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The Bentall procedure is a type of cardiac surgery involving composite graft replacement of the aortic valve, aortic root, and ascending aorta, ...
For example, if the scale developer observes that raw scores 0-3 comprise 2% of the population, then these raw scores will be converted to a sten score of 1 and a raw score of 4 (and possibly 5, etc.) will be converted to a sten score of 2. This procedure is a non-linear transformation that will normalize the sten scores and usually the ...
Common features of both techniques of the replacement process are the clamping of the aorta and the use of a length of Dacron tube (also known as an "aortic graft"), typically 5 cm, to constrict the aortic root to the normal diameter, while the patient is cooled to 20°C and placed on life support. The procedure typically takes 4 to 6 hours in ...
The force of the blood entering the media causes the tear to extend. It may extend proximally (closer to the heart) or distally (away from the heart) or both. The blood travels through the media, creating a false lumen (the true lumen is the normal conduit of blood in the aorta). Separating the false lumen from the true lumen is a layer of ...
Obituary – Hugh Bentall, 1920-2012, Times Higher Education, London, 11 October 2012; Bentall Procedure for Giant Ascending Aortic Aneurysm VIDEO; Obituary - William "Bill" Cleland, The Guardian, London, 21 May 2005. Author Hugh Bentall; Obiturary - Hugh Henry Bentall BMJ2012 345:e8010, 8 December 2012
Bishop score, also Bishop's score or cervix score, is a pre-labor scoring system to assist in predicting whether induction of labor will be required. [1] It has also been used to assess the likelihood of spontaneous preterm delivery. [ 2 ]
The Mustard procedure was developed in 1963 by Dr. William Mustard at the Hospital for Sick Children. It is similar to the previous atrial baffle used with a Senning procedure , the primary difference being that the Mustard uses a graft made of Dacron or pericardium , while the Senning uses native heart tissue.
The term normal score is used with two different meanings in statistics. One of them relates to creating a single value which can be treated as if it had arisen from a standard normal distribution (zero mean, unit variance). The second one relates to assigning alternative values to data points within a dataset, with the broad intention of ...