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Seasickness Susceptability and Vestibular Time Constant

NCT05640258 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 67

Last updated 2022-12-14

No results posted yet for this study

Summary

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.

Conditions

  • Seasickness

Interventions

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.

Sponsors & Collaborators

  • Medical Corps, Israel Defense Force

    lead OTHER

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
20 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2017-09-18
Primary Completion
2020-01-26
Completion
2020-07-26

Countries

  • Israel

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 NCT05640258 on ClinicalTrials.gov