Clinical Trial: Efficacy of Premixed Nitrous Oxide and Oxygen in Patient With Out-of-hospital Moderate Acute Pain

Study Status: Completed
Recruit Status: Completed
Study Type: Interventional

Official Title: Efficacy of Premixed Nitrous Oxide and Oxygen in Patient With Out-of-hospital Moderate Acute Pain: a Randomized Double-blind Study

Brief 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. 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 Summary:

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.


Sponsor: University Hospital, Toulouse

Current 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


Original Primary Outcome: Same as current

Current Secondary Outcome:

  • Delay of analgesia (e.g. delay required to obtain analgesia) [ Time Frame: Every 5 minutes from randomization for a one hour period ]
    Analgesia is obtained when the numerical rating scale score is or less than 3/10
  • Adverse events [ Time Frame: Every 5 minutes from randomization for a one hour period ]
    Occurrence of any adverse event from a predefined list. Nausea, Emesis, Dizziness, Drowsiness, Dysphoria, Anxiety, Ear pain


Original Secondary Outcome: Same as current

Information By: University Hospital, Toulouse

Dates:
Date Received: June 22, 2010
Date Started: February 2010
Date Completion:
Last Updated: May 10, 2017
Last Verified: May 2017