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
University of Aarhus
40 participants
Jun 1, 2026
INTERVENTIONAL
Conditions
Summary
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).
Eligibility
Plain Language Summary
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Interventions
Passive exposure to Nitrous Oxide
Midwifes are exposed through work in a delivery room
Locations(1)
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NCT07690358