Health TrialsbyHealthPanel

Reducing Vertigo Associated With MRI Machines

ConditionsVertigoDizziness
Trial statusRecruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18+
SponsorJohns Hopkins University

About this trial

Vertigo, dizziness, and imbalance are commonly reported by patients and technologists when near high-field strength magnets (\>4 Tesla, T) used for magnetic resonance imaging (MRI) (1-5) Prior research from the investigators has established that the mechanism is likely a Lorentz force occurring in the inner ear, as a result of interactions with normal electrical currents in the inner ear and the strong static magnetic field of the MRI machine. The investigators have recently developed preliminary data to suggest that slower rates of entry into the magnetic field can greatly attenuate the sensations of vertigo. The explanation for this is that the rates of vestibular adaptation exceed that of the stimulus, allowed a reduction or elimination of the symptoms of vertigo. The aim of this study is to recruit individuals who are already getting an MRI scan as part of other research studies to randomize the rate of entry into and exit from the static magnetic field (i.e., before and after imaging is performed). The usual rate of entry is 20 seconds. This will be increased to one, two or three minutes. The investigators will record subjective sensations of dizziness and vertigo associated with the entry into the MRI.

Eligibility criteria

This trial accepts healthy volunteers

Qualifiers

Participants who will be undergoing an MRI scan at a 7 Tesla MRI.

Disqualifiers

Exclusion criteria include pacemaker, defibrillator wires, metal implants, cochlear implants, or ferromagnetic surgical clips in the brain.

Pregnancy

Claustrophobia occurs in perhaps 5% of patients, and they will not proceed with the test. All subjects will fill out the routine pretesting MRI questionnaire.

Trial design

Design model

Parallel

Treatments tested in this trial

  • Rate of Entry

    Behavioral

    The participant will enter and exit the MRI scan at a slower rate than the manufacturer entry and exit.

Treatment groups

100 Participants
are divided into 4 treatment groups
Group A: Standard DurationNo intervention 0 interventions
Group B: 1-minute entryExperimental treatment 1 intervention
Group C: 2-minute entryExperimental treatment 1 intervention
Group D: 3-minute entryExperimental treatment 1 intervention

Trial outcomes

Primary outcomes

1

Prevalence of vertigo symptoms

Participants will report the presence and intensity of their vertigo. The presence or absence of vertigo for each group will be the primary outcome.

Time frame
During MRI up to 6 minutes

Secondary outcomes

1

Intensity of Vertigo

Participants will report the intensity of their vertigo symptoms when entering and exiting the MRI scan on a scale from 0 (no vertigo)-3 (severe vertigo) at 15 second intervals. 0=no vertigo, 1=mild vertigo, 2=moderate vertigo, 3=severe vertigo

Time frame
During MRI up to 6 minutes
2

Duration (seconds) of Vertigo

Participants will report the onset and cessation of their vertigo symptoms when entering and exiting the MRI scanner. The duration will be calculated in seconds.

Time frame
During MRI up to 6 minutes

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Johns Hopkins University

Lead sponsor

National Institute on Deafness and Other Communication Disorders (NIDCD)

Collaborator

Source ClinicalTrials.gov
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