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  • 1980-1984  (4)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Maternal diabetes and neonatal respiratory distress. II. Prediction of fetal lung maturity (1984)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 91 (1984), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Fifty babies were born at ≤ 37 weeks to mothers with diabetes. Delivery was undertaken in all patients with the reassurance that the L/S ratio was ≥2.0 within the preceding 72 h. Five babies (10%) developed respiratory distress syndrome (RDS). Prediction of fetal lung maturity was improved dramatically by measuring amniotic fluid concentrations of phosphatidylcholine (PC), phosphatidylinositol (PI) and phosphatidyl-glycerol (PG). Fourteen babies were predicted as having ‘no surfactant’ (PC 〈 20 mg/1, PI 〈 2 mg/1 and PG 〈 2 mg/1), five developed RDS. None of the remaining 36 babies developed the illness: they were predicted as having either ‘early surfactant’ (PC ≥ 20 mg/1, PI ≥ 2 mg/1 but PG 〈 2 mg/1) or ‘late surfactant’ (PC ≥ 20 mg/1, PI ≥ 2 mg/1 and PG ≥ 2 mg/1). Measurement of PC levels alone was the most accurate method of predicting RDS. There was a significant association between low surfactant phospholipid concentrations and the development of transient tachypnoea of the newborn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1984.tb05917.x
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Is the lecithin/sphingomyelin ratio outdated? (1983)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 90 (1983), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary. The lecithin/sphingomyelin (L/S) ratio in amniotic fluid is an excellent predictor of fetal lung maturity in most pregnancies but today its value is limited. A review of the use of the L/S ratio service in Manchester from 1975 to 1981 (inclusive) shows a dramatic and consistent fall in the number of requests made over the last 18 months of this period resulting in inconvenience and inefficiency in the laboratory service. Possible explanations for the declining use of the L/S ratio service are discussed with particular reference to St Mary's Hospital, Manchester and a regional re-organization of laboratory assessment of fetal lung maturity is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1983.tb06436.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Maternal diabetes and neonatal respiratory distress. I. Maturation of fetal surfactant (1984)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 91 (1984), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The phospholipid composition of amniotic fluid samples from 30 normal patients and 44 diabetic patients over the last 10 weeks of pregnancy was studied. Higher levels of phosphatidylcholine (PC) and phosphatidylinositol (PI) were found in diabetic pregnancies where there was excellent glucose control. These differences were statistically significant at 34–36 weeks. Phosphatidylglycerol (PG) aeared significantly earlier in the well controlled diabetic pregnancies. but even in the poorly controlled diabetics the levels of PC, PI and PG were comparable to those in normal pregnancies. There was no evidence of delayed aearance of fetal surfactant phospholipids in either the well or poorly controlled diabetic pregnancies. The absolute lecithin (PC)/sphingomyelin (SM) ratio in diabetic pregnancies was generally greater for any given gestational age than those in normal pregnancies. Whilst in most cases this was due to a higher PC concentration, in a few poorly controlled diabetics it was the result of a lower concentration of SM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1984.tb05916.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Reproductive value and appropriateness of response to predators by White-Crowned Sparrows (1980)
    Springer
    Behavioral ecology and sociobiology 7 (1980), S. 227-231 
    Details
    ISSN: 1432-0762
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Twenty-five pair of breeding Whitecrowned Sparrows were presented with a live snake and models of a hawk, jay, and junco. Pairs were tested either when the female was brooding eggs, feeding nestlings, or fledglings. It was found that the snake was responded to the most when the pair had nestlings, very little when the female was brooding eggs, and at a moderate level with fledglings. The hawk and jay models were responded to the least with eggs, more with nestlings, and the most with fledglings. The junco model elicited little response. Both the pattern and level of response is influenced by whether or not the stimulus represents an effective predator at the particular stage of the breeding cycle. They also are influenced by the reproductive value of the progeny. A model is suggested that includes two factors: stimulus value and reproductive value. We propose that this combined model is more suitable than a single factor one.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00299368
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    Paper (German National Licenses)
    Fulltext
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