Stethoscope

Medical device

Stethoscope

Description	This Stethoscope only requires some surgical tubing or similar airtight tubing and 3D printed parts.
Keywords	3D printing, stethoscope, medical equipment, cardiology
Uses	medical, development
Authors	Brett Barker
Status	Prototype
Made?	Yes
Replicated? Was this project made independently by someone other than the authors and without their guidance?	No
Countries of design	United States
Materials	Plastic
Estimated cost	USD 1.13
Sustainable Development Goals	SDG03 Good health and well-being SDG08 Decent work and economic growth
Documentation data
Language	English
Manifest data
Language	English
Updated	2020-06-04
Author	Kathy Nativi
Author affiliation	Appropedia
Author email	info@appropedia.org

This Open Source Appropriate Technology has been prototyped.

The Stethoscope is one of the most basic medical tools. It allows a trained medical professional to diagnose issues with the heart and lungs. Stethoscopes come in a range of prices and quality, but all are breakable. This Stethoscope only requires some surgical tubing or similar airtight tubing and 3D printed parts.

Bill of Materials

• BOM
  • 3D printer
    • Filament
    • STL and/or OpenScad files
      • Thingiverse
      • Media:Stethoscope ears.scad
      • Media:Stethoscope.scad
  • Surgical tubing

Tools needed for fabrication of the OSAT

1. MOST Delta RepRap or similar RepRap 3-D printer
2. Knife or scissors

Skills and Knowledge Necessary to Make the OSAT

• No special skills needed to build, To use this device propertly takes some training.
  • Stethoscope Overview

Technical Specifications and Assembly Instructions

1. There are 7 seperate prints for this device listed below with there print times (depending on your printer and settings)
   1. Bell
      1. Approximately 2 hours
   2. Y tubing joing
      1. Approximately 1/2 hour
   3. 2 small tubes
      1. Approximately 1 hour each
   4. Cross piece
      1. Approximately 3 hours
   5. 2 earpieces
      1. Approximately 4 hours each
2. Assembly time depends on how much post-printing corrections you need to do. Some filing or sanding may be necessary for a great fit.
   1. 
   2. Cut the tubing to desired length,
      1. About a 1.5 feet from the bell to the Y joint
      2. 2 at about 4 inches from the Y joint to the small straws
      3. 2 small tapered pieces to act as ear buds on the end of the long earpieces
   3. Simply fit the pieces together, I did not use any glue but that is an option.

Common Problems and Solutions

• For a really tight plastic on plastic fit, some sanding or filing will need to be done.

Cost savings

• Costs
  • Plastic at $25 per kilogram, 45 grams, $1.13
  • Rubber tubing $2.30 per foot, 2 feet, $4.60
• Commercial Equivelent
  • Low cost - $7.99 - pedometerusa
  • High cost - $75 - Littmann
• Savings between $2.26 and $69.27