Hole in the diaphragm of the stethoscope is where

Proper use of a stethoscope

Correct use of a stethoscope is critical to proper auscultation results. We'll give you tips on how to use your stethoscope properly.

Function and structure of the stethoscope

The acoustic stethoscope consists of the chest piece, the tube and the ear hooks with the ear tips. The heart of the stethoscope is the chest piece. This is where the membrane is located, which is itself set in vibration by the acoustic waves from the heart, lungs or intestines. These are transmitted to the air column in the tube of the stethoscope and migrate via the ear hook to the examiner's eardrum.

On the other hand, there is usually no membrane on the funnel side of the chestpiece. This page is suitable for listening to low frequencies, which is particularly important in cardiology. A model with a two-hose system is often used here. A general distinction is made between single and double lumen in the hose system. Both mono tubing and dual lumen tubing are widespread today. The latter can only be recognized by the thicker diameter and the V-shape of its bracket, as it otherwise looks like a mono tube.
Dual lumen tubing

A good stethoscope always has soft, well-sealing ear tips and slightly inclined arms on the head part.

Instructions Correct use of the stethoscope

Make sure that the ear tips fit very well. To improve hearing quality, you can turn the temples slightly towards your nose. With high-quality stethoscopes, the temples can be individually adjusted.

The brisket

The stethoscope should only be used directly on bare skin so that rustling material does not distort the result. The contact between the skin and the chest piece must not be interrupted by anything. In order not to startle the patient with the cold chest piece, you can warm it up with the palm of your hand before putting it on.

To auscultate, put on the chest piece of the stethoscope with light pressure. Many stethoscopes are characterized by a double-headed chest piece, which has a funnel and a membrane (flat side) at the same time. With these double-sided stethoscopes, long-wave and short-wave tones can each be heard more precisely. To do this, the chest piece is rotated 180 degrees and placed on either the membrane or the funnel side. When turning, the hose attachment must be held at the same time so that the small opening in the hose is turned to the desired side. This is often made easier by an optical marking on the hose insert. Finally, snap the stethoscope head into the desired position. This is the only way to transmit the sound waves to the ears via the tube. If the membrane is open, the funnel is closed and vice versa.

Some Littmann stethoscopes have a chest piece with so-called dual-frequency technology, which makes low frequencies or higher frequencies audible by applying different pressure when putting on the device.
The Littmann Classic III stethoscope is an example.

In general, the membrane is used to hear higher frequencies - such as the breath - and the funnel is suitable for different heart sounds. The principle is always the same, regardless of whether it is a question of stethoscopes for veterinarians or physicians.

Careful handling and regular maintenance

There are a few things you should keep in mind to ensure that your stethoscope has a long life. Because dust and dirt that accumulate over time falsify the (hearing) result and reduce the sound performance. Therefore, clean your stethoscope regularly and thoroughly. Also make sure that the hose is not damaged that would affect the acoustics.

General information on care:
  1. Do not sterilize your stethoscope
  2. Keep it away from all liquids, solvents and oils
  3. Protect it from excessive heat and cold
  4. Disinfect it with a 70% alcohol solution
  5. Take off the ear tips when cleaning it
  6. Do not wear your stethoscope directly on your skin, but rather over your clothing (otherwise the PVC tubing will become hard over time)

Large selection at Lehmanns

In the Lehmanns medicine shop you will find high-quality stethoscopes from Littmann for all areas of human medicine, but also for midwives and veterinarians.
Browse through our range and find your very own model.
Tip: Instead of a name tag, you can have your stethoscope engraved by us!
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