errors in blood pressure (bp) measurement are common in the clinical practice. inaccurate measurements of bp may lead to misdiagnosis and inappropriate treatment of hypertension. the preferred method of bp measurement in the clinical setting is a scultation, using the first and the fi fth korotkoff sounds. however, the use of mercury sphygmomanometer is declining. automated oscillometric device...

BACKGROUND Gut mucosal blood flow measurement is used to study a variety of disorders and possibly extrinsic neural function. AIMS To determine optimal measurement criteria and validate this technique as a measure of level of activity of extrinsic autonomic gut innervation. METHODS In 26 healthy volunteers a laser Doppler mucosal probe was applied 10 cm from the anus. Response to inhaled sa...

Blood flow is the volume of blood that passes through a particular point in the circulatory system. Measuring the blood flow is of prime importance because it not just plays a very crucial role in understanding the functionality of heart but also other organs. It is a reflection of the cardiac activity and greatly helps in monitoring the same. The proposed methodology of blood flow measurement ...

Impaired ocular blood flow is involved in the pathogenesis of numerous ocular diseases like glaucoma or AMD. The purpose of the present study was to introduce and validate a novel, microscope based, non-invasive Laser Doppler Flowmeter (NI-LDF) for measurement of blood flow in the choroid. The custom made NI-LDF was compared with a commercial fiber optic based laser Doppler flowmeter (Perimed P...

We develop and validate a Modified Beer-Lambert law for blood flow based on diffuse correlation spectroscopy (DCS) measurements. The new formulation enables blood flow monitoring from temporal intensity autocorrelation function data taken at single or multiple delay-times. Consequentially, the speed of the optical blood flow measurement can be substantially increased. The scheme facilitates blo...

Objective. Impedance measurement of cardiac output has struggled to become established partly because there have been only a few attempts to establish a sound theoretical basis for this measurement. Our objective is to demonstrate that there is valuable aortic flow information available from an intrathoracic impedance signal which may eventually be useful in the measurement of cardiac output by...

In order to evaluate the degree of arterial insufficiency, measurement of blood pressure, blood flow, flow velocity and waveform has been the focus of noninvasive diagnostic techniques. Noninvasive estimation of the degree of venous reflux has been an important problem, in place of invasive measurement of venous pressure. Although vascular imaging provides excellent informations about occlusive...

In this paper, we are going to introduce the new technique for measurement of blood flow rate in humans based on LDF (Laser Doppler Flowmetry) technique. We had developed overall embedded system which takes input from laser Doppler blood flow sensor & gives output on personal computer via wireless communication. The structure of the sensor consists of two compartments with a light dependant res...