choanal atresia

atresia

[ah-tre´zhah] congenital absence or closure of a normal body opening or tubular structure; see also obstruction. adj., adj atret´ic.anal atresia (atresia a´ni) imperforate anus.aortic atresia 1. congenital absence of the orifice" >aortic orifice.2. absence or closure of the orifice" >aortic orifice, a rare congenital anomaly in which the left ventricle is hypoplastic, so that oxygenated blood passes from the left into the right atrium through a septal defect, and the mixed venous and arterial blood passes from the pulmonary artery to the aorta by way of a patent ductus arteriosus.aural atresia absence of closure of the auditory canal.biliary atresia congenital obliteration or hypoplasia of one or more components of the bile ducts, resulting in persistent jaundice and liver damage.choanal atresia blockage of the posterior nares. When the blockage is bilateral in a newborn, it produces acute respiratory distress because neonates are nose-breathers. Diagnosis is confirmed if a catheter cannot be passed through the nares. Until surgery is done to relieve the obstruction, insertion of an airway may be necessary.esophageal atresia congenital lack of continuity of the esophagus, commonly accompanied by tracheoesophageal fistula, and characterized by accumulations of mucus in the nasopharynx, gagging, vomiting when fed, cyanosis, and dyspnea. Treatment should begin with suction of the upper esophageal pouch, followed by surgical repair by esophageal anastomosis and division of the fistula as soon as the infant's general condition permits.follicular atresia (atresia folli´culi) the normal death of the ovarian follicle when unfertilized.laryngeal atresia congenital lack of the normal opening into the larynx.mitral atresia congenital obliteration of the orifice" >mitral orifice; it is associated with hypoplastic left heart syndrome and transposition of great vessels.prepyloric atresia congenital membranous obstruction of the gastric outlet, characterized by vomiting of gastric contents only. Called also pyloric atresia.pulmonary atresia congenital severe narrowing or obstruction of the orifice" >pulmonary orifice, with cardiomegaly, reduced pulmonary vascularity, and right ventricular atrophy. It is usually associated with tetralogy of fallot, transposition of great vessels, or other cardiovascular anomalies.pyloric atresia prepyloric atresia.tricuspid atresia absence of the orifice" >tricuspid orifice, circulation being made possible by an atrial septal defect.

Tricuspid atresia, here displaying a ventricular septal defect and normally related great arteries, the arrows showing the altered flow of blood through the heart. From Dorland's, 2000. urethral atresia imperforation of the urethra.

cho·a·nal a·tre·si·a

atresia due to congenital failure of one or both choanae to open owing to the failure of the bucconasal membrane to involute. It results in nasal obstruction and, if bilateral, can endanger neonates because they are obligatory nasal breathers.

choanal atresia

Posterior choanal atresia ENT A partial or complete obstruction of bony–90% of cases or membranous passages from the nasal cavity to the nasopharynx, due to a persistent nasopharyngeal or buccopharyngeal membrane Management Transpalatal removal of obstruction and part of the posterior nasal septum, to prevent scarring; if membranous, probe perforation, laserization, cauterization may suffice.

cho·a·nal a·tre·si·a

(kōă-năl ă-trēzē-ă) Atresia due to congenital failure of one or both choanae to open owing to the failure of the bucconasal membrane to involute; results in nasal obstruction.

单词	choanal atresia
释义	DictionarySeeatresia choanal atresia atresia [ah-tre´zhah] congenital absence or closure of a normal body opening or tubular structure; see also obstruction. adj., adj atret´ic.anal atresia (atresia a´ni) imperforate anus.aortic atresia 1. congenital absence of the orifice" >aortic orifice.2. absence or closure of the orifice" >aortic orifice, a rare congenital anomaly in which the left ventricle is hypoplastic, so that oxygenated blood passes from the left into the right atrium through a septal defect, and the mixed venous and arterial blood passes from the pulmonary artery to the aorta by way of a patent ductus arteriosus.aural atresia absence of closure of the auditory canal.biliary atresia congenital obliteration or hypoplasia of one or more components of the bile ducts, resulting in persistent jaundice and liver damage.choanal atresia blockage of the posterior nares. When the blockage is bilateral in a newborn, it produces acute respiratory distress because neonates are nose-breathers. Diagnosis is confirmed if a catheter cannot be passed through the nares. Until surgery is done to relieve the obstruction, insertion of an airway may be necessary.esophageal atresia congenital lack of continuity of the esophagus, commonly accompanied by tracheoesophageal fistula, and characterized by accumulations of mucus in the nasopharynx, gagging, vomiting when fed, cyanosis, and dyspnea. Treatment should begin with suction of the upper esophageal pouch, followed by surgical repair by esophageal anastomosis and division of the fistula as soon as the infant's general condition permits.follicular atresia (atresia folli´culi) the normal death of the ovarian follicle when unfertilized.laryngeal atresia congenital lack of the normal opening into the larynx.mitral atresia congenital obliteration of the orifice" >mitral orifice; it is associated with hypoplastic left heart syndrome and transposition of great vessels.prepyloric atresia congenital membranous obstruction of the gastric outlet, characterized by vomiting of gastric contents only. Called also pyloric atresia.pulmonary atresia congenital severe narrowing or obstruction of the orifice" >pulmonary orifice, with cardiomegaly, reduced pulmonary vascularity, and right ventricular atrophy. It is usually associated with tetralogy of fallot, transposition of great vessels, or other cardiovascular anomalies.pyloric atresia prepyloric atresia.tricuspid atresia absence of the orifice" >tricuspid orifice, circulation being made possible by an atrial septal defect. Tricuspid atresia, here displaying a ventricular septal defect and normally related great arteries, the arrows showing the altered flow of blood through the heart. From Dorland's, 2000. urethral atresia imperforation of the urethra. cho·a·nal a·tre·si·a atresia due to congenital failure of one or both choanae to open owing to the failure of the bucconasal membrane to involute. It results in nasal obstruction and, if bilateral, can endanger neonates because they are obligatory nasal breathers. choanal atresia Posterior choanal atresia ENT A partial or complete obstruction of bony–90% of cases or membranous passages from the nasal cavity to the nasopharynx, due to a persistent nasopharyngeal or buccopharyngeal membrane Management Transpalatal removal of obstruction and part of the posterior nasal septum, to prevent scarring; if membranous, probe perforation, laserization, cauterization may suffice. cho·a·nal a·tre·si·a (kōă-năl ă-trēzē-ă) Atresia due to congenital failure of one or both choanae to open owing to the failure of the bucconasal membrane to involute; results in nasal obstruction.
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