Acute PainPhase 4MEOPANCT01356745
Efficacy of Premixed Nitrous Oxide and Oxygen in Patient With Out-of-hospital Moderate Acute Pain
A Phase 4 study testing Premixed 50% nitrous oxide and oxygen (Kalinox) and medical air in people with Acute Pain, run by University Hospital, Toulouse at 1 site in France.
Trial summary
Less than 10% of patients with a traumatic pain have been managed by a physician before to be admitted in an emergency service. 50 % of those patients have been carried by paramedics. Premixed nitrous oxide and oxygen is often used by paramedics, but no scientific studies have demonstrated its efficacy. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Acute Pain
- What is being tested?
- Premixed 50% nitrous oxide and oxygen (Kalinox) and medical air
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 60 participants
- Where
- 1 siteFrance
- Study dates
- Feb 2010to May 2011
- 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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients aged 18 years old
- Patients with a moderate acute pain (NRS score between 3 and 6)
Who cannot join
- Contraindication of premixed 50% nitrous oxide and oxygen
- Recent treatment of analgesic (less than 6 hours)
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Efficacy of Premixed Nitrous Oxide and Oxygen in Patient With Out-of-hospital Moderate Acute Pain: a Randomized Double-blind Study
Less than 10% of patients with a traumatic pain have been managed by a physician before to be admitted in an emergency service. 50 % of those patients have been carried by paramedics. Premixed nitrous oxide and oxygen is often used by paramedics, but no scientific studies have demonstrated its efficacy. The aim of the study is to demonstrate the efficacy of premixed nitrous oxide and oxygen in patients with out-of-hospital moderate acute pain.
Read the detailed description
The study will evaluate the efficacy of premixed nitrous oxide and oxygen (MEOPA) in patients with out-of-hospital moderate acute pain.
The primary endpoint is the percentage of patients with pain relief (with a numerical rating scale of 3/10 or lower) 15 minutes after randomisation. Secondary endpoints are treatment safety and adverse events, time to analgesia and duration of analgesia. This study will expect 60 patients assigned in two parallel groups, defined by a randomization scheme. Group assignments were sealed in opaque envelopes and will be open sequentially by the dispatcher when the paramedic is ready to include the patient. The letter contained in the envelope corresponds to the cylinder to use. Eligible patients with a numeric rating scale (NRS) score between 3 and 6/10 are randomly allocated to receive either MEOPA, or medical air. Fifteen minutes after the randomisation, all patients will receive MEOPA from a distinct cylinder. Pain score will be measured at baseline and every 5 minutes until pain relief will be obtained. The paramedic blinded to the analgesic treatment groups will do all assessments of patients. The safety evaluation will include non invasive monitoring of blood pressure, heart rate, oxygen saturation by pulse oximetry (SpO2) and adverse events collection.
- Conditions
- Acute Pain
- Being tested
- Premixed 50% nitrous oxide and oxygen (Kalinox), medical air
- Keywords
- premixed nitrous oxide and oxygen, acute pain, prehospital setting
- Medical subject headings
- Acute Pain
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Premixed 50% nitrous oxide and oxygen (Kalinox)Drug
15 min inhalation dose (maximum duration of treatment of a subject)
medical airDrug
inhalation gas for inhalation use
| Study group | Role | What they receive |
|---|---|---|
| premixed 50% nitrous oxide and oxygen | Experimental | Not described Receives: Drug: Premixed 50% nitrous oxide and oxygen (Kalinox) |
| medical air | Placebo comparator | Not described Receives: Drug: medical air |
What is being measured
The primary outcome is the main question the study is designed to answer.
Number of patients with pain relief Number of patients with pain relief Number of patients with pain relief
Pain is mesured with a numerical rating scale (NRS)score on 10.Pain relief is defined by a NRS score of 3 or less
Measured: 15 minutes
Secondary outcomes (2)
Delay of analgesia (e.g. delay required to obtain analgesia)
Analgesia is obtained when the numerical rating scale score is or less than 3/10
Measured: Every 5 minutes from randomization for a one hour period
Adverse events
Occurrence of any adverse event from a predefined list. Nausea, Emesis, Dizziness, Drowsiness, Dysphoria, Anxiety, Ear pain
Measured: Every 5 minutes from randomization for a one hour period
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 May 2011 (estimated)
- Study startFeb 2010
- Primary completionMay 2011
- Study completionMay 2011
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Acute PainStudies of the same condition, open and under way.
- More trials run by University Hospital, ToulouseThe 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
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 60 participants (actual)
Sponsor and investigators
- Lead sponsor
- University Hospital, Toulouse
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Jean-Louis DUCASSE, MD, Principal investigator, University Hospital, Toulouse
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01356745
- Sponsor's protocol ID
- 0900603
- Acronym
- MEOPA
- Status last verified
- May 2017
- First submitted
- 22 Jun 2010
- Last updated
- 12 May 2017
- Results posted
- No
- Data monitoring committee
- No
Publications
Ducasse JL, Siksik G, Durand-Bechu M, Couarraze S, Valle B, Lecoules N, Marco P, Lacombe T, Bounes V. Nitrous oxide for early analgesia in the emergency setting: a randomized, double-blind multicenter prehospital trial. Acad Emerg Med. 2013 Feb;20(2):178-84. doi: 10.1111/acem.12072.
PubMed 23406077
Study at a glance
From the registry record, last updated by the sponsor on 12 May 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Efficacy of Premixed Nitrous Oxide and Oxygen in Patient With Out-of-hospital Moderate Acute Pain: a Randomized Double-blind Study
- ClinicalTrials.gov ID
- NCT01356745
- Acronym / sponsor ID
- MEOPA / 0900603
- Conditions
- Acute Pain
- Keywords
- premixed nitrous oxide and oxygen, acute pain, prehospital setting
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 60 participants (actual)
- Lead sponsor
- University Hospital, ToulouseUniversity, hospital or other
- Study start
- Feb 2010
- Primary completion
- May 2011 (actual)
- Study completion
- May 2011 (actual)
- First posted
- 19 May 2011 (estimated)
- 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.
Less than 10% of patients with a traumatic pain have been managed by a physician before to be admitted in an emergency service. 50 % of those patients have been carried by paramedics. Premixed nitrous oxide and oxygen is often used by paramedics, but no scientific studies have demonstrated its efficacy. The aim of the study is to demonstrate the efficacy of premixed nitrous oxide and oxygen in patients with out-of-hospital moderate acute pain.
Detailed description
The study will evaluate the efficacy of premixed nitrous oxide and oxygen (MEOPA) in patients with out-of-hospital moderate acute pain.
The primary endpoint is the percentage of patients with pain relief (with a numerical rating scale of 3/10 or lower) 15 minutes after randomisation. Secondary endpoints are treatment safety and adverse events, time to analgesia and duration of analgesia. This study will expect 60 patients assigned in two parallel groups, defined by a randomization scheme. Group assignments were sealed in opaque envelopes and will be open sequentially by the dispatcher when the paramedic is ready to include the patient. The letter contained in the envelope corresponds to the cylinder to use. Eligible patients with a numeric rating scale (NRS) score between 3 and 6/10 are randomly allocated to receive either MEOPA, or medical air. Fifteen minutes after the randomisation, all patients will receive MEOPA from a distinct cylinder. Pain score will be measured at baseline and every 5 minutes until pain relief will be obtained. The paramedic blinded to the analgesic treatment groups will do all assessments of patients. The safety evaluation will include non invasive monitoring of blood pressure, heart rate, oxygen saturation by pulse oximetry (SpO2) and adverse events collection.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| premixed 50% nitrous oxide and oxygen | Experimental | Drug: Premixed 50% nitrous oxide and oxygen (Kalinox) |
| medical air | Placebo comparator | Drug: medical air |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Patients aged 18 years old
- Patients with a moderate acute pain (NRS score between 3 and 6)
Key exclusion criteria (2 listed)
- Contraindication of premixed 50% nitrous oxide and oxygen
- Recent treatment of analgesic (less than 6 hours)
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 |
|---|---|---|
| Premixed 50% nitrous oxide and oxygen (Kalinox)15 min inhalation dose (maximum duration of treatment of a subject) | Drug | premixed 50% nitrous oxide and oxygen |
| medical airinhalation gas for inhalation use | Drug | medical air |
Primary outcome
Number of patients with pain relief Number of patients with pain relief Number of patients with pain relief
Time frame: 15 minutes
Pain is mesured with a numerical rating scale (NRS)score on 10.Pain relief is defined by a NRS score of 3 or less
2 secondary outcomes
Delay of analgesia (e.g. delay required to obtain analgesia)
Time frame: Every 5 minutes from randomization for a one hour period
Adverse events
Time frame: Every 5 minutes from randomization for a one hour period
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 12 May 2017.
- Results publication: PubMed 23406077Ducasse JL, Siksik G, Durand-Bechu M, Couarraze S, Valle B, Lecoules N, Marco P, Lacombe T, Bounes V. Nitrous oxide for early analgesia in the emergency setting: a randomized, double-blind multicenter prehospital trial. Acad Emerg Med. 2013 Feb;20(2):178-84. doi: 10.1111/acem.12072.
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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.
Jean-Louis DUCASSE, MD principal investigator
University Hospital, Toulouse
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 Premixed 50% nitrous oxide and oxygen (Kalinox) and medical air in people with Acute Pain, run by University Hospital, Toulouse at 1 site in France.
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 2 inclusion and 2 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 12 May 2017. 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 France. 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. Some participants in this study may receive a placebo. 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?
Number of patients with pain relief Number of patients with pain relief Number of patients with pain relief (time frame: 15 minutes). 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 NCT01356745, which also lists 1 linked publication.
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 12 May 2017; AzTrials last refreshed its copy on 7 Nov 2026.