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Nystagmus Assessment for Patients Consulting in the Emergency Department for Acute Vertigo

NCT05176015 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 120

Last updated 2026-03-18

No results posted yet for this study

Summary

This pilot study is perfomed to validate and document faisability of the use of Frenzel lens and the use of a diagnostic algorithm for the assessment of a special sign (nystagmus) observe in the eyes of patients consulting in the emergency department (ED) for an acute episode of vertigo/dizziness/imbalance.

Conditions

  • Nystagmus, Acquired
  • Stroke, Acute

Interventions

DEVICE

Frenzel Lens

pair of magnifying glasses (+20 dioptres) that are worn by the patient and an illuminating system. On using Frenzel goggles, the nystagmus is better seen as a result of eyes being magnified and inhibition of visual fixation.

DIAGNOSTIC_TEST

Diagnostic Algorithm

A diagnostic algorithm using the TiTrate approach: continuous, Intermittent, trigger or spontaneous. The diagnostic algorithm use the REDCap software that include different videos to illustrate diagnostic tests and nystagmus types. Different maneuvers: HINTS+ battery, Dix-Hallpike test, Supine Roll test. Different Particle Repositioning Techniques will be proposed according to specific tests: Epley and Gufoni maneuvers. Risk Score is used to assess stroke risk for transient ischaemic attack (TIA): ABCD2 and the Canadian TIA Risk Score

Sponsors & Collaborators

  • CHU de Quebec-Universite Laval

    lead OTHER

Principal Investigators

  • Pierre La Rochelle, MD, MSc · Universite Laval

Study Design

Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
100 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2022-01-15
Primary Completion
2025-02-10
Completion
2025-02-10

Countries

  • Canada

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05176015 on ClinicalTrials.gov