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. 2018 Sep 27;18:134. doi: 10.1186/s12871-018-0601-x

Fig. 2.

Fig. 2

Incision pain scores (VAS). Data are presented as median (range). Group R: the patients were recieved 6 ml of 0.75% ropivacaine for throat, glottic area and tracheal mucosa uniform spray; Group C: the patients were recieved with 6 ml of saline for throat, glottic area and tracheal mucosa uniform spray as control.*P < 0.05 compared with group C