EECPhase 4NCT04760028
Study on the Influencing Factors of Electroencephalogram Parameters Under Anesthesia
A Phase 4 study testing Adjusting the depth of anesthesia in people with EEC, run by Tianjin Medical University Second Hospital at 1 site in China.
Trial summary
The depth of anaesthesia is affected by the age factor in the interpretation of EEG information. Only by fully considering the influence of the age factor can we accurately grasp the depth of anaesthesia. Read more about this study
- Who is it for?
- Ages 18 to 100 years
- Conditions the study is for
- EEC
- What is being tested?
- Adjusting the depth of anesthesia
- Type of treatment
- Surgery or procedure
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 80 participants
- Where
- 1 siteChina
- Study dates
- 1 Mar 2023to 30 Mar 2024
- Phase
- Phase 4
- 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 100 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- ASA Ⅰ ~ Ⅲ level
- 18 to 100 years
- BMI 19 ~ 30 kg/m squared
- Patients without intracranial surgery
Who cannot join
- nervous system diseases, abnormal EEG, old cerebral infarction, the use of drugs affecting the nervous system;
- coronary heart disease, hypertension without regular treatment or poor control;
- The oxygen partial pressure and calcium ion levels were abnormal before anesthesia induction;
- History of alcohol abuse.
Trial locations and contacts
1 site in 1 country.
About this study
The depth of anaesthesia is affected by the age factor in the interpretation of EEG information. Only by fully considering the influence of the age factor can we accurately grasp the depth of anaesthesia.
Read the detailed description
In the process of general anesthesia, the reliable judgment of the depth of anesthesia has always been the focus of anesthesiologists.In recent decades, researchers have discovered that it is possible to monitor the effects of anesthesia using electroencephalography (EEG), so the information has come to be used to guide anesthesia management.The indicators derived from electroencephalogram (EEG) that can be used to judge the depth of anesthesia during general anesthesia, such as spectral edge frequency, burst inhibition rate, median power frequency, etc., were successively born. Thereafter, commercial instruments for monitoring the depth of anesthesia, such as EEG dual-frequency index, entropy module, Narcotrend index, etc., were also widely used in clinical practice.Although the anesthesia measurements or instrument has many advantages, but the use of these indicators are not considering the factors of age, and have been well documented for general anesthesia electroencephalography (eeg) of different ages is different, this means that in different age groups using the same monitoring indicators will lead to the judgment of anesthesia depth is larger error.Therefore, age should be considered in the process of monitoring the depth of clinical anesthesia, and appropriate indexes should be selected according to different ages to monitor the depth of anesthesia.However, it has not been thoroughly studied which indexes can be used to monitor the depth of anesthesia in each age group and how to conduct reasonable monitoring.Therefore, it is necessary to explore the monitoring indexes of depth of anesthesia in different age groups and the most appropriate monitoring program.
The purpose of this study was to validate EEG indicators that can monitor the depth of anesthesia at different ages, including basic EEG power spectrum parameters and processed parameters, and to explore whether there is an optimal protocol for monitoring the depth of anesthesia at different ages.In order to facilitate the clinical selection of patients of different age groups to monitor the depth of anesthesia, the factor of age is considered so as to take individual monitoring.Finally, it can accurately judge the depth of anesthesia and accurately use the anesthetic drugs.
- Conditions
- EEC
- Being tested
- Adjusting the depth of anesthesia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Adjusting the depth of anesthesiaProcedure or surgery
After the main procedure, the depth of anesthesia can be adjusted as needed
| Study group | Role | What they receive |
|---|---|---|
| sevoflurane | Other | Adjust sevoflurane concentration as required Receives: Procedure: Adjusting the depth of anesthesia |
What is being measured
The primary outcome is the main question the study is designed to answer.
Indicators for monitoring the depth of anesthesia in different age groups
The absolute power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in dB, the relative power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in %, the approximate entropy, sequence entropy and sample entropy without unit, and the double coherence without unit in monitoring the depth of anesthesia in different ages
Measured: three months
Relationship between EEG information index and age
The absolute power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in dB, the relative power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in %, there is no unit of approximate entropy, sequence entropy, sample entropy, double coherence and the relationship between age and depth of anesthesia
Measured: three months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Feb 2021
- Study start1 Mar 2023
- Primary completion10 Jan 2024
- Study completion30 Mar 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (12)Papers the sponsor has linked to this study.
- Other trials for EECStudies 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
- Interventional
- Phase
- Phase 4
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 80 participants (actual)
Sponsor and investigators
- Lead sponsor
- Tianjin Medical University Second Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04760028
- Sponsor's protocol ID
- EEG
- Status last verified
- Jun 2024
- First submitted
- 5 Feb 2021
- Last updated
- 25 Jun 2024
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Monk TG, Saini V, Weldon BC, Sigl JC. Anesthetic management and one-year mortality after noncardiac surgery. Anesth Analg. 2005 Jan;100(1):4-10. doi: 10.1213/01.ANE.0000147519.82841.5E.
PubMed 15616043Brown EN, Purdon PL. The aging brain and anesthesia. Curr Opin Anaesthesiol. 2013 Aug;26(4):414-9. doi: 10.1097/ACO.0b013e328362d183.
PubMed 23820102Bennett C, Voss LJ, Barnard JP, Sleigh JW. Practical use of the raw electroencephalogram waveform during general anesthesia: the art and science. Anesth Analg. 2009 Aug;109(2):539-50. doi: 10.1213/ane.0b013e3181a9fc38.
PubMed 19608830Otto KA, Cebotari S, Hoffler HK, Tudorache I. Electroencephalographic Narcotrend index, spectral edge frequency and median power frequency as guide to anaesthetic depth for cardiac surgery in laboratory sheep. Vet J. 2012 Mar;191(3):354-9. doi: 10.1016/j.tvjl.2011.02.023. Epub 2011 Mar 30.
PubMed 21454112Schultz A, Siedenberg M, Grouven U, Kneif T, Schultz B. Comparison of Narcotrend Index, Bispectral Index, spectral and entropy parameters during induction of propofol-remifentanil anaesthesia. J Clin Monit Comput. 2008 Apr;22(2):103-11. doi: 10.1007/s10877-008-9111-6. Epub 2008 Feb 21.
PubMed 18288579Avidan MS, Zhang L, Burnside BA, Finkel KJ, Searleman AC, Selvidge JA, Saager L, Turner MS, Rao S, Bottros M, Hantler C, Jacobsohn E, Evers AS. Anesthesia awareness and the bispectral index. N Engl J Med. 2008 Mar 13;358(11):1097-108. doi: 10.1056/NEJMoa0707361.
PubMed 18337600Hayashi K, Indo K, Sawa T. Anaesthesia-dependent oscillatory EEG features in the super-elderly. Clin Neurophysiol. 2020 Sep;131(9):2150-2157. doi: 10.1016/j.clinph.2020.05.027. Epub 2020 Jun 23.
PubMed 32682243Kreuzer M, Stern MA, Hight D, Berger S, Schneider G, Sleigh JW, Garcia PS. Spectral and Entropic Features Are Altered by Age in the Electroencephalogram in Patients under Sevoflurane Anesthesia. Anesthesiology. 2020 May;132(5):1003-1016. doi: 10.1097/ALN.0000000000003182.
PubMed 32108685Aranake A, Mashour GA, Avidan MS. Minimum alveolar concentration: ongoing relevance and clinical utility. Anaesthesia. 2013 May;68(5):512-22. doi: 10.1111/anae.12168. Epub 2013 Feb 16.
PubMed 23414556Blain-Moraes S, Tarnal V, Vanini G, Alexander A, Rosen D, Shortal B, Janke E, Mashour GA. Neurophysiological correlates of sevoflurane-induced unconsciousness. Anesthesiology. 2015 Feb;122(2):307-16. doi: 10.1097/ALN.0000000000000482.
PubMed 25296108Smith WD, Dutton RC, Smith NT. Measuring the performance of anesthetic depth indicators. Anesthesiology. 1996 Jan;84(1):38-51. doi: 10.1097/00000542-199601000-00005.
PubMed 8572353Li X, Li D, Liang Z, Voss LJ, Sleigh JW. Analysis of depth of anesthesia with Hilbert-Huang spectral entropy. Clin Neurophysiol. 2008 Nov;119(11):2465-75. doi: 10.1016/j.clinph.2008.08.006. Epub 2008 Sep 21.
PubMed 18812265
Study at a glance
From the registry record, last updated by the sponsor on 25 Jun 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Study on the Influencing Factors of Electroencephalogram Parameters Under Anesthesia
- ClinicalTrials.gov ID
- NCT04760028
- Acronym / sponsor ID
- EEG
- Conditions
- EEC
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 80 participants (actual)
- Lead sponsor
- Tianjin Medical University Second HospitalUniversity, hospital or other
- Study start
- 1 Mar 2023 (actual)
- Primary completion
- 10 Jan 2024 (actual)
- Study completion
- 30 Mar 2024 (actual)
- First posted
- 18 Feb 2021 (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.
The depth of anaesthesia is affected by the age factor in the interpretation of EEG information. Only by fully considering the influence of the age factor can we accurately grasp the depth of anaesthesia.
Detailed description
In the process of general anesthesia, the reliable judgment of the depth of anesthesia has always been the focus of anesthesiologists.In recent decades, researchers have discovered that it is possible to monitor the effects of anesthesia using electroencephalography (EEG), so the information has come to be used to guide anesthesia management.The indicators derived from electroencephalogram (EEG) that can be used to judge the depth of anesthesia during general anesthesia, such as spectral edge frequency, burst inhibition rate, median power frequency, etc., were successively born. Thereafter, commercial instruments for monitoring the depth of anesthesia, such as EEG dual-frequency index, entropy module, Narcotrend index, etc., were also widely used in clinical practice.Although the anesthesia measurements or instrument has many advantages, but the use of these indicators are not considering the factors of age, and have been well documented for general anesthesia electroencephalography (eeg) of different ages is different, this means that in different age groups using the same monitoring indicators will lead to the judgment of anesthesia depth is larger error.Therefore, age should be considered in the process of monitoring the depth of clinical anesthesia, and appropriate indexes should be selected according to different ages to monitor the depth of anesthesia.However, it has not been thoroughly studied which indexes can be used to monitor the depth of anesthesia in each age group and how to conduct reasonable monitoring.Therefore, it is necessary to explore the monitoring indexes of depth of anesthesia in different age groups and the most appropriate monitoring program.
The purpose of this study was to validate EEG indicators that can monitor the depth of anesthesia at different ages, including basic EEG power spectrum parameters and processed parameters, and to explore whether there is an optimal protocol for monitoring the depth of anesthesia at different ages.In order to facilitate the clinical selection of patients of different age groups to monitor the depth of anesthesia, the factor of age is considered so as to take individual monitoring.Finally, it can accurately judge the depth of anesthesia and accurately use the anesthetic drugs.
Study design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| sevoflurane | Other | Procedure: Adjusting the depth of anesthesiaAdjust sevoflurane concentration as required |
Who may qualify
- Ages
- 18 to 100 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- ASA Ⅰ ~ Ⅲ level
- 18 to 100 years
- BMI 19 ~ 30 kg/m squared
- Patients without intracranial surgery
Key exclusion criteria (4 listed)
- nervous system diseases, abnormal EEG, old cerebral infarction, the use of drugs affecting the nervous system;
- coronary heart disease, hypertension without regular treatment or poor control;
- The oxygen partial pressure and calcium ion levels were abnormal before anesthesia induction;
- History of alcohol abuse.
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 |
|---|---|---|
| Adjusting the depth of anesthesiaAfter the main procedure, the depth of anesthesia can be adjusted as needed | Procedure or surgery | sevoflurane |
Primary outcome
Indicators for monitoring the depth of anesthesia in different age groups
Time frame: three months
The absolute power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in dB, the relative power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in %, the approximate entropy, sequence entropy and sample entropy without unit, and the double coherence without unit in monitoring the depth of anesthesia in different ages
Relationship between EEG information index and age
Time frame: three months
The absolute power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in dB, the relative power of slow wave, δ wave, θ wave, α wave, β wave and γ wave in %, there is no unit of approximate entropy, sequence entropy, sample entropy, double coherence and the relationship between age and depth of anesthesia
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 25 Jun 2024.
- Background: PubMed 15616043Monk TG, Saini V, Weldon BC, Sigl JC. Anesthetic management and one-year mortality after noncardiac surgery. Anesth Analg. 2005 Jan;100(1):4-10. doi: 10.1213/01.ANE.0000147519.82841.5E.
- Background: PubMed 23820102Brown EN, Purdon PL. The aging brain and anesthesia. Curr Opin Anaesthesiol. 2013 Aug;26(4):414-9. doi: 10.1097/ACO.0b013e328362d183.
- Background: PubMed 19608830Bennett C, Voss LJ, Barnard JP, Sleigh JW. Practical use of the raw electroencephalogram waveform during general anesthesia: the art and science. Anesth Analg. 2009 Aug;109(2):539-50. doi: 10.1213/ane.0b013e3181a9fc38.
- Background: PubMed 21454112Otto KA, Cebotari S, Hoffler HK, Tudorache I. Electroencephalographic Narcotrend index, spectral edge frequency and median power frequency as guide to anaesthetic depth for cardiac surgery in laboratory sheep. Vet J. 2012 Mar;191(3):354-9. doi: 10.1016/j.tvjl.2011.02.023. Epub 2011 Mar 30.
- Background: PubMed 18288579Schultz A, Siedenberg M, Grouven U, Kneif T, Schultz B. Comparison of Narcotrend Index, Bispectral Index, spectral and entropy parameters during induction of propofol-remifentanil anaesthesia. J Clin Monit Comput. 2008 Apr;22(2):103-11. doi: 10.1007/s10877-008-9111-6. Epub 2008 Feb 21.
- Background: PubMed 18337600Avidan MS, Zhang L, Burnside BA, Finkel KJ, Searleman AC, Selvidge JA, Saager L, Turner MS, Rao S, Bottros M, Hantler C, Jacobsohn E, Evers AS. Anesthesia awareness and the bispectral index. N Engl J Med. 2008 Mar 13;358(11):1097-108. doi: 10.1056/NEJMoa0707361.
- Background: PubMed 32682243Hayashi K, Indo K, Sawa T. Anaesthesia-dependent oscillatory EEG features in the super-elderly. Clin Neurophysiol. 2020 Sep;131(9):2150-2157. doi: 10.1016/j.clinph.2020.05.027. Epub 2020 Jun 23.
- Background: PubMed 32108685Kreuzer M, Stern MA, Hight D, Berger S, Schneider G, Sleigh JW, Garcia PS. Spectral and Entropic Features Are Altered by Age in the Electroencephalogram in Patients under Sevoflurane Anesthesia. Anesthesiology. 2020 May;132(5):1003-1016. doi: 10.1097/ALN.0000000000003182.
- Background: PubMed 23414556Aranake A, Mashour GA, Avidan MS. Minimum alveolar concentration: ongoing relevance and clinical utility. Anaesthesia. 2013 May;68(5):512-22. doi: 10.1111/anae.12168. Epub 2013 Feb 16.
- Background: PubMed 25296108Blain-Moraes S, Tarnal V, Vanini G, Alexander A, Rosen D, Shortal B, Janke E, Mashour GA. Neurophysiological correlates of sevoflurane-induced unconsciousness. Anesthesiology. 2015 Feb;122(2):307-16. doi: 10.1097/ALN.0000000000000482.
- Background: PubMed 8572353Smith WD, Dutton RC, Smith NT. Measuring the performance of anesthetic depth indicators. Anesthesiology. 1996 Jan;84(1):38-51. doi: 10.1097/00000542-199601000-00005.
- Background: PubMed 18812265Li X, Li D, Liang Z, Voss LJ, Sleigh JW. Analysis of depth of anesthesia with Hilbert-Huang spectral entropy. Clin Neurophysiol. 2008 Nov;119(11):2465-75. doi: 10.1016/j.clinph.2008.08.006. Epub 2008 Sep 21.
- Individual participant dataSharing planned: No
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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.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Adjusting the depth of anesthesia in people with EEC, run by Tianjin Medical University Second Hospital 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 4 inclusion and 4 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 25 Jun 2024. 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.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
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?
Indicators for monitoring the depth of anesthesia in different age groups (time frame: three months). The study lists 2 primary outcomes in all. 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 NCT04760028, which also lists 12 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 25 Jun 2024.