Truncus arteriosus is a rare and complex congenital (present at birth) heart defect that develops during the first eight weeks of pregnancy.Truncus arteriosus occurs when the two main blood vessels, the aorta and the pulmonary artery, stay connected and fail to separate completely as the fetus develops.Truncus arteriosus is further complicated because another congenital heart defect, ventricular special defect (VSD), occurs with it.runcus arteriosus occurs when the two main blood vessels, the aorta and the pulmonary artery, stay connected and fail to separate completely as the fetus develops. Truncus arteriosus is further complicated because another congenital heart defect, ventricular special defect (VSD), occurs with it.
Escutcheon (furniture) An escutcheon (pronounced /ÉªËskÊtÊÉn/, i-SKUCH-Én) is a general term for a decorative plate used to conceal a functioning, non-architectural item. Escutcheon is an old French word derived from the Latin word scutum, meaning a shield. Escutcheons are most often used in conjunction with mechanical, electrical, and plumbing components and fixtures where a pipe, tube, or conduit passes through a wall [or other material] surface.
The escutcheon is used to bridge the gap between the outside diameter of the pipe and the inside diameter of the opening in said surface. A brass escutcheon plate. The upper disc is hinged, allowing it to swivel over the open keyhole, or aside to allow the keyhole to be used.n this case, it is an architectural item that surrounds a keyhole or lock cylinder, and is often part of a lockset. Escutcheons help to protect a lock cylinder from being drilled out or snapped, and to protect the surrounding area from damage and wear from the end of the key when it misses the keyhole.