A ton of refrigeration (TR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.
A brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke. High blood pressure. 2  The risk of subarachnoid hemorrhage is greater in people who have a history of high blood pressure. 3  Smoking. 4  In addition to being a cause of high blood pressure, the use of cigarettes may greatly increase the chances of a brain aneurysm rupturing.
Brain Aneurysm Repair. Brain aneurysm repair is a surgical procedure used to treat a bulging blood vessel in the brain that is at risk of rupturing or tearing open. An aneurysm occurs when the wall of a blood vessel becomes thin and bulges or balloons out.Many aneurysms remain undetected because they often produce no symptoms until they rupture. This is a serious medical problem that, left untreated, could lead to stroke or brain damage.nderstanding the Basics of Brain Aneurysms. When a blood vessel is weakened or becomes thin, it risks tearing open or rupturing. This weakened or bulging vessel could rupture at any time. If a blood vessel in your brain ruptures, it would cause bleeding in the brain or stroke.