12 Key and Core Catalog With a mechanical key system, the level of security is determined by masterkey control. A masterkey system enables facilities of any size to manage the building by defining access by person and by area in increasing levels of complexity. Since BEST invented the standard for masterkey systems, there is no
When they occur in the upper part of the aorta, they are called thoracic aortic aneurysms. Aneurysms can occur anywhere in the thoracic aorta, including the ascending aorta near the heart, the aortic arch in the curve of the thoracic aorta and the descending aorta in the lower part of the thoracic aorta.
Esophageal dilatation is a medical procedure used to widen a narrowed part of the esophagus. The esophagus is a long tube that leads from the mouth to the stomach, and is used in swallowing and carrying foods or liquids.When the esophagus narrows, it becomes hard to swallow, and causes discomfort or pain.he esophagus is a long tube that leads from the mouth to the stomach. The potential complications of an esophageal dilatation include chest pain and fever. A balloon endoscope may be used to dilate the esophagus to a normal width. An esophagaeal dilatation procedure might include endoscopy.