Optical system design for plastic aspherical doorscope;

Study on glottis and corniculate tubercle with the relationship between them;

Objective:To measure the glottic cross-sectional area, the maximal width of posterior glottis and the angle between bilateral vocal cords in dyspnea degree Ⅰ and Ⅱ caused by adult bilateral vocal cord paralysis, so as to provide quantitative index for dyspnea degree Ⅰ and Ⅱ.

Glottic measurement and vocal evaluation bofore and after adult arytenoidectomy;

Expression of Androgen Receptor and Estrogen Receptor in Glottic and Supraglottic Carcinoma of Larynx;

Objective To investigate the curative effect and laryngeal functional recovery of the glottic cancer patients by supracricoid partial laryngectomy.