The prevalence of vitamin K deficiency varies by geographic region. For infants in the United States, vitamin K1 deficiency without bleeding may occur in as many as 50% of infants younger than 5 days old, with the classic hemorrhagic disease occurring in 0.25-1.7% of infants. Therefore, the Committee on Nutrition of the American Academy of Pediatrics recommends that 0.5 to 1.0 mg Vitamin K1 be administered to all newborns shortly after birth. Postmenopausal and elderly women in Thailand have high risk of Vitamin K2 deficiency, compared with the normal value of young, reproductive females. Current dosage recommendations for Vitamin K may be too low. The deposition of calcium in soft tissues, including arterial walls, is quite common, especially in those suffering from atherosclerosis, suggesting that Vitamin K deficiency is more common than previously thought. Because colonic bacteria synthesize a significant portion of the Vitamin K required for human needs, individuals with disruptions to or insufficient amounts of these bacteria can be at risk for Vitamin K deficiency. Newborns, as mentioned above, fit into this category, as their colons are frequently not adequately colonized in the first five to seven days of life. Another at-risk population comprises those individuals on any sort of long-term antibiotic therapy, as this can diminish the population of normal gut flora.
medical cause of Protein S deficiency
symptom of Protein S deficiency
symptom of Vitamin K deficiency
symptom of Haemophilia
medical cause of Disseminated intravascular coagulation
medical cause of Thrombotic thrombocytopenic purpura
symptom of Thrombotic thrombocytopenic purpura
symptom of Disseminated intravascular coagulation