Overview
11 DESCRIPTION TachoSil Fibrin Sealant Patch is a sterile, bioabsorbable combination product comprised of two active substances (human plasma-derived fibrinogen and human plasma-derived thrombin) coated onto a collagen sponge of equine origin. The collagen sponge serves as a flexible and mechanically stable carrier for the active substances to facilitate application of the human fibrinogen and...
Mechanism of Action
12 CLINICAL PHARMACOLOGY 12.1 Mechanism of Action The mechanism of action of TachoSil is based on the interaction between the active biological substances (human fibrinogen and human thrombin) and the physiology of the fibrin clot formation (Fig. 3A) . Upon contact with a bleeding wound surface, the active substances coated onto the equine collagen patch become dissolved and partly diffuse into the wound surface. The subsequent fibrinogen-thrombin reaction initiates the last step in the cascade of biochemical reactions-conversion of fibrinogen into fibrin monomers that further polymerize to form the fibrin clot. Hemostasis is achieved when the formed fibrin clot adheres the collagen patch to the wound surface, thus providing a physical barrier to bleeding (Fig 3B) .
Indications
- 1 INDICATIONS AND USAGE TachoSil is a fibrin sealant patch indicated for use with manual compression in adult and pediatric patients as an adjunct to hemostasis in cardiovascular and hepatic surgery when control of bleeding by standard surgical techniques (such as suture, ligature or cautery) is ineffective or impractical. Limitations for Use TachoSil cannot safely or effectively be used in place of sutures or other form of mechanical ligation for the treatment of major arterial or venous bleeding. Not for use in children under one month of age.
Common Doses
- Refer to label
Dosage
2 DOSAGE AND ADMINISTRATION For topical use on cardiovascular or hepatic tissue only Determine the number of patches to be applied by the size of the bleeding area. Apply the yellow, active side of the patch to the bleeding area. When applying TachoSil, do not exceed the maximum number of patches shown in Table 1 [see Warnings and Precautions (5.6) ] . Table 1. Amount of Fibrinogen and Thrombin per Total Patch Size and Maximum Number of TachoSil Patches to be Applied TachoSil Patch Size Human Fibrinogen (mg) Human Thrombin (Units) Maximum Number of Patches to be Applied 3.7 inch x 1.9 inch (9.
Contraindications
- 4 CONTRAINDICATIONS Do not use TachoSil for: • Intravascular application. Bleeding from large defects in visible arteries or veins where the injured vascular wall requires repair and maintenance of vessel patency or where there would be persistent exposure of TachoSil to blood flow during absorption of the product. This can result in life-threatening thromboembolic events [see Warnings and Precautions (5.1) ] . • Individuals known to have anaphylactic or severe systemic reaction to human blood products or horse proteins [see Warnings and Precautions (5.2) ] .
Side Effects
- 6 ADVERSE REACTIONS The adverse reactions reported in more than one percent of patients during clinical trials were anemia, nausea and vomiting, fever, abdominal pain, increased white blood cell count, ascites, itching, atrial fibrillation, pleural effusion, gastrointestinal hemorrhage, wound infection, hypophosphatemia, urinary tract infection, and post-procedural bile leakage in hepatic surgery. The most common adverse reactions reported in >1% of patients during clinical trials were anemia, nausea and vomiting, fever, abdominal pain, increased white blood cell count, ascites, itching,...
Interactions
- No major interactions listed on the FDA label. Always consult a healthcare professional.