Abstract: Objective To evaluate the effect of 1% iced lemonade spray at 0 ℃~4 ℃ on relieving thirst in patients after nasal endoscopic surgery. Methods A total of 144 inpatients in the otolaryngology department of a Grade A hospital in Fujian Province from March to August 2023 were selected as the study subjects by convenience sampling method. According to the order of admission time, patients receiving routine care from March to May 2023 were set as the control group, and those receiving iced lemonade spray from June to August 2023 were set as the test group. The scores of thirst, oral mucosa humidity and nursing service satisfaction were compared between the two groups before and after intervention at 0.5 h, 2 h, 4 h and 6 h. Results Before intervention, there was no significant difference in thirst score and oral mucosa humidity classification between 2 groups (P>0.05). At 0.5 h, 2 h, 4 h and 6 h after intervention, the thirst score of the experimental group was lower than that of the control group (P<0.001), and the thirst score of the experimental group gradually decreased with time (P<0.001), and there was an interaction between the groups and time (P<0.001). The oral mucosa moisture grade and nursing service satisfaction of experimental group were better than those of control group (P<0.05). Conclusion 1% iced lemon water spray at 0~4 ℃ can effectively reduce thirst, improve oral mucosa wetness and nursing service satisfaction compared with conventional cotton swabs.

Key words: thirst, nasal endoscopy, postoperative, nursing, lemon, atomizing