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New lung scan reveals hidden breathing issues in long COVID sufferers

NCT ID NCT05441657

Knowledge-focused Sponsor: Jan-Christoph Lewejohann Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This completed study used a special imaging method called electrical impedance tomography (EIT) to look at lung function in 100 people with long COVID who have trouble breathing, compared to 50 healthy volunteers. The goal was to see if EIT can detect changes in how air moves through the lungs. This is an observational study, not a treatment, so it aims to improve understanding rather than test a new therapy.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could help doctors better understand and detect breathing problems in people with long COVID.
What could go wrong
This is an observational study, not a treatment trial. It may not lead to any direct medical benefit or change in patient care.

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.

Participants

150 people

The number who actually took part.

Started

Apr 2022

Finished

Aug 2025

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.

Who is studied

100 patients with postacute COVID-19 syndrome who present themselves at the outpatient clinic of the University hospital in Jena (JUH) were examined by EIT. 50 lunghealthy volunteers were examined by EIT at JUH.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * for control group: no current lung diseases, over 18 years old * for patients with postacute COVID-19 syndrome: over 18 years, positive SARS-CoV-2-PCR Exclusion Criteria: * heart pacemaker * epilepsy * BMI over 50

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Conditions

The condition(s) this trial relates to.

COVID-19 long COVID-19 post-COVID-19 disorder

As listed by the trial registrant

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

COVID-19 Electric impedance tomography Post-acute COVID-19 syndrome Post-COVID-19 syndrome Ventilatory defect

Contacts and locations

Locations

  • Jena university hospital

    Jena, Thuringia, 07747, Germany

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