| E.1 Medical condition or disease under investigation |
| E.1.1 | Medical condition(s) being investigated |
| Prevention of excessive bleeding in haemophilia A or B subjects with inhibitors undergoing major surgical procedures |
|
| E.1.1.1 | Medical condition in easily understood language |
| Prevent and stop bleeding during and after a major surgical intervention in patients with haemophilia A or B having antibodies against the standard treatment |
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| E.1.1.2 | Therapeutic area | Diseases [C] - Blood and lymphatic diseases [C15] |
| MedDRA Classification |
| E.1.3 | Condition being studied is a rare disease | Yes |
| E.2 Objective of the trial |
| E.2.1 | Main objective of the trial |
| Assess the efficacy of Eptacog Beta (activated) in terms of achieving and maintaining hemostasis in hemophilia A or B patients with inhibitors to Factor VIII or Factor IX undergoing elective major surgical procedures |
|
| E.2.2 | Secondary objectives of the trial |
| Assess the safety of Eptacog Beta (activated) |
|
| E.2.3 | Trial contains a sub-study | No |
| E.3 | Principal inclusion criteria |
- be male with a diagnosis of congenital hemophilia A or B of any severity - have one of the following: a. current positive inhibitor test BU ≥5 (as confirmed at screening by the institutional lab) or history of high-responding inhibitors (BU ≥5) not further successfully treated by Immune Tolerance Induction OR
b. a condition precluding the use of FVIII or FIX products to treat or prevent bleeding such as a previous anamnestic response after exposure to factor concentrates or a previous failure to respond to FVIII or FIX concentrates - be ≥12 years to ≤65 years of age - be scheduled for an elective major surgical procedure - have Hb ≥12 g/dL - patient's and/or parent(s)'/legal guardian(s)' understanding and willingness to comply with the conditions of the protocol written informed consent |
|
| E.4 | Principal exclusion criteria |
- have any coagulation disorder other than hemophilia A or B be immunosuppressed (CD4+ cell counts at screening should be 200/μL) - known intolerance to Eptacog Beta (activated) or any of its excipients - currently receiving immune tolerance induction (ITI) therapy - have a known or suspected allergy or hypersensitivity to rabbits or rabbit proteins - have platelet count <100,000/μL - have received an investigational drug within 30 days or within 5 half-lives of that investigational drug, whichever is longer, of the planned first Eptacog Beta (activated) administration, or be expected to receive such drug during participation in this study. Patients who - - have received fitusiran in a clinical study may not participate in this clinical study for 6 months since the last dose and if they have an antithrombin III level not in the normal range at screening. - for patients using emicizumab, have received during the last 6 months or currently receiving a maintenance dosing regimen of emicizumab different from the indicated one (±10% of approved dose), i.e. different from 1.5 mg/kg once weekly (±10%), 3 mg/kg (±10%) every two weeks or 6 mg/kg (±10%) every four weeks - for patients using emicizumab, currently be any plans, or notes in the patient’s medical records that would suggest the need to increase or decrease emicizumab dosing due to antidrug antibodies (ADAs), reduced PK, or coagulation/safety-related issues (e.g. lack of response, or potential/actual thromboembolic concerns, etc) - have a clinically relevant hepatic (aspartate aminotransferase [AST] and/or alanine aminotransferase [ALT] >3 times the upper limit of normal [ULN]) and/or renal impairment (creatinine >2 times the ULN) - have a history of arterial and/or venous thromboembolic events (such as myocardial infarction, ischemic strokes, transient ischemic attacks, DVT, or PE) within 2 years prior to the planned first dose of Eptacog Beta (activated), uncontrolled arrhythmia, or current NYHA functional classification score of stages II – IV - have an active malignancy (those with non-melanoma skin cancer are allowed) - have any life-threatening disease or other disease or condition which, according to the investigator’s judgment, could imply a potential hazard to the patient, or interfere with the study participation or study outcome (e.g. chronic, unmanaged hepatitis infection) - be using aspirin, non-steroidal anti-inflammatory drugs (NSAIDS), herbs, natural medications, or other drugs with platelet inhibitory properties within one week prior to surgery and for the duration of treatment with Eptacog Beta (activated) - have active gastric or duodenal ulcer disease - have received a FVII- or FVIIa-containing product (either plasma derived or recombinant) within 24 hours prior to administration of Eptacog Beta (activated) - have a contraindication to antifibrinolytics - have planned combined major surgeries at the same time or have already been enrolled and treated for a previous elective major surgery in the same SCOPE HIM study - be administered pharmacologic thromboprophylaxis within 5 half-lives of that medication before surgery or for the duration of treatment with Eptacog Beta (activated) |
|
| E.5 End points |
| E.5.1 | Primary end point(s) |
| Proportion of successfully treated major procedures defined by a good or excellent global hemostatic response obtained by summing assigned scores from a defined 4-point hemostatic scale determined at wound closure (T0), at 24 hours after surgical wound closure, and at 120 hours after surgical wound closure. |
|
| E.5.1.1 | Timepoint(s) of evaluation of this end point |
At wound closure (T0) (based on data collected during the intraoperative period) At 24 hours after surgical wound closure (based on data collected during the 24-hour postoperative period, i.e. 0-24 hours period) At 120 hours after surgical wound closure (based on data collected during the 120-hour postoperative period, i.e. 0-120 hours) |
|
| E.5.2 | Secondary end point(s) |
- Proportion of successfully treated major procedures defined by a good or excellent hemostatic response based on the 4-point hemostatic scale at each of the reference timepoints - Proportion of successfully treated major procedures defined by a good or excellent global hemostatic response based on the 4-point hemostatic scale as assessed by the investigator at subsequent days - Mean difference between actual measurable intraoperative blood loss and maximum predicted blood loss in a similar patient without a bleeding disorder for the same major procedure - Mean difference between actual measurable pstoperative blood loss (measured by the amount of drainage in mL where, and for the duration, drain is needed) and maximum predicted blood loss in a similar patient without a bleeding disorder for the same major procedure at each of the reference timepoints - Mean difference between actual blood product transfusion and maximum predicted blood product transfusion in mL in a similar patient without a bleeding disorder for the same major procedure at each of the reference timepoints - Mean change in Hemoglobin level from initiation of the surgery until last visit - Mean amount of Eptacog Beta (activated) used to maintain hemostasis during surgery and post-surgery - Mean number of bleeding episodes at the surgical site between surgical wound closure and last visit - Mean number of surgical interventions/re-explorations for bleeding episodes between surgical wound closure and last visit - Number of deaths from bleeding attributed to ineffective hemostasis - Number and incidence of TEAEs (i.e. all AEs that occur at the time of or after the IMP administration until follow-up phone call) and AESIs (i.e. thromboembolic events and hypersensitivity reactions) - Mean value at each timepoint and mean change from baseline to each post-baseline timepoint in clinical laboratory parameters (continuous); proportion for each response category at each timepoint and proportion for each response category shift from baseline to each post-baseline timepoint in clinical laboratory parameters (discrete) - Mean value at each timepoint and mean change from baseline to each post-baseline timepoint in vital signs - Proportion for each response category at each timepoint and proportion for each response category shift from baseline to each post-baseline timepoint in physical examination - Mean value at each visit and mean change from baseline to each visit in coagulation-related parameters (fibrinogen and D-dimer levels) |
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| E.5.2.1 | Timepoint(s) of evaluation of this end point |
At wound closure (T0) (based on data collected during the intraoperative period) At 24 hours after surgical wound closure (based on data collected during the 24-hour postoperative period, i.e. 0-24 hours period) At 120 hours after surgical wound closure (based on data collected during the 120-hour postoperative period, i.e. 0-120 hours) |
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| E.6 and E.7 Scope of the trial |
| E.6 | Scope of the trial |
| E.6.1 | Diagnosis | No |
| E.6.2 | Prophylaxis | No |
| E.6.3 | Therapy | Yes |
| E.6.4 | Safety | Yes |
| E.6.5 | Efficacy | Yes |
| E.6.6 | Pharmacokinetic | No |
| E.6.7 | Pharmacodynamic | No |
| E.6.8 | Bioequivalence | No |
| E.6.9 | Dose response | No |
| E.6.10 | Pharmacogenetic | No |
| E.6.11 | Pharmacogenomic | No |
| E.6.12 | Pharmacoeconomic | No |
| E.6.13 | Others | No |
| E.7 | Trial type and phase |
| E.7.1 | Human pharmacology (Phase I) | No |
| E.7.1.1 | First administration to humans | No |
| E.7.1.2 | Bioequivalence study | No |
| E.7.1.3 | Other | No |
| E.7.1.3.1 | Other trial type description | |
| E.7.2 | Therapeutic exploratory (Phase II) | No |
| E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
| E.7.4 | Therapeutic use (Phase IV) | No |
| E.8 Design of the trial |
| E.8.1 | Controlled | No |
| E.8.1.1 | Randomised | No |
| E.8.1.2 | Open | Yes |
| E.8.1.3 | Single blind | No |
| E.8.1.4 | Double blind | No |
| E.8.1.5 | Parallel group | No |
| E.8.1.6 | Cross over | No |
| E.8.1.7 | Other | No |
| E.8.2 | Comparator of controlled trial |
| E.8.2.1 | Other medicinal product(s) | No |
| E.8.2.2 | Placebo | No |
| E.8.2.3 | Other | No |
| E.8.3 |
Will this trial be conducted at a single site globally?
| No |
| E.8.4 | Will this trial be conducted at multiple sites globally? | Yes |
| E.8.6 Trial involving sites outside the EEA |
| E.8.6.2 | Trial being conducted completely outside of the EEA | Yes |
| E.8.6.3 | Specify the countries outside of the EEA in which trial sites are planned |
| Malaysia |
| Mexico |
| South Africa |
| Thailand |
| United States |
| Türkiye |
|
| E.8.7 | Trial has a data monitoring committee | Yes |
| E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
|
| Last visit of last subject |
|
| E.8.9 Initial estimate of the duration of the trial |
| E.8.9.2 | In all countries concerned by the trial years | 2 |
| E.8.9.2 | In all countries concerned by the trial months | 4 |
| E.8.9.2 | In all countries concerned by the trial days | 0 |