A Novel Method for Designing and Fabricating Low-cost Facepiece Prototypes

Joe, Paula S.; Shum, Phillip C.; Brown, David W.; Lungu, Claudiu T.

doi:10.1080/15459624.2014.908260

Cited by 9 publications

(5 citation statements)

References 11 publications

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“…However, as previously published, hollow silicone models proved difficult to produce [14]. Studies have suggested a rotisserie method of manufacture in which the model is rotated while the silicone cures to ensure an even distribution of material [25, 26].…”

Section: Discussionmentioning

confidence: 99%

Advanced 3D printed model of middle cerebral artery aneurysms for neurosurgery simulation

et al. 2019

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BackgroundNeurosurgical residents are finding it more difficult to obtain experience as the primary operator in aneurysm surgery. The present study aimed to replicate patient-derived cranial anatomy, pathology and human tissue properties relevant to cerebral aneurysm intervention through 3D printing and 3D print-driven casting techniques. The final simulator was designed to provide accurate simulation of a human head with a middle cerebral artery (MCA) aneurysm.MethodsThis study utilized living human and cadaver-derived medical imaging data including CT angiography and MRI scans. Computer-aided design (CAD) models and pre-existing computational 3D models were also incorporated in the development of the simulator. The design was based on including anatomical components vital to the surgery of MCA aneurysms while focusing on reproducibility, adaptability and functionality of the simulator. Various methods of 3D printing were utilized for the direct development of anatomical replicas and moulds for casting components that optimized the bio-mimicry and mechanical properties of human tissues. Synthetic materials including various types of silicone and ballistics gelatin were cast in these moulds. A novel technique utilizing water-soluble wax and silicone was used to establish hollow patient-derived cerebrovascular models.ResultsA patient-derived 3D aneurysm model was constructed for a MCA aneurysm. Multiple cerebral aneurysm models, patient-derived and CAD, were replicated as hollow high-fidelity models. The final assembled simulator integrated six anatomical components relevant to the treatment of cerebral aneurysms of the Circle of Willis in the left cerebral hemisphere. These included models of the cerebral vasculature, cranial nerves, brain, meninges, skull and skin. The cerebral circulation was modeled through the patient-derived vasculature within the brain model. Linear and volumetric measurements of specific physical modular components were repeated, averaged and compared to the original 3D meshes generated from the medical imaging data. Calculation of the concordance correlation coefficient (ρc: 90.2%–99.0%) and percentage difference (≤0.4%) confirmed the accuracy of the models.ConclusionsA multi-disciplinary approach involving 3D printing and casting techniques was used to successfully construct a multi-component cerebral aneurysm surgery simulator. Further study is planned to demonstrate the educational value of the proposed simulator for neurosurgery residents.

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Section: Discussionmentioning

confidence: 99%

Advanced 3D printed model of middle cerebral artery aneurysms for neurosurgery simulation

et al. 2019

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“…In addition to the use of cloth masks, researchers, and manufacturers have also paid attention to fabricating personal protective equipment (PPE), including masks and their components, by utilizing 3D printing (namely, Additive Manufacturing (AM)) to alleviate the shortage of surgical masks and respirators. [ 122 , 123 , 124 , 125 , 126 , 127 , 128 , 129 ] 3D printing is a novel and innovative rapid prototyping technology, and it can be used to fabricate complex geometric structures which connot be easily fabricated through traditional manufacturing process. [ 130 , 131 ] There are a host of various materials that can be used as the base material in 3D printing, such as polyamide (PA) composite, acrylonitrile butadiene styrene (ABS), nylon PA, polylactic acid (PLA), ULTEM (polyetherimide), and thermoplastic polyurethane (TPU).…”

Section: Choices Of Common Face Mask and Respiratormentioning

confidence: 99%

Masks for COVID‐19

et al. 2021

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Sustainable solutions on fabricating and using a face mask to block the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) spread during this coronavirus pandemic of 2019 (COVID‐19) are required as society is directed by the World Health Organization (WHO) toward wearing it, resulting in an increasingly huge demand with over 4 000 000 000 masks used per day globally. Herein, various new mask technologies and advanced materials are reviewed to deal with critical shortages, cross‐infection, and secondary transmission risk of masks. A number of countries have used cloth masks and 3D‐printed masks as substitutes, whose filtration efficiencies can be improved by using nanofibers or mixing other polymers into them. Since 2020, researchers continue to improve the performance of masks by adding various functionalities, for example using metal nanoparticles and herbal extracts to inactivate pathogens, using graphene to make masks photothermal and superhydrophobic, and using triboelectric nanogenerator (TENG) to prolong mask lifetime. The recent advances in material technology have led to the development of antimicrobial coatings, which are introduced in this review. When incorporated into masks, these advanced materials and technologies can aid in the prevention of secondary transmission of the virus.

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“…3D-printed polymer-based parts are increasingly used in various medical equipment and consumer products, where emissions from the printed part could present a health hazard or nuisance odors. Before the COVID-19 pandemic, researchers explored the use of 3D-printed respirators for applications such as better fitting face masks − or medical implants, but this research rapidly accelerated from 2020 to 2021. ,, Additionally, 3D-printed parts are now frequently used in sensitive analytical instrumentation. , some of which are designed to measure pollutants that the parts themselves could emit . Uncharacterized emissions could potentially induce error, bias, or artifacts into measurements made with 3D-printed parts.…”

Section: Introductionmentioning

confidence: 99%

Chemical Emissions from Cured and Uncured 3D-Printed Ventilator Patient Circuit Medical Parts

et al. 2021

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Medical shortages during the COVID-19 pandemic saw numerous efforts to 3D print personal protective equipment and treatment supplies. There is, however, little research on the potential biocompatibility of 3D-printed parts using typical polymeric resins as pertaining to volatile organic compounds (VOCs), which have specific relevance for respiratory circuit equipment. Here, we measured VOCs emitted from freshly printed stereolithography (SLA) replacement medical parts using proton transfer reaction mass spectrometry and infrared differential absorption spectroscopy, and particulates using a scanning mobility particle sizer. We observed emission factors for individual VOCs ranging from ∼0.001 to ∼10 ng cm–3 min–1. Emissions were heavily dependent on postprint curing and mildly dependent on the type of SLA resin. Curing reduced the emission of all observed chemicals, and no compounds exceeded the recommended dose of 360 μg/d. VOC emissions steadily decreased for all parts over time, with an average e-folding time scale (time to decrease to 1/e of the starting value) of 2.6 ± 0.9 h.

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A Novel Method for Designing and Fabricating Low-cost Facepiece Prototypes

Cited by 9 publications

References 11 publications

Advanced 3D printed model of middle cerebral artery aneurysms for neurosurgery simulation

Advanced 3D printed model of middle cerebral artery aneurysms for neurosurgery simulation

Masks for COVID‐19

Chemical Emissions from Cured and Uncured 3D-Printed Ventilator Patient Circuit Medical Parts

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