Abstract:
:To study the normal development of blood coagulation factor activities in a growing fetus while avoiding the effects of labor and delivery, a chronic fetal lamb model was developed in which serial blood samples from 10 fetuses were studied during the third trimester of pregnancy and 24 hr after birth. Under operating room conditions with sterile technique, a polyethylene catheter to which heparin had been bound to both internal and external surfaces was inserted into the femoral artery of the fetus. The catheter was brought out through a skin pouch to the side of the ewe and enclosed in a zip lock bag. Blood samples were withdrawn from the catheter three times each week for measurement of coagulation factor activities. Levels of coagulation factor activities at birth in noncatheterized animals were not different from those found in catheterized animals except for factor IX activity which was 12% higher in the catheterized animals (0.02 less than P less than 0.05). The patterns of development for each of the coagulation factors were similar in all 10 animals studied. Fibrinogen, prothrombin, and factor VII show a decrease in activity early in the last trimester of pregnancy. Both factors VIII and IX show a significant increase in activity (23% factor VIII and 12% factor IX) associated with the process of delivery. The levels of coagulation factor activities at birth in the lamb relative to adult sheep normals are similar to those found in humans with the exception of factor XIII. Factor XIII is at normal levels in the newborn lamb and is reported to be at levels approximately 50% of the adult level in human infants.
journal_name
Pediatr Resjournal_title
Pediatric researchauthors
Kisker CT,Robillard JE,Clarke WRdoi
10.1203/00006450-198107000-00014subject
Has Abstractpub_date
1981-07-01 00:00:00pages
1045-50issue
7eissn
0031-3998issn
1530-0447journal_volume
15pub_type
杂志文章abstract::A number of neuromuscular diseases are associated with molecular defects in the mitochondrial DNA (mtDNA). These include: 1) a missense mutation at nucleotide 11778 in the mtDNA of Leber's hereditary optic neuropathy patients; 2) a heterogeneous array of deletions in the mtDNA of ocular myopathy patients; and 3) small...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199011000-00023
更新日期:1990-11-01 00:00:00
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journal_title:Pediatric research
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doi:10.1203/00006450-198901000-00023
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journal_title:Pediatric research
pub_type: 杂志文章
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更新日期:2017-04-01 00:00:00
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journal_title:Pediatric research
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pub_type: 杂志文章,评审
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更新日期:2018-01-01 00:00:00
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journal_title:Pediatric research
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pub_type: 临床试验,杂志文章
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journal_title:Pediatric research
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doi:10.1203/pdr.0b013e3180332cba
更新日期:2007-04-01 00:00:00
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journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-198708000-00010
更新日期:1987-08-01 00:00:00
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doi:10.1203/PDR.0b013e31813cbed1
更新日期:2007-10-01 00:00:00
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更新日期:2005-07-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
doi:10.1203/00006450-198703000-00002
更新日期:1987-03-01 00:00:00
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journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-200009000-00003
更新日期:2000-09-01 00:00:00
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pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2013-04-01 00:00:00
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更新日期:2009-01-01 00:00:00
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更新日期:1980-02-01 00:00:00
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,评审
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更新日期:2020-01-01 00:00:00
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journal_title:Pediatric research
pub_type: 杂志文章
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更新日期:1988-03-01 00:00:00