Risk ReductionNCT04577209
Pediatric Source Control for Hazardous Particulate Exposure in Aerosol Generating Procedures
A study testing Disposable oxygen face tent in people with Risk Reduction, run by Stanford University at 1 site in United States.
Trial summary
There are two purposes of this study. The first purpose is to determine the exposure seen by medical providers (e.g. anesthesiologists, surgeons, and nurses) to infectious and smoke particulates generated during anesthesia-related aerosol generating medical procedures (AGMPs) and pediatric otolaryngologic surgeries… Read more about this study
- Who is it for?
- Ages 2 to 18 years
- Conditions the study is for
- Risk Reduction
- What is being tested?
- Disposable oxygen face tent
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 0 participants
- Where
- 1 siteUnited States
- Study dates
- May 2025to May 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 2 to 18 years
- All sexes
- No healthy volunteers
- Child, Adult
Who may be able to join
- children receiving anesthesia-related aerosol generating medical procedures
Who cannot join
- patients with positive COVID symptoms
- positive preoperative COVID testing
Trial locations and contacts
1 site in 1 country.
United States1 site
Lucile Packard Childrens Hospital
Stanford, California, 94305
About this study
There are two purposes of this study. The first purpose is to determine the exposure seen by medical providers (e.g. anesthesiologists, surgeons, and nurses) to infectious and smoke particulates generated during anesthesia-related aerosol generating medical procedures (AGMPs) and pediatric otolaryngologic surgeries (with and without an intubated airway). The second goal of this study is to apply a local exhaust ventilation system (LEVS) to re-evaluate the exposure seen by the same medical providers during the same AGMPs and surgeries.
Read the detailed description
Prior to the patient entering the OR, particle counters (Digital PM2.5 Air Quality detector, ExGizmo, China) will ensure that the OR air quality has undergone the appropriate airflow exchanges and thus will all read 0.
Measurements will be taken every 30 seconds. A research assistant in the periphery of the OR will observe and record the following events: patient entrance into the OR, initiation of mask induction, intubation, rotation of OR table for surgery, initiation of surgery, completion of surgery, rotation of OR back to anesthesia, extubation, and patient departure from the OR. The particle counters will be positioned accordingly: 1) at the level of the patient's head, 2) at the level of the anesthesiologist/surgeon performing the AGMPs, 3) to the right of the patient, 4) to the left of the patient, 5) at the anesthesia workstation, and 6) at the circulating nurse's computer in the corner of the room. The particle counters will continue with measurements until the patient exits the OR. For patients randomized to the LEVS group, active suction will be provided through the use of a closed biohazardous smoke evacuation system (Neptune 3, Stryker, Michigan, USA) equipped with an internal high efficiency particulate air (HEPA) filter capable of capturing aerosolized particles as small as 0.1 mm with 99.99% efficiency via suction power up to 25 cubic feet per minute air exchange. The active suction will be positioned near the patient's airway without interfering with the AGMP, and across from the location of the anesthesiologist or surgeon performing the AGMP such that no HCW is positioned between the patient's airway and the suction device.
- Conditions
- Risk Reduction
- Being tested
- Disposable oxygen face tent
- Keywords
- aerosol particles, anesthesia
- Medical subject headings
- Risk Reduction Behavior
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Disposable oxygen face tentDevice
Disposable oxygen face tent used to minimize aerosol particles (through suction) during aerosol generating anesthesia procedures.
| Study group | Role | What they receive |
|---|---|---|
| Pediatric Patients | Experimental | Participants undergoing anesthesia-related aerosol generating medical procedures (AGMPs) and pediatric otolaryngologic surgeries will have a local exhaust ventilation system to the exposure seen by the medical providers during the AGMPs and surgeries. Receives: Device: Disposable oxygen face tent |
What is being measured
The primary outcome is the main question the study is designed to answer.
Aerosolized particle concentration in air
To measure the particle concentrations in the air (μg/m^3), particle counters will be located at each of the different healthcare worker positions in the operating room (OR) during an aerosol generating procedure either with a local evacuation system or without one. Measurements will be taken every 30 seconds from prior to the patient entering the OR to patient departure from the OR.
Measured: Up to 60 minutes
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Oct 2020
- Study startMay 2025 (estimated)
- Primary completionMay 2026 (estimated)
- Study completionMay 2026 (estimated)
Why it stopped: No participants were enrolled due to unavailability of research staff.
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Risk ReductionStudies of the same condition, open and under way.
- More trials run by Stanford UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 0 participants (actual)
Sponsor and investigators
- Lead sponsor
- Stanford University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Chi-Ho Ban Tsui, Stanford University
- Investigators
- Ban C Tsui, MD, Study director, Stanford UniversityStephanie Pan, MD, Principal investigator, Stanford University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT04577209
- Sponsor's protocol ID
- 57866
- Status last verified
- Apr 2025
- First submitted
- 28 Sep 2020
- Last updated
- 4 May 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 4 May 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Pediatric Source Control for Hazardous Particulate Exposure in Aerosol Generating Procedures
- ClinicalTrials.gov ID
- NCT04577209
- Acronym / sponsor ID
- 57866
- Conditions
- Risk Reduction
- Keywords
- aerosol particles, anesthesia
- Study type
- Interventional
- Recruitment status
- WithdrawnReason stopped: No participants were enrolled due to unavailability of research staff.
- Enrolment
- 0 participants (actual)
- Lead sponsor
- Stanford UniversityUniversity, hospital or other
- Study start
- May 2025 (estimated)
- Primary completion
- May 2026 (estimated)
- Study completion
- May 2026 (estimated)
- First posted
- 6 Oct 2020 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
There are two purposes of this study. The first purpose is to determine the exposure seen by medical providers (e.g. anesthesiologists, surgeons, and nurses) to infectious and smoke particulates generated during anesthesia-related aerosol generating medical procedures (AGMPs) and pediatric otolaryngologic surgeries (with and without an intubated airway). The second goal of this study is to apply a local exhaust ventilation system (LEVS) to re-evaluate the exposure seen by the same medical providers during the same AGMPs and surgeries.
Detailed description
Prior to the patient entering the OR, particle counters (Digital PM2.5 Air Quality detector, ExGizmo, China) will ensure that the OR air quality has undergone the appropriate airflow exchanges and thus will all read 0.
Measurements will be taken every 30 seconds. A research assistant in the periphery of the OR will observe and record the following events: patient entrance into the OR, initiation of mask induction, intubation, rotation of OR table for surgery, initiation of surgery, completion of surgery, rotation of OR back to anesthesia, extubation, and patient departure from the OR. The particle counters will be positioned accordingly: 1) at the level of the patient's head, 2) at the level of the anesthesiologist/surgeon performing the AGMPs, 3) to the right of the patient, 4) to the left of the patient, 5) at the anesthesia workstation, and 6) at the circulating nurse's computer in the corner of the room. The particle counters will continue with measurements until the patient exits the OR. For patients randomized to the LEVS group, active suction will be provided through the use of a closed biohazardous smoke evacuation system (Neptune 3, Stryker, Michigan, USA) equipped with an internal high efficiency particulate air (HEPA) filter capable of capturing aerosolized particles as small as 0.1 mm with 99.99% efficiency via suction power up to 25 cubic feet per minute air exchange. The active suction will be positioned near the patient's airway without interfering with the AGMP, and across from the location of the anesthesiologist or surgeon performing the AGMP such that no HCW is positioned between the patient's airway and the suction device.
Study design
- Primary purpose
- Other
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Pediatric Patients | Experimental | Device: Disposable oxygen face tentParticipants undergoing anesthesia-related aerosol generating medical procedures (AGMPs) and pediatric otolaryngologic surgeries will have a local exhaust ventilation system to the exposure seen by the medical providers during the AGMPs and surgeries. |
Who may qualify
- Ages
- 2 to 18 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult
Key inclusion criteria (1 listed)
- children receiving anesthesia-related aerosol generating medical procedures
Key exclusion criteria (2 listed)
- patients with positive COVID symptoms
- positive preoperative COVID testing
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Disposable oxygen face tentDisposable oxygen face tent used to minimize aerosol particles (through suction) during aerosol generating anesthesia procedures. | Device | Pediatric Patients |
Primary outcome
Aerosolized particle concentration in air
Time frame: Up to 60 minutes
To measure the particle concentrations in the air (μg/m^3), particle counters will be located at each of the different healthcare worker positions in the operating room (OR) during an aerosol generating procedure either with a local evacuation system or without one. Measurements will be taken every 30 seconds from prior to the patient entering the OR to patient departure from the OR.
Results and safety
The study was withdrawn before enrolling participants, so there are no results.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 May 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Ban C Tsui, MD study director
Stanford University
Stephanie Pan, MD principal investigator
Stanford University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Disposable oxygen face tent in people with Risk Reduction, run by Stanford University at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: withdrawn, as of the sponsor's last update on 4 May 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was withdrawn before enrolling participants, so there are no results.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Aerosolized particle concentration in air (time frame: Up to 60 minutes). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 May 2025.