CompletedNot Applicable

Effects on the Olfactory Epithelium and the Olfactory Nerve From Exposure to Diesel Exhaust

Sweden40 participantsStarted 2019-02-01

Plain-language summary

The goal of this study is to study the effect exposure to air pollution and its effect on development of dementia. Does the diesel exhaust change the function of the olfactory system? Have the exposures measurable effects on the sense of smell and cognitive ability? Forty people are exposed to diesel exhaust exhaust and filtered air. The exposures are blinded and in a randomized order. Both groups undergo biopsies of the olfactory epithelium in the nose under local anesthesia after the exposures and after performing cognitive test.

Who can participate

Age range

20 Years – 70 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Healthy * non-smoker Exclusion Criteria: * Allergic rhinitis * Asthma * Diabetes mellitus * Kidney or liver failure * Angina pectoris or previous ventricular arrhythmia * Systolic blood pressure \>190 mmHg or \<100 mmHg * Previous blood disease * Blood donation in the last three months prior to study start * Previous or ongoing tobacco smoking and exposure to air pollution in the workplace * Absence of informed consent

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Diesel exhaust causes cellular dysfunction of the olfactory system

Timeframe: 3 years.

Trial details

NCT IDNCT07237958

SponsorUmeå University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2023-05-12

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