Which observation tool allows doctors to monitor blood circulation in real time

An Ultrasound is the observation tool which allows doctors to monitor blood circulation in real time.

Explanation:

The person who perform ultrasound test is known as sonographer, but for further interpretation the radiologist, cardiologist or specialists are preferred. Ultrasound Doppler can measure blood flow in a vessel or blood pressure. This will assess blood flow rate and any blockages.  One instance of Doppler ultrasound is an echocardiogram (ECG). This can be applied to construct cardiovascular device pictures, and at different points to assess blood flow and cardiac tissue motion. The ultrasound from Doppler can determine the purpose and condition of cardiac valve regions, any heart defects, valvular regurgitation, or blood leakage from valves, and it can demonstrate how better heart pumps out blood.The ultrasonic flow meter is a diagnostic tool capable of approximating the rate of blood flow in a given vessel. The ultrasonic flow meter transducer contains both a transmitter element and a receiver element. The transmitter emits ultrasonic waves of a fixed frequency, which are then transmitted by the traveling red blood cells (RBCs) with whom they come into contact.