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General Information

Model ID

3DPX-015674

Category

Labware & Devices

Device Use

Safety and Personal Protective Equipment

Keyword(s)

COVID-19, PPE, 3D-Printing, Respiratory Protection, PAPR

Two designs for Powered Air Purifying Respirators (Panfab PAPRs) with modular and interchangeable components were engineered and tested to NIOSH-equivalent standards. Specifically, the following top level components were developed-

Custom made Blower Unit (known as Custom Blower Unit, current repository)
Custom made Filter (known as Custom Filter, repository titled “PanFab Powered Air Purifying Respirator- Custom Filter”, NIH 3D Print Exchange Model ID: 3DPX-015672)
Blower Unit with modified commercially available housing (known as Commercial Blower Unit, repository titled “PanFab Powered Air Purifying Respirator- Commercial Blower Unit”, NIH 3D Print Exchange Model ID: 3DPX-015671)
Filter Assembly with modified commercially available HEPA filter (known as Commercial Filter, repository titled “PanFab Powered Air Purifying Respirator- Commercial Filter”, NIH 3D Print Exchange Model ID: 3DPX-015673)

The devices were tested on human subjects including healthcare workers, under a protocol approved by the Partners Healthcare Institutional Review Board. PanFab PAPRs provide superior respiratory protection as compared to N95 masks and avoid the issues with fit common with those masks. These low cost PanFab PAPRs also performed favorably compared to commercially available PAPRs in terms of comfort and sense of security. The associated designs are available under a non-restrictive Creative Commons license.
This repository provides CAD files of parts pertinent to the Custom Blower Unit, that are to be 3D printed, injection molded, or machined.
For a detailed discussion of design and testing, please read the pre-print found here: https://www.medrxiv.org/content/10.1101/2021.03.25.21252076v1

3D Modeling/CAD Software

Fusion 360

Model Origin

Custom illustration/CAD

External Derivative Source

PanFab PAPRs

How to Make

Printer Make/Model

RailCore II 300ZLT FDM Printer for parts made with PETG and Anycubic LCD SLA Printers (Photon S and Mono X) for parts made with resin

Print Units

Printer-specific Build Instructions

Specific material

Polyethylene Terephthalate Glycol (PETG) for parts made on FDM printer and SirayaTech Blu for parts made on SLA printer

Pre- and Postprocessing Instructions

FDM parts should be printed with dense infill (up to 100%), with support. Part files should be in print orientation, but in the event they are not, the threads should be printed perpendicular to the build plate (i.e. thread axis aligned with z azis).
For SLA parts, orient optimally for your printer (note- every printer is a little different, a Form 3 will have different capabilities than an Anycubic Photon). Optional post-processing step: spray coat with urethane sealant.
SLA printer recommended for all parts to avoid porosity. Although Custom Blower Unit Bin and Custom Blower Unit Lid were printed on FDM printer due to size limitations on Anycubic Mono X printer, a larger size SLA/SLS printer recommended for these parts, particularly to achieve a flat gasket seat on the Lid.

Venturi Port to be machined.

Attribution

PubMed ID

33 821 290

Digital Object Identifier (DOI)

10.1101/2021.03.25.21252076

Attribution Instructions

https://www.medrxiv.org/content/10.1101/2021.03.25.21252076v1

Please cite article and/or panfab.org

Documentation

Supplemental Documentation