Electrical Enclosure Comparisons of NEMA and UL Type Rating Standards. When it comes to electrical safety in the USA there are two main organizations who set safety standards: NEMA (the National Electrical Manufacturers Association) and UL (Underwriters Laboratories). NEMA is the association of electrical equipment and medical imaging manufacturers in the United States.
View of the Liver and Gallbladder. Bile empties from the gallbladder into the common bile duct. The common bile duct joins with the pancreatic duct to form the ampulla of Vater, which empties into the duodenum. Before joining the pancreatic duct, the common bile duct tapers to a diameter of â¤ 0.6 cm. The sphincter of Oddi, which surrounds both the pancreatic duct and the common bile duct, includes a sphincter for each duct. Bile does not normally flow retrograde into the pancreatic duct.
The gallbladder is a blind pouch that leads, via a neck, to the cystic duct. The tests revealed a blocked cystic duct preventing bile from entering the common bile duct and causing colicky, spasmodic pain, especially after eating. The bile duct was found intact and the cystic duct clips secure. Gallstones can remain in the gallbladder itself or migrate to cystic duct or the common bile duct. 2-4) Aberrant right sectoral ducts usually drain into the common hepatic or cystic duct (Fig.