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[PMID]:27273874
[Au] Autor:Foong RE; Rosenow T; Simpson SJ; Stöklin B; Gray D; Pillow JJ; Hall GL; Ramsey KA
[Ad] Endereço:Telethon Kids Institute, Subiaco, Western Australia, Australia.
[Ti] Título:End-inspiratory molar mass step correction for analysis of infant multiple breath washout tests.
[So] Source:Pediatr Pulmonol;52(1):10-13, 2017 Jan.
[Is] ISSN:1099-0496
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A refined software algorithm was recently proposed for the analysis of infant multiple breath washout (MBW) measurements. The proposed algorithm uses the change in end-inspiratory molar mass between the wash-in and wash-out curves (EIMM-step) to define the required step response correction of the MM signal and is assumed to provide an accurate evaluation of complete washout of the tracer gas, in comparison to the current software algorithm which applies the change in end-expiratory molar mass (EEMM)-step. We aimed to evaluate the use of the EIMM-step method in a broad range of infants. We performed retrospective analyses comparing the EIMM- and EEMM-step change methods in MBW data collected from infants with cystic fibrosis (CF), infants born preterm, and healthy infants using an ultrasonic flowmeter. We found that the EIMM-step correction significantly increased LCI and functional residual capacity (FRC) in infants with CF, preterm infants, and healthy infants compared with the EEMM-step method. In addition, more than half the measurements that were technically acceptable and repeatable using the EEMM-step correction in healthy infants were excluded after using the EIMM-step correction. We found a large difference between the EIMM- and EEMM-steps in healthy infants indicating incomplete washout, suggesting the need for a longer washout time with using the EIMM-step analysis method. The data indicates that the EIMM-step analysis method may have the potential to generate false abnormal LCI values in individuals without lung disease. Revised normative data may be required if this method is universally adopted. Pediatr Pulmonol. 2017;52:10-13. © 2016 Wiley Periodicals, Inc.
[Mh] Termos MeSH primário: Testes Respiratórios/métodos
Fibrose Cística/fisiopatologia
Testes de Função Respiratória/métodos
[Mh] Termos MeSH secundário: Algoritmos
Feminino
Fluxômetros
Capacidade Residual Funcional/fisiologia
Seres Humanos
Lactente
Recém-Nascido
Recém-Nascido Prematuro
Masculino
Respiração
Estudos Retrospectivos
Software
[Pt] Tipo de publicação:LETTER
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171003
[Lr] Data última revisão:
171003
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160609
[St] Status:MEDLINE
[do] DOI:10.1002/ppul.23499


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[PMID]:27852010
[Au] Autor:Nowakowski L; Futyma K; Zietek A; Bogusiewicz M; Galczynski K; Rechberger T
[Ad] Endereço:Second Department of Gynaecology, Medical University of Lublin, Lublin, Poland. Electronic address: luknowakow@gmail.com.
[Ti] Título:Use of free uroflowmetry vs pressure-flow studies in the diagnosis of overactive bladder syndrome in females.
[So] Source:Eur J Obstet Gynecol Reprod Biol;207:137-140, 2016 Dec.
[Is] ISSN:1872-7654
[Cp] País de publicação:Ireland
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: To determine if pressure-flow study (PFS) parameters, including flow index (FI) calculated by dividing average urethral flow by maximal urethral flow, increase the accuracy of urodynamic studies in the diagnosis of overactive bladder (OAB). STUDY DESIGN: Retrospective study to evaluate the medical history and urodynamic examination results of female patients diagnosed with lower urinary tract symptoms (LUTS) between January 2014 and December 2015. Patients were stratified into four groups depending on the type of LUTS: OAB; stress urinary incontinence (SUI); mixed urinary incontinence with predominant SUI symptoms (MUI-SUI); and mixed urinary incontinence with predominant OAB symptoms (MUI-OAB). RESULTS: OAB was diagnosed in 26 (15%) patients, SUI was diagnosed in 93 (52%) patients, MUI-OAB was diagnosed in 43 (24%) patients, and MUI-SUI was diagnosed in 17 (9%) patients. FI calculated using free uroflowmetry (FI-free) was significantly lower in the OAB group compared with the other groups (p<0.01). Analysis revealed no difference in FI-free between the SUI, MUI-SUI and MUI-OAB groups. Significant differences were found between the study groups for most free uroflowmetric parameters, including maximal urethral flow, average urethral flow and micturition volume (p<0.05). Similar differences were not found in PFS parameters. CONCLUSIONS: The decrease in the urethral lumen due to the presence of a transurethral catheter in patients with OAB, in contrast to women with SUI and MUI, was not found to influence FI calculated using free uroflowmetry or PFS. FI may serve as an important objective diagnostic tool for OAB, but only when calculated from free uroflowmetry parameters when assessing patients with LUTS.
[Mh] Termos MeSH primário: Bexiga Urinária Hiperativa/diagnóstico
[Mh] Termos MeSH secundário: Adulto
Idoso
Algoritmos
Diagnóstico Diferencial
Feminino
Fluxômetros
Hospitais Universitários
Seres Humanos
Meia-Idade
Polônia
Pressão
Estudos Retrospectivos
Reologia
Bexiga Urinária Hiperativa/fisiopatologia
Incontinência Urinária por Estresse/diagnóstico
Incontinência Urinária por Estresse/fisiopatologia
Incontinência Urinária de Urgência/diagnóstico
Incontinência Urinária de Urgência/fisiopatologia
Micção
Urodinâmica
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170414
[Lr] Data última revisão:
170414
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161117
[St] Status:MEDLINE


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[PMID]:26747263
[Au] Autor:Kweon J; Yang DH; Kim GB; Kim N; Paek M; Stalder AF; Greiser A; Kim YH
[Ad] Endereço:Department of Cardiology and Heart Institute, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
[Ti] Título:Four-dimensional flow MRI for evaluation of post-stenotic turbulent flow in a phantom: comparison with flowmeter and computational fluid dynamics.
[So] Source:Eur Radiol;26(10):3588-97, 2016 Oct.
[Is] ISSN:1432-1084
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:OBJECTIVES: To validate 4D flow MRI in a flow phantom using a flowmeter and computational fluid dynamics (CFD) as reference. METHODS: Validation of 4D flow MRI was performed using flow phantoms with 75 % and 90 % stenosis. The effect of spatial resolution on flow rate, peak velocity and flow patterns was investigated in coronal and axial scans. The accuracy of flow rate with 4D flow MRI was evaluated using a flowmeter as reference, and the peak velocity and flow patterns obtained were compared with CFD analysis results. RESULTS: 4D flow MRI accurately measured the flow rate in proximal and distal regions of the stenosis (percent error ≤3.6 % in axial scanning with 1.6-mm resolution). The peak velocity of 4D flow MRI was underestimated by more than 22.8 %, especially from the second half of the stenosis. With 1-mm isotropic resolution, the maximum thickness of the recirculating flow region was estimated within a 1-mm difference, but the turbulent velocity fluctuations mostly disappeared in the post-stenotic region. CONCLUSION: 4D flow MRI accurately measures the flow rates in the proximal and distal regions of a stenosis in axial scan but has limitations in its estimation of peak velocity and turbulent characteristics. KEY POINTS: • 4D flow MRI accurately measures the flow rate in axial scan. • The peak velocity was underestimated by 4D flow MRI. •4D flow MRI demonstrates the principal pattern of post-stenotic flow.
[Mh] Termos MeSH primário: Arteriopatias Oclusivas/diagnóstico por imagem
Hidrodinâmica
Angiografia por Ressonância Magnética/métodos
Modelos Cardiovasculares
[Mh] Termos MeSH secundário: Arteriopatias Oclusivas/fisiopatologia
Velocidade do Fluxo Sanguíneo/fisiologia
Simulação por Computador
Constrição Patológica
Fluxômetros
Seres Humanos
Imagem Tridimensional/métodos
Imagens de Fantasmas
[Pt] Tipo de publicação:COMPARATIVE STUDY; JOURNAL ARTICLE; VALIDATION STUDIES
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171010
[Lr] Data última revisão:
171010
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160110
[St] Status:MEDLINE
[do] DOI:10.1007/s00330-015-4181-6


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[PMID]:27163420
[Au] Autor:Erdem O; Memetoglu ME; Tekin AI; Arslan Ü; Akkaya Ö; Kutlu R; Gölbasi I
[Ad] Endereço:School of Medicine, Akdeniz University, Antalya, Turkey.
[Ti] Título:Effects of intraoperative diltiazem infusion on flow changes in arterial and venous grafts in coronary artery bypass graft surgery.
[So] Source:Rev Bras Cir Cardiovasc;30(4):459-65, 2015 Jul-Aug.
[Cp] País de publicação:Brazil
[La] Idioma:eng
[Ab] Resumo:OBJECTIVE: This study aimed to show the effects of intra-operative diltiazem infusion on flow in arterial and venous grafts in coronary artery bypass graft surgery. METHODS: Hundred fourty patients with a total of 361 grafts [205 (57%) arterial and 156 (43%) venous] underwent isolated coronary surgery. All the grafts were measured by intraoperative transit time flow meter intra-operatively. Group A (n=70) consisted of patients who received diltiazem infusion (dose of 2.5 microgram/kg/min), and Group B (n=70) didn't receive diltiazem infusion. RESULTS: Mean graft flow values of left internal mammary artery were 53 ml/min in Group A and 40 ml/min in Group B (P<0.001). Pulsatility index (PI) values of left internal mammary artery for Group A and Group B were 2.6 and 3.0 respectively (P<0.001). No statistically significant difference was found between venous graft parameters. CONCLUSION: We recommend an effect of diltiazem infusion in increasing graft flows in coronary artery bypass graft operations.
[Mh] Termos MeSH primário: Anti-Hipertensivos/farmacologia
Ponte de Artéria Coronária/métodos
Circulação Coronária/efeitos dos fármacos
Diltiazem/farmacologia
Infusões Intra-Arteriais/métodos
Cuidados Intraoperatórios/métodos
Reperfusão Miocárdica
Enxerto Vascular/métodos
[Mh] Termos MeSH secundário: Adulto
Idoso
Idoso de 80 Anos ou mais
Anti-Hipertensivos/administração & dosagem
Diltiazem/administração & dosagem
Feminino
Fluxômetros
Seres Humanos
Anastomose de Artéria Torácica Interna-Coronária
Masculino
Artéria Torácica Interna/cirurgia
Meia-Idade
Valor Preditivo dos Testes
Resultado do Tratamento
[Pt] Tipo de publicação:JOURNAL ARTICLE; RANDOMIZED CONTROLLED TRIAL
[Nm] Nome de substância:
0 (Antihypertensive Agents); EE92BBP03H (Diltiazem)
[Em] Mês de entrada:1607
[Cu] Atualização por classe:170224
[Lr] Data última revisão:
170224
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160511
[St] Status:MEDLINE


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[PMID]:26593699
[Au] Autor:Tang KP; Chau KH; Kan CW; Fan JT
[Ad] Endereço:Institute of Textiles and Clothing, the Hong Kong Polytechnic University, Hung Hom, Hong Kong.
[Ti] Título:Characterizing the transplanar and in-plane water transport properties of fabrics under different sweat rate: Forced Flow Water Transport Tester.
[So] Source:Sci Rep;5:17012, 2015 Nov 23.
[Is] ISSN:2045-2322
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The water absorption and transport properties of fabrics are critical to wear comfort, especially for sportswear and protective clothing. A new testing apparatus, namely Forced Flow Water Transport Tester (FFWTT), was developed for characterizing the transplanar and in-plane wicking properties of fabrics based on gravimetric and image analysis technique. The uniqueness of this instrument is that the rate of water supply is adjustable to simulate varying sweat rates with reference to the specific end-use conditions ranging from sitting, walking, running to other strenuous activities. This instrument is versatile in terms of the types of fabrics that can be tested. Twenty four types of fabrics with varying constructions and surface finishes were tested. The results showed that FFWTT was highly sensitive and reproducible in differentiating these fabrics and it suggests that water absorption and transport properties of fabrics are sweat rate-dependent. Additionally, two graphic methods were proposed to map the direction of liquid transport and its relation to skin wetness, which provides easy and direct comparison among different fabrics. Correlation analysis showed that FFWTT results have strong correlation with subjective wetness sensation, implying validity and usefulness of the instrument.
[Mh] Termos MeSH primário: Reologia/instrumentação
Suor/fisiologia
Sudorese/fisiologia
Têxteis/análise
Água/metabolismo
[Mh] Termos MeSH secundário: Transporte Biológico
Vestuário
Desenho de Equipamento
Exercício/fisiologia
Fluxômetros
Seres Humanos
Pele
Molhabilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1609
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151124
[St] Status:MEDLINE
[do] DOI:10.1038/srep17012


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[PMID]:26445047
[Au] Autor:Iwasaki W; Nogami H; Takeuchi S; Furue M; Higurashi E; Sawada R
[Ad] Endereço:Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, 807-1 Shuku-machi, Tosu, Saga 841-0052, Japan. wataru.iwasaki@aist.go.jp.
[Ti] Título:Detection of Site-Specific Blood Flow Variation in Humans during Running by a Wearable Laser Doppler Flowmeter.
[So] Source:Sensors (Basel);15(10):25507-19, 2015 Oct 05.
[Is] ISSN:1424-8220
[Cp] País de publicação:Switzerland
[La] Idioma:eng
[Ab] Resumo: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 flowmeter using microelectromechanical systems technology. This micro blood flowmeter is wearable and capable of stable measurement signals even during movement. Therefore, we attempted to measure skin blood flow at the forehead, fingertip, and earlobe of seven young men while running as a pilot experiment to extend the utility of the micro blood flowmeter. We measured blood flow in each subject at velocities of 6, 8, and 10 km/h. We succeeded in obtaining stable measurements of blood flow, with few motion artifacts, using the micro blood flowmeter, and the pulse wave signal and motion artifacts were clearly separated by conducting frequency analysis. Furthermore, the results showed that the extent of the changes in blood flow depended on the intensity of exercise as well as previous work with an ergometer. Thus, we demonstrated the capability of this wearable blood flow sensor for measurement during exercise.
[Mh] Termos MeSH primário: Fluxometria por Laser-Doppler/instrumentação
Monitorização Ambulatorial/instrumentação
Fluxo Sanguíneo Regional/fisiologia
Corrida/fisiologia
[Mh] Termos MeSH secundário: Adulto
Fluxômetros
Hemodinâmica
Seres Humanos
Fluxometria por Laser-Doppler/métodos
Masculino
Sistemas Microeletromecânicos
Aplicativos Móveis
Reologia
Telemetria/instrumentação
Adulto Jovem
[Pt] Tipo de publicação:CLINICAL TRIAL; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1604
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151008
[St] Status:MEDLINE
[do] DOI:10.3390/s151025507


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[PMID]:26075554
[Au] Autor:Subbarao P; Milla C; Aurora P; Davies JC; Davis SD; Hall GL; Heltshe S; Latzin P; Lindblad A; Pittman JE; Robinson PD; Rosenfeld M; Singer F; Starner TD; Ratjen F; Morgan W
[Ad] Endereço:1 Division of Respiratory Medicine, Department of Pediatrics, Physiology, and Experimental Medicine, The Research Institute, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
[Ti] Título:Multiple-Breath Washout as a Lung Function Test in Cystic Fibrosis. A Cystic Fibrosis Foundation Workshop Report.
[So] Source:Ann Am Thorac Soc;12(6):932-9, 2015 Jun.
[Is] ISSN:2325-6621
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The lung clearance index (LCI) is a lung function parameter derived from the multiple-breath washout (MBW) test. Although first developed 60 years ago, the technique was not widely used for many years. Recent technological advances in equipment design have produced gains in popularity for this test among cystic fibrosis (CF) researchers and clinicians, particularly for testing preschool-aged children. LCI has been shown to be feasible and sensitive to early CF lung disease in patients of all ages from infancy to adulthood. A workshop was convened in January 2014 by the North American Cystic Fibrosis Foundation to determine the readiness of the LCI for use in multicenter clinical trials as well as clinical care. The workshop concluded that the MBW text is a valuable potential outcome measure for CF clinical trials in preschool-aged patients and in older patients with FEV1 in the normal range. However, gaps in knowledge about the choice of device, gas, and standardization across systems are key issues precluding its use as a clinical trial end point in infants. Based on the current evidence, there are insufficient data to support the use of LCI or MBW parameters in the routine clinical management of patients with CF.
[Mh] Termos MeSH primário: Testes Respiratórios
Fibrose Cística/diagnóstico
Volume Expiratório Forçado
[Mh] Termos MeSH secundário: Testes Respiratórios/instrumentação
Testes Respiratórios/métodos
Pré-Escolar
Fibrose Cística/fisiopatologia
Progressão da Doença
Fluxômetros
Seres Humanos
Lactente
Recém-Nascido
Monitorização Fisiológica/métodos
Avaliação de Resultados (Cuidados de Saúde)
Prognóstico
Reprodutibilidade dos Testes
Testes de Função Respiratória/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1603
[Cu] Atualização por classe:170615
[Lr] Data última revisão:
170615
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150616
[St] Status:MEDLINE
[do] DOI:10.1513/AnnalsATS.201501-021FR


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[PMID]:25582526
[Au] Autor:Kulnik ST; MacBean V; Birring SS; Moxham J; Rafferty GF; Kalra L
[Ad] Endereço:Stroke Research Team, Department of Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience, King's College London, PO Box 41, Denmark Hill, London, SE5 8AF, UK.
[Ti] Título:Accuracy of portable devices in measuring peak cough flow.
[So] Source:Physiol Meas;36(2):243-57, 2015 Feb.
[Is] ISSN:1361-6579
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Peak cough flow (PCF) measurements can be used as indicators of cough effectiveness. Portable peak flow meters and spirometers have been used to measure PCF, but little is known about their accuracy compared to pneumotachograph systems. The aim of this study was to compare the accuracy of four portable devices (Mini-Wright and Assess peak flow meters, SpiroUSB and Microlab spirometers) in measuring PCF with a calibrated laboratory based pneumotachograph system. Twenty healthy volunteers (mean (SD) age 45 (16) years) coughed through a pneumotachograph connected in series with each portable device in turn, and the differences in PCF readings were analysed. In addition, mechanically generated flow waves of constant peak flow were delivered through each device both independently and when connected in series with the pneumotachograph. Agreement between PCF readings obtained with the pneumotachograph and the portable devices was poor. Peak flow readings were on average lower by approximately 50 L min(-1) when measured using the portable devices; 95% limits of agreement spanned approximately 150 L min(-1). The findings highlight the potential for inaccuracy when using portable devices for the measurement of PCF. Depending on the measurement instrument used, absolute values of PCF reported in the literature may not be directly comparable.
[Mh] Termos MeSH primário: Tosse/fisiopatologia
Fluxômetros/normas
Pico do Fluxo Expiratório/fisiologia
[Mh] Termos MeSH secundário: Feminino
Fluxo Expiratório Forçado/fisiologia
Voluntários Saudáveis
Seres Humanos
Masculino
Meia-Idade
Espirometria/instrumentação
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1509
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150114
[St] Status:MEDLINE
[do] DOI:10.1088/0967-3334/36/2/243


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[PMID]:25500948
[Au] Autor:Ohnuma K; Homma A; Sumikura H; Tsukiya T; Takewa Y; Mizuno T; Mukaibayashi H; Kojima K; Katano K; Taenaka Y; Tatsumi E
[Ad] Endereço:Department of Artificial Organs, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita-shi, Osaka, 565-8565, Japan, ohnuma.kentaro@ri.ncvc.go.jp.
[Ti] Título:Development of a flow rate monitoring method for the wearable ventricular assist device driver.
[So] Source:J Artif Organs;18(2):106-13, 2015 Jun.
[Is] ISSN:1619-0904
[Cp] País de publicação:Japan
[La] Idioma:eng
[Ab] Resumo:Our research institute has been working on the development of a compact wearable drive unit for an extracorporeal ventricular assist device (VAD) with a pneumatically driven pump. A method for checking the pump blood flow on the side of the drive unit without modifying the existing blood pump and impairing the portability of it will be useful. In this study, to calculate the pump flow rate indirectly from measuring the flow rate of the driving air of the VAD air chamber, we conducted experiments using a mock circuit to investigate the correlation between the air flow rate and the pump flow rate as well as its accuracy and error factors. The pump flow rate was measured using an ultrasonic flow meter at the inflow and outflow tube, and the air flow was measured using a thermal mass flow meter at the driveline. Similarity in the instantaneous waveform was confirmed between the air flow rate in the driveline and the pump flow rate. Some limitations of this technique were indicated by consideration of the error factors. A significant correlation was found between the average pump flow rate in the ejecting direction and the average air flow rate in the ejecting direction (R2 = 0.704-0.856), and the air flow rate in the filling direction (R2 = 0.947-0.971). It was demonstrated that the average pump flow rate was estimated exactly in a wide range of drive conditions using the air flow of the filling phase.
[Mh] Termos MeSH primário: Velocidade do Fluxo Sanguíneo/fisiologia
Coração Auxiliar
Reologia/métodos
[Mh] Termos MeSH secundário: Pressão do Ar
Desenho de Equipamento
Fluxômetros
Hemodinâmica
Seres Humanos
Masculino
Modelos Cardiovasculares
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1607
[Cu] Atualização por classe:171013
[Lr] Data última revisão:
171013
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141216
[St] Status:MEDLINE
[do] DOI:10.1007/s10047-014-0811-z


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[PMID]:25417730
[Au] Autor:Basiricò S; Crosta GB; Frattini P; Villa A; Godio A
[Ad] Endereço:Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza, 4 - 20126, Milano, Italy.
[Ti] Título:Borehole flowmeter logging for the accurate design and analysis of tracer tests.
[So] Source:Ground Water;53 Suppl 1:3-9, 2015 Apr.
[Is] ISSN:1745-6584
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Tracer tests often give ambiguous interpretations that may be due to the erroneous location of sampling points and/or the lack of flow rate measurements through the sampler. To obtain more reliable tracer test results, we propose a methodology that optimizes the design and analysis of tracer tests in a cross borehole mode by using vertical borehole flow rate measurements. Experiments using this approach, herein defined as the Bh-flow tracer test, have been performed by implementing three sequential steps: (1) single-hole flowmeter test, (2) cross-hole flowmeter test, and (3) tracer test. At the experimental site, core logging, pumping tests, and static water-level measurements were previously carried out to determine stratigraphy, fracture characteristics, and bulk hydraulic conductivity. Single-hole flowmeter testing makes it possible to detect the presence of vertical flows as well as inflow and outflow zones, whereas cross-hole flowmeter testing detects the presence of connections along sets of flow conduits or discontinuities intercepted by boreholes. Finally, the specific pathways and rates of groundwater flow through selected flowpaths are determined by tracer testing. We conclude that the combined use of single and cross-borehole flowmeter tests is fundamental to the formulation of the tracer test strategy and interpretation of the tracer test results.
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Fluxômetros
Água Subterrânea
Movimentos da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1602
[Cu] Atualização por classe:150410
[Lr] Data última revisão:
150410
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:141125
[St] Status:MEDLINE
[do] DOI:10.1111/gwat.12293



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