Supportive treatment in patients where standard surgical techniques are insufficient:

- for improvement of haemostasis.

- as suture support: in vascular surgery.

VeraSeal is indicated in all age groups.

The use of VeraSeal is restricted to experienced surgeons who have been trained in the use of this medicinal product.

Posology

The volume of VeraSeal to be applied and the frequency of application should always be oriented towards the underlying clinical needs for the patient.

The dose to be applied is governed by variables including, but not limited to, the type of surgical intervention, the size of the area and the mode of intended application, and the number of applications.

Application of the product must be individualised by the treating physician. In clinical trials, the individual dosages have typically ranged from 0.3 to 12 ml. For other procedures, larger volumes may be required.

The initial volume of the product to be applied at a chosen anatomic site or target surface area should be sufficient to entirely cover the intended application area. The application can be repeated, if necessary.

Paediatric population

The safety and efficacy of VeraSeal in children aged 0 to 18 years has been evaluated on a clinical study. Currently available data are described in section 5.1. Application of the product must be individualised by the treating physician. In the paediatric clinical trial, the individual dose ranged from 0.6 to 12 ml.

Method of administration 

For epilesional use.

For instructions on preparation of the medicinal product before administration, see section 6.6. The product should only be administered according to the instructions and with the devices recommended for this product (see section 6.6.).

Prior to applying VeraSeal, the surface area of the wound needs to be dried by standard techniques (e.g. intermittent application of compresses, swabs, use of suction devices).

For spray application, see sections 4.4 and 6.6 for specific recommendations on the required distance from tissue per surgical procedure.

Precautions for use

For epilesional use only. Do not apply intravascularly.

Life threatening thromboembolic complications may occur if the preparation is unintentionally applied intravascularly (see section 4.8).

VeraSeal spray application should only be used if it is possible to accurately judge the spray distance, especially during laparoscopy. Spray distance from tissue should be within the range recommended by the marketing authorisation holder of VeraSeal (see section 6.6).

When using accessory tips, the instructions for use of the tips should be followed.

Before administration of VeraSeal, care must be taken that the parts of the body outside the desired application area are sufficiently protected (covered) to prevent tissue adhesion at undesired sites.

VeraSeal should be applied as a thin layer. Excessive clot thickness may negatively interfere with the product’s efficacy and the wound healing process.

Adequate data are not available to support the use of this product in tissue gluing, neurosurgery, application through a flexible endoscope for treatment of bleeding or in gastrointestinal anastomoses.

Hypersensitivity reactions

As with any protein product, allergic type hypersensitivity reactions are possible. Signs of hypersensitivity reactions include hives, generalised urticaria, tightness of the chest, wheezing, hypotension, and anaphylaxis. If these symptoms occur, the administration must be discontinued immediately. In case of shock, standard medical treatment for shock should be implemented. 

Transmissible agents

Standard measures to prevent infections resulting from the use of medicinal products prepared from human blood or plasma include selection of donors, screening of individual donations and plasma pools for specific markers of infection and the inclusion of effective manufacturing steps for the inactivation /removal of viruses. Despite this, when medicinal products prepared from human blood or plasma are administered, the possibility of transmitting infective agents cannot be totally excluded. This also applies to unknown or emerging viruses and other pathogens.

The measures taken are considered effective for enveloped viruses such as human immunodeficiency virus (HIV), hepatitis B virus and hepatitis C virus, and for the non-enveloped hepatitis A virus. The measures taken may be of limited value against non-enveloped viruses such as parvovirus B19. Parvovirus B19 infection may be serious for pregnant women (foetal infection) and for individuals with immunodeficiency or increased erythropoiesis (e.g. haemolytic anaemia).

Traceability

In order to improve the traceability of biological medicinal products, the name and the batch number of the administered product should be clearly recorded.

No formal interaction studies have been performed. Similar to comparable products or thrombin solutions, the product may be denatured after exposure to solutions containing alcohol, iodine or heavy metals (e.g. antiseptic solutions). Such substances should be removed to the greatest possible extent before applying the product. 

Pregnancy 

There is limited amount of data from the use of Human Fibrinogen and Human Thrombin in pregnant women. Animal studies are insufficient with respect to reproductive toxicity. VeraSeal should be given to a pregnant woman only if clearly needed.

Breastfeeding

There is insufficient/limited information on the excretion of Human Fibrinogen and Human Thrombin in human or animal breast milk. A risk to the newborns/infants cannot be excluded. A decision on whether to continue/discontinue breast-feeding or to continue/discontinue therapy with VeraSeal should be made taking into account the benefit of breast-feeding to the child and the benefit of VeraSeal therapy to the woman.

Fertility

Fertility studies have not been conducted.

Not relevant.

Summary of the safety profile

Hypersensitivity or allergic reactions (which may include angioedema, burning and stinging at the application site, bronchospasm, chills, flushing, generalised urticaria, headache, hives, hypotension, lethargy, nausea, restlessness, tachycardia, tightness of the chest, tingling, vomiting, wheezing) may occur in rare cases in patients treated with fibrin sealant/haemostatic products. In isolated cases, these reactions have progressed to severe anaphylaxis. Such reactions may especially be seen, if the preparation is applied repeatedly, or administered to patients known to be hypersensitive to constituents of the product. 

Antibodies against components of fibrin sealant/haemostatic products may occur rarely. 

Inadvertent intravascular injection could lead to thromboembolic event and disseminated intravascular coagulation (DIC), and there is also a risk of anaphylactic reaction (see section 4.4). 

For safety information with respect to transmissible agents, see section 4.4.

Tabulated list of adverse reactions

The table presented below is according to the MedDRA system organ classification (SOC and Preferred Term Level).

Frequencies have been evaluated according to the following convention: 

• Very common (≥1/10) 

• common (≥1/100 to <1/10) 

• uncommon (≥1/1,000 to <1/100) 

• rare (≥1/10,000 to <1/1,000) 

• very rare (<1/10,000) 

• not known (cannot be estimated from the available data).

Within each frequency grouping, adverse reactions are presented in order of decreasing of seriousness.

Frequency of Adverse Reactions (ADRs) in clinical studies with VeraSeal: 

To report any side effect(s):

Saudi Arabia:

● The National Pharmacovigilance Centre (NPC)

- SFDA Call Center: 19999

- E-mail: npc.drug@sfda.gov.sa

- Website: https://ade.sfda.gov.sa/

Other GCC States:

● Please contact the relevant competent authority.

There have not been any cases of overdose reported with VeraSeal.

Pharmacotherapeutic group: Antihaemorrhagics, local hemostatics, ATC code: B02BC

Mechanism of action

The fibrin adhesion system initiates the last phase of physiological blood coagulation. Conversion of fibrinogen into fibrin occurs by the splitting of fibrinogen into fibrin monomers and fibrinopeptides. The fibrin monomers aggregate and form a fibrin clot. Factor XIIIa, which is activated from factor XIII by thrombin, crosslinks fibrin. Calcium ions are required for both, the conversion of fibrinogen and the crosslinkage of fibrin. 

As wound healing progresses, increased fibrinolytic activity is induced by plasmin and decomposition of fibrin to fibrin degradation products is initiated.

Clinical efficacy and safety

Randomized, single-blind clinical studies with VeraSeal were conducted in subjects undergoing vascular, parenchymous tissue and soft tissue surgery demonstrating haemostasis, and suture support in vascular surgery. Each of these 3 trials enrolled a specific surgery type and recruited mainly adult subjects.

During the vascular surgery study 225 subjects were enrolled and underwent vascular surgical procedures utilizing polytetrafluoroethylene graft material on end-to-side arterial anastomosis or on upper extremity vascular access arterial anastomosis. The mean age of the study population and its standard deviation was 63.2 (9.5) years. The most frequent surgery types were femoral-popliteal bypass grafting, upper extremity vascular access for hemodialysis, and ilio-femoral bypass grafting. VeraSeal was shown to be superior to the control group (manual compression) in achieving hemostasis by 4 minutes. The rate of hemostasis at the target bleeding site by 4 minutes was 76.1% in the VeraSeal treatment group and was 22.8% in the control group. 

During parenchymous tissue surgery study 325 subjects were enrolled and underwent liver resections. The mean age of the study population and its standard deviation was 57.9 (14.5) years. VeraSeal was shown to be superior to the control group (oxidized regenerated cellulose) in achieving hemostasis by 4 minutes. The rate of hemostasis at the target bleeding site by 4 minutes was 92.8% in the VeraSeal treatment group and was 80.5% in the control group. 

During soft tissue surgery study 327 subjects were enrolled and underwent pelvic and retroperitoneal surgical procedures, and abdominoplasties and mastopexies. The mean age of the study population and its standard deviation was 47.2 (18.4) years. The most frequent surgery types were simple or radical hysterectomies, abdominoplasties, and radical cystectomies. VeraSeal was shown to be non-inferior to the control group (oxidized regenerated cellulose) in achieving hemostasis by 4 minutes. The rate of hemostasis at the target bleeding site by 4 minutes was 82.8% in the VeraSeal treatment group and was 77.8% in the control group. 

Paediatric population

A paediatric randomized, active controlled, single-blind, clinical trial was conducted to evaluate the safety and efficacy of VeraSeal as an adjunct to haemostasis during open parenchyma (hepatic) surgery or soft tissue surgery. A total of 178 children (< 18 years of age) were randomized and treated with VeraSeal (n=91) or active control (n=87). Of the 91 subjects treated with VeraSeal, 4 were ≤ 27 days; 19 were ≥ 28 days to ≤ 23 months; 32 were ≥ 2 years to ≤ 11 years; 36 were ≥ 12 years to ≤ 17 years. Forty-six children treated with VeraSeal underwent parenchyma (hepatic) surgical procedures and 45 had soft tissue surgeries. VeraSeal was shown to be non-inferior to the control group (EVICEL [sealant]) in achieving hemostasis by 4 minutes. The rate of hemostasis at the target bleeding site by 4 minutes was 96.7% (88/91 subjects) in the VeraSeal treatment group and was 95.4% (83/87) in the control group.

Additionally in the 3 previously described studies mainly in adult subjects that evaluated VeraSeal by specific surgery type eleven paediatric subjects aged 16 years or younger were treated with VeraSeal. 

VeraSeal is intended for epilesional use only. Intravascular administration is contraindicated. Consequently, intravascular pharmacokinetic studies were not performed in man. 

Fibrin sealant/haemostatic products are metabolised in the same way as endogenous fibrin by fibrinolysis and phagocytosis.

Non-clinical data reveal no special hazard for humans based on conventional studies of safety pharmacology and acute toxicity.

Human fibrinogen syringe

Sodium citrate dihydrated

Sodium chloride

Arginine

Isoleucine

Glutamic acid monosodium

Water for injections

Human thrombin syringe

Calcium chloride

Human albumin

Sodium chloride

Glycine

Water for injections

This medicinal product must not be mixed with other medicinal products.

Store and transport in a freezer (at - 18 ºC or colder). The cold storage chain (- 18 ºC or colder) must not be interrupted until use. Keep the sterilized blister in the outer carton to protect from light.

Once thawed, do not refreeze. For storage conditions after thawing the medicinal product and after first opening, see section 6.3.

VeraSeal is supplied as a single-use kit containing two pre-filled syringes (glass type I) with rubber stoppers, each with a sterile frozen solution, assembled in a syringe holder.

One Dual Applicator with two additional Airless Spray Tips is supplied with the product, for application by spraying or dripping. The Airless Spray Tips are radiopaque. See scheme below.

VeraSeal is available in the following pack sizes: 

• VeraSeal 2 ml (containing 1 ml of human fibrinogen and 1 ml of human thrombin) 

• VeraSeal 4 ml (containing 2 ml of human fibrinogen and 2 ml of human thrombin)

• VeraSeal 6 ml (containing 3 ml of human fibrinogen and 3 ml of human thrombin)

• VeraSeal 10 ml (containing 5 ml of human fibrinogen and 5 ml of human thrombin)

Not all pack sizes may be marketed.

The instructions for use are also described in the healthcare professionals’ package leaflet part.

An overview of thawing methods and storage after thawing is provided in Table 2.

Table 2. Thawing and storage after thawing

• Preferred thawing methods

Refrigerator thawing

1. 1.Remove carton from freezer and place it in the refrigerator for thawing at 2 – 8 °C

a minimum of 7 hours for the 2 ml and the 4 ml package sizes  

a minimum of 10 hours for the 6 ml and the 10 ml package sizes

After thawing, it is not necessary to warm the product for its use.

After thawing, the solutions must be clear to slightly opalescent and colourless to pale yellow.

Do not use solutions that are cloudy or have deposits.

Thawing at 20 ºC - 25 ºC

Remove carton from freezer, open it and take out the two blisters.

Place the blister containing the Dual Applicator on a surface at 20 ºC - 25 ºC until the fibrin sealant is ready to use.

Thaw blister with VeraSeal pre-filled syringes at 20 ºC – 25 ºC using the following steps:

1. Place the blister containing the syringe holder with pre-filled syringes on a surface at 20 ºC - 25 ºC

a minimum of 70 minutes for the 2 ml and the 4 ml package sizes  

a minimum of 90 minutes for the 6 ml and the 10 ml package sizes

After thawing, it is not necessary to warm the product for its use.

After thawing the solutions must be clear to slightly opalescent and colourless to pale yellow. Solutions that are cloudy or have deposits should not be used.

Post-Thawing Storage

After thawing, the kit containing the VeraSeal syringe holder with pre-filled syringes and Dual Applicator can be stored before use for not more than 7 days in the refrigerator at 2 - 8 ºC or 24 hours not above 25 °C if it remains sealed in the original packaging. Once the blisters are opened, use VeraSeal immediately and discard any unused contents. 

Once thawed, do not refreeze.

Transferring instructions 

1. After thawing, remove the blister from the surface at 20 ºC – 25 ºC or from the refrigerator at 2 °C  8 °C.

2. Open the blister and confirm that the VeraSeal pre-filled syringes are completely thawed.  Make the VeraSeal syringe holder with pre-filled syringes available to a second person for transfer to the sterile field. The outside of the blister should not come in contact with the sterile field. See Figure 1.

Figure 1

• Sterile Water Bath (Quick Thawing) 

Remove carton from freezer, open it and take out the two blisters.

Place the blister containing the Dual Applicator on a surface at 20 ºC - 25 ºC until the fibrin sealant is ready to use.

Thaw VeraSeal pre-filled syringes inside the sterile field in a sterile thermostatic water bath at a temperature of 37±2 ºC using the following steps: 

NOTE: Once the VeraSeal blisters are opened, use the product immediately. Use sterile technique to avoid the possibility of contamination due to improper handling, and follow the steps below accurately. Do not remove the syringe luer cap until thawing is complete and the Dual Applicator is ready to be attached.

1. Open the blister and make the VeraSeal syringe holder with pre-filled syringes available to a second person for transfer to the sterile field. The outside of the blister should not come in contact with the sterile field. See Figure 1.

2. Place the syringe holder with pre-filled syringes directly into the sterile water bath ensuring that it is completely immersed in the water. See Figure 2.  

3. At 37 ºC, the time needed is approximately 5 minutes for the 2 ml, 4 ml, 6 ml, and 10 ml package sizes, but must not be left at this temperature for longer than 10 minutes.  

The temperature of the water bath must not exceed 39 ºC.

4. Dry the syringe holder with pre-filled syringes after thawing, using a sterile surgical gauze.

Figure 2

Confirm that the VeraSeal pre-filled syringes are completely thawed. After thawing, the solutions must be clear to slightly opalescent and colorless to pale yellow. Do not use solutions that are cloudy or have deposits.

Use VeraSeal immediately and discard any unused contents. 

• Connection instructions

1. Open the blister and make the VeraSeal Dual Applicator and two additional Airless Spray Tips available to a second person for transfer to the sterile field. The outside of the blister should not come in contact with the sterile field.

2. Hold the VeraSeal syringe holder with syringe luer caps pointed upward. See Figure 3.

3. Unscrew and discard the syringe luer cap of both fibrinogen and thrombin syringes. See Figure 3. 

Figure 3

4. Hold the syringe holder with the luers pointed upward. To remove air bubbles from syringes, strike gently the side of the syringe holder one or two times while keeping the syringe holder in an upright position and lightly depress the plunger to eject air. See Figure 4.

Figure 4

5. Attach the Dual Applicator. See Figure 5.

NOTE: Do not depress plunger during attachment or prior to intended use because the two biologic components will pre-mix in the Airless Spray Tip, forming a fibrin clot that prevents dispensing. See Figure 6. 

Figure 5

Figure 6

6. Tighten luer locks and ensure the Dual Applicator is firmly attached. The device is now ready to use.

• Administration

Apply VeraSeal using the syringe holder and plunger supplied.

Apply VeraSeal using the Dual Applicator provided with the product. Other applicator tips approved by SFDA (including open surgery and laparoscopic use devices) intended for specific use with VeraSeal may also be used. When using the provided Dual Applicator, follow the connection instructions described above. When using other applicator tips, follow the instructions for use that are provided with the applicator tips. 

Application by spraying

1. Grasp and bend the Dual Applicator to the desired position. Tip will retain its shape.

2. Position the Airless Spray Tip at least 2 cm away from the target tissue. Apply firm even pressure to the plunger to spray the fibrin sealant. Increase distance accordingly to achieve desired coverage of the target area.

3. If expression is stopped for any reason, change the Airless Spray Tip prior to resuming application since a clot may form inside the Airless Spray Tip. To change the Airless Spray Tip, remove the device from the patient and unscrew the used Airless Spray Tip. See Figure 7. Place the used Airless Spray Tip away from the spare Airless Spray Tips. Wipe the end of the applicator using dry or moist sterile surgical gauze. Then, connect a new Airless Spray Tip provided in the package and ensure it is firmly connected before use. 

NOTE: Red indicator will not be visible if Airless Spray Tip is properly connected. See Figure 8.

NOTE: Do not continue pushing the plunger in an attempt to clear the fibrin clot within the Airless Spray Tip; otherwise the applicator may become unusable.

NOTE: Do not trim the Dual Applicator to avoid exposing internal wire.

Figure 7

Figure 8

Application by dripping

1. Remove the Airless Spray Tip portion of the spray and drip tip by unscrewing the Airless Spray Tip. See Figure 7. 

2. Grasp and bend the drip tip to the desired position. Tip will retain its shape.

3. During dripping, keep the end of the drip tip as close to the tissue surface as possible without touching the tissue during application. 

4. Apply individual drops to the surface area to be treated. To prevent uncontrolled clotting, allow the drops to separate from each other and from the end of the drip tip. 

NOTE: Do not reconnect a used drip tip after it has been removed from the adapter; otherwise a clot may form inside the drip tip and the applicator may become unusable.

• Disposal

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.