- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05176015
Nystagmus Assessment for Patients Consulting in the Emergency Department for Acute Vertigo
Randomized Controlled Trial on Nystagmus Assessment for Patients Consulting for Acute Vertigo in the Emergency Department With/Without Frenzel Lens With/Without Form: A Pilot Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Pierre La Rochelle, MD, MSc
- Phone Number: 418-856-7000
- Email: pierre.la-rochelle.med@ssss.gouv.qc.ca
Study Locations
-
-
Quebec
-
Amqui, Quebec, Canada, G5J 2K5
- Centre Hospitalier d'Amqui
-
La Pocatiere, Quebec, Canada, G0R 1Z0
- Hopital Notre-Dame-de-Fatima
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Matane, Quebec, Canada, G4W 2W5
- Centre Hospitalier de Matane
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Montmagny, Quebec, Canada, G5V 3R8
- Centre Hospitalier de Montmagny
-
St-Georges, Quebec, Canada, G5Y4T8
- Hopital St-Georges
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- New episode of acute vertigo/dizziness/imbalance occuring during the 28 last days
- Must be able to consent.
Exclusion Criteria:
- No traumatic context before symptoms onset
- No intoxication context
- Glycemia ≤ 3,0 mmol/L
- Only one participation is permitted
- Not able to speak adequately in French or English.
- Reachable for 3 month follow-up
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: No Frenzel Lens and No Diagnostic Algorithm
The emergency physician is performing the assessment of nystagmus and its interpretation as usual.
The Frenzel lens and the diagnostic algorithm are not used.
|
|
Experimental: Frenzel Lens with Diagnostic Algorithm
Frenzel lens will be applied on patients' eyes during different diagnostic maneuvers to assess if a nystagmus is present and if present describe its main characteristic. Without mentioning to patient, the emergency physician will use a diagnostic algorithm inspired from the TiTrATE approach to interpret the nystagmus and propose the need or the irrelevance for neuro-imaging |
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.
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 |
Experimental: Frenzel Lens without Diagnostic Algorithm
Frenzel lens will be applied on patients' eyes during different diagnostic maneuvers to assess if a nystagmus is present and describe its main characteristics.
No diagnostic algorithm will be used to interpret nystagmus.
|
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.
|
Experimental: No Frenzel Lens with Diagnostic Algorithm
Nystagmus assessment in different manoeuvres is performed without the use of Frenzel lens. Without mentioning to patient, the emergency physician will use a diagnostic algorithm inspired from the TiTrATE approach to interpret the nystagmus and propose the need or the irrelevance for neuro-imaging |
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 |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Rate of Nystagmus detection per participant
Time Frame: Day 0
|
During eye examination, nystagmus will be characterized according to prominent direction of the fast phase (patients' left, patients' right, up, down, rotational),with their clinical setting or trigger.
Overall rate of nystagmus detection by participant.
(Rate of typical nystagmus for benign paroxysmal positional vertigo in the Dix-Hallpike maneuver or Supine Head Roll Test.
Rate of nystagmus detection in the initial physical exam)
|
Day 0
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Rate of neuro-imaging per participant
Time Frame: From day 0 to 12 weeks
|
Any imaging to investigate acute intra-cerebral lesion and/or the neck/brain vascular.
anomaly : computed tomography imaging; computed tomography angiogram; magnetic resonance angiography; magnetic resonance imaging, vascular neck ultrasound imaging.
|
From day 0 to 12 weeks
|
Rate of acute vertigo/dizziness/imbalance related hospitalisation per participant
Time Frame: From day 0 to 12 weeks
|
Admission to hospital directly related to vertigo/dizziness/imbalance may be immediate to initial visit or delayed.
|
From day 0 to 12 weeks
|
Rate of New Stroke at 12 weeks
Time Frame: At 12 weeks
|
A stroke free status will be assessed by a validated questionnaire by telephone at tree months and all specialised consultations and neuroimaging will be reviewed for acute stroke diagnosis,
|
At 12 weeks
|
Initial managment self appreciation of patient presenting in the ED for an acute episode of vertigo/dizziness/imbalance
Time Frame: Day 0
|
Simple question answered on a likert scale at the end of the ED encounter.
0% worst, 100% best appreciation.
|
Day 0
|
Adverse Events
Time Frame: From day 0 to 12 weeks
|
Combination of stroke, death, neurosurgery, intervenional neuroradiology, thrombolytic therapy
|
From day 0 to 12 weeks
|
Emergency Department Length of stay
Time Frame: Day 0, from triage time to Emergency Department departure (admission or home discharge)
|
Time spent at the emergency department from triage to time of departure for hospital admission or for home discharge assessed up to 48 hours
|
Day 0, from triage time to Emergency Department departure (admission or home discharge)
|
Rate of acute stroke per participant
Time Frame: From day 0 to 12 weeks
|
Any acute stroke, hemorrhagic or ischemic, diagnosed by neuro-imaging: computed tomography or magnetic resonance imaging
|
From day 0 to 12 weeks
|
Rate of symptomatic central lesion per participant
Time Frame: From day 0 to 12 weeks
|
Any central lesion diagnosed by computed tomography or magnetic resonance imaging that may be related to the initial presentation of vertigo/dizziness/imbalance
|
From day 0 to 12 weeks
|
Rate of specialised consultations for vertigo/dizziness/imbalance per participant
Time Frame: From day 0 to 12 weeks
|
Any specialised consultations (neurology, ear nose and throat (ENT), cardiology or similar) to investigate the acute vertigo/dizziness/imbalance with the final diagnosis.
Sumarisation of final diagnosis.
|
From day 0 to 12 weeks
|
Rate of subsequent Emergency Department Visit for Vertigo/dizziness/imbalance per participant
Time Frame: From day 0 t0 12 weeks
|
Return visit to the emergency department for vertigo/dizziness/imbalance as chief complaint.
|
From day 0 t0 12 weeks
|
Rate of New Atrial Fibrillation
Time Frame: From day 0 to 12 weeks
|
Atrial fibrillation detected by the initial visit electrocardiogram or by long-term cardiac rhythm monitoring (Holter or loop recorder).
|
From day 0 to 12 weeks
|
Rate of the use of Particles Repositioning Technique
Time Frame: Day 0
|
Once Paroxysmal Positional Vertigo diagnosis is being diagnosed with the Dix-Hallpike test or with the Supine Head Roll test, the use of particles repositioning technique, Epley or Gufoni maneuvers, will be noted with their immediate impact on acute vertigo.
|
Day 0
|
Rate of Emergency Department Visit Return for Benign Paroxysmal Positional Vertigo according to Typical Nystagmus
Time Frame: From day 0 to 12 weeks
|
Rate of Emergency Department Visit Return for Benign Paroxysmal Positional Vertigo according to Typical Nystagmus: direction, duration
|
From day 0 to 12 weeks
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Pierre La Rochelle, MD, MSc, Universite Laval
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Pathologic Processes
- Cardiovascular Diseases
- Vascular Diseases
- Cerebrovascular Disorders
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Eye Diseases
- Neurologic Manifestations
- Disease Attributes
- Otorhinolaryngologic Diseases
- Labyrinth Diseases
- Ear Diseases
- Cranial Nerve Diseases
- Vestibular Diseases
- Sensation Disorders
- Ocular Motility Disorders
- Stroke
- Emergencies
- Vertigo
- Dizziness
- Nystagmus, Pathologic
Other Study ID Numbers
- MP-CIBSSSBSL-2021-03
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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