The PAPR Lens-Cuff shield system was designed by bioengineers to meet clinical shortage in these shields.  Depending on the brand of PAPR helmets, these can either fit without modifications, or, if needed, a 3d printed frame adaptor may be needed to adapt the PAPR shields to the helmet's retentive elements.  The attached components are compatible with common digital cutting techniques (laser and waterjet) to enable a scalable solution that provides seal, durability, and comfort.  The materials are compatible with hospital grade disinfectants should they be re-used.

The DWG files included are for cutting 1) a clear lens from a sheet of transparent polymer material; 2) a cuff from a rubber sheet (e.g. neoprene or latex rubber); 3) flappers from a sheet of stiff, opaque polymer material; and 4) an arc from a sheet of opaque polymer material. The 3D printable guide posts assist with assembly. All drawing units are in milimeters (mm). Slow setting cyanoacrylate-based glues are recommended for assembly in clean environment with proper PPE.

Designed by Chase Linsley, PhD, Yulong Zhang, PhD and Ben Wu, DDS, PhD from UCLA Department of Bioengineering, UCLA School of Dentistry, and Weintraub Center for Reconstructive Bioengineering.  Many people from UCLA COVID PPE^2 team contributed to getting this mass produced for our front line health care providers.

Disclaimer: Although extensively tested, this design has not been officially approved by any recognized institution or organizations. NO WARRANTIES OF ANY KIND ARE OFFERED FOR THESE DEVICES AND ASSOCIATED EQUIPMENT DESIGNS AND SPECIFICATIONS, INCLUDING WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.