Blood Flow Meter Wikipedia

A sphygmomanometer also known as a blood pressure monitor or blood pressure gauge is a device used to measure blood pressure composed of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner and a mercury or aneroid manometer to measure the pressure.

Blood flow meter wikipedia.

In the blood vessels the blood flow rate is maximum along the axis of the vessel and decreases with the square of the distance from the axis reaching zero at the wall of the vessel. A mass flow meter also known as an inertial flow meter is a device that measures mass flow rate of a fluid traveling through a tube. The mass flow rate is the mass of the fluid traveling past a fixed point per unit time. Turbulence is commonly observed in everyday phenomena such as surf fast flowing rivers billowing storm clouds or smoke from a chimney.

Wikipedia is a free online encyclopedia created and edited by volunteers around the world and hosted by the wikimedia foundation. Flow through a large penstock such as used at a hydroelectric power plant can be measured by averaging the flow velocity over the entire area. Electromagnetic blood flow meters measure blood flow in blood vessels consists of a probe conneected to a flow sensor box an electromagnetic flow met er is a device capable of measuring the mas s flow of a fluid. It measures the mass per unit time e g kilograms.

An ultrasonic flow meter is a type of flow meter that measures the velocity of a fluid with ultrasound to calculate volume flow. In fluid dynamics turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity it is in contrast to a laminar flow which occurs when a fluid flows in parallel layers with no disruption between those layers. Using ultrasonic transducers the flow meter can measure the average velocity along the path of an emitted beam of ultrasound by averaging the difference in measured transit time between the pulses of ultrasound propagating into and against the direction of the flow. The mass flow meter does not measure the volume per unit time e g cubic meters per second passing through the device.

In 1935 german physician karl matthes 1905 1962 developed the first two wavelength ear o 2 saturation meter with red and green filters later red and infrared filters. Propeller type current meters similar to the purely mechanical ekman current meter but now with electronic data acquisition can be traversed over the area of the penstock and velocities averaged to calculate total flow. His meter was the first device to measure o 2 saturation. The original oximeter was made by glenn allan millikan in the 1940s.

In 1949 wood added a pressure capsule to squeeze blood out of the ear so as to. Thus haemodynamics explains the physical laws that govern the flow of blood in the blood vessels.