History of Blood Flow Measurement The first attempt to measure blood flow was by Chauveau, et al. in 1869. This was a mechanical device in which the moving blood was made to strike a mechanical linkage which moved in relation to the velocity of the blood. A variety of other mechanical devices were designed to measure blood flow in the late 1800's including the Stromuhr of Carl Ludwig and the di...

PURPOSE Nitrous oxide (N2O) administration with nasal mask produces variable outcomes in dental patients. This study describes a novel sampling method to measure actual inspired/expired N2O concentrations ([N2O]). METHODS Fifteen adult volunteers (32.5 +/- 8.5 years) underwent placement of a nasopharyngeal probe. With a nasal mask, 100% oxygen (O2) was administered for 2 minutes. N2O was intr...

Wearable wireless physiological sensors are helpful for monitoring and maintaining human health. Blood flow contains abundant physiological information but it is hard to measure blood flow during exercise using conventional blood flowmeters because of their size, weight, and use of optic fibers. To resolve these disadvantages, we previously developed a micro integrated laser Doppler blood flowm...

PURPOSE This study determined whether the portable Advance Laser Flowmeter Model 21, a clinical instrument, would indicate significant values when pulpal blood flow was present or absent; whether the analog output of the flowmeter was time-linked to the heart rate; and whether labial and lingual crown surfaces produced different flow values. METHODS Teeth were tested under two conditions: wit...

Coriolis flowmeters have been widely employed in a variety of industrial applications. There is potential that the measuring tube flowmeter may be eroded when it used to measure abrasive fluid such as slurry flow. However, challenging verify structural health without process interruptions or using on-site calibration devices meter provers. This article presents an situ health-monitoring techniq...

The purpose of this study was to construct a flowmeter that could accurately measure the hydraulic permeability of electrospun fibrinogen scaffolds, providing insight into the transport properties of electrospun scaffolds while making the measurement of their topographical features (fiber diameter and pore size) more accurate. Three different concentrations of fibrinogen were used (100, 120, an...

The article discusses modeling procedures to capture the physical and chemical processes present in operational measurement with a high-precision inductive flowmeter. In this context, theoretical model numerical solution are proposed. Exploiting combined finite element method (FEM) volume (FVM), we prepared models of multiple variants flowmeter computed output voltage on device's electrodes. jo...