Most doctors are now able to recognize Littmann brand. The name came to be well known in the medical industry after innovation made by Dr Littmann. In the year 1960, a doctor of Harvard medical school, developed a new design of the stethoscopes and they become an important diagnostic tool. However, their history is not the one that made them to be important but it is their reliability and reputation. Even if there are other brands that reached to the market after Littmann, it continues to have a predominant position and it continues to be a favorite choice of many specialists and doctors.
Read https://stethoscopes.ninja/littmann-stethoscopes/, to know the reasons behind the popularity of Littmann stethoscopes
They have come to be the favorite choice of many doctors, however there are reasons they the stethoscopes are a success.
If you want to know more about Littmann, you have to start by learning about its dual frequency diaphragm. In the Littmann stethoscopes, the chestpieces have two membranes. There is a membrane that have small diameter and it is called a bell while another membrane has larger diameter and it is called a diaphragm. Within the stethoscope, every membrane has its own function. A bell is used to auscultate at low frequency but a diaphragm auscultate at higher frequency.
Since the dual frequency membrane is found at each side of a chestpiece, it is possible to auscltate at low and high frequency at the two sides.
When low pressure is applied at a patient, using a bell mode, then the doctor gets low frequency sound. If a firmer pressure is applied on a patient, or diaphragm mode, then the doctors get high frequency sounds.
With this innovation, the side of a small diameter may be used to get carotid and pediatric auscultations. All the stethoscopes from Littmann use the dual frequency membrane but not the one for Pediatric and infant use.
Before you decide in any of the stethoscope to buy, you should read https://stethoscopes.ninja/littmann-stethoscopes/ to know their different features, performance and level of acoustic fidelity. If you are an internist or a cardiologist for example, you need a digital stethoscope with better performance.