An Investigation Into the Dispersion Pattern During Coughing and Open Nasopharyngeal Suction Using Various Barrier Devices

The aim of the study is to examine the air dispersion pattern and the environmental influence of open airway suction in general ward setting. Secondly, the study is aimed at identifying a simple & practical enclosure device in general ward. Suction will be performed in manikin in supine lying.

Nasopharyngeal suction will be performed by physiotherapist with working experience more than 1 years. Besides, surgical mask & enclosure tent will be adopted as the enclosure barrier device in this study.

Research Question

1. To assess the extent of the environmental contamination during coughing and simulated airway suction
2. To measure the air particle count during coughing and simulated open airway suction.
3. To evaluate how effective the enclosure barrier in reducing the air particle dispersion during open airway suction.

Study Overview

• Status: Completed
• Conditions: Airway Aspiration
• Intervention / Treatment: Device: Enclosure barrier

• Study Type: Observational
• Enrollment (Actual): 13

Contacts and Locations

Study Locations

• Hong Kong
  • Hong Kong, Hong Kong, 000000
    • North District Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

Registered physiotherapist

Description

Inclusion Criteria:

• physiotherapists with working experience more than one year

Exclusion Criteria:

• physiotherapists with working experience less than one year

Study Plan

How is the study designed?

Number of groups / cohorts

3

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
coughing with suction; Suction performed on manikin in simulated setting
coughing with suction covered by surgical mask; Suction performed on manikin in simulated setting	Device: Enclosure barrier; Surgical mask & Enclosure tent compared with open suction
coughing with suction covered by enclosure tent; Suction performed on manikin in simulated setting	Device: Enclosure barrier; Surgical mask & Enclosure tent compared with open suction

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Air particle count	The calibrated sizes are 0.3, 0.5. 1.0, 2.0, 5.0 and 10 microns	one minute

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
A fluorescent Dye	The extent and area of the fluorescent dye spreading are measured	one minute

Collaborators and Investigators

• Sponsor: North District Hospital
• Collaborators: The Hong Kong Polytechnic University
• Investigators: Principal Investigator: Connie TO, Msc, NDH

Study record dates

Study Major Dates

• Study Start (Actual): September 1, 2022
• Primary Completion (Actual): March 3, 2024
• Study Completion (Actual): March 3, 2024

Study Registration Dates

• First Submitted: April 9, 2024
• First Submitted That Met QC Criteria: April 17, 2024
• First Posted (Actual): April 23, 2024

Study Record Updates

• Last Update Posted (Actual): April 23, 2024
• Last Update Submitted That Met QC Criteria: April 17, 2024
• Last Verified: April 1, 2024

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Respiratory Tract Diseases; Respiration Disorders; Signs and Symptoms, Respiratory; Cough
• Other Study ID Numbers: 2022.354

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No