Abstract
Background
Although different methods of nasal irrigation have been utilized, irrigation efficiency in nasal cavities has not been well assessed. The objective of this study was to develop an apparatus and procedure for evaluating the irrigation efficiency and to explore the optimal head position during irrigation.
Methods
Casts of the left sinonasal cavity from a healthy volunteer were made from high-resolution-computed tomography data using 3D printing with composite materials. An adjustable apparatus that allowed cast fixation at the different head positions was built. The yogurt was used to simulate mucus. The cast with 5 ml yogurt filled around the superior, middle, and inferior turbinate was fixed in six head positions including head tilt 10°, 45°, and 60° forward with or without leaning 30° to the right. The cast was irrigated with 120 ml, 175 ml, and 240 ml dyed water and was video recorded. The irrigation efficiency was calculated based on the weight difference of the cast before and after the irrigation.
Results
Most residual yogurt was located around the superior meatus after the irrigation under different volumes and head positions. The irrigation efficiency of the rinse bottle or the pulsatile device was volume dependent, with the highest irrigation efficiency under 240 ml water. When the left sinonasal cavity was irrigated, the head position of tilt 45° forward with leaning 30° to the right was the optimal head position for these two devices when compared to other positions. The pulsatile device with 240 ml water performed better than the rinse bottle with 240 ml water regarding the irrigation efficiency under the optimal head position (0.8700 ± 0.0138 vs 0.7536 ± 0.0099, p = 0.003).
Conclusions
The developed apparatus provided a potential method for evaluating the irrigation efficiency. The head position of tilt 45° forward with leaning 30° was suitable for patients to perform the nasal irrigation.
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Funding
Beijing Hospitals Authority Youth Program (QML20190617 to DW), Beijing Science and Technology Nova Program (Z201100006820086 to DW), Natural Science Foundation of China (82000954 to DW), and Beijing Hospitals Authority Clinical Medicine Development of Special Funding (XMLX202136 to DW).
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All authors have made substantial contributions to the conception, analysis, and interpretation of data in this article approved the submitted version and agreed both to be personally accountable for our contributions and to ensure that questions related to the accuracy or integrity of any part of the work, even ones in which we are not personally involved, are appropriately investigated, resolved, and the resolution documented in the literature.
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DW was an inventor of the apparatus for evaluating the efficiency of nasal irrigation. The rest of the authors declare that they have no relevant conflicts of interest.
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Supplementary Information
Below is the link to the electronic supplementary material.
Supplementary file1 (MP4 19558 KB) Video 1. Rinsing with the rinse bottle and the dynamic fluid flow within the left nasal cavity with pure dyed water (175 ml, head tilt 10 degrees forward with leaning 30 degrees to the right).
Supplementary file2 (MP4 24413 KB) Video 2. Rinsing with the pulsatile device and the dynamic fluid flow within the left nasal cavity with pure dyed water (240 ml, head tilt 10 degrees forward with leaning 30 degrees to the right).
Supplementary file3 (MP4 27082 KB) Video 3. Rinsing with the rinse bottle in the cast filled with simulated nasal mucus (175ml, head tilt 10 degrees forward with leaning 30 degrees to the right).
Supplementary file4 (MP4 23286 KB) Video 4. Rinsing with the pulsatile device in the cast filled with simulated nasal mucus (240 ml, head tilt 10 degrees forward with leaning 30 degrees to the right).
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Wu, D., Chang, F., Hong, J. et al. Development of an apparatus and procedure for evaluating the efficiency of nasal irrigation. Eur Arch Otorhinolaryngol 279, 3997–4005 (2022). https://doi.org/10.1007/s00405-021-07249-8
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DOI: https://doi.org/10.1007/s00405-021-07249-8