Comparative effectiveness of the exact versus estimated angle of head position in the Epley maneuver: a randomized controlled trial

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

TCTR

Registry ID

TCTR20240720002

Enrollment

Registered

2024-07-20

Start date

2019-04-30

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Benign paroxysmal positional vertigo (BPPV) Posterior canal BPPV (PC-BPPV) Epley maneuver Benign paroxysmal positional vertigo (BPPV) Posterior canal BPPV (PC-BPPV) Epley maneuver

Interventions

Physicians performed each step of the Epley maneuver corresponding to the exact head angle shown on the head angle measuring device.,Physicians performed each step of the Epley maneuver by estimating

Experimental Device,Placebo Comparator No treatment

Exact head angle group,Estimated head angle group (traditional Epley maneuver)

Eligibility

Sex/Gender

All

Age

18 Years to 80 Years

Inclusion criteria

Inclusion criteria: Patients with positional vertigo confirmed the diagnosis by the Dix Hallpike maneuver.

Exclusion criteria

Exclusion criteria: 1.Patients with history of Meniere's disease, labyrinthitis and vestibular neuritis 2.Patients who used vestibular suppressants within 6 hours before performing the Dix Hallpike maneuver 3.Patients who contraindicate for Epley maneuver

Design outcomes

Primary

Measure	Time frame
Negative Dix Hallpike test 1 week FIsher's exact test	—

Secondary

Measure	Time frame
Severity of dizziness 1 week FIsher's exact test and Rank sum test	—

Countries

Thailand

Contacts

Public ContactSanathorn Chowsilpa

Faculty of Medicine, Chiang Mai University

sanathorn.c@cmu.ac.th053935562

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026