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An evaluation of the procoagulant action of recombinant activated factor VII in cord whole blood versus adult whole blood using thromboelastography
- Source :
- Blood coagulationfibrinolysis : an international journal in haemostasis and thrombosis. 16(8)
- Publication Year :
- 2005
-
Abstract
- Recombinant activated factor VII (rFVIIa) has been reported to be effective in adult patients in various clinical situations and might be beneficial in neonates with bleeding tendency. In the present study we compared the procoagulant action of increasing amounts of rFVIIa in both cord whole blood and adult whole blood with respect to changes in the values of the clotting time, clot formation time, and maximum clot firmness by means of thromboelastography. Thromboelastography allows evaluation of the effects of rFVIIa on haemostasis in whole blood. When increasing amounts of rFVIIa were added in vitro to whole blood samples, significant decreases in the values of the clotting time and clot formation time and a significant increase in the maximum clot firmness were observed. Cord whole blood was significantly more sensitive to rFVIIa addition than adult whole blood, an effect probably attributable to the low anticoagulant capacity of the neonatal plasma. Maximum clot firmness values were significantly lower in cord whole blood than in adult whole blood, an effect mainly attributable to the hypofunctional state of neonatal platelets. Since cord whole blood exerted a significantly higher sensitivity to addition of rFVIIa, we speculate that lower doses of rFVIIa might be required to treat neonates with bleeding tendency compared with the adult rFVIIa administration strategy.
- Subjects :
- Adult
Male
Cord
medicine.drug_class
Hemorrhage
Factor VIIa
Umbilical cord
Tissue factor
Medicine
Humans
Platelet
Blood Coagulation
Whole blood
medicine.diagnostic_test
Dose-Response Relationship, Drug
business.industry
Anticoagulant
Age Factors
Infant, Newborn
Hematology
General Medicine
Factor VII
Fetal Blood
Thromboelastography
Recombinant Proteins
Thrombelastography
medicine.anatomical_structure
Clotting time
Anesthesia
Female
business
Subjects
Details
- ISSN :
- 09575235
- Volume :
- 16
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Blood coagulationfibrinolysis : an international journal in haemostasis and thrombosis
- Accession number :
- edsair.doi.dedup.....4a83bc543f1462c4cff3b6aee46ca0f0