Treatments of Hemophilia

Treatment With Replacement Therapy

Main treatment for hemophilia is called replacement therapy. Concentrates of clotting factor VIII (for hemophilia A) or clotting factor IX (for hemophilia B) are slowly dripped or injected into a vein. These infusions help replace the clotting factor that's missing or low. Clotting factor concentrates can be made from human blood. The blood is treated to prevent the spread of diseases, such as hepatitis. With the current methods of screening and treating donated blood, the risk of getting an infectious disease from human clotting factors is very small.

To further reduce the risk, one can take clotting factor concentrates that aren't made from human blood. These are called recombinant clotting factors. Clotting factors are easy to store, mix, and use at home. It only takes about 15 minutes to receive the factor.

The patient can have replacement therapy on a regular basis to prevent bleeding. This is called preventive or prophylactic therapy. Or, the patient can only need replacement therapy to stop bleeding when it occurs. This use of the treatment, on an as-needed basis, is called demand therapy. Demand therapy is less intensive and expensive than preventive therapy. However, there's a risk that bleeding will cause damage before the patient receives the demand therapy.

Complications of replacement therapy include:

·         Developing antibodies (proteins) that attack the clotting factor

·         Developing viral infections from human clotting factors

• Damage to joints, muscles, or other parts of the body resulting from delays      treatment

Antibodies can destroy the clotting factor before it has a chance to work. This is a very serious problem. It prevents the main treatment for hemophilia (replacement therapy) from working. These antibodies, also called inhibitors, develop in about 20–30 percent of people who have severe hemophilia A. Inhibitors develop in 2–5 percent of people who have hemophilia B. When antibodies develop, doctors may use larger doses of clotting factor or try different clotting factor sources. Sometimes the antibodies go away. Researchers are studying new ways to deal with antibodies to clotting factors.

Viruses from human clotting factors. Clotting factors made from human blood can carry the viruses that cause HIV/AIDS and hepatitis. However, the risk of getting an infectious disease from human clotting factors is very small due to:

·         Careful screening of blood donors

·         Testing of donated blood products

·         Treating donated blood products with a detergent and heat to destroy viruses

·         Vaccinating people who have hemophilia for hepatitis A and B

Damage to joints, muscles, and other parts of the body. Delays in treatment can cause damage such as:  

• Bleeding into a joint. If this happens many times, it can lead to changes in the shape of the joint and impair the joint's function.
• Swelling of the membrane around a joint.
• Pain, swelling, and redness of a joint.
• Pressure on a joint from swelling, which can destroy the joint.

 

Home Treatment with Replacement Therapy

The patient can do both preventive (ongoing) and demand (as-needed) replacement therapy at home. Many people learn to do the infusions at home for their child or for themselves. Home treatment has several advantages:

• Patient either elder or child can get quicker treatment when bleeding happens. Early treatment lowers the risk of complications.
• Fewer visits to the doctor or emergency room are needed.
• Home treatment costs less than treatment in a medical care setting.
• Home treatment helps children accept treatment and take responsibility for their own health.

The patient must discuss options for home treatment with the doctor or the child's doctor. A doctor or other health care provider can teach you the steps and safety procedures for home treatment. Hemophilia treatment centers are another good resource for learning about home treatment. Doctors can surgically implant vein access devices to make it easier to access a vein for treatment with replacement therapy. These devices can be helpful if treatment occurs often. However, infections can be a problem with these devices. The doctor can help to decide whether this type of device is right for the patient.

Desmopressin

Desmopressin (DDAVP) is a man-made hormone used to treat people who have mild hemophilia A. DDAVP isn't used to treat hemophilia B or severe hemophilia A. DDAVP stimulates the release of stored factor VIII and von Willebrand factor; it also increases the level of these proteins in your blood. Von Willebrand factor carries and binds factor VIII, which can then stay in the bloodstream longer. DDAVP usually is given by injection or as nasal spray. Because the effect of this medicine wears off if it's used often, the medicine is given only in certain situations. For example, if the patient may take this medicine prior to dental work or before playing certain sports to prevent or reduce bleeding.

Antifibrinolytic Medicines

Antifibrinolytic medicines may be used with replacement therapy. They're usually given as a pill, and they help keep blood clots from breaking down. These medicines most often are used before dental work or to treat bleeding from the mouth or nose or mild intestinal bleeding.

Gene Therapy

Researchers are trying to find ways to correct the faulty genes that cause hemophilia. Gene therapy hasn't yet developed to the point that it's an accepted treatment for hemophilia. However, researchers continue to test gene therapy in clinical trials.