Abstract:
Objectives - To study the safety of menatetrenone in children with osteogenesis imperfecta and to study the effects of menatetrenone on bone mineral density and number of fracture. Design - Prospective analytic study. Setting - Pediatric outpatient department, King Chulalongkorn Memorial hospital. Patients - 5 Osteogenesis imperfecta patients who were treated at King Chulalongkorn Memorial hospital, during March 2006-March 2007. Methods - Previous treatment history and general data including age, sex, weight, height and number of fracture were reviewed. Blood samples, bone survey, bone mineral density and fracture rate were obtained before and after menatetrenone administration. Collective data's were analyzed and correlated to previous treatment history and patient data. Results - 5 Patients were enrolled in this study. Mean patient age was 2 years and 7 months old. There was no change in serum BUN, calcium and phosphate level before and after menatetrenone administration. Overall 3 of 5 patients had an increase in bone mineral density and a decrease in fracture rate from 1.7048 to 0.8 times per year, but there was no statistically significant change. Conclusion - No adverse effect was observed during menatetrenone treatment in children with osteogenesis imperfecta. A one year study reveals increased bone mineral density and decreased fracture rate, but statistical insignificance. Continued follow-up will help delineate the response to therapy over time.