Aerosol protection using modified N95 respirator for upper gastrointestinal endoscopy: A randomized control trial

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Interventional

Source

TCTR

Registry ID

TCTR20220121006

Enrollment

Registered

2022-01-21

Start date

2022-02-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Patients receiving upper gastrointestinal endoscopy Upper gastrointestinal endoscopy, N95, Particle count, Aerosol

Interventions

We created two perpendicular 10.4-mm slit through N95 respirator (3M Aura, 1870+) for endoscopic shaft insertion. Patients in this group will wear this modified N95 before receiving procedure. Particl

Experimental Device,No Intervention No treatment

Modified N95,Control

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Patients receiving upper gastrointestinal endoscopy with negative result of RT-PCR for COVID-19 within 48 hours prior to procedure

Exclusion criteria

Exclusion criteria: Requiring general anesthesia with endotracheal intubation, Transnasal upper gastrointestinal endoscopy, Transnasal endoscopic procedure or feeding tube insertion, Out of the scope therapeutic procedure (e.g. Dilation with Savary-Gillard), Previous upper gastrointestinal tract surgery

Design outcomes

Primary

Measure	Time frame
Particle count after finish procedure TSI aerotrak handheld particle	—

Secondary

Measure	Time frame
Particle size after finish procedure TSI aerotrak handheld particle,Duration of procedure after finish procedure minutes	—

Countries

Thailand

Contacts

Public ContactChawisa Nampoolsuksan

Siriraj hospital

c.nampoolsuksan@gmail.com0909905514

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026