Related Experiment Video
Updated: Aug 21, 2026

Tail Vein Transection Bleeding Model in Fully Anesthetized Hemophilia A Mice
Published on: September 30, 2021
[Excessive blood loss after abdominal hysterectomy -- use of recombinant factor VIIa]
C Weilbach1, D Scheinichen, B Jüttner
1Anästhesieabteilung, St. Josefs-Hospital Cloppenburg. c.weilbach@kh-clp.de
Medical History:
A 38-yr-old woman suffered from excessive blood loss after elective removal of the uterus because of a leiomyoma. The surgical attempt to stop the bleeding failed. The laboratory evaluation before surgery showed normal coagulation parameters (aPTT 23.4 sec, TPZ > 100 %, platelet count 267 000/microl).
Development:
Despite treatment with the plasminogen activator inhibitor Tranexamic Acid (2 x 500 mg) and 10 units of concentrated platelets as well as 31 units of fresh frozen plasma and 31 units of red blood cell concentrates the bleeding continued. Reaching an cumulative blood loss of 15 000 ml the patient developed ventricular fibrillation necessitating cardiac resuscitation including defibrillation and application of epinephrine 7 mg. At this point systolic blood pressure decreased from 90 to 70 mm Hg, the core temperature was 31,9 degrees C. After successful resuscitation (systolic blood-pressure 90 mm Hg after 15 min) the bleeding started again with a blood loss of 2000 ml requiring 3 units of fresh frozen plasma and 3 red cell concentrates Use of recombinant activated Factor VII (r.FVIIa): 6 mg (300 KiU) r.FVIIa have been applied (92 microg/kgKG [4.6 KiE/kg]). Within 10 minutes the bleeding stopped. More transfusions were not necessary. The patient left the intensive care unit 8 days after the operation without neurological deficit.
Conclusion:
The use of recombinant Factor VIIa may stop excessive haemorrhage, even if the cause is unknown.
Related Concept Videos
Venous Thrombosis III: Interprofessional Care
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Introduction to Hemostasis
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Esophageal Varices-II: Clinical Features and Management
In the initial assessment, a thorough review of the patient's medical history is vital to identify risk factors such as liver disease, alcohol abuse, or...
