Pain, ProceduralPhase 4NCT05125328
ANI and Remifentanil in Skull Pin Fixation.
A Phase 4 study testing Remifentanil in people with Pain, Procedural, run by Kaohsiung Medical University Chung-Ho Memorial Hospital at 1 site in Taiwan.
Trial summary
Forty patients were enrolled, and all patients used total intravenous anesthesia (remifentanil-propofol based total intravenous analgesia) as anesthesia induction and maintenance. Read more about this study
- Who is it for?
- Ages 20 to 80 years
- Conditions the study is for
- Pain, Procedural
- What is being tested?
- Remifentanil
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 27 participants
- Where
- 1 siteTaiwan
- Study dates
- 19 Apr 2023to 13 Jun 2023
- 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 20 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Must be at least 20 years old and less than 80 years old
- With anesthesia risk grade below grade three (including grade three) (ASA I~III)
- Patients who are expected to undergo intracranial surgery for skull pin fixation
Who cannot join
- Those with anesthesia risk classification ASA class IV or higher
- Those who are allergic to opioid analgesics or propofol drugs
- Emergency patients
Trial locations and contacts
1 site in 1 country.
Taiwan1 site
Kaohsiung Medical University Chung-Ho Memorial Hospital
Kaohsiung City
About this study
Official title: To Explore the Optimal Dose of Remifentanil for Skull Pin Fixation in Intracranial Surgery.
Forty patients were enrolled, and all patients used total intravenous anesthesia (remifentanil-propofol based total intravenous analgesia) as anesthesia induction and maintenance. According to the preliminary data of this department, patients who underwent intracranial surgery for skull pin fixation used remifentanil 5.0-6.0 ng/ml, while the hemodynamics is relatively stable. Therefore, when this plan is implemented, the patient needs to be under the same depth of anesthesia (monitored by electroencephalography, maintaining a value of 40-60), first start with remifentanil 6.0 ng/ml, and use the up and down method as adjust 0.5 ng/ml of concentration of remifentanil each time. An Analgesia Nociception Index(ANI) lower than 30 and hyperdynamics (the increased heart rate(HR) and mean blood pressure(MBP) up 20% of baseline or HR>100bpm and arterial blood pressure(ABP)>180/100mmHg) indicates insufficient analgesia, therefore increase it by 0.5 ng/ml; an ANI higher than 30 and stable hemodynamics (the changes of HR and MBP within 20% of baseline or HR<50bpm and ABP<90/50mmHg) indicates that analgesia is acceptable, and the next patient will decrease it by 0.5 ng/ml during skull pin fixation.
Data collection: Heart Rate, Measure blood pressure, Analgesia Nociception Index, Bispectral index, concentrations of propofol and remifentanil before 2 mins, during, 5, and 15 mins of skull pin fixation were recorded and analyzed.
- Conditions
- Pain, Procedural
- Being tested
- Remifentanil
- Keywords
- remifentanil, pain, analgesia nociception index
- Medical subject headings
- Pain, Procedural, Pain
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
RemifentanilDrug
First start with remifentanil 6.0 ng/ml, and use the up and down method as adjust 0.5 ng/ml of concentration of remifentanil each time. An ANI lower than 30 and hyperdynamics (the increased heart rate and mean blood pressure up 20% of baseline or heart rate>100bpm and arterial blood pressure>180/100mmHg) indicates insufficient analgesia, therefore increase it by 0.5 ng/ml; an ANI higher than 30 and stable hemodynamics (the changes of HR and MBP within 20% of baseline or HR<50bpm and ABP<90/50mmHg) indicates that analgesia is acceptable, and the next patient will decrease it by 0.5 ng/ml during skull pin fixation.
| Study group | Role | What they receive |
|---|---|---|
| neurosurgery with fixation | Experimental | Not described Receives: Drug: Remifentanil |
What is being measured
The primary outcome is the main question the study is designed to answer.
50% effect concentration of remifentanil
50% effect concentration of remifentanil will be recorded at 2 mins before fixation, during fixation, 5mins after fixation, and 15 mins after fixation.
Measured: peri-fixation period
90% effect concentration of remifentanil
90% effect concentration of remifentanil will be recorded at 2 mins before fixation, during fixation, 5mins after fixation, and 15 mins after fixation.
Measured: peri-fixation period
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Nov 2021
- Study start19 Apr 2023
- Primary completion13 Jun 2023
- Study completion13 Jun 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Pain, ProceduralStudies of the same condition, open and under way.
- More trials run by Kaohsiung Medical University Chung-Ho Memorial HospitalThe sponsor's other registered studies.
- 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
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 27 participants (actual)
Sponsor and investigators
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05125328
- Sponsor's protocol ID
- KMUHIRB-F(I)-20210156
- Status last verified
- Mar 2024
- First submitted
- 11 Oct 2021
- Last updated
- 21 Mar 2024
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 21 Mar 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- To Explore the Optimal Dose of Remifentanil for Skull Pin Fixation in Intracranial Surgery.
- ClinicalTrials.gov ID
- NCT05125328
- Acronym / sponsor ID
- KMUHIRB-F(I)-20210156
- Conditions
- Pain, Procedural
- Keywords
- remifentanil, pain, analgesia nociception index
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 27 participants (actual)
- Lead sponsor
- Kaohsiung Medical University Chung-Ho Memorial HospitalUniversity, hospital or other
- Study start
- 19 Apr 2023 (actual)
- Primary completion
- 13 Jun 2023 (actual)
- Study completion
- 13 Jun 2023 (actual)
- First posted
- 18 Nov 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.
Forty patients were enrolled, and all patients used total intravenous anesthesia (remifentanil-propofol based total intravenous analgesia) as anesthesia induction and maintenance. According to the preliminary data of this department, patients who underwent intracranial surgery for skull pin fixation used remifentanil 5.0-6.0 ng/ml, while the hemodynamics is relatively stable. Therefore, when this plan is implemented, the patient needs to be under the same depth of anesthesia (monitored by electroencephalography, maintaining a value of 40-60), first start with remifentanil 6.0 ng/ml, and use the up and down method as adjust 0.5 ng/ml of concentration of remifentanil each time. An Analgesia Nociception Index(ANI) lower than 30 and hyperdynamics (the increased heart rate(HR) and mean blood pressure(MBP) up 20% of baseline or HR>100bpm and arterial blood pressure(ABP)>180/100mmHg) indicates insufficient analgesia, therefore increase it by 0.5 ng/ml; an ANI higher than 30 and stable hemodynamics (the changes of HR and MBP within 20% of baseline or HR<50bpm and ABP<90/50mmHg) indicates that analgesia is acceptable, and the next patient will decrease it by 0.5 ng/ml during skull pin fixation.
Data collection: Heart Rate, Measure blood pressure, Analgesia Nociception Index, Bispectral index, concentrations of propofol and remifentanil before 2 mins, during, 5, and 15 mins of skull pin fixation were recorded and analyzed.
Study design
- Primary purpose
- Prevention
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| neurosurgery with fixation | Experimental | Drug: Remifentanil |
Who may qualify
- Ages
- 20 to 80 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (3 listed)
- Must be at least 20 years old and less than 80 years old
- With anesthesia risk grade below grade three (including grade three) (ASA I~III)
- Patients who are expected to undergo intracranial surgery for skull pin fixation
Key exclusion criteria (3 listed)
- Those with anesthesia risk classification ASA class IV or higher
- Those who are allergic to opioid analgesics or propofol drugs
- Emergency patients
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 |
|---|---|---|
| RemifentanilFirst start with remifentanil 6.0 ng/ml, and use the up and down method as adjust 0.5 ng/ml of concentration of remifentanil each time. An ANI lower than 30 and hyperdynamics (the increased heart rate and mean blood pressure up 20% of baseline or heart rate>100bpm and arterial blood pressure>180/100mmHg) indicates insufficient analgesia, therefore increase it by 0.5 ng/ml; an ANI higher than 30 and stable hemodynamics (the changes of HR and MBP within 20% of baseline or HR<50bpm and ABP<90/50mmHg) indicates that analgesia is acceptable, and the next patient will decrease it by 0.5 ng/ml during skull pin fixation. | Drug | neurosurgery with fixation |
Primary outcome
50% effect concentration of remifentanil
Time frame: peri-fixation period
50% effect concentration of remifentanil will be recorded at 2 mins before fixation, during fixation, 5mins after fixation, and 15 mins after fixation.
90% effect concentration of remifentanil
Time frame: peri-fixation period
90% effect concentration of remifentanil will be recorded at 2 mins before fixation, during fixation, 5mins after fixation, and 15 mins after fixation.
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 21 Mar 2024.
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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 Remifentanil in people with Pain, Procedural, run by Kaohsiung Medical University Chung-Ho Memorial Hospital at 1 site in Taiwan.
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 3 inclusion and 3 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 21 Mar 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 Taiwan. 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?
50% effect concentration of remifentanil (time frame: peri-fixation period). 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?
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 21 Mar 2024; AzTrials last refreshed its copy on 7 Nov 2026.