Stethoscope

▼This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printingPlease leave comments using the talk page. The course runs in the Fall semester. It is not open edit.

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.

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

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

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

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.

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

• 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