What is actually listen by doctor using stethoscope?

The stethoscope is used to help the physician auscultate (listen to) flood flow sounds from major arteries -- typical locations are heart, chest, abdomen. They cannot pick up sounds from veins or capillaries. The purpose when used on the heart is to measure pulse, and from that they can tell if there are abnormalities in blood pressure, for instance. Doctors are trained to be able to distinguish variations in sounds from these locations. It is shown best in the video below:

Is there any device to detect turbulence flow within blood vessels? which is available on market.

Do you have any suggestions?
Thank you very much for any suggestions (^v^)

I believe blood flow turbulence is known to indicate diseased or obstructed arteries in people that develop or are born with faulty atrial valves. This leads to heart murmurs (a murmur is an unusual noise); heart murmurs occur due to the turbulent movement of blood moving through the heart valves and chambers. Normally, the blood flows from one chamber to the next and valves close tightly to prevent blood from flowing backwards.

There are two general types of valve disease. If the valve does not open properly, the forward flow is restricted. This is called stenosis. If the valve fails to close properly, backward flow is not prevented when the heart pumps. This is called regurgitation or insufficiency.

In either case, forward flow is reduced and symptoms such as breathlessness, weakness, dizziness and fainting can occur.

Normal heart valves



Stenotic valve disease



Regurgitation or insufficiency valve disease

The stethoscope is used to help the physician auscultate (listen to) flood flow sounds from major arteries, can they detect blood flow turbulence through the sounds as well? because turbulence flow also generate sounds.

Do you have any suggestions?
Thank you very much for any suggestions (^v^)

100% -- They will tell you from one listen if you have that condition.

Stethoscope seems the most suitable and affordable to monitor blood viscosity for turbulence flow.

Thank you very much for suggestions (^v^)

I think that's too general of a statement. Stethoscope doesn't just help a physician determine turbulence, but also used whenever a patient exhibits a respiratory infection. Doctors can use it auscultate any irregular breathing patterns, mucous, airflow through the lungs, etc. It also used in other applications, unrelated to blood flow.

Thank you very much for suggestions (^v^)