| 释义 |
Christmas disease
Christmas diseasen. A type of hemophilia that is caused by a deficiency of factor IX.
[After Stephen Christmas, 20th-century British boy who was first diagnosed with it.]Christmas disease n (Pathology) a relatively mild type of haemophilia, caused by lack of a protein (Christmas factor) implicated in the process of blood clotting [C20: named after S. Christmas, the first patient suffering from the disease who was examined in detail]Thesaurus| Noun | 1. | Christmas disease - a clotting disorder similar to hemophilia A but caused by a congenital deficiency of factor IXhaemophilia B, hemophilia Bbleeder's disease, haemophilia, hemophilia - congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son |
Christmas disease
Christmas diseaseHemophilia (or haemophilia) B, a blood-clotting disorder in which a mutation of the Factor IX gene leads to a deficiency of Factor IX (or Christmas factor), a serine protease of the coagulation system. Both the factor and the disease are named for Stephen Christmas (not the holiday), the first patient discovered to have the condition in 1952. We haven't let our daughter participate in any more physical sports since she was diagnosed with Christmas disease last year.See also: Christmas, diseaseChristmas disease
Christmas disease[′kris·məs di‚zēz] (medicine) A hereditary, sex-linked, hemophilia-like disease involving failure of the clotting mechanism due to a deficiency of Christmas factor. Also known as Factor IX deficiency. Christmas disease
hemophilia [he″mo-fil´e-ah] a hereditary disorder characterized by a strong tendency to bleed. The most common types are carried as sex-linked genes with females carrying the trait and disease manifestations almost always in males. (Occasionally, women carrying the trait for hemophilia A or B have bleeding manifestations themselves, probably as a result of nonrandom inactivation of their X chromosomes and overexpression of the X chromosome coding for hemophilia; these women are referred to as symptomatic carriers.) All daughters of affected men will be carriers for the gene of hemophilia.
The two most common types are hemophilia A and hemophilia B. Over 80 per cent of patients have hemophilia A (classical hemophilia), which is characterized by a deficiency of coagulation factor VIII. Hemophilia B (called also Christmas disease) affects about 15 per cent of hemophiliacs and is characterized by a deficiency of coagulation factor IX. Other coagulation factor deficiencies are less common, with patients suffering either milder bleeding or thrombotic episodes.Symptoms. Bleeding in hemophilic patients is variable, depending on the level of deficiency of the clotting factor. Approximately 60 per cent of persons with hemophilia A or B are severely affected and may have spontaneous bleeding without any recognized trauma. Soft tissue bleeding from the neck, lower face, and tongue may cause grave consequences if not treated. Hematuria and gastrointestinal bleeding are likely, and hemarthrosis (bleeding into joints) can lead to painful stiffening and permanent disability. The leading cause of death, however, is intracranial bleeding. Hemorrhagic complications can be avoided or minimized with early and adequate factor replacement therapy.
Hemophilia A is characterized by a factor VIII level of from 0 to 30 per cent of normal. The partial thromboplastin time (PTT) is usually prolonged. The platelet count, bleeding time, and prothrombin time (PT) are normal. In hemophilia B there is a low factor IX level and the prothrombin time is usually prolonged.Treatment. The treatment of persons with hemophilia depends on the severity of their disease and the nature of a given bleeding episode. Several therapeutic materials are available for correction of the clotting defect in hemophilia A. Factor VIII is present in commercial lyophilized factor VIII concentrates, cryoprecipitate, fresh whole blood, and plasma" >fresh frozen plasma. Purified factor VIII concentrate, however, is the treatment of choice. Successful treatment of those with mild hemophilia A can often be done with desmopressin (DDAVP). While factor IX is present in fresh frozen plasma, it is not concentrated in cryoprecipitate, so that the latter is not useful for treatment of hemophilia B. Factor IX is present in two commercially prepared concentrates, known as factor IX complex concentrates and coagulation factor IX concentrates.
All persons with hemophilia should be immunized with hepatitis B vaccine. Suspected bleeding into the central nervous system must be promptly treated; when this happens, consultation with or transfer to a Hemophilia Treatment Center is mandatory. Early treatment of hemarthroses is essential for maintenance of joint health; infusions administered within 4 to 6 hours of onset of symptoms are sufficient to stop bleeding and restore joint function. Medically supervised home infusion therapy has become an integral part of the comprehensive care of patients with bleeding disorders and has facilitated the treatment of bleeding episodes outside the hospital setting.Patient Care. Advances in therapy have greatly improved the prognosis and management of hemophilia, but new issues have emerged, including the impact on immune status of purer factor concentrates, escalating financial considerations, and therapeutics for infections with hepatitis B, hepatitis C, and the human immunodeficiency virus. Multidisciplinary comprehensive care that incorporates patient and family educational strategies continues to be an essential element of care. Surgery and dental care require a team approach by individuals with specialized knowledge and expertise, in order to ensure favorable outcomes. A diagnosis of hemophilia presents many challenges, not the least of which are psychosocial issues.
Excellent sources of information for both professionals and nonprofessionals are the National Hemophilia Foundation, 110 Greene St., Suite 303, New York, NY 10012 (telephone 212-219-8180) and the Hemophilia and AIDS/HIV Network for the Dissemination of Information (“HANDI”) at the same address (telephone 800-42-HANDI).hemophilia A classical hemophilia, a sex-linked condition due to deficiency of coagulation factor VIII; see hemophilia" >hemophilia.hemophilia B a form similar to hemophilia A but due to a deficiency of coagulation factor IX; called also Christmas disease. See hemophilia" >hemophilia.hemophilia C an inherited disorder caused by a lack of coagulation factor XI.. It has been observed mostly in persons of Ashkenazi Jewish ancestry and is characterized by recurring episodes of minor bleeding and mild bruising, severe prolonged bleeding after surgical procedures, and prolonged recalcification and partial thromboplastin times. Called also plasma thromboplastin antecedent deficiency, PTA deficiency, and Rosenthal syndrome.he·mo·phil·i·a B [MIM*306900-various] a clotting disorder resembling hemophilia A, caused by hereditary deficiency of factor IX; also seen as an X-linked recessive condition in the Cairn terrier breed of dogs. Synonym(s): Christmas diseaseChristmas diseasen. A type of hemophilia that is caused by a deficiency of factor IX.An X-linked recessive hemophilia, seen in 1/50,000 men, due to a defect in coagulation factor IX
Management Factor IX concentratesChristmas disease Hemophilia B Hematology An X-R hemophilia, seen in 1/50,000 ♂, due to a defect in coagulation factor IX Clinical Easy bruising, nosebleeds, bleeding gums, muscle hematomas, hemarthrosis Management Factor IX concentrates. See Factor IX deficiency. he·mo·phil·i·a B (hē'mō-fil'ē-ă) A clotting disorder resembling hemophilia A, caused by hereditary deficiency of factor IX.
Synonym(s): Christmas disease, haemophilia B. Christmas disease HAEMOPHILIA caused by absence of Factor IX (CHRISTMAS FACTOR).Christmas, Stephen, patient with the first case of this disease studied in detail. Christmas disease - a clotting disorder caused by hereditary deficiency of factor IX. Synonym(s): hemophilia BChristmas factor - Synonym(s): factor IX coagulation factorhe·mo·phil·i·a B (hē'mō-fil'ē-ă) [MIM*306900-various] Clotting disorder resembling hemophilia A, caused by hereditary deficiency of factor IX.
Synonym(s): Christmas disease, haemophilia B. Patient discussion about Christmas diseaseQ. A christmas wish for each of you! To have all the presents in the world is not my desire for you!May your Christmas gift from me today be a sincere prayer that you will know:Peace that makes you sleep like a babyJoy that makes you laugh like a foolHappiness that lets you forget the size of your problemsHope that makes impossible dreams come trueLove that makes you give from your heartForgiveness when ‘you know not what you do”!Kindness that brings favor wherever you goAnd health that makes you act the age you choose.A. Happy Christmas, everybody.. May all the joy of this wonderful season follow our life in upcoming year ahead..
Stay healthy always.. More discussions about Christmas diseaseChristmas disease
Related to Christmas disease: haemophilia, Hemophilia C, Von Willebrand disease, HæmophiliaSynonyms for Christmas diseasenoun a clotting disorder similar to hemophilia A but caused by a congenital deficiency of factor IXSynonyms- haemophilia B
- hemophilia B
Related Words- bleeder's disease
- haemophilia
- hemophilia
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