Low-Flow anesthesia: safe or germ haven?
NCT ID NCT07092046
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
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140 people
The number who actually took part.
- Started
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Aug 2025
- Finished
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Apr 2026
- Lead sponsor
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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
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18 to 65 years
- Sex
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Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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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Other studies related to the condition(s) this trial covers.
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