The tunable diaphragm is a 3M invention that allows you to listen to both low and high frequency sounds without the need to remove the chestpiece from the patient, turn it over, and reposition it.
By varying the pressure placed on the patient, a tunable diaphragm will adjust, or tune, the sounds to allow you to hear either low or high frequencies. When holding the tunable diaphragm on a patient and pressing lightly, low frequency sounds will be transmitted. When using the tunable diaphragm and pressing firmly, higher frequency sounds will be emphasised.
This convenience will save you time and allow you to focus on your patient instead of trying to determine if you should be listening to the bell or diaphragm side of the chestpiece.
First, it’s very important to wear the stethoscope properly. All Littmann stethoscopes have headsets that are angled and are designed to fit properly with your ear canals. Here’s the correct orientation: Hold the stethoscope with the eartubes vertical. When placing the eartips in your ears, be sure that the angled eartubes are pointing forward, toward your nose.
Once the stethoscope is correctly oriented, adjust the sound amplification by pressing the "+" and "-" buttons on the keypad. Make sure that the very centre of the chestpiece is making good contact with the patient; this is the location of the sound sensor. If you still cannot hear any sound, contact 3M Littmann Technical Support by calling 136 136 or use the Contact Us form
For optimum wireless connection performance, it is important that the stethoscope chest piece and wireless dongle are in close proximity and that the path between them is free of any obstructions. Walls, furniture, and bodies will degrade the wireless signal.
The positioning of the stethoscope and wireless adapter is crucial to good wireless performance. In some cases, the use of a USB extension cable which elevates the adapter and/or changes its orientation can result in a marked improvement. 3M recommends using the StarTech Desktop USB Extension Cable, or similar device, that can be found online at many retailers or at your local electronics store.
During recording, it may help for the PC to be located next to the patient (rather than behind them) so that the patient's body does not block the signal path. Hold the chest piece firmly with fingertips (rather than a cupped hand) to allow the wireless antenna to function optimally. Minimize the distance between stethoscope and PC. Under typical conditions, a distance of 10 feet should be readily achievable.
Operating environment also plays a role in connection performance. Cordless phones, cellular phone accessories, microwave ovens, and computer Wi-Fi equipment may all degrade connection performance and should be considered if connection performance is less than desirable.
Before you can transfer data between two Bluetooth® devices, they must first be "paired" electronically. Pairing is a discovery and authentication process that allows your Bluetooth-equipped Littmann model 3200 stethoscope to communicate with another Bluetooth-equipped device, and establishes the link between these two devices as a trusted pair. While StethAssist can remember trusted pairing with up to eight different Bluetooth devices, it will only communicate with one paired device at a time. In addition, you cannot pair two Littmann model 3200 stethoscopes together.
Once paired, the Littmann model 3200 stethoscope can connect to the PC running StethAssist. Select the CONNECT option by pressing and releasing the (M) button. The LCD screen will signal that the Bluetooth link is active. The stethoscope will automatically return to operational status.