Please select the eligibility criteria that correspond to the clinical trial below.
Title: Tranexamic Acid for the Treatment of Postpartum Haemorrhage: An International Randomised, Double Blind, Placebo Controlled Trial
Brief Summary: The WOMAN trial is a large pragmatic randomised double-blind, placebo controlled trial to quantify the effects of the early administration of tranexamic acid on death, hysterectomy and other relevant outcomes. 20,000 adult women, after delivery who have clinically diagnosed postpartum haemorrhage, are eligible if the responsible doctor is for any reason substantially uncertain whether or not to use an antifibrinolytic agent. Additionally, TWO nested studies will be conducted in a subset of women trial participants. The first nested study (ETAC) aims to evaluate the effect of tranexamic acid (TXA) on markers of coagulation in 400 women randomised to the WOMAN trial. The second nested study (ETAPLAT) aims to evaluate the haemostatic effect and antithrombotic effect of TXA in 128 women randomised to the WOMAN trial.


Options:
A: All legally adult women with postpartum haemorrhage following vaginal or caesarean section delivery who have a clinical diagnosis of postpartum haemorrhage. The clinical diagnosis of PPH may be based on any of the following:

* Blood loss after vaginal delivery \> 500 mL OR
* \> 1,000 mL after caesarean section OR blood loss sufficient to compromise the haemodynamic status of the woman The fundamental eligibility criterion is the responsible clinician's 'uncertainty' as to whether or not to use an antifibrinolytic agent in a particular woman with postpartum haemorrhage.
* Women for whom the responsible doctor considers there is a clear indication for antifibrinolytic therapy should not be randomised.
* Women for whom there is considered to be a clear contraindication to antifibrinolytic therapy should not be randomised.

Where the responsible clinician is substantially uncertain as to whether or not to use an antifibrinolytic, all these women are eligible for randomisation and should be considered for the trial.

There are no other pre-specified exclusion criteria.
B: Inclusion Criteria:

1. Male and female subjects =/\> 18 years and =/\< 80 years
2. Major trauma (ISS \> 15)
3. Clinical signs of ongoing bleeding or patients who are at risk for significant haemorrhage assessed and judged by the ED team in charge of patient
4. Presence of coagulopathy defined by ROTEM assays as follows,

   * Patients with concomitant decreased fibrinogen polymerisation (ROTEM® FibTEM A10 of \< 7 mm after 10 min)
   * Patients with concomitant decreased coagulation factor levels (ROTEM® ExTEM CT of \> 90 sec)

Exclusion Criteria:

1. Lethal injury
2. CPR on the scene,
3. Isolated brain injury, burn injury
4. Avalanche injury
5. Administration of FFP or coagulation factor concentrates before ED admission
6. Delayed (\> 6hours after trauma) admittance to ED
7. Known use of oral anticoagulants, or platelet aggregation inhibitors within 5 days before injury
8. Known history of severe allergic reaction to plasma products
9. Known history of congenital hemostasis disturbance, IgA or Protein C deficiency
10. Patients with a history of thromboembolic events or heparin induced thrombocytopenia (HIT) type 2 within the last year
11. Patients with a body weight \< 45kg and \> 150kg
12. Patients that are known to be pregnant
13. Jehova's Witness
14. Known participation in another clinical trial
15. Patient with known refusal of a participation in this clinical trial
C: Inclusion Criteria:

* The participants aged 18 years or above who were undergoing emergency aortic arch surgery involving moderate hypothermic circulatory arrest for an acute type A aortic dissection

Exclusion Criteria:

* The participants with congenital or acquired coagulation disorders, previous surgery at the same site, death prior to planned surgery, stroke or myocardial infarction within 2 months before surgery and use of aspirin, clopidogrel or vitamin K antagonists within 2 to 5 days before surgery.
D: Inclusion Criteria:

* adult patients
* with acute significant upper or lower gastrointestinal bleeding
* where the responsible clinician is substantially uncertain as to the appropriateness of antifibrinolytic agents in the patient

Exclusion Criteria:

* The fundamental eligibility criterion is the responsible clinician's 'uncertainty' as to whether or not to use an antifibrinolytic agent in a particular patient with upper or lower gastrointestinal bleeding.
* There are no other exclusions.

Answer: A