Abstract:Objective To investigate the effective value of treating fungal maxillary sinusitis with rectangular fenestration in the lateral wall of nasal passage under nasal endoscope.Methods 200 cases of fungal maxillary sinusitis from January 2015 to December 2019 were selected as the research subjects. The observation group (n = 100) was treated with rectangular fenestration at the lateralis wall of nasal passage under nasal endoscope, and the control group (n = 100) was treated with prelacrimal recess approach under nasal endoscope. The operation time, blood loss and complications were observed.Results The treatment group: the intraoperative bleeding was 64 ~ 100 mL, with an average of (78.5 ± 8.4) mL, the operation time was 17 ~ 43 min, with an average of (29.5 ± 5.8) min. The patients were followed up for one year, one case of empty nose syndrome, and the cure rate of the treatment group was 99.0%. Control group: the intraoperative blood loss was 62~108 mL, with an average of (81.4 ± 8.5) mL, the operation time was 18~51 min, with an average of (32.4 ± 6.5) min. The patients were followed up for one year, and the complications were: lacrimal effusion (1 case), nasal adhesions (1 case), nasal stenosis (1 case), empty nose syndrome (2 cases), the cure rate was 98.0%. There were significant differences in the intraoperative bleeding volume and the average operation time between the two groups (P < 0.05). There was no significant difference in complications rate between the two groups (P > 0.05).Conclusion Endoscopic rectangular fenestration of the lateral wall of the inferior nasal passage in the treatment of fungal maxillary sinusitis is simple with short time and less bleeding, safe and effective, which is worthy of clinical application.