. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . FIG. 2943.—Mouth Gag. gag (Fig. 2943) is a powerful instrtnnent and need notbe used in young infants as it has the undesirable prop-erty of lacerating toothless gums. In addition to the regular tubes there are tubes espe-cially adapted to getting rid of loose are hollow cylinders of different sizes and of largecalibre (Fig. 2944), short enough not to push down themembrane and long enough to reach below the cricoid 195
. A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . FIG. 2943.—Mouth Gag. gag (Fig. 2943) is a powerful instrtnnent and need notbe used in young infants as it has the undesirable prop-erty of lacerating toothless gums. In addition to the regular tubes there are tubes espe-cially adapted to getting rid of loose are hollow cylinders of different sizes and of largecalibre (Fig. 2944), short enough not to push down themembrane and long enough to reach below the cricoid 195 REFERENCE HANDBOOK OF THE MEDICAL SCIENCES. oonstriftion. Tlioy Imvo no retaining swell and it istlicrcfoR nifcssaiy to nsctlie largest size possible, wedg-ing it into the larynx. On uo account should these tubes. Fio. :ifl-i4.—Fulse Mcnibrarn- Tube, fitted to special cibturatx^r and intrtxhu^er be left in position for more llian a few hours, asthe pressure caused by them will do great dam-age to the tubes (Fig. 2040. No. I.) are constructedfor cases in which prc\ io\is intubalion has caused theformation of granulation tissue about the larynx. Thc_ydilVcrfrom l\w ordinary tubes in liaviug a large built-uphead, which rides above the granulations and by pressuretends to hasten their absorjitiou. With the exeejition of the short tube of Bayeux, whichpossesses the sole advantage of being better adapted to ments, many of which have been discarded as useless andall are totally unnecessary. The ODwyer instrumentsas made by a reliable manufacturer, meet all the require-ments for which they wereintended. The vast majorit}- ofcases requiring intubationarc due to laryngeal diph-theria. Other conditionslarely requiring the oper-ation are pseudo-diphtheria(streptococcus) of the la-rynx,
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