Abstract Background The ability of saline irrigation to detach the mucous and the flow-limiting effect of the nasal valve has not been well explored. The objective of this study was to compare the removal efficiency of a novel irrigation device with an extended nozzle versus a classic rinse bottle. Methods Transparent casts of the unoperated sinonasal cavity were made by 3D printing. https://mljyaufya4xw.aioblogs.com/87843877/science-and-mathematics-teaching-through-local-games-in-preschools-of-botswana