Ramping up to half a million 3D printed test swabs

Traditionally manufactured nasopharyngeal swabs have a polyester handle and a tip with tiny rayon or nylon fibers. To test for COVID-19, the swab is inserted through the nose, deep into the nasal cavity, twirled and broken off into a vial to ship to a testing lab.

 

• The two major manufacturers of nasopharyngeal swabs produce, assemble, sterilize and package the swabs, using proprietary manufacturing methods and equipment.
• These companies found themselves unprepared for supply chain disruptions and were unable to scale quickly to meet worldwide demand.

 

As with other PPE shortages, like face shields, 3D printing emerged as a novel solution with rapid product development and production capabilities that allowed for the design, prototyping, testing and mass production of nasopharyngeal swabs made of medical grade photopolymer materials.

Origin (acquired by Stratasys in early 2021) set forth to produce clinically-tested, FDA-registered test swabs at scale. Origin collaborated with Henkel, Harvard’s Beth Israel Deaconess Medical Center (BIDMC), and other 3D printing leaders to develop a one-piece, FDA-compliant, sterile, 3D-printed NP test swab. Origin was able to quickly produce many different designs for clinical evaluation at the same time, in a single build envelope. The resulting swabs are made of a single material, with no injection molding tooling or assembly required. Their lattice design makes sample collection easy and comfortable, with a break point for the sample to be added to the vial and sent to the lab.

The Origin team validated the swab’s mechanical capabilities and manufacturability, while Henkel, the material provider, tested the swabs for biocompatibility and validated the complete workflow. The Origin swabs went through phase 3 human clinical trials conducted by Harvard’s Beth Israel Deaconess Medical Center (BIDMC) and were determined to have a high concordance and statistically indistinguishable from the traditional swab.

 

Anecdotal evidence suggests that the Origin design’s lattice tip can improve specimen collection, due to the low liquid absorption quality of the material and unique design. Longer term, this has the potential to make less accurate diagnostics systems perform better when there is a very low viral load in the patient.

Stratasys Origin One and its Programmable Photopolymerization P3™ technology are an ideal solution for rapid development and production of medical components. Materials from Stratasys’ ecosystem material partner network include medical-grade materials from multiple global chemical companies that can be brought quickly into the Stratasys ecosystem, validated and put into production. In the early stages of the product’s development, Origin surveyed no less than 20 materials, many of which had the ability to pass the biocompatibility requirements, before deciding on LOCTITE MED412 for its unique stiffness and flexibility.

 

The company was able to ramp up from passing clinical trials to mass production in a matter of days, a far cry from traditional injection molding tooling lead times. Plus, it was possible to easily increase capacity by dedicating additional 3D printers to production. During the same time period, Origin’s customers also produced thousands of units of PPE, respirator components and ventilator components, demonstrating the ability of the technology to be used for various other applications in short supply.

 

The Stratasys Origin One’s printing technology and access to high-performance materials enable fast iterations and accelerated concept development. This makes it an ideal choice for the rapid development and production of biocompatible components, and it’s what enabled the company to swiftly lend a helping hand during an unprecedented global pandemic.