Fig. 4From: A novel irrigation device with superior nasal irrigation efficiency to the classic rinse bottleThe rinse bottle's removal effect and irrigation efficiency under six different head positions. Each cast was filled with 5 ml simulated nasal mucous. The irrigation efficiency was volume-dependent, and the head positions significantly influenced the irrigation efficiency. A tiny amount of yogurt remained only in the olfactory cleft after irrigation with 240 ml waterBack to article page