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DOI: 10.1160/TH06-08-0429
Recombinant human activated factor VII is thrombogenic in a rabbit model of cyclic flow reduction and does not reduce intra-abdominal bleeding
Financial support: This study was supported in part by the Organon Award of the Department of Anesthesiology of the University of Montreal and by the Rosario Denis Award of the Association des Anesthésiologistes du Québec.Publikationsverlauf
Received
04. August 2006
Accepted after resubmission
01. Januar 2006
Publikationsdatum:
25. November 2017 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00035024/200702/lookinside/thumbnails/10-1160-th06-08-0429-1.jpg)
Summary
Recombinant human activated factor VII (rHuFVIIa) can reduce bleeding but may be associated with arterial thrombosis. We hypothesized that rHuFVIIa would increase the occurrence of cyclic flow reductions (CFR) and reduce intra-abdominal bleeding in an experimental model. An adapted Folts’ model of carotid artery lesion and stenosis was used. Twenty four rabbits were randomized to receive rHuFVIIa (group F) or placebo (group P) in a double-blind fashion. A standardized injury to the common carotid artery resulted in CFR and/or thrombosis. Hematological values, coagulation and thromboelastographic (TEG) variables were compared. Intra-abdominal bleeding was evaluated by measuring blood loss from standardized hepatosplenic lesions. The median number (range) of spontaneous CFR [group P: 6 (0–15); group F: 8 (0–16)] was comparable between groups. The number of induced CFR (by “shaking” of the artery) needed to avert thrombosis (group F: 2; group P: 0 ; p < 0.05) and the incidence of complete carotid artery thrombosis (group F: 3; group P : 0; p < 0.05) were higher in group F. Intra-abdominal bleeding was similar in both groups. TEG analysis demonstrated a hypercoagulable state in both groups but the magnitude of the change was statistically more important in group F. rHuFVIIa increases thrombosis in a rabbit model of carotid artery injury. The bleeding from hepatic and splenic lesions is not reduced by administration of rHuFVIIa despite a hypercoagulable state confirmed by standard TEG analysis.
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