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Can air filters stop surgical infections? huge trial aims to find out

NCT ID NCT04610294

Prevention Sponsor: The Cleveland Clinic Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether special air purifiers in operating rooms can reduce serious infections after surgery. Over 66,000 patients having surgery lasting at least one hour are included. The air purifiers are either active or deactivated, and researchers track infections and complications within 30 days.

What this could mean

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

Active substance
Aerus air sterilization system (device)
What this could lead to
If it works, this could lead to a simple way to prevent surgical infections by cleaning the air in operating rooms.
What could go wrong
This is a large trial, but the device may not make a difference. The results depend on many factors, and the study is not yet complete.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 66,273 people

The number the study aims to enrol. It can still change while the study runs.

Started

May 2021

Expected to finish

Dec 2026

An estimate. End dates often move.

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.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * All patients in designated adult operating rooms * American Society of Anesthesiologists physical status 1-4. * Surgery lasting at least 1 hour.

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As listed by the trial registrant

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

Surgery

Contacts and locations

Locations

  • Cleveland Clinic

    Cleveland, Ohio, 44195, United States

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