Stethoscope Tips
How to Remove your MDF® Instruments Diaphragm and Retaining Ring from the Chestpiece
Your diaphragm is the airtight seal drum with the MDF® logo and the retaining ring in the rubber piece around it securing the part on the stethoscope. This side of the dual head chest piece is used to listen to high frequency sounds. Sometimes the diaphragm will crack or get dirty after sometime of use, this is why we offer it under our Free-Parts-For-Life program! We are here to assist with the process to change out your stethoscope parts for fresh ones.
To remove the diaphragm and retaining ring from your stethoscope, put pressure on the outer edge of the retaining ring using your thumbs pushing it down, away from the chestpiece. This will loosen the diaphragm. Then continue to pull the retaining ring up and over the chestpiece.

Free Shipping & Returns
Free shipping on Orders over $49.99
Need we say more?

90-Day GUARANTEE
We like to keep things simple. If you’re not satisfied, you have 90 days to return your order.

LIFETIME WARRANTY
Because of our relentless pursuit of quality, we back our stethoscopes with a Lifetime Warranty.
Shop engravable stethoscopes


ProCardial® Titanium Cardiology Stethoscope - White Glitter/Gold


ProCardial® Titanium Cardiology Stethoscope - Bella Azure/Gold


ProCardial® Titanium Cardiology Stethoscope - XOXO/BlackOut


ProCardial® Titanium Cardiology Stethoscope - Green Glitter/Gold


ProCardial® Titanium Cardiology Stethoscope - Mermaid/Rose Gold


ProCardial® Titanium Cardiology Stethoscope - Black Glitter/Gold


ProCardial® Titanium Cardiology Stethoscope - Galaxy/BlackOut


ProCardial® Titanium Cardiology Stethoscope - Peacock/Rose Gold


ProCardial® Titanium Cardiology Stethoscope - Mermaid/Gold


ProCardial® Titanium Cardiology Stethoscope - Cheetah/BlackOut
MDF® INSTRUMENTS
WATCH MORE VIDEOS
Unsung Boricua
An island, its people, and a man in the pursuit of a brighter future. A story that sheds light on resilience, and how we can always get back up, no matter how many times we’re knocked down.
View DetailsLet Your Dreams Be Bigger Than Your Fears...
Life doesn't always happen on our timeline or in the order we would like. What happens when you get derailed from your plans? Gabriela sat down with us to talk about how she navigated not getting into Veterinarian School the first time, and how she turned lemons into lemonade.
View DetailsInterview - You Say Doctor, I Say Magician
As a little boy from Haiti, this Emergency Medicine Doctor thought the person giving him medicine to fix his asthma was a magician. That belief would inspire young Gagou to one day become a magician himself. Watch our latest podcast and hear how struggles, tribulations and obstacles were overshadowed by a belief in magic.
View DetailsNewsletter
Sign up to receive 10% off your first purchase!