tube

(tab) (L. tuba, tub us]. An elongated hollow cylindric organ or instrument. air-t., any tubular pa age of the respiratory apparatus. auditory t., the eustachian tube. auscultatory t., a tubular instrument used in testing the sense of hearing. Bellini’s t’s, the connecting tubes of the kidney. See tubule, uriniferous. Bellocq’s t. Sce Bellocg’s canmula, under cannula. Bochdalek’s t’s, cecal cavities connected with the thyroglo al duct, together with which they usually disappear soon after birth. Bouchut’s t’s, a set of tubes for use in the intubation of the larynx. Bowman’s t’s, corneal t's, tubes formed artificially between the lamelle of the cornea in the proce of injection. t.-casts. See cast. cerebromedul- t., a tube of the embryo, formed by the inverted epiblast, from which the cerebrospinal axis is developed; the neural canal. Chau ier’s t., a trumpet-shaped tube for performing insufflation of the lungs. collecting t’s. See uriniferous tubules, under tubule. corneal t., a tubelike pa age sometimes seen between the layers of the cornea. Crookes’ t., an exhausted vacuum tube in which the rarefaction is carried to such a degree that molecular actions have free play: it is used in obtaining Réntgen rays. See Réntcen rays. Débove’s t., a tube for lavage of the stomach, marked so as to show when it has reached that organ. Depaul’s t.,a tube fo tuber (tu’ber) performing insufflation of the lungs. Dominici’s t., a tube of silver for applying radium emanations which permits the pa age of the Band y-rays only. drainage-t., a tube used in surgery to facilitate the escape of fluids. Esmarch’s t’s, tubes used in making roll cultures of bacteria. esophageal t., a soft, flexible tube for lavage of the stomach and forcible feeding. eustachian t., the pa age from the nasopharynx to the tympanum. It is from 14 to 2 inches long, and is made up of a bony part, situated in the temporal bone, and a cartilaginous part, ending in the pharynx. Its purpose is to equalize the air-pre ure within the tympanum with that of the external air. fallopiant. See oviduct. feeding t., a tube for introducing food into the stomach. Ferrein’s t’s, the convoluted uriniferous tubules. fusion t's, a pair of tubes used in observing and cultivating the power of fusion in eyes affected with hetero pho ria. Gei ler’s t., a tube containing a highly rarefied gas. granulation-t., a laryngeal intubation tube with a large head which covers any granulations that may have been formed about the wound. Henle’s looped t’s. See uriniferous tubules, under ‘ubue. intubation t., tra-