Active principles
Coagulation factor II, human
20 – 48
800 – 1920
Coagulation factor VII, human
10 – 25
400 – 1000
Coagulation factor IX, human
20 – 31
800 – 1240
Coagulation factor X, human
22 – 60
880 – 2400
Other active principles
Protein C
15 – 45
600 – 1800
Protein S
12 - 38
480 – 1520
The total content in proteins is 6 – 14 mg/ml of reconstituted solution.
The specific activity expressed in factor IX is 2.5 UI/mg of total protein.
The activity of all coagulation factors, as well as proteins C and S (antigen) has been tested according to the current international standards established by the World Health Organization (WHO).
Dosage and method of administration
Dosage
The following dosage guidelines are only general.
The dosage and administration frequency will be established on an individual basis for each patient. The dosing intervals must be adapted to the circulating half-lives of the respective coagulation factors in the complex of protrombina. Individual dosing requirements can only be identified based on periodic determinations of plasma levels of coagulation factors or global analysis of complex protrombina levels (INR, Quick test) and continuous monitoring of the patient's clinical situation.
In the case of major surgery, precise monitoring of substitution therapy is essential, using coagulation analysis (specific tests for coagulation factors and/or global analysis to measure complex protrombina levels).
The dosage will depend on the INR value before treatment and the desired INR value. The INR value before treatment should be taken as close as possible to the time of administration to calculate the appropriate dose of Beriplex. The following table shows approximate doses (ml of reconstituted solution product/kg body weight and UI of Factor IX/kg body weight) required to normalize INR (e.g. <1.3) at different initial INR levels.
INR before treatment | 2.0 – 3.9 | 4.0 – 6.0 | > 6.0 |
Approximate dose (ml/kg body weight) | 1 | 1.4 | 2 |
Approximate dose of Factor IX (UI)/kg body weight | 25 | 35 | 50 |
The dose is based on body weight up to, but not exceeding 100 kg. For patients with a body weight exceeding 100 kg, the maximum single dose (UI of Factor IX) must not exceed 2,500 UI for an INR of 2.0 – 3.9, 3,500 UI for an INR of 4.0 – 6.0 and 5,000 UI for an INR > 6.0.
Correction of the bleeding disorder induced by vitamin K antagonists is usually achieved approximately 30 minutes after injection. Administration of vitamin K should be considered in patients treated with Beriplex for urgent neutralization of vitamin K antagonists, as the effect of vitamin K is usually achieved within 4-6 hours. Repeated administration of Beriplex in patients requiring urgent treatment for neutralization of vitamin K antagonists is not recommended, as it is not supported by clinical data.
These recommendations are based on clinical trial data with a limited number of individuals. Recovery and duration of effect may vary, so INR monitoring during treatment is mandatory.
The calculation of the required dose of the protrombina complex concentrate is based on clinical trial data:
?1 UI of factor IX per kilogram of body weight can increase plasma activity of factor IX by 1.3% (0.013 UI/ml) of normal activity.
?1 UI of factor VII per kg of body weight increases plasma activity of factor VII by 1.7% (0.017 UI/ml) of normal activity.
?1 UI of factor II per kg of body weight increases plasma activity of factor II by 1.9% (0.019 UI/ml) of normal activity.
?1 UI of factor X per kg of body weight increases plasma activity of factor X by 1.9% (0.019 UI/ml) of normal activity.
The dosage of a specific factor administered is expressed in International Units (UI), which are related to the current WHO standard for each factor. Plasma activity of a specific coagulation factor is expressed either as a percentage (relative to normal plasma) or in International Units (relative to the international standard for the specific coagulation factor).
One International Unit (UI) of activity of a coagulation factor is equivalent to the amount contained in 1 ml of normal human plasma.
For example, the calculation of the required dose of factor X is based on the finding that 1 International Unit (UI) of factor X per kg of body weight increases plasma activity of factor X by 0.019 UI/ml.
The required dose is determined using the following formula:
Required units = body weight (kg) x desired increase in factor X (UI/ml) x 53, where 53 (ml/kg) is the reciprocal of the estimated recovery.
It should be noted that the calculation is based on data from patients receiving vitamin K antagonists. A calculation based on data from healthy volunteers would provide a lower estimate of the required dose.
If individual recovery is known, this value should be used in the calculation.
Specific information on the product is available from clinical trials with healthy volunteers (N = 15), neutralization of vitamin K antagonists in the treatment of severe bleeding or perioperative prophylaxis of bleeding (N = 98, N = 43).
Pediatric population
The safety and efficacy of Beriplex in children and adolescents have not been established through controlled clinical trials.
Geriatric population
The dosage and method of administration in elderly patients (over 65 years) correspond to general recommendations.
Method of administration
General instructions
-The solution must be transparent or slightly opalescent. After filtration/extraction (see below), and before administration, the reconstituted product must be visually inspected to detect the presence of foreign particles and discoloration.
-Do not use turbid solutions or those containing residues.
-Reconstitution and extraction must be performed under aseptic conditions.
Reconstitution
Bring the solvent to room temperature. Check that the product and solvent vials have been removed from their packaging and that the stoppers have been treated with an antiseptic solution, allowing it to dry before opening the Mix2Vial package.
1 | 1.Open the Mix2Vial blister by removing the packaging.Do notremove the Mix2Vial from the blister |
2 | 2.Place the solvent vial on a clean, flat surface and hold it firmly in place.Hold the Mix2Vial together with the blister and push the blue terminaldownwardinto the stopper of the solvent vial. |
3 | 3.Carefully remove the blister from the Mix2Vial, holding the edge and pullingverticallyupward. Ensure that only the blister is removed and not the Mix2Vial. |
4 | 4.Place the lyophilized powder vial on a flat, firm surface.Invert the solvent vial with the Mix2Vial attached and push the transparent terminaldownwardinto the stopper of the powder vial.The solvent will be automatically transferred to the powder vial. |
5 | 5.With one hand, hold the vial with the product attached to the Mix2Vial and, with the other hand, hold the solvent vial. Carefully unscrew the system in the opposite direction to the clock hands, separating it into two pieces. Dispose of the solvent vial with the blue adapter of the Mix2Vial attached. |
6 | 6.Rotate the vial of the reconstituted solution with the transparent adapter attached gently until the substance has completely dissolved.Do not shake. |
7 | 7.Fill a sterile and empty syringe with air.Hold the vial of the solution in a vertical position, connect the syringe to the Luer Lock adapter of the Mix2Vial by screwing it in the direction of the clock hands.Inject air into the vial of the solution. |
Extraction and administration
8 | 8.Hold the plunger of the syringe pressed and invert the system, aspirate the solution into the syringe by slowly retracting the plunger of the syringe. |
9 | 9.Once the solution has been transferred to the syringe, hold the syringe body firmly in place (keeping the plunger down) and disconnect the transparent adapter of the Mix2Vial from the syringe by unscrewing it in the opposite direction to the clock hands. |
Care must be taken to prevent blood from entering the syringe loaded with the product, as there is a risk that blood may clot in the syringe and that fibrin clots may be administered to the patient.
If more than one vial of Beriplex is needed, it is possible to group several vials of Beriplex in a single infusion using a perfusion accessory available on the market.
The Beriplex solution must not be diluted.
The reconstituted solution must be administered intravenously (at a maximum rate of 8 ml/min).
Elimination of unused medication and all materials that have come into contact with it must be carried out in accordance with local regulations.
Special warnings and precautions for use
No data are available on the use of Beriplex in the case of perinatal hemorrhage due to vitamin K deficiency in neonates.
Guidelines for monitoring platelet count:
Carefully monitor platelet count.
Interaction with other medications and other forms of interaction
When performing coagulation tests sensitive to heparin, in patients treated with high doses of human protrombina complex, consideration should be given to the heparin contained in the product administered.
*in clinical trials with Beriplex, doses were administered at a maximum infusion rate of 0.12 ml/kg/min to patients with a weight <70
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