinuierlichen pH-Wert-Registrierung war unabhängig von der Dauer der pH-Wert-Uberwachung, dem mütterlichen Alter oder der Parität und auch von dem Gewicht des Kindes. Wurde die Elektrode zu früh appliziert (Muttermundweite unter 5 cm), so war das Risiko einer erfolglosen Registrierung großer. Die Drift der Elektrode lag unter 0,06 pH-Einheiten bei 90% der Fälle. Die Anzahl nicht erfolgreicher Aufzeichnungen liegt immer noch zu hoch und auch die Schwierigkeiten bei der Sterilisation, Eichung und Applikation der Elektrode sind noch zu ausgeprägt. Aus diesen Gründen sollte die pH-Elektrode z. Z. noch nur für wissenschaftliche Untersuchungen eingesetzt werden.
    Type of Medium: Electronic Resource
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