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Low-Flow anesthesia: safe or germ haven?

NCT ID NCT07092046

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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study checked whether using very low gas flow during anesthesia (minimal flow) leads to more germs in the breathing equipment. 140 adults having elective surgery were randomly assigned to minimal or normal flow. Researchers took swabs from the equipment and patients' noses to compare germ levels. The goal was to see if moisture buildup in minimal flow anesthesia increases infection risk.

What this could mean

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

Active substance
Sevoflurane, Propofol, Remifentanil, Rocuronium
What this could lead to
If successful, this could show that minimal flow anesthesia is safe regarding infection risk, supporting its wider use.
What could go wrong
This is a small, completed study focused on equipment contamination, not patient outcomes. Results may not apply to all settings.

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

140 people

The number who actually took part.

Started

Aug 2025

Finished

Apr 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 65 years

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: A total of 140 voluntary patients will be included in the study. Patients will be aged between 18 and 65 years. Both male and female patients will be enrolled. All patients will be classified as c physical status I or II. Patients will undergo elective surgical procedures. The study will be conducted in the operating rooms of Ankara Bilkent City Hospital, affiliated with the Ministry of Health of the Republic of Türkiye. \- Exclusion Criteria: Patients who do not consent to participate Patients outside the age range of 18-65 years Patients classified as ASA (American Society of Anesthesiologists) III, IV, or V Patients scheduled for emergency surgery Patients with uncontrolled hypertension Patients with significant cardiac diseases (e.g., heart failure, coronary artery disease, arrhythmia, valvular heart disease) Patients with significant pulmonary diseases (e.g., Chronic Obstructive Pulmonary Disease, Restrictive Pulmonary Disease, Asthma) Patients with neuromuscular disorders Patients with poorly controlled diabetes mellitus Patients with metabolic disorders Patients with immunodeficiency Patients with significant anemia Patients with bleeding diathesis Patients with liver and/or kidney diseases History of cardiac surgery History of intracranial surgery History of pulmonary surgery History of head and neck surgery Anticipated difficult airway or difficult intubation Patients with alcohol or drug dependence Pregnant or lactating women Known allergy to anesthetic agents Body mass index (BMI) \> 30 kg/m² Presence of sepsis or active infection Baseline body temperature \< 35°C or \> 38°C Patients who have received antibiotics in the past month Patients with malignancies Withdrawal Criteria Patients who develop hemodynamic instability during the intraoperative period Patients requiring interruption of minimal flow anesthesia for more than 5 minutes Patients whose anesthesia circuit becomes disconnected intraoperatively \-

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Conditions

The condition(s) this trial relates to.

As listed by the trial registrant

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

Contacts and locations

Locations

  • Ankara Bilkent City Hospital

    Ankara, Turkey (Türkiye)

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