1,382 results match your criteria Peak Flow Rate Measurement


Transcranial Impedance Changes during Sleep: A Rheoencephalography Study.

IEEE J Transl Eng Health Med 2019 11;7:2700107. Epub 2019 Feb 11.

United Neuroscience Inc.DublinIreland.

Objective: To demonstrate the utility of rheoencephalography (REG) for measuring cerebral blood flow and fluid dynamics during different stages of sleep.

Methods: Anteroposterior cranial electrical impedance was measured with concurrent polysomnography in a group of healthy subjects during sleep. Transcranial electrical impedance was characterized by measuring the peak-to-trough and envelope of the filtered pulsative REG signal as well as its frequency. Read More

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http://dx.doi.org/10.1109/JTEHM.2019.2898193DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6404797PMC
February 2019
1 Read

Color Doppler imaging of ocular hemodynamic changes in patients with rheumatoid arthritis unrelated to disease activity.

Rheumatol Int 2019 Mar 12. Epub 2019 Mar 12.

Department of Ophthalmology, Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey.

We aimed to investigate how orbital blood flow rates in patients with rheumatoid arthritis (RA) are affected by the active and remission phase of the disease. This prospective study included a total of 56 patients with RA (study group) and 24 control individuals (control group). All RA patients were divided into two groups, as active (Group 1) and remission (Group 2) according to the disease activity index (DAS 28) score. Read More

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http://dx.doi.org/10.1007/s00296-019-04275-yDOI Listing
March 2019
2 Reads

Phantom Validation of DCE-MRI Magnitude and Phase-Based Vascular Input Function Measurements.

Tomography 2019 Mar;5(1):77-89

TECHNA Institute, University Health Network, Toronto, ON, Canada.

Accurate, patient-specific measurement of arterial input functions (AIF) may improve model-based analysis of vascular permeability. This study investigated factors affecting AIF measurements from magnetic resonance imaging (MRI) magnitude (AIF) and phase (AIF) signals, and compared them against computed tomography (CT) (AIF), under controlled conditions relevant to clinical protocols using a multimodality flow phantom. The flow phantom was applied at flip angles of 20° and 30°, flow rates (3-7. Read More

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http://dx.doi.org/10.18383/j.tom.2019.00001DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6403037PMC
March 2019
2 Reads

Study of some pulmonary function tests in Egyptian children with end-stage renal disease under regular hemodialysis in correlation with dialysis duration.

Saudi J Kidney Dis Transpl 2019 Jan-Feb;30(1):119-128

Department of Pediatrics, Faculty of Medicine, Tanta University, Tanta City, Gharbia Governate, Egypt.

Pulmonary function tests can differentiate between obstructive and restrictive lung diseases and assess the severity of the disease in children. The aim of work was to study pulmonary function tests in children with end-stage renal disease (ESRD) undergoing hemodialysis (HD) and its correlation with dialysis duration. This study was conducted on 40 patients with ESRD on regular HD for at least six months selected from the Pediatric Nephrology unit of Pediatric Department of Tanta university hospital and 40 healthy children as a control group. Read More

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February 2019
1 Read

Evaluation of resistive index of the prostate and bladder sonomorphologic parameters as replacements for urodynamics to predict bladder outlet obstruction in patients with lower urinary tract symptoms suggestive of benign prostatic hyperplasia.

Low Urin Tract Symptoms 2019 Feb 22. Epub 2019 Feb 22.

Department of Radiodiagnosis, King George's Medical University, Lucknow, India.

Objective: This study investigated whether the resistive index (RI) of prostate and bladder sonomorphologic parameters (total prostate volume [TPV], detrusor wall thickness [DWT], intraprostatic protrusion [IPP]) can be used instead of urodynamic studies (UDS) to predict bladder outlet obstruction (BOO) in benign prostatic hyperplasia (BPH) with lower urinary tract symptoms (LUTS).

Methods: Men aged ≥50 years with clinical BPH/LUTS were prospectively enrolled included. Basic evaluations, measurement of sonomorphologic parameters, and UDS were performed in accordance with the International Continence Society's Good Urodynamics Practices protocol. Read More

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http://dx.doi.org/10.1111/luts.12256DOI Listing
February 2019
1 Read

Validation of the disposable T-piece resuscitator (Neo-Tee): a bench study.

Arch Dis Child Fetal Neonatal Ed 2019 Feb 19. Epub 2019 Feb 19.

Department of Neonatology, Emma Children's Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.

Objective: The Neo-Tee Infant T-piece resuscitator is a disposable T-piece resuscitator. The aim of this bench study was to assess the accuracy of the Neo-Tee using a measurement set-up and settings mimicking clinical practice.

Study Design: Nine Neo-Tee devices were tested using a face mask interface and a manikin. Read More

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http://dx.doi.org/10.1136/archdischild-2018-315298DOI Listing
February 2019
5 Reads

Aortic Pulsatility Propagates Intracranially and Correlates with Dilated Perivascular Spaces and Small Vessel Compliance.

J Stroke Cerebrovasc Dis 2019 Feb 12. Epub 2019 Feb 12.

Salford Royal NHS Foundation Trust, Salford, United Kingdom; Wolfson Molecular Imaging Centre, School of Medicine, University of Manchester, Greater Manchester, United Kingdom.

Introduction: To test the hypotheses that changes in the aortic pulse-wave produced by arterial stiffening are (1) propagated into cerebral small vessels, (2) associated with reduced compliance of small cerebral arterial vessels, and (3) associated with the presence of dilated perivascular spaces (PVS).

Methods: Fifteen volunteers and 19 patients with late-onset depression (LOD) were prospectively recruited, of which 6 fulfilled the criteria for treatment-resistant depression (TRD). Aortic pulse-wave velocity (PWV) was determined using Carotid-Femoral Doppler. Read More

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http://dx.doi.org/10.1016/j.jstrokecerebrovasdis.2019.01.020DOI Listing
February 2019
1 Read

A simple method of transport parameter estimation for slug injecting tracer tests in porous media.

Sci Total Environ 2018 Dec 13;644:1536-1546. Epub 2018 Jul 13.

Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, PR China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, PR China.

Slug (instantaneous injection) tracer tests can be used effectively to determinate solute transport parameters in porous media such as pore velocities and dispersivities, which are usually estimated with curve-fitting methods. This study proposes a simple method to estimate conservative and reactive solute transport parameters in one-, two- and three- dimensional domains with uniform flow fields based on peak times of slug tracer tests. This method requires fewer measured data than traditional curve-fitting methods. Read More

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http://dx.doi.org/10.1016/j.scitotenv.2018.06.330DOI Listing
December 2018
1 Read

Impact of frit dispersion on gradient performance in high-throughput liquid chromatography.

J Chromatogr A 2019 Jan 11. Epub 2019 Jan 11.

Waters Corporation, 34 Maple Street, Milford, MA 01757, USA.

The impact of porous frits (2.1 mm i.d. Read More

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http://dx.doi.org/10.1016/j.chroma.2019.01.021DOI Listing
January 2019
1 Read

Determination of a astragaloside IV derivative LS-102 in plasma by ultra-performance liquid chromatography-tandem mass spectrometry in dog plasma and its application in a pharmacokinetic study.

Phytomedicine 2019 Feb 5;53:243-251. Epub 2018 Sep 5.

Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China. Electronic address:

Background: Astragalosidic acid (LS-102) is a new water-soluble derivative of astragaloside IV - a major effective component isolated from the Chinese herb Astragali Radix. Our previous study showed that LS-102 exhibited potent cardiovascular activity.

Purpose: The objective of this study was to investigate the pharmacokinetic properties of LS-102 after single-dose, oral administration in beagle dogs by developing and validating an ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S09447113183030
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http://dx.doi.org/10.1016/j.phymed.2018.09.019DOI Listing
February 2019
7 Reads
3.126 Impact Factor

Pulse sequence considerations for quantification of pyruvate-to-lactate conversion k in hyperpolarized C imaging.

NMR Biomed 2019 Mar 21;32(3):e4052. Epub 2019 Jan 21.

Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA.

Hyperpolarized C MRI takes advantage of the unprecedented 50 000-fold signal-to-noise ratio enhancement to interrogate cancer metabolism in patients and animals. It can measure the pyruvate-to-lactate conversion rate, k , a metabolic biomarker of cancer aggressiveness and progression. Therefore, it is crucial to evaluate k reliably. Read More

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http://dx.doi.org/10.1002/nbm.4052DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6380928PMC
March 2019
4 Reads

The influence of posture on parasternal intercostal muscle activity in healthy young adults.

Physiol Meas 2019 Feb 1;40(1):01NT03. Epub 2019 Feb 1.

Centre for Human & Applied Physiological Sciences, School of Basic & Medical Biosciences, King's College London, London, United Kingdom. Equal contribution to the study.

Objective: Parasternal intercostal muscle electromyography (EMGpara) has been used as an index of respiratory load in health and disease. While reference values are available, such data have been obtained with subjects in the seated position only. The objective of the current study was to determine the influence of posture on measurements of EMGpara. Read More

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http://dx.doi.org/10.1088/1361-6579/aafefdDOI Listing
February 2019
6 Reads

Hantzsch pre-column derivatization for simultaneous determination of alendronate sodium and its pharmacopoeial related impurity: Comparative study with synchronous fluorometry using fluorescamine.

J Food Drug Anal 2019 Jan 18;27(1):208-220. Epub 2018 Jun 18.

Faculty of Pharmacy, Department of Pharmaceutical Analytical Chemistry, University of Alexandria - El-Messalah, Alexandria 2152, Egypt. Electronic address:

High performance liquid chromatographic (HPLC) method with a pre-column derivatization based on Hantzsch condensation reaction was applied for simultaneous determination of alendronate sodium (ALN) and its main related impurity, 4-Aminobutanoic acid (ABA) at its pharmacopeial limit. The separation of colored condensation products of ALN and ABA were achieved on Agilent Zobrax Eclipse SB-C18 analytical column (250 × 4.6 mm, 5 μm) using a mobile phase composed of acetonitrile-0. Read More

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http://dx.doi.org/10.1016/j.jfda.2018.05.009DOI Listing
January 2019
2 Reads
0.395 Impact Factor

Performance characteristics of the digital Biograph Vision PET/CT system.

J Nucl Med 2019 Jan 10. Epub 2019 Jan 10.

University Medical Center Groningen, Netherlands.

This study evaluates the performance of the Siemens Biograph Vision digital PET/CT system (Siemens Healthineers, Knoxville, USA) according to the NEMA NU 2-2012 standard (published by the National Electrical Manufacturers Association (NEMA)) to allow for a reliable, reproducible, and inter-system comparable performance measurement. The new digital PET/CT features silicon photomultiplier (SiPM)-based detectors with 3.2 mm lutetium oxyorthosilicate (LSO) crystals and full coverage of the scintillator area. Read More

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http://jnm.snmjournals.org/lookup/doi/10.2967/jnumed.118.215
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http://dx.doi.org/10.2967/jnumed.118.215418DOI Listing
January 2019
27 Reads

Growth of perovskite nanocrystals in poly-tetra fluoroethylene based microsystem: on-line and off-line measurements.

Nanotechnology 2019 Apr 10;30(14):145602. Epub 2019 Jan 10.

Key Laboratory of Pressure Systems and Safety (MOE), School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China.

Cesium lead halide perovskite nanocrystals are photoelectric nanomaterials that have potential applications in a variety of areas due to their excellent photoelectric and tunable photo luminescent properties. In this work, we investigate the synergetic effects of reaction temperature, reaction-capillary length and flow rate on the growth kinetics of perovskite nanocrystals in a PTFE-based microsystem and the photoluminescence characteristics of the perovskite nanocrystals both on-line and off-line. The on-line measurement finds that increasing the reaction temperature leads to the increase of the wavelength of the PL emission peak of the synthesized nanocrystals and reduces the average size of the perovskite nanocrystals synthesized in long reaction-capillaries. Read More

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http://iopscience.iop.org/article/10.1088/1361-6528/aafd3b
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http://dx.doi.org/10.1088/1361-6528/aafd3bDOI Listing
April 2019
7 Reads

The impact of lung function case-finding tests on smoking behaviour: A nested randomised trial within a case-finding cohort.

Health Sci Rep 2018 Jun 18;1(6):e41. Epub 2018 May 18.

Institute of Health and Society Newcastle University Newcastle upon Tyne UK.

Rationale Aims And Objectives: Increasing awareness of people's lung health through the use of lung function tests or symptom-based questionnaires is a potential method to aid smoking cessation. We investigated the impact of case-finding lung function tests for chronic obstructive pulmonary disease on smoking behaviour.

Methods: Our trial used a novel waiting list randomised controlled trial design, nested within a case-finding cohort study. Read More

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http://doi.wiley.com/10.1002/hsr2.41
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http://dx.doi.org/10.1002/hsr2.41DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6266471PMC
June 2018
7 Reads

Vortex Whistle and Smart Phone Application for Peak Flow Recordings in Asthmatic Children: A Feasibility Study.

Telemed J E Health 2018 Dec 20. Epub 2018 Dec 20.

1 Department of Pediatrics, Stavanger University Hospital, Stavanger, Norway.

Introduction: Variable airflow obstruction that can be confirmed by diurnal variability of peak expiratory flow (PEF) >13% is an important characteristic of asthma. Home monitoring of PEF may be helpful to diagnose and monitor asthma. In this feasibility study, we aimed to study if asthmatic children can measure PEF at home twice daily during a 4-week period using a device designed as a "whistle" and a smart phone software application. Read More

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https://www.liebertpub.com/doi/10.1089/tmj.2018.0270
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http://dx.doi.org/10.1089/tmj.2018.0270DOI Listing
December 2018
3 Reads

Design and Implementation of Respiration Rate Measurement System Using an Information Filter on an Embedded Device.

Sensors (Basel) 2018 Nov 30;18(12). Epub 2018 Nov 30.

Robotics Group, Korea Institute of Industrial Technology, Gyeonggi-do, Ansan-si 15588, Korea.

In this work, an algorithm was developed to measure respiration rate for an embedded device that can be used by a field robot for relief operations. With this algorithm, the rate measurement was calculated based on direct influences of respiratory-induced intensity variation (RIIV) on blood flow in cardiovascular pathways. For this, a photoplethysmogram (PPG) sensor was used to determine changes in heartbeat frequencies. Read More

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http://dx.doi.org/10.3390/s18124208DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6308642PMC
November 2018
7 Reads

Leachate generation rate modeling using artificial intelligence algorithms aided by input optimization method for an MSW landfill.

Environ Sci Pollut Res Int 2019 Feb 3;26(4):3368-3381. Epub 2018 Dec 3.

Civil Engineering Department, University of Malaya, 50603, Kuala Lumpur, Malaysia.

Leachate is one of the main surface water pollution sources in Selangor State (SS), Malaysia. The prediction of leachate amounts is elementary in sustainable waste management and leachate treatment processes, before discharging to surrounding environment. In developing countries, the accurate evaluation of leachate generation rates has often considered a challenge due to the lack of reliable data and high measurement costs. Read More

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http://link.springer.com/10.1007/s11356-018-3749-5
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http://dx.doi.org/10.1007/s11356-018-3749-5DOI Listing
February 2019
3 Reads

Study of the column efficiency using gradient elution based on Van Deemter plots.

J Chromatogr A 2019 Jan 22;1584:126-134. Epub 2018 Nov 22.

Departament de Química Analítica, Universitat de València, c/Dr. Moliner 50, 46100 Burjassot, Spain.

Performance of chromatographic columns is of major importance in the development of more efficient separation methods. So far, a common practice is to study the column behavior in isocratic elution by modifying the flow rate and fitting the theoretical plate height values versus the mobile phase linear velocity, according to the Van Deemter equation. In this work, an approach is presented to extend the measurement of efficiency to linear gradient elution, where the mean retention factor is kept constant at each assayed flow. Read More

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http://dx.doi.org/10.1016/j.chroma.2018.11.042DOI Listing
January 2019
1 Read

Assessment of Respiratory Symptoms and Pulmonary Function Status among Workers of Flour Mills in Addis Ababa, Ethiopia: Comparative Cross-Sectional Study.

Pulm Med 2018 24;2018:9521297. Epub 2018 Oct 24.

Addis Ababa University College of Medicine and Health Sciences, Department of Physiology, Addis Ababa, Ethiopia.

Background: Flour dust in the respiratory tract affects lung function. Flour dust is a heterogeneous organic substance which can have a tendency to cause respiratory ailments. There is growing consensus on the deleterious effects of flour dust on respiratory symptoms and lung performance of flour mill workers. Read More

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http://dx.doi.org/10.1155/2018/9521297DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6220375PMC
January 2019
5 Reads

Temperature of water ingested before exercise alters the onset of physiological heat loss responses.

Am J Physiol Regul Integr Comp Physiol 2019 Jan 7;316(1):R13-R20. Epub 2018 Nov 7.

Thermal Ergonomics Laboratory, Exercise and Sport Science, Faculty of Health Sciences, University of Sydney , Sydney, New South Wales , Australia.

This study sought to determine whether the temperature of water ingested before exercise alters the onset threshold and subsequent thermosensitivity of local vasomotor and sudomotor responses after exercise begins. Twenty men [24 (SD 4) yr of age, 75.8 (SD 8. Read More

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https://www.physiology.org/doi/10.1152/ajpregu.00028.2018
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http://dx.doi.org/10.1152/ajpregu.00028.2018DOI Listing
January 2019
13 Reads

Industrial radiotracer application in flow rate measurement and flowmeter calibration using Tc and Au nanoparticles radioisotope.

Appl Radiat Isot 2019 Jan 12;143:24-28. Epub 2018 Oct 12.

Plant Assessment Technology Group, Malaysian Nuclear Agency, 43000 Kajang, Malaysia. Electronic address:

The flow rate or fluid velocity measurement is important to maintain fluid flow quality performance in the systems. This study focuses on determination of volumetric flow rate measurement and to calibrate the conventional flowmeter using industrial radiotracer approach in quadrilateral gas-liquid bubble column reactor. In this work, two different radioisotopes which emit γ-ray have been chosen as radioactive tracer which is Tc produced from Mo/Tc radioisotope generator and Au nanoparticle form neutron activation at research nuclear reactor TRIGA Mark II. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S09698043173148
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http://dx.doi.org/10.1016/j.apradiso.2018.10.008DOI Listing
January 2019
16 Reads

End tidal carbon dioxide monitoring in acute asthma: a prospective pilot study in emergency department patients.

Eur J Emerg Med 2018 Oct 22. Epub 2018 Oct 22.

Emergency Department Lariboisière Hospital, AP-HP, 2 rue Ambroise Paré, Paris, University Paris VII René Diderot.

Background: The peak expiratory flow rate (PEFR) is the gold standard for monitoring asthmatic patients. However, its measurement requires understanding and active participation. End tidal carbon dioxide (EtCO2) may be considered an accurate surrogate for PaCO2, a severity marker in acute asthma. Read More

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http://dx.doi.org/10.1097/MEJ.0000000000000581DOI Listing
October 2018
3 Reads

Health hazards and risks for musculoskeletal problems among child labourers in the brickfield sector of West Bengal, India.

Authors:
Banibrata Das

Int Health 2018 Oct 17. Epub 2018 Oct 17.

Department of Physiology, South Calcutta Girls' College, University of Calcutta, Kolkata, India.

Aims: The purpose of this study was to describe the health hazards among child labourers in brickfields, and to assess occupational health problems, together with physiological and respiratory stress, compared with child control subjects.

Methods: A cross-sectional study was conducted on 112 child brickfield workers and 120 control subjects, and a modified Nordic Questionnaire was applied to assess the discomfort felt among both groups of workers. Physiological assessment of the workload was carried out by the measurement of heart rate, blood pressure and spirometry of the workers. Read More

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https://academic.oup.com/inthealth/advance-article/doi/10.10
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http://dx.doi.org/10.1093/inthealth/ihy071DOI Listing
October 2018
4 Reads
1.797 Impact Factor

Inter-Laboratory Characterization of the Velocity Field in the FDA Blood Pump Model Using Particle Image Velocimetry (PIV).

Cardiovasc Eng Technol 2018 Dec 5;9(4):623-640. Epub 2018 Oct 5.

Food & Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, USA.

Purpose: A credible computational fluid dynamics (CFD) model can play a meaningful role in evaluating the safety and performance of medical devices. A key step towards establishing model credibility is to first validate CFD models with benchmark experimental datasets to minimize model-form errors before applying the credibility assessment process to more complex medical devices. However, validation studies to establish benchmark datasets can be cost prohibitive and difficult to perform. Read More

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http://link.springer.com/10.1007/s13239-018-00378-y
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http://dx.doi.org/10.1007/s13239-018-00378-yDOI Listing
December 2018
28 Reads

The use of 5% lidocaine medicated plaster for acute postoperative pain after gynecological surgery: A pilot randomized controlled feasibility trial.

Medicine (Baltimore) 2018 Sep;97(39):e12582

Department of Anaesthesia and Intensive Care, Prince of Wales Hospital.

Objectives: To examine the feasibility and potential efficacy of 5% lidocaine medicated plaster for acute postoperative pain in a parallel, blinded, randomized controlled pilot trial.

Methods: Twenty-eight women undergoing elective gynecological surgery with midline incisions were randomly allocated 5% lidocaine medicated patch (Lignopad) or placebo plasters. Postoperative pain at rest and on movement at 24 hours were the primary study endpoints, with secondary endpoints of postoperative pain within the first 48 hours, cumulative morphine consumption (mg), predicted peak flow rate (PFR) (%) and adverse effects. Read More

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http://Insights.ovid.com/crossref?an=00005792-201809280-0009
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http://dx.doi.org/10.1097/MD.0000000000012582DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6181576PMC
September 2018
20 Reads

The application of commercially available mobile cigarette topography devices for e-cigarette vaping behavior measurements.

Nicotine Tob Res 2018 Sep 12. Epub 2018 Sep 12.

University of Maryland, College Park, MD, USA.

Introduction: The ability to reliably measure real-world vaping behavior is critical to understand exposures to potential toxins. Commercially available mobile topography devices were originally designed to measure cigarette puffing behavior. Information regarding how applicable these devices are to the measurement of e-cigarette vaping topography is needed. Read More

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http://dx.doi.org/10.1093/ntr/nty190DOI Listing
September 2018
3 Reads

Biventricular morphology in adults born with a ventricular septal defect.

Cardiol Young 2018 Dec 30;28(12):1379-1385. Epub 2018 Aug 30.

1Department of Cardiothoracic and Vascular Surgery,Aarhus University Hospital,Aarhus,Denmark.

Ventricular septal defects - large, surgically closed or small, untreated - have demonstrated lower peak exercise capacity compared with healthy controls. The mechanisms behind these findings are not yet fully understood. Therefore, we evaluated biventricular morphology in adults with a ventricular septal defect using MRI. Read More

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http://dx.doi.org/10.1017/S1047951118001361DOI Listing
December 2018
18 Reads

First trimester ductus venosus velocity ratios as a marker for major cardiac defects.

Ultrasound Obstet Gynecol 2018 Aug 20. Epub 2018 Aug 20.

Department of Obstetrics and Gynaecology, University of Tuebingen, Germany.

Objective: To examine the DV flow in fetuses with and without a cardiac defect. In addition to the standard assessment of the DV PIV and the a-wave, we evaluated different phases of the DV flow.

Methods: Retrospective study including singleton pregnancies that underwent first trimester screening, which included DV flow assessment. Read More

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http://dx.doi.org/10.1002/uog.20099DOI Listing
August 2018
10 Reads

Aptamer-functionalized AuNPs for the high-sensitivity colorimetric detection of melamine in milk samples.

PLoS One 2018 2;13(8):e0201626. Epub 2018 Aug 2.

College of Life Sciences, Henan Agricultural University, Zhengzhou, China.

Although aptamer-functionalized AuNPs technology exhibits great potential in analytical and biological chemistry, direct analysis of molecules at a low concentration using colorimetric assay remains challenging. The development of intuitive methods has attracted interest for promising detection of melamine in milk samples due to a demand for stable and understandable process. In this study, we propose a rapid and facile colorimetric measurement method of melamine combined aptamer-functionalized AuNPs in contaminated milk samples. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0201626PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6072046PMC
January 2019
4 Reads

Estimation of Cough Peak Flow Using Cough Sounds.

Sensors (Basel) 2018 Jul 22;18(7). Epub 2018 Jul 22.

Department of System Cybernetics, Institute of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan.

Cough peak flow (CPF) is a measurement for evaluating the risk of cough dysfunction and can be measured using various devices, such as spirometers. However, complex device setup and the face mask required to be firmly attached to the mouth impose burdens on both patients and their caregivers. Therefore, this study develops a novel cough strength evaluation method using cough sounds. Read More

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http://dx.doi.org/10.3390/s18072381DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6068958PMC
July 2018
4 Reads

High-Frame-Rate Contrast-enhanced US Particle Image Velocimetry in the Abdominal Aorta: First Human Results.

Radiology 2018 Oct 17;289(1):119-125. Epub 2018 Jul 17.

From the Department of Vascular Surgery, Rijnstate Hospital, Wagnerlaan 55, 6815 AD Arnhem, the Netherlands (S.E., M.M.P.J.R., E.G.J.); Department of Biomedical Engineering, Thorax Center ( J.V., H.J.V., F.J.H.G., N.d.J., J.G.B.), and Department of Gastroenterology and Hepatology (P.T.), Erasmus Medical Center, Rotterdam, the Netherlands; Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands ( J.J.M.W.); Physics of Fluids Group, Technical Medical ( TechMed ) Centre, University of Twente, Enschede, the Netherlands (M.V., E.G.J.); and Department of Imaging Physics, Faculty of Applied Sciences, Delft University of Technology, Delft, the Netherlands (N.d.J.).

Purpose To study the feasibility of high-frame-rate (HFR) contrast material-enhanced (CE) ultrasound particle image velocimetry (PIV), or echo PIV, in the abdominal aorta. Materials and Methods Fifteen healthy participants (six men; median age, 23 years [age range, 18-34 years]; median body mass index, 20.3 kg/m [range, 17. Read More

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http://dx.doi.org/10.1148/radiol.2018172979DOI Listing
October 2018
4 Reads

3-D Velocity and Volume Flow Measurement In Vivo Using Speckle Decorrelation and 2-D High-Frame-Rate Contrast-Enhanced Ultrasound.

IEEE Trans Ultrason Ferroelectr Freq Control 2018 Dec 27;65(12):2233-2244. Epub 2018 Jun 27.

Being able to measure 3-D flow velocity and volumetric flow rate effectively in the cardiovascular system is valuable but remains a significant challenge in both clinical practice and research. Currently, there has not been an effective and practical solution to the measurement of volume flow using ultrasound imaging systems due to challenges in existing 3-D imaging techniques and high system cost. In this study, a new technique for quantifying volumetric flow rate from the cross-sectional imaging plane of the blood vessel was developed by using speckle decorrelation (SDC), 2-D high-frame-rate imaging with a standard 1-D array transducer, microbubble contrast agents, and ultrasound imaging velocimetry (UIV). Read More

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http://dx.doi.org/10.1109/TUFFC.2018.2850535DOI Listing
December 2018
12 Reads

Tidal breathing parameters measured by structured light plethysmography in children aged 2-12 years recovering from acute asthma/wheeze compared with healthy children.

Physiol Rep 2018 Jun;6(12):e13752

University Hospitals of North Midlands, Stoke-on-Trent, UK.

Measurement of lung function can be difficult in young children. Structured light plethysmography (SLP) is a novel, noncontact method of measuring tidal breathing that monitors displacement of the thoraco-abdominal wall. SLP was used to compare breathing in children recovering from an acute exacerbation of asthma/wheeze and an age-matched cohort of controls. Read More

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http://doi.wiley.com/10.14814/phy2.13752
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http://dx.doi.org/10.14814/phy2.13752DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6014477PMC
June 2018
7 Reads

Near-infrared spectroscopy using indocyanine green dye for minimally invasive measurement of respiratory and leg muscle blood flow in patients with COPD.

J Appl Physiol (1985) 2018 Sep 21;125(3):947-959. Epub 2018 Jun 21.

GP Livanos and M Simou Laboratories, Department of Critical Care Medicine and Pulmonary Services, Medical School of Athens University, Evangelismos Hospital , Athens , Greece.

Reliability of near-infrared spectroscopy, measuring indocyanine green (ICG) for minimally invasive assessment of relative muscle blood flow during exercise has been examined in fit young individuals but not in chronic obstructive pulmonary disease (COPD). Here we ask whether it could be used to evaluate respiratory and locomotor muscle perfusion in COPD patients. Vastus lateralis muscle blood flow (MBF, the reference method calculated from arterial and muscle ICG concentration curves) and a blood flow index [BFI, calculated using only the (same) muscle ICG concentration curves] were compared in 10 patients (forced expiratory volume in 1 s: 51 ± 6% predicted) at rest and during cycling at 25, 50, 75, and 100% of peak work rate (WR). Read More

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http://dx.doi.org/10.1152/japplphysiol.00959.2017DOI Listing
September 2018
11 Reads

Relationship of aortic excess pressure obtained using pressure-only reservoir pressure analysis to directly measured aortic flow in humans.

Physiol Meas 2018 06 28;39(6):064006. Epub 2018 Jun 28.

Monash Cardiovascular Research Centre, School of Clinical Science at Monash Health, Monash Health, Melbourne, Australia. Joint first authors.

Objectives: A reservoir pressure model describing left ventricular-large artery interaction has been proposed as a useful heuristic model providing insight into the propagation of the central blood pressure as well as providing clinical prognostic information. A pressure-only approach to calculation of reservoir pressure waves has been proposed but this assumes that the resultant excess pressure is proportional to the volume flow rate out of the left ventricle; this has not been tested in humans.

Approach: We use non-invasively acquired central pressure and flow data obtained in the 2nd Australian National Blood Pressure Study to test this assumption and to investigate the use of flow approximations based on excess pressure or an assumed triangular flow pattern in calculation of forward and backwards waves in the aortic root. Read More

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http://dx.doi.org/10.1088/1361-6579/aaca87DOI Listing

GC quantitative analysis of benzyl isothiocyanate in roots extract and dental care herbal products.

Saudi Pharm J 2018 May 11;26(4):462-466. Epub 2018 Feb 11.

Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia.

An accurate, sensitive, precise and simple method was developed utilizing Gas Chromatography for the quantitative analysis of benzyl isothicyanate in Siwak extract and dental care herbal products claimed to contain Siwak. Rtx (30.0 m × 0. Read More

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http://dx.doi.org/10.1016/j.jsps.2018.02.013DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5961752PMC
May 2018
7 Reads

Quantitative Blood Flow Assessment by Multiparameter Analysis of Indocyanine Green Video Angiography.

World Neurosurg 2018 Aug 3;116:e187-e193. Epub 2018 May 3.

Department of Neurosurgery, Asahikawa Medical University, Hokkaido, Japan. Electronic address:

Background: Measurements of quantitative blood flow are crucial during brain vascular surgery. Indocyanine green video angiography (ICG-VAG) is an accepted method of blood flow visualization; however, quantitative techniques have not yet been established. Thus, the aim of this study was to further develop ICG analysis for visualizing intraoperative flow changes. Read More

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http://dx.doi.org/10.1016/j.wneu.2018.04.148DOI Listing
August 2018
5 Reads

Effect of dietary nitrate supplementation on conduit artery blood flow, muscle oxygenation, and metabolic rate during handgrip exercise.

J Appl Physiol (1985) 2018 Aug 3;125(2):254-262. Epub 2018 May 3.

Department of Kinesiology, Kansas State University , Manhattan, Kansas.

Dietary nitrate supplementation has positive effects on mitochondrial and muscle contractile efficiency during large muscle mass exercise in humans and on skeletal muscle blood flow (Q̇) in rats. However, concurrent measurement of these effects has not been performed in humans. Therefore, we assessed the influence of nitrate supplementation on Q̇ and muscle oxygenation characteristics during moderate- (40 %peak) and severe-intensity(85% peak) handgrip exercise in a randomized, double-blind, crossover design. Read More

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http://dx.doi.org/10.1152/japplphysiol.00772.2017DOI Listing
August 2018
5 Reads

Patient experience of nasal obstruction and its clinical assessment.

J Laryngol Otol 2018 Apr 7;132(4):318-322. Epub 2018 Mar 7.

Department of Rhinology and Facial Plastic Surgery,Royal National Throat,Nose and Ear Hospital,London,UK.

Background: The correlation between objective and subjective nasal obstruction is poor, and dissatisfaction rates after surgery for nasal obstruction are high. Accordingly, novel assessment techniques may be required. This survey aimed to determine patient experience and preferences for the measurement of nasal obstruction. Read More

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https://www.cambridge.org/core/product/identifier/S002221511
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http://dx.doi.org/10.1017/S0022215117002146DOI Listing
April 2018
3 Reads

Comparative study on the analgesic effect of acute ipsilateral shoulder pain after open thoracotomy between preoperative ultrasound guided suprascapular nerve block (SNB) and intraoperative phrenic nerve infiltration (PNI) in cancer lung patients.

J Egypt Natl Canc Inst 2018 Mar 7;30(1):27-31. Epub 2018 Feb 7.

Department of Anaesthesia, National Cancer Institute, Cairo University, Egypt.

Introduction: Acute ipsilateral shoulder pain (ISP) is a common complaint in patients after thoracotomy. The incidence ranges from 21% to 97%. Unfortunately, clinical studies did not put enough focus on ISP post thoracic surgery. Read More

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http://dx.doi.org/10.1016/j.jnci.2018.01.003DOI Listing
March 2018
10 Reads

Effect of Mannitol on Ultrasonographically Measured Optic Nerve Sheath Diameter as a Surrogate for Intracranial Pressure During Robot-Assisted Laparoscopic Prostatectomy with Pneumoperitoneum and the Trendelenburg Position.

J Endourol 2018 Jul 13;32(7):608-613. Epub 2018 Mar 13.

3 Department of Anesthesiology and Pain Medicine, Asan Medical Center, University of Ulsan College of Medicine , Seoul, Korea.

Introduction: CO pneumoperitoneum and the steep Trendelenburg position during robot-assisted laparoscopic prostatectomy (RALP) can increase intracranial pressure (ICP). Mannitol is widely used to treat increased ICP. However, no studies to date have specifically evaluated the effect of mannitol on ICP in patients undergoing RALP. Read More

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http://dx.doi.org/10.1089/end.2017.0828DOI Listing
July 2018
9 Reads

Development and validation of a high-performance liquid chromatography method for the quantitation of intracellular PARP inhibitor Olaparib in cancer cells.

J Pharm Biomed Anal 2018 Apr 31;152:74-80. Epub 2018 Jan 31.

Université Clermont Auvergne, Institut Universitaire de Technologie, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, F-63000 Clermont Ferrand, France.

Olaparib is a potent PARP inhibitor in clinical use for cancer therapy. A bioanalytical assay was developed and validated for quantitation of intracellular level of olaparib in cells exposed to the drug. The assay involves an optimized and straightforward sample pretreatment with acetonitrile for olaparib solubilization, cell lysis and protein precipitation, and a high performance liquid chromatography (HPLC) method with ultraviolet detection. Read More

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http://dx.doi.org/10.1016/j.jpba.2018.01.036DOI Listing
April 2018
25 Reads

Dobutamine Stress Echocardiography for Management of Low-Flow, Low-Gradient Aortic Stenosis.

J Am Coll Cardiol 2018 Feb;71(5):475-485

Institut Universitaire de Cardiologie et de Pneumologie, Université Laval, Québec, Canada; Department of Cardiovascular Diseases, Mayo Clinic, Rochester, Minnesota. Electronic address:

Background: In the American College of Cardiology/American Heart Association guidelines, patients are considered to have true-severe stenosis when the mean gradient (MG) is ≥40 mm Hg with an aortic valve area (AVA) ≤1 cm during dobutamine stress echocardiography (DSE). However, these criteria have not been previously validated.

Objectives: The aim of this study was to assess the value of these criteria to predict the presence of true-severe AS and the occurrence of death in patients with low-flow, low-gradient aortic stenosis (LF-LG AS). Read More

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http://dx.doi.org/10.1016/j.jacc.2017.11.052DOI Listing
February 2018
12 Reads

Analysis of the clinical value of fractional flow reserve for prognosis evaluation of patients of percutaneous coronary intervention.

Exp Ther Med 2018 Jan 1;15(1):673-678. Epub 2017 Nov 1.

Department of Cardiology, Tangshan Workers' Hospital, Tangshan, Hebei 063000, P.R. China.

We investigated the clinical value of fractional flow reserve (FFR) for the prognostic evaluation of patients with percutaneous coronary intervention. We enrolled 120 patients who were admitted to the hospital to undergo percutaneous coronary intervention for acute coronary syndromes between May 2014 and June 2015. The 120 patients were divided into two groups, the observation group and the control group, according to the post-surgery level of FFR. Read More

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http://dx.doi.org/10.3892/etm.2017.5433DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5769269PMC
January 2018
12 Reads

Pretreatment Prediction of the Outcomes of Intranasal Steroid Sprays in Cases with Inferior Turbinate Hypertrophy.

Turk Arch Otorhinolaryngol 2017 Sep 14;55(3):105-110. Epub 2017 Aug 14.

Clinic of Otorhinolaryngology, Haseki Training and Research Hospital, İstanbul, Turkey.

Objective: Intranasal steroid sprays (INSS) are frequently prescribed for treating inferior turbinate hypertrophy (ITH). Complications due to the long-term application of INSS such as crusting, epistaxis, nasal mucosa dryness, and septal perforation may occur. Predicting patients who would benefit from INSS early might lower treatment costs and complication rates. Read More

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http://dx.doi.org/10.5152/tao.2017.2443DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5782987PMC
September 2017
3 Reads

The noninvasive simultaneous measurement of tissue oxygenation and microvascular hemodynamics during incremental handgrip exercise.

J Appl Physiol (1985) 2018 Mar 14;124(3):604-614. Epub 2017 Dec 14.

Department of Kinesiology, Kansas State University , Manhattan, Kansas.

Limb blood flow increases linearly with exercise intensity; however, invasive measurements of muscle microvascular blood flow during incremental exercise have demonstrated submaximal plateaus. We tested the hypotheses that 1) brachial artery blood flow (Q̇) would increase with increasing exercise intensity until task failure, 2) blood flow index of the flexor digitorum superficialis (BFI) measured noninvasively via diffuse correlation spectroscopy would plateau at a submaximal work rate, and 3) muscle oxygenation characteristics (total-[heme], deoxy-[heme], and percentage saturation) measured noninvasively with near-infrared spectroscopy would demonstrate a plateau at a similar work rate as BFI. Sixteen subjects (23. Read More

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http://dx.doi.org/10.1152/japplphysiol.00815.2017DOI Listing
March 2018
6 Reads

Associations between microalbuminuria and parameters of flow-mediated vasodilatation obtained by continuous measurement approaches.

Clin Exp Hypertens 2018 19;40(8):715-720. Epub 2018 Jan 19.

b Department of Cardiology , Fukuoka University School of Medicine , Fukuoka , Japan.

The associations between microalbuminuria and various parameters of flow-mediated vasodilatation (FMD) are not completely understood. We retrospectively analyzed 265 consecutive patients who underwent coronary angiography and in whom we could measure FMD and the urine albumin-creatinine ratio (UACR). Using 15 continuous measurement approaches, we measured FMD as the magnitude of the percentage change in the brachial artery diameter from baseline to peak (bFMD), the maximum FMD rate calculated as the maximal slope of dilation (FMD-MDR), and the integrated FMD response calculated as the area under the dilation curve during the 60- and 120-s dilation periods (FMD-AUC60 and FMD-AUC120). Read More

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http://dx.doi.org/10.1080/10641963.2018.1425422DOI Listing
December 2018
6 Reads

On-tubing fluorescence measurements of the band broadening of contemporary injectors in ultra-high performance liquid chromatography.

J Chromatogr A 2018 Feb 15;1535:44-54. Epub 2017 Dec 15.

Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium.

We report on a detailed study of the injection contribution to band broadening in contemporary UHPLC-instruments, using either flow-through needle or fixed loop injection (full loop). Using on-tubing fluorescence measurements at the outlet of the injector valve, very localized and undisturbed measurements were obtained. Varying both the flow rate and the injected volume allowed to split the injection variance (σ) in a volumetric component (related to the amount injected) and a hydrodynamic component (related to the flow rate). Read More

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http://dx.doi.org/10.1016/j.chroma.2017.12.032DOI Listing
February 2018
5 Reads