Minimally Conscious StateNCT03732092
The Effects of Olfactory Stimulation on Diagnosis and Prognosis of DOC Patients
An observational study of Minimally Conscious State and Vegetative State, run by Jing Wang at 1 site in China.
Trial summary
Analyze the behavioral response of patients with disorders of consciousness through olfactory stimulation, compare the response of olfactory stimulation in patients with different consciousness, and analyze the impact of olfactory stimulation on diagnosis; After the first, third, and sixth months of initial… Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Minimally Conscious State, Vegetative State
- What is being tested?
- Coma Recovery Scale-Revised
- How many people
- 20 participants
- Where
- 1 siteChina
- Study dates
- 15 Mar 2018to 15 Dec 2019
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: patients with disorders of consciousness
Who may be able to join
- 18-65 years old;
- non-acute phase;
- after coma;
- no nerve stimulation drugs within 48 hours before the implementation of the study;
- no neuromuscular blockers within 24 hours before implementation
Who cannot join
- history of forehead injury;
- nasal fractures;
- tracheotomy;
- developmental mental or neurological diseases leading to recorded dysfunction;
- severe fractures of the extremities.
Trial locations and contacts
1 site in 1 country.
China1 site
International Vegetative State and Consciousness Science Institute, Hangzhou Normal University
Hangzhou, Zhejiang, 3100036
About this study
Official title: The Effects of Olfactory Stimulation on Diagnosis and Prognosis of Patients With Disorders of Consciousness
Analyze the behavioral response of patients with disorders of consciousness through olfactory stimulation, compare the response of olfactory stimulation in patients with different consciousness, and analyze the impact of olfactory stimulation on diagnosis; After the first, third, and sixth months of initial enrollment, the recovery of prognosis was tracked by the Coma Recovery Scale-Revision (CRS-R).
Read the detailed description
Previous studies suggested that olfactory stimulus have some effect on some patients with disorders of consciousness. Then, the aim of the present study is to know the prognostic value of olfactory stimulation and the diagnosis for DOC patients. DOC patients were recruited (standard diagnosis procedure is 5 times CRS-R testing within 10 days). The different stimuli were as follows: 1) 1-octene-3-ol, odor. 2) pyridine, odor. 3) water. We presented these stimuli randomly, and we recorded the patient's CRS-R scale behavioral response and response to olfactory stimulation. Analyze the behavioral response of patients with disorders of consciousness through olfactory stimulation, compare the response of olfactory stimulation in patients with different consciousness, and analyze the impact of olfactory stimulation on diagnosis; After the first, third, and sixth months of initial enrollment, the recovery of prognosis was tracked by the Coma Recovery Scale-Revision (CRS-R).
- Conditions
- Minimally Conscious State, Vegetative State
- Being tested
- Coma Recovery Scale-Revised
- Keywords
- disorders of consciousness, prognosis prediction, minimally conscious state, vegetative state, olfactory stimulation
- Medical subject headings
- Persistent Vegetative State, Consciousness Disorders
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Coma Recovery Scale-RevisedDiagnostic test
Patients with disorders of consciousness were assessed by Coma Recovery Scale-Revised (CRS-R). In addition, we selected three stimuli: 1) 1-octene-3-ol, 2) pyridine, 3) water. We presented these three stimuli in front of the patients nose for 3 seconds.
| Study group | Role | What they receive |
|---|---|---|
| patients with disorders of consciousness | Patients with disorders of consciousness from several brain injury, assessed by Coma Recovery Scale-Revised (CRS-R), have been clinically classified into coma, unresponsive wakefulness syndrome and minimally conscious state. Receives: Diagnostic Test: Coma Recovery Scale-Revised |
What is being measured
The primary outcome is the main question the study is designed to answer.
Coma Recovery Scale-Revised （CRS-R）
The CRS-R consists of 23 items grouped in six subscales addressing auditory, visual, motor, oromotor, communication and arousal functions. The higher items represent conscious related behaviour while the lower items for each sub-scale represent reflexive activity. Basis for scoring was the presence or absence of the specific behaviour in response to standard stimuli. Patients were followed up for 1, 3, and 6 months to track the prognosis of patients by CRS-R.
Measured: six months later
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Nov 2018
- Study start15 Mar 2018
- Primary completion15 Nov 2018
- Study completion15 Dec 2019
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Minimally Conscious StateStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 20 participants (actual)
Sponsor and investigators
- Lead sponsor
- Jing Wang
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor-investigator, Jing Wang, Hangzhou Normal University
- Investigators
- Patients with disorders of consciousness were assessed by Coma Di, Pro, Study chair, International Vegetative State and Consciousness Science Institute, Hangzhou Normal University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03732092
- Sponsor's protocol ID
- 2018A04355
- Status last verified
- Dec 2020
- First submitted
- 4 Nov 2018
- Last updated
- 29 Dec 2020
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes
Publications
Chiaravalloti A, Pagani M, Micarelli A, Di Pietro B, Genovesi G, Alessandrini M, Schillaci O. Cortical activity during olfactory stimulation in multiple chemical sensitivity: a (18)F-FDG PET/CT study. Eur J Nucl Med Mol Imaging. 2015 Apr;42(5):733-40. doi: 10.1007/s00259-014-2969-2. Epub 2015 Feb 18.
PubMed 25690545Wang J, Zhang S, Liu W, Zhang Y, Hu Z, Sun Z, Di H. Olfactory Stimulation and the Diagnosis of Patients With Disorders of Consciousness: A Double-Blind, Randomized Clinical Trial. Front Neurosci. 2022 Feb 17;16:712891. doi: 10.3389/fnins.2022.712891. eCollection 2022.
PubMed 35250440
Study at a glance
From the registry record, last updated by the sponsor on 29 Dec 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of Olfactory Stimulation on Diagnosis and Prognosis of Patients With Disorders of Consciousness
- ClinicalTrials.gov ID
- NCT03732092
- Acronym / sponsor ID
- 2018A04355
- Conditions
- Minimally Conscious State, Vegetative State
- Keywords
- disorders of consciousness, prognosis prediction, minimally conscious state, vegetative state, olfactory stimulation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 20 participants (actual)
- Lead sponsor
- Jing WangUniversity, hospital or other
- Study start
- 15 Mar 2018 (actual)
- Primary completion
- 15 Nov 2018 (actual)
- Study completion
- 15 Dec 2019 (actual)
- First posted
- 6 Nov 2018 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Analyze the behavioral response of patients with disorders of consciousness through olfactory stimulation, compare the response of olfactory stimulation in patients with different consciousness, and analyze the impact of olfactory stimulation on diagnosis; After the first, third, and sixth months of initial enrollment, the recovery of prognosis was tracked by the Coma Recovery Scale-Revision (CRS-R).
Detailed description
Previous studies suggested that olfactory stimulus have some effect on some patients with disorders of consciousness. Then, the aim of the present study is to know the prognostic value of olfactory stimulation and the diagnosis for DOC patients. DOC patients were recruited (standard diagnosis procedure is 5 times CRS-R testing within 10 days). The different stimuli were as follows: 1) 1-octene-3-ol, odor. 2) pyridine, odor. 3) water. We presented these stimuli randomly, and we recorded the patient's CRS-R scale behavioral response and response to olfactory stimulation. Analyze the behavioral response of patients with disorders of consciousness through olfactory stimulation, compare the response of olfactory stimulation in patients with different consciousness, and analyze the impact of olfactory stimulation on diagnosis; After the first, third, and sixth months of initial enrollment, the recovery of prognosis was tracked by the Coma Recovery Scale-Revision (CRS-R).
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| patients with disorders of consciousness | – | Diagnostic Test: Coma Recovery Scale-RevisedPatients with disorders of consciousness from several brain injury, assessed by Coma Recovery Scale-Revised (CRS-R), have been clinically classified into coma, unresponsive wakefulness syndrome and minimally conscious state. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- patients with disorders of consciousness
Key inclusion criteria (5 listed)
- 18-65 years old;
- non-acute phase;
- after coma;
- no nerve stimulation drugs within 48 hours before the implementation of the study;
- no neuromuscular blockers within 24 hours before implementation
Key exclusion criteria (5 listed)
- history of forehead injury;
- nasal fractures;
- tracheotomy;
- developmental mental or neurological diseases leading to recorded dysfunction;
- severe fractures of the extremities.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Coma Recovery Scale-RevisedPatients with disorders of consciousness were assessed by Coma Recovery Scale-Revised (CRS-R). In addition, we selected three stimuli: 1) 1-octene-3-ol, 2) pyridine, 3) water. We presented these three stimuli in front of the patients nose for 3 seconds. | Diagnostic test | patients with disorders of consciousness |
Primary outcome
Coma Recovery Scale-Revised （CRS-R）
Time frame: six months later
The CRS-R consists of 23 items grouped in six subscales addressing auditory, visual, motor, oromotor, communication and arousal functions. The higher items represent conscious related behaviour while the lower items for each sub-scale represent reflexive activity. Basis for scoring was the presence or absence of the specific behaviour in response to standard stimuli. Patients were followed up for 1, 3, and 6 months to track the prognosis of patients by CRS-R.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Dec 2020.
- Results publication: PubMed 25690545Chiaravalloti A, Pagani M, Micarelli A, Di Pietro B, Genovesi G, Alessandrini M, Schillaci O. Cortical activity during olfactory stimulation in multiple chemical sensitivity: a (18)F-FDG PET/CT study. Eur J Nucl Med Mol Imaging. 2015 Apr;42(5):733-40. doi: 10.1007/s00259-014-2969-2. Epub 2015 Feb 18.
- Derived from this study: PubMed 35250440Wang J, Zhang S, Liu W, Zhang Y, Hu Z, Sun Z, Di H. Olfactory Stimulation and the Diagnosis of Patients With Disorders of Consciousness: A Double-Blind, Randomized Clinical Trial. Front Neurosci. 2022 Feb 17;16:712891. doi: 10.3389/fnins.2022.712891. eCollection 2022.
- Individual participant dataSharing planned: Yes
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Patients with disorders of consciousness were assessed by Coma Di, Pro study chair
International Vegetative State and Consciousness Science Institute, Hangzhou Normal University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Minimally Conscious State and Vegetative State, run by Jing Wang at 1 site in China.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 Dec 2020. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Coma Recovery Scale-Revised （CRS-R） (time frame: six months later). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT03732092, which also lists 2 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Dec 2020; AzTrials last refreshed its copy on 8 Nov 2026.