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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4
|
| pubmed:dateCreated |
1997-12-9
|
| pubmed:abstractText |
To examine the reliability of umbilical artery pH measurements, two study designs were employed: (1) contemporaneous measurement of two adjoining segments of umbilical cords at birth (n = 40) and (2) repeat measurements at < 5, 15, 30, 45 and 60 minutes after birth in separate sections of the same cords (n = 40). The cord sections were left at room temperature. Limits of agreement of the contemporaneous pH measurements were from -0.066 to +0.066. Mean umbilical artery blood pH declined only slightly with time. Limits of agreement for delayed measurements were -0.061 to +0.031 at 15 minutes, -0.087 to +0.033 at 30 minutes, -0.090 to +0.046 at 45 minutes and -0.091 to +0.049 at 60 minutes. We therefore conclude that in both contemporaneous and interval sampling the accuracy of umbilical artery pH measurements is subject to biological variation. The 95% confidence interval for an individual umbilical artery pH measurement typically lies between -0.066 and +0.066 of the measured value.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:issn |
0300-5577
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
25
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
340-6
|
| pubmed:dateRevised |
2004-11-17
|
| pubmed:meshHeading | |
| pubmed:year |
1997
|
| pubmed:articleTitle |
Reliability of individual umbilical artery pH measurements.
|
| pubmed:affiliation |
Department of Obstetrics and Gynecology, Leiden University Hospital, The Netherlands.
|
| pubmed:publicationType |
Journal Article
|