nasogastric tube (ng) insertion is a usual technique in any neonatal intensive care unit. this procedure is undertaken for the children who are in need of invasive care. sometimes, the insertion of nasogastric tube in infants with esophagus friable anatomy tissues may have some dangerous side effect, but such problems are not very common. esophageal perforation is a rare but known complication ...

Modern microwave and millimeter wave phased array antennas are attractive because of their ability to steer wave beams in space without physically moving the antenna element. A typical phased array antenna may have several thousand elements fed by a phase shifter for every antenna, which can steer the resulting array beam to different directions. Their low loss, low cost and lightweight phase s...

BACKGROUND Insertion of an intrauterine device (IUD) at different times or by different routes during the postpartum period may increase the risk of complications. METHODS We searched Medline, Lilacs and Cochrane Collaboration databases for articles in any language, between database inception until December 2008, which compared outcomes of postpartum IUD insertion time intervals. Search terms...