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Recombinant human activated factor VII is thrombogenic in a rabbit model of cyclic flow reduction and does not reduce intra-abdominal bleeding.

Abstract：

: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.

journal_name

Thromb Haemost

journal_title

Thrombosis and haemostasis

authors

Charbonneau S,Girard F,Boudreault D,Ruel M,Blais N,Hardy JF

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

296-303

issue

2

eissn

0340-6245

issn

2567-689X

pii

07020296

journal_volume

97

pub_type

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