Seasickness Susceptability and Vestibular Time Constant

Not Applicable

Completed

• Conditions: Seasickness
• Interventions: Diagnostic Test: rotatory chair testing in a velocity step protocol.

• Registration Number: NCT05640258
• Lead Sponsor: Medical Corps, Israel Defense Force

Brief 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.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-09-18
• Primary Completion: 2020-01-26
• Study Completion: 2020-07-26
• Status Verified: 2022-11
• Study First Submitted: 2022-11-28
• Study First Submitted QC: 2022-11-28
• Study First Posted: 2022-12-07
• Last Update Submitted: 2022-12-12
• Last Update Posted: 2022-12-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 67

Inclusion Criteria

• healthy male Navy sailors in basic training

Exclusion Criteria

• History of hearing loss
• Otoscopic findings of ear pathology
• An implanted electrode
• A finding of vestibulopathy upon otoneurological examination -
• Discontinuation of active sailing for any reason during study follow-up
• Withdrawal of informed consent.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
seasickness susceptibility and vestibular time constant	rotatory chair testing in a velocity step protocol.	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.

Primary Outcome Measures

Name	Time	Method
6 month follow up vestibular time constant measurement.	6 months	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.

Trial Locations

Locations (1)

Israeli Naval Medical Institute; 🇮🇱 Haifa, Israel