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The new Cardiology IV versus Cardiology III by Littmann

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We have had a lot of question regarding the differences between the new and improved Littmann Cardiology IV Stethoscopes and the Cardiology III Stethoscopes. This is a very large topic so for today we will stick to the chest piece or bell.

First here are some features the new Cardiology offers:

Better audibility of high-frequency sounds* helps you learn more about your patient’s condition.

Single-piece tunable diaphragms let you hear high and low frequency sounds on both the adult and pediatric sides of the chest-piece.

Pediatric side converts to an open bell. Just remove the single-piece diaphragm and replace it with a non-chill rim.

Open bell stays clear of dirt and debris by covering it with the small diaphragm.

These are just some of the improvements that Littmann has made to the Cardiology IV stethoscope. Some other key differences between the Cardiology III and the Cardiology IV are:

-The diaphragm and rim is now a one piece unit instead of a separate rim and diaphragm that would have to be put together then installed on the stethoscope, the two piece process was very hard to install and opens the way for pathogens and cross contamination to occur.  

-One other key feature is the shape and height of the bell, the Cardiology III has a great audio to its bell however the new Cardiology IV has been made to be more acoustically enhances with smoother edging and a shorter height allow sound to travel a shorter distance with less turns.

-Lastly the weight of the bell is over 5 grams lighter than the Cardiology III therefore for those medical professionals that need to have it on them all day the lighter weight can really add longevity to the workers day, therefore delaying fatigue for a little longer


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