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Showing 1–10 of 10 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Q Collar Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Concussion Prevention in Female Soccer Athletes

NCT03014492
View directory record Official record
Conditions
Concussion, Mild, Concussion, Brain
Interventions
Q Collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
14 Years to 19 Years · Female only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Protection Against Potential Brain Injury During Competitive Football

NCT02696200
View directory record Official record
Conditions
Concussion
Interventions
Q Collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
14 Years to 19 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 8, 2020 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Q-collar and Brain Injury Biomarkers

NCT02271451
View directory record Official record
Conditions
Concussion
Interventions
Q collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
14 Years to 19 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 3, 2020 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Internal Jugular Vein Compression Collar for Novel Symptomatic Treatment of Venous Pulsatile Tinnitus

NCT05441540
View directory record Official record
Conditions
Pulsatile Tinnitus
Interventions
Internal Jugular Vein Compression Collar
Device
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 15, 2024 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Sex and Age Ultrasound Response to Differential Jugular Vein Pressure

NCT03017937
View directory record Official record
Conditions
Concussion, Mild
Interventions
Q-collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
7 Years to 60 Years
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 16, 2020 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Controlled DTI Evaluations in High School Football and Female Soccer to Evaluate Efficacy of Jugular Compression Collar

NCT04068883
View directory record Official record
Conditions
MTBI - Mild Traumatic Brain Injury, Concussion, Mild
Interventions
Q collar
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
13 Years to 19 Years
Enrollment
488 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
2
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 23, 2020 · Synced Sep 2, 2026, 11:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Usability and Tolerability of Novel Protection Device Against Potential Brain Injury During Competitive Sport

NCT03318822
View directory record Official record
Conditions
Brain Injuries, Traumatic, Brain Injury Traumatic Mild
Interventions
Q-Collar
Device
Lead sponsor
Emory University
Other
Eligibility
14 Years to 49 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 5, 2021 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Brain Dynamics in Response to Jugular Vein Compression

NCT03236389
View directory record Official record
Conditions
Concussion, Mild
Interventions
Q Collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
7 Years to 40 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 25, 2023 · Synced Sep 2, 2026, 11:50 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating Q-Collar Effects on Brain Blood Flow Control During Exercise

NCT06826781
View directory record Official record
Conditions
Healthy
Interventions
Q30 Q-Collar, Not wearing Q-Collar
Device · Other
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 30 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 26, 2025 · Synced Sep 2, 2026, 11:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Novel Protection Against Potential Brain, Hearing and Vision Injury During Blast Wave Exposure

NCT03017924
View directory record Official record
Conditions
Concussion, Mild
Interventions
Q collar
Device
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 15, 2021 · Synced Sep 2, 2026, 11:50 AM EDT