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Head and Bottle Angles Achieved by Patients During High-Volume Sinonasal Irrigations.

BACKGROUND: Certain head positions can optimize topical irrigation distribution to specific sinuses. No studies have assessed whether patients attain these positions when irrigating.

OBJECTIVE: The purpose of this study was to assess head and bottle angles achieved when patients irrigate based on instructions from an irrigation device or from a Rhinologist.

METHODS: Study approval was obtained from Henry Ford Health System's Institutional Review Board (10604). Forty-two patients with various rhinologic conditions were equally divided into groups based on irrigation instruction type: pictoral instructions from an irrigation device or written/verbal instructions from a Rhinologist. Both groups' instructions directed nose-to-floor head positioning. Simulating home irrigations, patients irrigated 120 mL of saline into each naris using 240 mL squeeze bottles. Frontal and lateral views were captured using video cameras. On frontal view, angles were measured between (1) nasal dorsum (ND) and bottle tip (BT; n = 84) and (2) ND and vertical (V; n = 84). On lateral view, angles were measured between (1) line from nasion-to-pogonion (NTP) and horizontal (H) (n = 73) and (2) NTP and BT (n = 73).

RESULTS: On lateral view, average angle between NTP and H was 20.0° (standard deviation [SD] = 13.1, 95% confidence interval [CI] = 17.0-23.0) and between NTP and BT was 59.4° (SD = 15.8, 95% CI = 55.8-63.1). On frontal view, average angle between ND and V was 9.5° (SD = 19.5, 95% CI = 5.3-13.6) and between ND and BT was 24.5° (SD = 12.0, 95% CI = 21.9-27.0). There were no significant angle differences between sides or instruction types.

CONCLUSION: When instructed to irrigate in the nose-to-floor head position, patients achieved a head position uprotated 20° on lateral view and vertex rotated 10° away from the side of irrigation on frontal view.

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