On-line diagnosis of problems in drip infusion system by impedance and flow measurement

1988 ◽  
Author(s):  
S. Anand ◽  
S.K. Guha
Keyword(s):  
Flow Measurement ◽  
Drip Infusion ◽  
On Line ◽  
Infusion System

Urethrography in the male: The clamp method

2009 ◽  
Vol 50 (2) ◽  
pp. 233-237 ◽  
Author(s):  
J. D. Berná ◽  
J. D. Berná ◽  
M. Aparicio Meson
Keyword(s):  
Pain Intensity ◽  
Conventional Method ◽  
Gold Standard ◽  
Analog Scale ◽  
External Compression ◽  
Drip Infusion ◽  
Retrograde Urethrography ◽  
Posterior Urethra ◽  
The Mean ◽  
Infusion System

Background: Retrograde urethrography is considered the gold standard for evaluating stenosis or urethral disease. Purpose: To describe the clamp method for optimizing retrograde urethrography (RUG) using a perfected device and a drip infusion system. Material andMethods: RUG was performed in 42 patients with a mean age of 63.4±16.5 years suspected of having urethral stenosis. The modifications to the device are shown, and the steps of the technique described. The intensity of pain from both catheterization and external compression was measured on a visual analog scale (VAS). Results: All the RUG examinations were conducted satisfactorily. The use of the drip infusion system enabled visualization of the posterior urethra in 97.6% of cases, and bladder repletion was achieved in 95.2% of cases. The urethrograms revealed images of stenosis in 31 patients. With catheterization the mean pain intensity registered by VAS was 0.7±0.6 (SD), whereas with external compression the mean pain intensity was 0.06±0.02 (SD). Conclusion: The clamp method and drip infusion system used in this study are efficient and reduce patient discomfort. The procedure makes it possible to assess cases with stenosis close to the meatus that are difficult to manage with the conventional method.

Development and evaluation of a glucose analyzer for a glucose controlled insulin infusion system ((Biostator).

1978 ◽  
Vol 24 (8) ◽  
pp. 1366-1372 ◽  
Author(s):  
E J Fogt ◽  
L M Dodd ◽  
E M Jenning ◽  
A H Clemens
Keyword(s):  
Blood Glucose ◽  
Whole Blood ◽  
Insulin Infusion ◽  
Full Range ◽  
Dynamic Control ◽  
On Line ◽  
The Moment ◽  
Glucose 6 Phosphate Dehydrogenase ◽  
Blood Glucose Concentrations ◽  
Infusion System

Abstract The Glucose-Controlled Insulin Infusion System (Biostator) is a modular, computerized, feedback control system for dynamic control of blood glucose concentrations in diabetics. This on-line glucose analyzer for use with whole blood utilizes a novel enzyme (glucose oxidase)-membrane configuration and an electrochemical cell to measure the H202 generated. The analyzer exhibits both short- and long-range stability, and instrument response and analyte concentration are linearly related over the full range of clinical interest. The response is fast, accurate, and precise, and permits determination of blood glucose within 2 min from the moment the blood leaves the patient. Correlation studies were completed to show the agreement between the Biostator Glucose Analyzer and the FDA's recommended hexokinase/glucose-6-phosphate dehydrogenase procedure on whole blood (e.g., average per cent recovered for 11 concentrations between 250 and 900 mg/liter was: hexokinase, 95.6%, Biostator Analyzer, 95.9%; bias and SDd, respectively, at low, normal, and high glucose values were: 12 and 41 mg/liter at the 500 mg/liter level; 4 and 52 mg/liter at the 1000 mg/liter level, and 4 and 128 mg/liter at the 4000 mg/liter level). No appreciable interference is observed with above-normal concentrations of bilirubin, uric acid, creatinine, sodium salicylate, or dextran. Platelet adhesion, which tends to decrease the useful life of the membrane, has been significantly decreased.

Thermodilution versus saline dilution method for vascular access blood flow measurement in high-flux and on-line hemodiafiltration

2012 ◽  
pp. 0-0
Author(s):  
Néstor Fontseré ◽  
Francisco Maduell ◽  
Miquel Blasco ◽  
Manel Vera ◽  
Marta Arias ◽  
...  
Keyword(s):  
Blood Flow ◽  
Vascular Access ◽  
Flow Measurement ◽  
Dilution Method ◽  
High Flux ◽  
Blood Flow Measurement ◽  
On Line

Software sensors based on the grey-box modelling approach

1996 ◽  
Vol 33 (1) ◽  
pp. 117-126 ◽  
Author(s):  
Jacob Carstensen ◽  
Poul Harremoës ◽  
Rune Strube
Keyword(s):  
Flow Measurement ◽  
Box Model ◽  
Aeration Tank ◽  
Specific System ◽  
Level Measurement ◽  
Box Models ◽  
Software Sensors ◽  
On Line ◽  
Level Transmitter ◽  
Modelling Approach

In recent years the grey-box modelling approach has been applied to wastewater transportation and treatment. Grey-box models are characterized by the combination of deterministic and stochastic terms to form a model where all the parameters are statistically identifiable from the on-line measurements. With respect to the development of software sensors, the grey-box models possess two important features. Firstly, the on-line measurements can be filtered according to the grey-box model in order to remove noise deriving from the measuring equipment and controlling devices. Secondly, the grey-box models may contain terms which can be estimated on-line by use of the models and measurements. In this paper, it is demonstrated that many storage basins in sewer systems can be used as an on-line flow measurement, provided that the basin is monitored on-line with a level transmitter and that a grey-box model for the specific dynamics is identified. Similarly, an on-line software sensor for detecting the occurrence of backwater phenomena can be developed by comparing the dynamics of a flow measurement with a nearby level measurement. For treatment plants it is found that grey-box models applied to on-line ammonia measurements from the aeration tank of an alternating plant provide information on the incoming ammonia load. It is also shown how measurements of the return sludge concentration from a secondary clarifier can be filtered to minimize the effect of the scraper. Thus, important information can be derived from on-line measurements if the appropriate grey-box model for the specific system is identified.

An On-line Automatic Flow Measurement Method for an Open Channel under Complex Flow Conditions

2016 ◽  
Vol 9 (7) ◽  
pp. 353-364
Author(s):  
Tanghuai Fan ◽  
Jie Shen ◽  
Guofang Lv ◽  
Jiahua Zhang ◽  
Xijun Yan
Keyword(s):  
Flow Measurement ◽  
Measurement Method ◽  
Open Channel ◽  
Flow Conditions ◽  
Complex Flow ◽  
On Line

The potential of on-line optical flow measurement in the control and monitoring of pilot-scale oxy-coal flames

2014 ◽  
Vol 55 (5) ◽  
Author(s):  
Pal Toth ◽  
Zhonghua Zhan ◽  
Zhisong Fu ◽  
Arpad B. Palotas ◽  
Eric G. Eddings ◽  
...  
Keyword(s):  
Optical Flow ◽  
Flow Measurement ◽  
Pilot Scale ◽  
On Line

Soot Mass Flow Measurement System Using Triboelectricity and Ultrasonic

2011 ◽  
Vol 383-390 ◽  
pp. 5304-5308
Author(s):  
Yan Jun Zhao ◽  
Xuan Zhao ◽  
Shu Sheng Yue
Keyword(s):  
Numerical Simulation ◽  
Mass Flow ◽  
Measurement System ◽  
Flow Measurement ◽  
Ultrasonic Method ◽  
Gas Velocity ◽  
Electrostatic Induction ◽  
Soot Mass ◽  
On Line ◽  
Line Measure

A new method, triboelectricity and ultrasonic, for the soot mass flow measurement is developed. The direct rod-shaped sensor is used to measuring the triboelectricity charge and the ring sensor is used to measuring the electrostatic induction charge. The pure-triboelectricity can be figured out and the pure-triboelectricity is eliminated the influence of the electrostatic induction. Through the numerical simulation, the proportion between the electrostatic induction charge and the electrostatic induction charge is presented. The gas flowrate is measured by the ultrasonic. The soot mass flow can be figured out through the pure-triboelectricity and the gas velocity. Additionally, the sample calibration equipment based on the pure-triboelectricity and ultrasonic method is also introduced. Experimental results show the method can on-line measure the soot mass flow.

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