Abstract:Objective To explore the effect of postoperative voice rest duration on voice function in patients with unilateral small polyp of vocal cord.Methods A total of 120 patients undergoing surgical treatment of unilateral small polyp of vocal cord in our department were included. Before operation, all the patients were given voice hygiene education and guidance of vocalization training, as well as acoustic analysis including fundamental frequency perturbation (Jitter), fundamental frequency perturbation (Shimmer), maximum phonation time (MPT), dysphonia severity index (DSI), roughness, breathiness and hoarseness (RBH), voice handicap index (VHI), etc. They were randomly divided into 3 groups with 40 cases in each according to the postoperative voice rest duration on the basis of routine treatment (health education, surgical treatment, and medical treatment). The postoperative voice rest durations were 3 days, 7 days and 2 weeks in group A, B and group C respectively. All patients had voice training for 8 weeks after voice rest. At 3 and 6 months after operation, acoustic analysis was performed respectively. The post-treatment voice acoustic parameters were compared with the preoperative ones and among different groups, and their differences were analyzed.Results ①At 3 months and 6 months after surgery, the Jitter, Shimmer, VHI and RBH all decreased significantly compared with the preoperative ones in all groups, while the MPT, DSI increased significantly. The differences were statistically significant (P<0.05). ②At 3 months after surgery, the differences of Jitter, Shimmer, MPT, RBH, DSI, and VHI values between groups A and B, those of RBH, MPT, DSI, and VHI values between groups A and C, and those of DSI and VHI values between groups B and C were all statistically significant (all P<0.05). ③ In 6 months after surgery, the differences of Jitter, Shimmer, MPT, RBH, DSI, and VHI values between groups A and B, those of Shimmer, RBH, MPT, DSI, and VHI values between groups A and C, and those of DSI and VHI values between groups B and C were all statistically significant (all P<0.05).Conclusions On the basis of routine treatment, voice rest combined with voice training can improve the voice quality of patients. Postoperative voice rest with duration of 3 days is more conducive to the healing of vocal cord wound and the recovery of vocal function for patients with unilateral voice polyp.