- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning NCT07690358
Concentrations of Nitrous Oxide in Blood, Exhaled Air and Urine After Various Types of Exposure.
Undersøgelse af Lattergaskoncentrationer i Blod, udåndingsluft og Urin Ved Forskellige Eksponeringer
The study examines the concentrations of nitrous oxide that are achieved in blood, exhaled air, and urine after three different exposures to nitrous oxide:
inhalation of three or four cartridges of nitrous oxide released in a car cabin in a switched-off car, consumption of 100 g of whipped cream in which nitrous oxide is used as a propellant, and exposure through work as a midwife in a delivery room.
The concentrations in blood and exhaled air are measured for up to 1 hour after exposure, and in urine for up to 2 hours after exposure. The concentrations in blood and urine are measued with gas chromatography and mass spectrometry, while the concentration in exhaled air is measured by a sensor using an NDIR sensor (Olythe, France).
Studieöversikt
Status
Betingelser
Intervention / Behandling
Studietyp
Inskrivning (Beräknad)
Fas
- Inte tillämpbar
Kontakter och platser
Studiekontakt
- Namn: Charlotte U Andersen, Associate Professor
- Telefonnummer: +4560128430
- E-post: cua@biomed.au.dk
Studieorter
-
-
-
Aarhus, Danmark, 8200
- Rekrytering
- Department of Forensic Medicine
-
Kontakt:
- Charlotte U Andersen, Associate Professor
- Telefonnummer: +4560128430
- E-post: cua@biomed.au.dk
-
-
Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
- Äldre vuxen
Tar emot friska volontärer
Beskrivning
For arm 1, 2, and 3:
Inclusion Criteria:
- Age 18-65 years
- Able to understand Danish
- Willing to use effective contraception for 24 hours after the end of exposure (oral contraceptives, contraceptive implant, transdermal patch, vaginal ring, or injectable contraceptives)
- Written informed consent
Exclusion Criteria:
- Current or past abuse of drugs, nitrous oxide (N₂O), or alcohol
- A psychiatric disorder requiring medical treatment, including severe depression
- A diagnosis of epilepsy
- Symptoms of peripheral neuropathy
- Significant cardiac or pulmonary disease
- Previous allergic or adverse reaction to N₂O
- Diving within the past 2 days
- Inability to refrain from diving for 2 days after the study
- Occupational exposure to N₂O
- Use of N₂O within the past 3 months
- Treatment with methotrexate, benzodiazepines, opioids, or other centrally depressant drugs
- Recent intraocular gas injection
- Known impaired liver or kidney function
- Pregnant or breastfeeding women (fertile women, defined as amenorrhea for less than 12 months, must have a negative hCG pregnancy test prior to receiving the study intervention)
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Övrig
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
|
Experimentell: Passive exposure in car, 3 cartridges
A person sits for 15 minutes after releasing 4 x 8.4 g of nitrous oxide into the cabin
|
Passive exposure to Nitrous Oxide
|
|
Experimentell: Passive exposure in car, 4 cartridges
A person sits for 15 minutes after releasing 4 x 8.4 g of nitrous oxide into the cabin
|
Passive exposure to Nitrous Oxide
|
|
Experimentell: Whipped cream, 100 g
A person ingests 100 g of whipped cream with nitrous oxide as propellant
|
Passive exposure to Nitrous Oxide
|
|
Aktiv komparator: Environmental exposure
concentrations of nitrous oxide are measured after exposure through work as a midwife in a delivery room
|
Midwifes are exposed through work in a delivery room
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
|
Detection time of Nitrous Oxide in blood
Tidsram: From end of exposure to 1 hour after end of exposure
|
The time after exposure in which Nitrous Oxide can be detected in blood
|
From end of exposure to 1 hour after end of exposure
|
Samarbetspartners och utredare
Sponsor
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Beräknad)
Avslutad studie (Beräknad)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
- 1-10-72-156-25
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
Läkemedels- och apparatinformation, studiedokument
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