Study for Testing and Reviewing Improvised PPE Effectiveness 3 (STRIPE-3)

NCT04362163 | Completed

• 1 other identifier: TAP_PRG_21_04_2020_2
• Study Type: observational
• Target: 10
• Locations: 1 country
• Sites: 1

Brief Summary

Personal protective equipment (PPE) is vital to ensuring staff safety during the COVID-19 pandemic. Properly designed, formal PPE (fPPE) is in increasingly short supply, and a series of improvised PPE (iPPE) designs have been widely circulated on the internet, particularly on social media. Groups have started to publicise these devices through websites and the lay press. Some are even using crowd-funding to finance the purchase of these systems with the intention of supplying NHS workers in place of approved systems. It is not clear what degree of testing these systems have undergone. The investigators are already planning trials formally investigating the quality of seal offered by these improvised systems. Currently the team are investigating a designed based on a modified snorkel mask (STRIPE-1). In the current study the investigators wish to extend this investigation to consider the atmosphere within the mask. This is an important question, as modifications to the snorkel design have changed the way gases mix within the system. This might increase the risk that the user will rebreathe expired gases, which will dilute the amount of oxygen available to them, and increase the carbon dioxide levels to which they are exposed. At extreme deviations, these might pose a potential health hazard over and above the risks posed by COVID-19 exposure via a poor mask seal. This study will therefore recruit a convenience sample of 10, and request they wear two masks sequentially. These masks will comprise: a formally designed and tested commercial FFP3 mask, and one design of improvised PPE, based on the snorkel design available on the internet. Each mask will be worn for a total of 40 minutes. In the first 20 minutes measurements will be taken with the user at rest. In the second 20 minutes measurements will be taken while the user undertakes light exercise.

Conditions

Healthy

Keywords

Personal protective equipment

Outcome Measures

Primary Outcomes (2)

• Oxygen concentration while wearing purpose-designed mask

  5-minute measurement of oxygen concentration in inspired and expired gases

  40 minutes starting from intervention (donning of mask)

• Oxygen concentration while wearing improvised snorkel-based mask

  5-minute measurement of oxygen concentration in inspired and expired gases

  40 minutes starting from intervention (donning of mask)

Secondary Outcomes (8)

• Carbon dioxide concentration while wearing purpose-designed mask

  40 minutes starting from intervention (donning of mask)

• Carbon dioxide concentration while wearing improvised snorkel-based mask

  40 minutes starting from intervention (donning of mask)

• Heart rate while wearing purpose-designed mask

  40 minutes starting from intervention (donning of mask)

• Heart rate while wearing improvised snorkel-based mask

  40 minutes starting from intervention (donning of mask)

• Respiratory rate while wearing purpose-designed mask

  40 minutes starting from intervention (donning of mask)

Interventions

Snorkel-based improvised personal protective equipment DEVICE

An improvised PPE design based on a full face snorkel mask mated to a heat-and-moisture exchange filter via a 3D printed adaptor.

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Recruits will be drawn from amongst staff at Guy's and St Thomas' NHS Foundation Trust (London, UK) who are required to be fit-tested on tight-fitting FFP3 masks as part of their normal clinical duties.

You may qualify if:

• Willing and able to give informed consent for participation in the study
• Healthy adults, male or female, aged 18 or more
• Clean-shaven at the point of testing
• Willing and able to undertake 20 minutes of light exercise e.g. stepping

You may not qualify if:

• They have facial hair that would disrupt the seals of the mask
• They have significant facial injuries or malformations that preclude a good mask seal

Sponsors & Collaborators

• Guy's and St Thomas' NHS Foundation Trust: lead

Study Sites (1)

St Thomas' Hospital

London, SE1 7EH, United Kingdom

Location

Study Officials

• Paul R Greig, MBChB

  Guy's and St Thomas' NHS Foundation Trust

  STUDY CHAIR

Study Design

• Study Type: observational
• Observational Model: CASE CROSSOVER
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 21, 2020
• First Posted: April 24, 2020
• Study Start: May 1, 2020
• Primary Completion: June 5, 2020
• Study Completion: June 5, 2020
• Last Updated: June 9, 2020

Record last verified: 2020-04

Data Sharing

• IPD Sharing: Will not share

Locations

GB (1)