[The impact of early short-range olfactory training and visual stimulation on olfactory identification function and quality of life in patients undergoing functional endoscopic sinus surgery].

Objective: To investigate the effects of short-term olfactory training and visual stimulation on olfactory recognition function and quality of life in patients following functional endoscopic sinus surgery (FESS). Methods: A total of 80 patients who underwent FESS in the Department of Otorhinolaryngology Head and Neck Surgery at the Affiliated Hospital of Xuzhou Medical University between December 2023 and February 2024 were enrolled in this study. The cohort comprised 67 males and 13 females, aged from 17 to 75 years. Participants were randomly allocated to either a control group (n=40) or an experimental group (n=40). The participants in control group received routine postoperative management, including nasal irrigation, oral antibiotics and glucocorticoids, topical budesonide nasal spray, and hypertonic saline solution for 12 weeks. In addition to the standard care, the participants in experimental group underwent olfactory-visual stimulation training starting 24 hours postoperatively, lasting for 2 weeks. The olfactory identification test (OIT), visual analogue scale (VAS) for olfaction and Questionnaire of Olfactory Disorders of Life (QOD-QoL, hereafter referred to as QOD) were administered preoperatively. Follow-up assessments were performed 2 weeks and 3 months postoperatively, with the same tests repeated. Data were analyzed using SPSS 27.0 and GraphPad Prism 7 statistical software. Results: There was no significant difference in preoperative OIT, VAS, and QOD scores between the two groups. The olfactory recognition function of some patients was improved after removing the packing material 24 hours after FESS surgery. The OIT scores of 2 weeks post-surgery were significantly higher than preoperative values in both groups (the experimental group Z=-4.73, P<0.001; the control group Z=-4.73, P<0.001). Participants in both groups showed improvements in olfactory VAS and QOD scores (experimental group Z value was -2.88 and -5.45, P<0.01 and<0.001, respectively; the control group Z value was -4.42 and -5.50, respectively, both P<0.001). However, there was no significant difference in the VAS score between the two groups (Z=-0.68, P=0.499). The paticipants in experimental group showed greater improvement in OIT and greater reduction in QOD scores compared to the control group (Z=-2.19, P=0.029; Z=-2.99, P=0.003). There was no significant difference in the decrease of olfactory VAS between the two groups (Z=-0.02, P=0.988). There were no statistically significant differences of all patients in VAS, OIT and QOD scores at 2 weeks and 3 months after surgery (experimental group Z value was -0.91, -0.90 and -1.43, respectively, all P>0.05; control group Z value was -1.21, -0.84 and -0.91, respectively, all P>0.05). At 3 months post-surgery, the OIT scores in the experimental group were higher, the QOD scores were lower than those in the control group (Z=-2.89, P=0.004; Z=-2.87, P=0.004). Conclusion: Short-term olfactory-visual stimulation training in the early postoperative period of FESS significantly improves the olfactory recognition function and enhances the quality of life of patients.