Age and sex influence on formation of gastroesophageal reflux disease in children with chronic gastroduodenitis

The research goal is to investigate age and sex influence on formation of gastroesophageal reflux disease in children with chronic gastroduodenitis. Material and Methods. Features of acidity in esophagus and cardial part of stomach was studied in 175 children aged 4 to 17 years with chronic gastroduodenitis by pH-monitoring. pH-monitoring was carried by «Gastroscan-24». Age and sex characteristics have been identified on examination results. Results. Children of preschool age experience the most unfavorable reflux from the stomach to the esophagus. Boys experience the pathological reflux more severely. Conclusions: Effectiveness of esophageal clearance is lower in children of preschool age. Pathological reflux progresses are more favorably in a standing position, especially in children of preschool age. Pathological reflux occurs more often in the supine position and has a longer and more aggressive course in preschool age boys

Adaptive Control Over the Permanent Characteristics of a Wind Turbine

AbstractHerein is proposed a system for adaptive speed control of the permanent characteristics of a wind turbine to ensure safe operation thereof. The design of wind turbines is generally calculated with the nominal power generation at a wind speed of 11 m/s, and it should be controlled at higher wind flow velocities. Rotation speed is the main control parameter of wind turbine system. In addition, the control system can provide normalized thermal conditions for the alternator and prevents exceeding vibration level. Adaptive control system contains mechanical and electromechanical modules intended for braking rotor using friction components. There is also a structure diagram of control system and transfer functions of system components

Juvenile rheumatoid arthritis and del(22q11) syndrome: a non-random association.

Del(22q11) is a common microdeletion syndrome with an extremely variable phenotype. Besides classical manifestations, such as velocardiofacial (Shprintzen) or DiGeorge syndromes, del(22q11) syndrome may be associated with unusual but probably causally related anomalies that expand its phenotype and complicate its recognition. We report here three children with the deletion and a chronic, erosive polyarthritis resembling idiopathic cases of juvenile rheumatoid arthritis (JRA). Patient 1, born in 1983, initially presented with developmental delay, facial dysmorphism, velopharyngeal insufficiency, and severe gastro-oesophageal reflux requiring G tube feeding. From the age of 3 years, he developed JRA, which resulted in severe restrictive joint disease, osteopenia, and platyspondyly. Patient 2, born in 1976, had tetralogy of Fallot and peripheral pulmonary artery stenosis. She developed slowly, had mild dysmorphic facial features, an abnormal voice, and borderline intelligence. JRA was diagnosed at the age of 5 years. The disorder followed a subacute course, with relatively mild inflammatory phenomena, but an extremely severe skeletal involvement with major osteopenia, restrictive joint disease (bilateral hip replacement), and almost complete osteolysis of the carpal and tarsal bones with phalangeal synostoses, leading to major motor impairment and confinement to a wheelchair. Patient 3, born in 1990, has VSD, right embryo-toxon, bifid uvula, and facial dysmorphism. She developed JRA at the age of 1 year. She is not mentally retarded but has major speech delay secondary to congenital deafness inherited from her mother. In the three patients, a del(22q11) was shown by FISH analysis. These observations, and five other recently published cases, indicate that a JRA-like syndrome is a component of the del(22q11) spectrum. The deletion may be overlooked in those children with severe, chronic inflammatory disorder