Deaths related to intrapartum asphyxia

Ferguson, S. D.; Gehrke, Thorsten; Macintosh, M. C. M.; Lee, C.; Murphy, Deanna; Luckas, Murray; Thomson, Allison; Aird, Ian

doi:10.1136/bmj.316.7140.1318b

BMJ

1998

DOI: 10.1136/bmj.316.7140.1318b

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Deaths related to intrapartum asphyxia

S. D. Ferguson

Thorsten Gehrke

M. C. M. Macintosh³

et al.

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2005

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“…The clinical relevance of B-type natriuretic peptide (BNP) as a diagnostic tool and prognostic marker in patients with cardiovascular diseases has been confirmed recently (1)(2)(3). Over the last 5 years, several immunoassay methods for the measurement of BNP, which share some analytical characteristics, such as full automation, turnaround time Ͻ60 min, lower imprecision, and/or better analytical and functional sensitivity, have become commercially available (1,4 ). The analytical performance and diagnostic accuracy of immunoassays for BNP were compared recently (5,6 ).…”

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“…van de Ouweland, 4 Henk W.A. de Bruijn, 4 Jozien P. Holm, 1 and Albert Mantingh 1 ( 1 Antenatal Diagnosis Unit, Department of Obstetrics and Gynaecology, and 4 Department of Pathology and Laboratory Medicine, University Hospital, Groningen, The Netherlands; 2 Institut fü r Humangenetik der Universität Gö ttingen, Gö ttingen, Germany; 3 Quest Diagnostics Nichols Institute, San Juan Capistrano, CA; * address correspondence to this author at: Department of Obstetrics and Gynaecology, University Hospital, PO Box 30.001, 9700 RB Groningen, The Netherlands; fax 31503611806, e-mail martinweinans@planet.nl) Hyperglycosylated human chorionic gonadotropin (hCG) is a variant of hCG with more asparagine (N)-linked…”

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Comparison of a Fully Automated Immunoassay with a Point-of-Care Testing Method for B-Type Natriuretic Peptide

et al. 2005

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during the same time frame is beyond the scope of this observational study. Our study highlights the fact that isoprostane concentrations have the same limitations as other measures of obstetric outcome, such as pH and Apgar score: i.e., they are increased in neonates with HIE, but may also be increased in apparently healthy infants and may be within reference values in infants who die from acute causes or in whom a pathology manifests after delivery.

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Comparison of a Fully Automated Immunoassay with a Point-of-Care Testing Method for B-Type Natriuretic Peptide

et al. 2005

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Relationship between Isoprostane Concentrations, Metabolic Acidosis, and Morbid Neonatal Outcome

Rogers¹,

Wang²,

Lau³

et al. 2005

Clinical Chemistry

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arginine and ADMA and SDMA, respectively. The addition of l-arginine, ADMA, or SDMA did not influence the measurement of the other analytes. We also determined within-and between-run imprecision (CVs; n ϭ 10). The within-run CVs were 3.3% for l-arginine, 2.6% for ADMA, and 2.5% for SDMA. Between-run CVs were 4.7% for l-arginine, 4.1% for ADMA, and 3.9% for SDMA We also measured ADMA in plasma samples from healthy human volunteers (n ϭ 22) by this LC-MS/MS method. Shown in Fig. 1 is a typical chromatogram of a human plasma sample. Samples were aliquoted (50 L) and frozen at Ϫ20°C before analysis. The mean (SD) concentrations of l-arginine, ADMA, and SDMA were 65.6 (23.4), 0.55 (0.14), and 0.69 (0.23) mol/L, respectively. The mean (SD) molar ratio of l-arginine to ADMA was 132 (55).Our LC-MS/MS-based method allows for the simultaneous determination of ADMA, SDMA, and l-arginine and has been validated for the measurement of these 3 analytes in human plasma. Values obtained for l-arginine, ADMA, and SDMA in human plasma are within previously reported ranges (11)(12)(13)16 ). Major advantages over previous reported methods for the measurement of ADMA include a minimized sample volume and reduction in laboratory work. In particular, in comparison with other LC-MS-based methods (13,14,16,17 ), sample run time has been reduced to 4 min including reequilibration. Chromatographic separation required only slightly more than 2 min. This considerable reduction in analysis time was achieved by use of the specific fragmentation patterns of the ester derivatives of ADMA and SDMA. Identical MS spectra were obtained from the ester derivatives of ADMA and SDMA, but the major fragments in the daughter ion spectra for ADMA and SDMA were at m/z 214 and m/z 228, respectively. These ions were specific for ADMA and SDMA: they were absent in the corresponding spectra of SDMA and ADMA, respectively. In contrast to previous reports, the proposed method allows, for the first time, spectrometric instead of chromatographic separation of these methylated arginines (see the Data Supplement that accompanies the online version of this Technical Brief at http://www.clinchem.org/content/ vol51/issue7/). When a fetus is subjected to a massive perinatal hypoxicischemic insult, it may suffer sufficient damage to cause intrauterine death and stillbirth (1)(2)(3)(4)(5). In less severe,

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Deaths related to intrapartum asphyxia

Cited by 2 publications

References 3 publications

Comparison of a Fully Automated Immunoassay with a Point-of-Care Testing Method for B-Type Natriuretic Peptide

Comparison of a Fully Automated Immunoassay with a Point-of-Care Testing Method for B-Type Natriuretic Peptide

Relationship between Isoprostane Concentrations, Metabolic Acidosis, and Morbid Neonatal Outcome

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