Medical-grade Stethoscope v2.0

myminifactory

This project is a collaborative effort involving Alex Pavlosky, Jennifer Glauche, Spencer Chambers, Mahmoud Al-Alawi, Kliment Yanev, Carrie Wakem, Shaker Shaheen, Mohammed Khdair, Mohammed Abu Matar, and Tarek Loubani.\r\nThe goal of this project is to create a research-validated stethoscope whose plans are freely available. The target cost for the bell is around $1-$2, while the rest of the stethoscope should be priced similarly. You can view the peer-reviewed publication related to this stethoscope's validation at http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0193087.\r\nCurrently, the stethoscope developed through this project performs as well as the market standard, the Littmann Cardiology III.\r\nBill of MaterialsPrinted parts:\r\n1 stethoscope head (head.stl)2 ear tubes (eartube.stl)1 Y-piece (y_piece.stl)1 Spring (spring.stl)\r\nOther hardware: Some vendors are recommended.\r\n40cm - 50cm Silicone 13mm (preferred) or 12mm OD, 8mm ID, 50 durometer\r\n8MM I.D X 13MM O.D NGP60 Clear Translucent Silicone Hose Pipe Tubing (USD$7.34/meter)20cm Silicone 8mm (preferred) or 6mm OD, 4mm ID (cut into 10cm pieces), 60 durometer\r\n4mm ID x 8mm ODDiaphragm: 40mm diameter cut from a report cover with approx 0.35mm plastic sheet\r\nStaples 21639 report cover (UPC 718103160223) (USD$8.84)\r\nYou can cut the diaphragm by hand or with a stamp like this oneEarbuds / Eartips: Any large-sized standard earbuds will do.Silicone Earbuds 7 Pairs - Large sizeOptional hardware:\r\nMetal spring for holding ear tubes together\r\nPrint InstructionsINFILL MUST BE 100% INFILL MUST BE 100% INFILL MUST BE 100% INFILL MUST BE 100%\r\nUse PETG or ABSLayer height: 0.2mmUse PrusaSlicer 2.0 or above to import 3MF fileModify filament and printer settings as needed.DO NOT MODIFY PRINT SETTINGSExport and printTroubleshootingIf the spring and eartubes do not fit well, scale the spring as neededIf the head and ring do not fit well, use caution as you may be modifying the acoustics. You can scale the head a little.NotesWe do not use PLA due to deformation in heat and poor plastic quality in the spring. However, we present our work under the TAPR OHL license insofar as it applies.\r\nAs per our understanding, hardware is not covered by copyright.