Study: NCT05531630

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Nasal rinsing with saline 0.9%
Description: Nasal irrigations with saline (NaCl 0.9%) are considered golden standard in the treatment of chronic rhinosinusitis. Sachets consisting of mixtures for saline solutions, produced by DOS Medical®, consist of 1.875g sodium chloride and 0.625g sodium bicarbonate (figure 5). The content of the sachet has to be dissolved in 250mL heated water (lukewarm drinking water, max 37°C) in a NasoFree® nasal irrigator (Figure 4). Afterwards, the solution has to be mixed according to the instructions, the temperature has to be tested on the palm or forearm and afterwards, the product can be used. The patient will be asked to rinse their nose with the saline solution, once daily, for six weeks.~The sachet with rinsing salt is considered to be a class I medical device and has a CE-label (CNK number 3309028).

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Nasal rinsing with saline 0.9%
Description: Nasal irrigations with saline (NaCl 0.9%) are considered golden standard in the treatment of chronic rhinosinusitis. Sachets consisting of mixtures for saline solutions, produced by DOS Medical®, consist of 1.875g sodium chloride and 0.625g sodium bicarbonate (figure 5). The content of the sachet has to be dissolved in 250mL heated water (lukewarm drinking water, max 37°C) in a NasoFree® nasal irrigator (Figure 4). Afterwards, the solution has to be mixed according to the instructions, the temperature has to be tested on the palm or forearm and afterwards, the product can be used. The patient will be asked to rinse their nose with the saline solution, once daily, for six weeks.~The sachet with rinsing salt is considered to be a class I medical device and has a CE-label (CNK number 3309028).

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Nasal rinsing with Xylitol
Description: Xylitol is a sugar-alcohol that is already implemented in the treatment of patients with (difficult-to-treat) chronic rhinosinusitis. Some (pilot) studies have already showed a positive effect in CRS patients without cystic fibrosis. Xylitol nasal rinsing salt, produced by DOS Medical®, is a mixture of 4g Xylitol, 1.875g sodium chloride, 0.625g sodium bicarbonate and 0,03g mint (Figure 3). The content of the sachet has to be dissolved in 250mL heated water (lukewarm drinking water, max 37°C) in a NasoFree® nasal irrigator (Figure 4). Afterwards, the solution has to be mixed according to the instructions, the temperature has to be tested on the palm or forearm and afterwards, the product can be used. The patient will be asked to rinse their nose with the Xylitol solution, once daily, for six weeks.~The sachet with rinsing salt is considered to be a class I medical device, has a CE-label (CNK number 3309036) and is already commercially available in Belgium and The Netherlands.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Nasal rinsing with Xylitol
Description: Xylitol is a sugar-alcohol that is already implemented in the treatment of patients with (difficult-to-treat) chronic rhinosinusitis. Some (pilot) studies have already showed a positive effect in CRS patients without cystic fibrosis. Xylitol nasal rinsing salt, produced by DOS Medical®, is a mixture of 4g Xylitol, 1.875g sodium chloride, 0.625g sodium bicarbonate and 0,03g mint (Figure 3). The content of the sachet has to be dissolved in 250mL heated water (lukewarm drinking water, max 37°C) in a NasoFree® nasal irrigator (Figure 4). Afterwards, the solution has to be mixed according to the instructions, the temperature has to be tested on the palm or forearm and afterwards, the product can be used. The patient will be asked to rinse their nose with the Xylitol solution, once daily, for six weeks.~The sachet with rinsing salt is considered to be a class I medical device, has a CE-label (CNK number 3309036) and is already commercially available in Belgium and The Netherlands.