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Laughing gas eases abortion pain in new study

NCT ID NCT00769912

Symptom relief Sponsor: Assistance Publique Hopitaux De Marseille Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether a 50% nitrous oxide (laughing gas) and oxygen mixture can reduce pain during a legal abortion done with local anesthesia. 71 adults took part. The main goal was to measure pain during the procedure, with follow-up pain checks and side effects recorded. The approach aims to make the experience more comfortable.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 3

Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.

Participants

71 people

The number who actually took part.

Start date

Oct 2008

Finished

Jun 2009

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Female participants only

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Major patient having signed an assent waits having chosen to make the intervention under local anesthetic Exclusion Criteria: * Minor * contraindication in the use of the paracetamol, the lidocaine * Porphyries

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Conditions

The condition(s) this trial relates to.

pregnancy loss, recurrent, susceptibility to, 1

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Abortion

Contacts and locations

Locations

  • Service de Gynécologie Obstétrique, Hôpital La Conception

    Marseille, 13005, France

More trials for these conditions

Other studies related to the condition(s) this trial covers.