Trachea emergency situation, and this is a cricothyrotomy. Tracheal agenesis, is a rare birth defect in which the trachea fails to develop. The defect is usually fatal though sometimes surgical intervention has been successful. A tracheoesophageal fistula is a congenital defect in which the trachea and esophagus are abnormally connected. Sometimes as an anatomical variation one or more of the tracheal rings are completely formed. These "O" rings are smaller than the normal C-shaped and can cause narrowing of the trachea resulting in breathing difficulties. An operation called a "slide tracheoplasty" can be performed which opens up the rings and rejoins
Spelling of Shakespeare's name centre is most commonly used, and why it is sometimes hyphenated. Kathman argues that any name that could be divided into two clear parts was liable to be hyphenated, especially if the parts could be interpreted as distinct words. Later editions of Shakespeare's works adopted differing spellings, in accordance with fashions of modernised spelling of the day, or, later, of attempts to adopt what was believed to be the most historically accurate version of the name. When he was referred to in foreign languages, he acquired even more variant spellings. 18th-century French critics were known to use "Shakpear, Shakespehar, Shakespeart,