Generally, the stage of intubation that takes the longest amount of time is the observation of the opening of the glottis
. In obese patients undergoing bariatric surgery, Yumul R et al.
The authors who wrote on the voice took their ideas of what the action of the healthy, living glottis
might be from glimpses they caught of it through wounds, or from experiments on dead bodies, or from vivisectional researches.
The cuffed Mallinckrodt ETT (ID 5.0 mm) could not pass the glottis
or subglottis, including the cricoid, which had an internal transverse width of 7.8 mm.
 Whereas in case of Truview EVO2 video laryngoscope, its angulated blade enables glottis
visualisation without aligning the oral, pharyngeal and laryngeal axes.
Blade (Group II), to see the glottis
and intubation was done with appropriate size of endotracheal tube.
This case demonstrates that a goitre which extends dorsally also causes difficult tracheal intubation because of elevation of the glottis
. Careful preoperative evaluation by CT scan is therefore important in cases of giant goitre.
Hoarseness was the most common presenting symptom signifying a predilection for the glottis
, as seen in our case also.
A loop of a rubber band was clearly visible in the supraglottis and extending through the glottis
in an anterior-posterior orientation with one arm in the anterior commissure.
Under the view of the McGrath [R] video laryngoscope, the glottis
was not visible.
Most of these studies have focused on pacing of vocalis muscles for bilateral VCP; for example, electrical stimulus to the paralyzed posterior cricoarytenoid (PCA) muscles in human larynx has induced vocal fold abduction and restored ventilation through the glottis
in case of bilateral laryngeal paralysis .
All 5 patients were found to have laryngeal lesions via laryngoscopy, which mostly involved the glottis