An interventional study of rotatory chair testing in a velocity step protocol. in Seasickness, sponsored by Medical Corps, Israel Defense Force. Completed at 1 site in Israel. Open to male participants aged 18 Years to 20 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-12-14.
Sponsored by Medical Corps, Israel Defense Force · Not applicable, Interventional, and Diagnostic
Participants were selected from the military navy crewmembers prior to commencing of active sailing.
A vestibular time constant was calculated based on velocity step testing on a rotatory chair at baseline, 3 months and 6 month following active sailing duty.
A seasickness questionnaire (WIKER) was completed during follow-up visits. study participants were divided to three groups based on WIKER score - susceptible , non-susceptible and habituating. Vestibular time constant was compared between study groups.
50 studies on the registry are indexed under Motion Sickness; 9 are open to participants now.
This study's enrollment of 67 is above the median of 59 across 44 interventional studies indexed under Motion Sickness.
Browse Motion Sickness studies →Medical Corps, Israel Defense Force is the lead sponsor of 33 studies on the registry; 3 are open to participants now.
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Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
All study participants underwent rotatory chair testing in a velocity step protocol to determine the Vestibular time constant. testing were preformed at baseline, before commencing active duty on a ship, 3 month and 6 month follow up after the beginning of active sailing.
Diagnostic Test: rotatory chair testing in a velocity step protocol.
Tc was evaluated by the rotational velocity step test using the OtoaccessTM interface (Interacoustics Nydiag 200, Middlefart, Denmark). Subjects were seated on the rotatory chair wearing videonystagmography goggles with their heads supported and tilted 30° forward, thus bringing the horizontal semicircular canals plane perpendicular to the axis of rotation. Standard videonystagmography techniques were employed to record eye-movements. Subsequent to eye movements' calibration, the chair was accelerated about the yaw axis at 30°/sec2 to a maximal velocity of 90°/sec, followed by rotation at a constant velocity. After 57 seconds of constant velocity rotation, the chair was decelerated to zero velocity at 30°/sec2. The described velocity step was conducted both clockwise and counter-clockwise, giving a total run time of 4 minutes.
6 month follow up vestibular time constant measurement.
vestibular time constant in seconds is the measurement of decline in maximal slow phase velocity of eye movement during nystagmus to 37% of initial value produced by abrupt acceleration and declarations in a rotatory chair - step velocity protocol.
Time frame: 6 months
Plan to share: No — The data that supports the findings of this study are available upon request from the corresponding author, Tal D.
No publications or documents are linked to this record.
Ran from Sep 2017 to primary completion in Jan 2020, 28 months.
Of 15 interventional studies with no phase under Motion Sickness, half reached primary completion within 17 months of starting (the median), counting those still running; a quarter within 3 and three quarters within 29. This study's 28 months is above that.
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This study is completed, as verified in Nov 2022. You cannot join it, but the record below documents what was studied.
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Medical Corps, Israel Defense Force