BACKGROUND Intra-operative flow measurement during coronary or peripheral bypass operations is helpful for ruling out technical failures and for prediction of complication and patency rates. Preclinical validation of the flowmeters is required in order to rely on the intra-operatively measured results. The aim of this study is to evaluate a new "dual beam Doppler" blood flowmeter before clinica...

This paper introduces the composition and working principle of field service gas flow standard device based on meter. Through analysis uncertainty verification measurement results, it is confirmed that meter method can be applied to flowmeter.

A flowmeter is described which may be used to measure gas flow in experimental situations. It may be adapted for use with any gas or gas mixture and be used to provide flows as small as 50 ml min-1. A mercury-in-glass manometer (sphygmomanometer) is used to measure the gas pressure proximal to a flow restrictor (consisting of a hypodermic needle hub) and it is this pressure head which, for a gi...

Purpose To evaluate the retinal microcirculation using a segmental-scanning Doppler optical coherence tomography (DOCT) flowmeter in a patient with Takayasu's arteritis (TA) with aortic valve regurgitation (AR). Observations We measured the retinal blood velocity (V), retinal blood flow (RBF), and retinal blood velocity profiles (RBVP) of the major retinal arterioles using a DOCT flowmeter. T...

• Indicator dilution technics have been employed by Malooly and co-workers J for the in vivo calibration of electromagnetic flowmeter probes. In attempting to apply this calibration procedure to the measurement of pulmonary arterial flow in anesthetized dogs, we noted that the presence of the flowmeter probe on the pulmonary artery was frequently associated with abnormal indicator dilution curv...

The treatment of the hydrophobic properties solid surfaces is considered as a passive method to reduce drag in water flows (Rothstein, 2010) and potentially affect flow separation vortex shedding (Sooraj et al., 2020). manufacturing with micro- nano-scale roughness allows extend hydrophobicity towards superhydrophobicity contact angle close 180°. In such conditions surface not wetted completely...