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Heart surgery goes green: study tests Low-Flow anesthesia to cut emissions

NCT ID NCT07313969

Knowledge-focused Sponsor: Dr Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital 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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 study looked at whether using a very low flow of the anesthesia gas sevoflurane during heart surgery is safe and reduces environmental impact. 92 adults having planned heart surgery were randomly assigned to receive either ultra-low-flow or normal-flow anesthesia. Researchers measured how much gas was used, the carbon footprint, and whether patients stayed stable during surgery.

What this could mean

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

Active substance
sevoflurane
What this could lead to
If successful, this could show that using less anesthesia gas during heart surgery is safe and helps the environment by cutting waste and emissions.
What could go wrong
This is a small, completed study with 92 patients, so results may not apply to all heart surgeries. The main focus is on cost and emissions, not patient health outcomes.

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

92 people

The number who actually took part.

Started

Dec 2025

Finished

May 2026

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 to 80 years

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: * Adult patients aged 18-80 years * Scheduled for elective on-pump CABG or valve surgery * ASA physical status II-III * Written informed consent obtained Exclusion Criteria: * Emergency surgery * Severe hepatic or renal dysfunction * Known allergy to volatile anesthetics * Significant pulmonary disease (e.g., COPD with GOLD III-IV)

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Conditions

The condition(s) this trial relates to.

coronary artery disorder heart valve disorder

As listed by the trial registrant

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

Cardiac surgery Low flow anesthesia Sevoflurane anesthesia

Contacts and locations

Locations

  • Etlik City Hospital

    Ankara, Ankara, 06810, Turkey (Türkiye)

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