A Portable Negative Airflow Box to Control Exposure for Aerosol-Generating Procedures During Coronavirus Disease 2019 (COVID-19) Pandemic

Cárdenas-Mancera, Jennifer; Valencia‐Arango, Lina M.; Segura-Salguero, Juan Camilo; Díaz-Bohada, Lorena

doi:10.1053/j.jvca.2020.07.059

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…These include headboard ventilation in alternative care sites [7], the creation of temporary anterooms with plastic barriers and portable air purifiers [234], personal portable booths with pressure differential control using fan-HEPA filter units [350], and the establishment of temporary negative-pressure rooms [351]. Another approach to source control is the use of aerosol boxes to protect healthcare staff during medical procedures (e.g., intubation) that generate aerosol from patients [352][353][354].…”

Section: Indoor Generation Of Contaminants and Source Controlmentioning

confidence: 99%

Review of Engineering Controls for Indoor Air Quality: A Systems Design Perspective

2023

Sustainability

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This paper aims to review the engineering controls for indoor air quality (IAQ) from a systems design perspective. As a result of the review, we classify the literature content into three categories: (1) indoor air treatments, (2) dissemination control strategies, and (3) information technology. Indoor air treatments can be generally interpreted as the “cleaning” aspect, which covers ventilation and contaminant removal techniques. Dissemination control focuses on how contaminants generated in an indoor space can be transmitted, where four types of dissemination are classified. The category of information technology discusses IAQ sensors for monitoring, as well as the applications of the Internet of Things and IAQ data. Then, we further analyze the reviewed engineering controls by performing systems and functional analysis. Along with a discussion of IAQ functions, we suggest some systems design techniques, such as functional decoupling and design for flexibility/resilience, which are expected to promote more systems thinking in designing IAQ solutions.

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Section: Indoor Generation Of Contaminants and Source Controlmentioning

confidence: 99%

Review of Engineering Controls for Indoor Air Quality: A Systems Design Perspective

2023

Sustainability

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“…A possible solution for such procedures would be the use of a protective box. The idea of a protective box first appeared in 2020 [9] and soon, multiple improvements were published [10][11][12][13][14]. The primary idea is to assemble a box-like object around the patient's head and upper torso, which would contain any droplets and aerosols generated by the patient.…”

Section: Introductionmentioning

confidence: 99%

Size- and Time-Dependent Aerosol Removal from a Protective Box during Simulated Intubation and Extubation Procedures

Pirker

Čebašek²,

Serdinšek

et al. 2021

COVID

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Because the SARS-CoV-2 virus primarily spreads through droplets and aerosols, a protective box could provide adequate protection by shielding medical professionals during the intubation and extubation procedures from generated droplets and aerosols. In this study, size- and time-dependent aerosol concentrations were measured inside and outside the protective box in the particle size ranging from 14 nm to 20 μm during simulated intubation and extubation procedures. An improved protective box with active ventilation was designed based on a plastic bag with armholes covered with latex sheets that utilizes a supportive frame. Coughing during the intubation and extubation procedure was simulated using an aerosol generator which dispersed the aerosol powder into the protective box. During the intubation and extubation procedure, the concentration of particles increased inside the protective box but, due to the high negative airflow, quickly dropped to background levels. The particle concentration of all measured particle sizes decreased within the same time frame. No leakage of particles was observed through the armhole openings. The presented protective box design provides excellent protection against generated droplets and aerosols. The decrease in concentration does not depend on the particle size. Outside the box, particle concentration did not change with time.

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Design and Development of Mobile Operated Portable Ventilator.

2021

IJESRT

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This paper describes the concept of full function portable ventilator, which have low cost, minimum weight, compact, small-sized. It can easily operate by mobile application and that application able to measure PEEP pressure, tidal volume and flow rate. The essential components used are stepper motor, rack and pinion, motor driver, Nod MCU, Acrylic sheet, Battery etc. There are some open sources Hardware ventilator (OSM-MVs) have been used during COVID-19 Pandemic. The ventilator device breaths by compressing a convention bag-valve mask (BVM) with a help of Rack and Pinion, that eliminate the need of human operator for the BVM. Initially the prototype is built out by Acrylic Sheets, it is work as thermal insulator and it's approximately 20% better than glass. The measurement of portable ventilator is 9.8*4.7*7 inches (250*120*180) mm and weighting 2.20lbs (1.5kg). It is driven by the motor driver powered by a VDC battery. The sensors are used to operate it by a mobile operation for measurement of tidal volume, PEEP pressure etc. The design is made up of CAD software and also makes Ansys for this device. The experimental results taking after testing on artificial lung that where the Positive Inspiratory Pressure (PIP), respiratory rate (RR), tidal volume, Positive end- expiratory pressure (PEEP) and its accuracy exceeding human capabilities in BVM.

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A Portable Negative Airflow Box to Control Exposure for Aerosol-Generating Procedures During Coronavirus Disease 2019 (COVID-19) Pandemic

Cited by 4 publications

References 4 publications

Review of Engineering Controls for Indoor Air Quality: A Systems Design Perspective

Review of Engineering Controls for Indoor Air Quality: A Systems Design Perspective

Size- and Time-Dependent Aerosol Removal from a Protective Box during Simulated Intubation and Extubation Procedures

Design and Development of Mobile Operated Portable Ventilator.

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