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Use of Your Stethoscope


Your 3M™ Littmann® Stethoscope will give you many years of durable service, especially if you follow the care and maintenance tips listed below.

General Care
Your Littmann stethoscope is designed to provide years of reliable service. Routinely cleaning your stethoscope will ensure optimal acoustic performance. For more information, see Cleaning and Care.

Optimising Acoustic Performance
If your stethoscope’s acoustic performance appears to be lacking or absent, try one of following:

  • Proper Headset Alignment: Littmann stethoscopes have headsets which have been designed to be worn at an anatomically correct angle, oriented toward the user’s ear canals. Before placing the eartips in your ears, hold the stethoscope headset in front of you so that the eartubes point away from you (Figure A). When the eartips are in your ears, the eartips should be pointed forward (Figure B). Not everyone's ear canals are the same. If after inserting the eartips in proper manner, the fit does not seem comfortable, and acoustic performance does not improve, grasp each of the eartubes, adjusting the headset for a custom fit. Improperly wearing the stethoscope headset can result in poor acoustic seal, and in some cases, complete sound blockage (Figure C).
  • Proper Fit of Eartips: It is important that the proper sized eartips be used to achieve optimal acoustic performance. This is especially true when using the soft-sealing eartips. If the soft-sealing eartip is too large for the user, the compression of that eartip while in the ear, could result in poor acoustic performance. This could also be true if the eartip is too small. Finding the individual’s correct ear size results in the best acoustic performance.
  • Check for Obstructions: If the stethoscope is commonly carried in a pocket, or hasn't routinely been cleaned, it is possible that lint or dirt could be obstructing the sound pathway. Routine care and maintenance can prevent this from happening.
  • Check the Seal: Stethoscopes rely on an airtight seal in order to transmit body sounds from the patient to the user’s ear. Loose parts in the chestpiece, loose tubing, or cracked tubing can prevent an airtight seal.
  • Index the Bell: When using a double-sided stethoscope, the user needs to open, or index the bell or diaphragm by rotating the chestpiece. If the diaphragm is open, the bell will be closed, preventing sound from coming in through the bell, and vice versa.

If you are still unable to hear after trying the above suggestions, call the 3M Health Care Service Centre at +65 6450 8888 or Contact Us.

Proper Insertion
Figure A
Proper Insertion
Correct Positioning
Figure B
Correct Positioning
Incorrect Positioning
Figure C
Incorrect Positioning