components of an arterial pressure waveform
Báo cáo y học: "Clinical value of an arterial pressure-based cardiac output measurement device." pps
... Care Vol 12 No Lemson and van der Hoeven decisions on cardiac output changes of 10% to 15% likely results in unnecessary hemodynamic manipulation of unknown clinical impact and we would strongly ... meta-analysis of randomized clinical trials JAMA 2005, 294:1664-1670 Breukers R-M, Sepehrkhouv S, Spiegelenberg SR, Groeneveld ABJ: Cardiac output measured by a new arterial pressure waveform analysis ... FloTrac/Vigilio System References McGee WT, Horswell JL, Calderon J, Janvier G, Van ST, Van den BG, Kozikowski L: Validation of a continuous, arterial pressurebased cardiac output measurement: a multicenter,...
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Báo cáo y học: "itfalls in haemodynamic monitoring based on the arterial pressure waveform" ppsx
... degree of the pressure wave reflection at the arterial site (that is, radial versus femoral), the degree and rapidity of change of vascular tone and compliance, and the geometry of the arterial ... liver transplantation: pulmonary artery catheter versus uncalibrated arterial pressure waveform analysis Anesth Analg 2008, 106:1480-1486, table of contents Sakka SG, Kozieras J, Thuemer O, van Hout ... pulmonary artery Abbreviations σAP = arterial pressure; ABP = arterial blood pressure; APCO = arterial pressurebased cardiac output; APW = arterial pressure waveform; CO = cardiac output; FTV =...
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Báo cáo y học: "Goal-directed intraoperative therapy based on autocalibrated arterial pressure waveform analysis reduces hospital stay in high-risk surgical patients: a randomized, controlled trial" pot
... partial pressure of carbon dioxide level 32 to 38 mmHg) using a constant fresh gas flow of L min-1 Maintenance of anesthesia was performed with 0.9 to 1.8% end tidal sevoflurane, and fentanyl and ... administration of colloids instead of crystalloids can be seen [1,2,25,30] and may be most likely a result of an earlier detection of fluid demand with enhanced hemodynamic monitoring Kimberger and colleagues ... complicated than autocalibrated arterial waveform analysis because frequent manual recalibrations are required [28] and an artificial indicator limits the number of calibrations per day [29] Lopes and...
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Báo cáo y học: "Arterial pressure-based cardiac output in septic patients: different accuracy of pulse contour and uncalibrated pressure waveform devices" docx
... interventions by a Bland and Altman analysis (for absolute changes) and by linear regression analysis (for percentage changes) We tested the ability of CIpc and CIpw to detect an increase in CItd ... after stabilization of mean arterial pressure was obtained in Group 2) This set included heart rate, systemic arterial pressure, CIpc, CIpw, CItd, and SVR The values of CIpc and of CIpw were recorded ... CItd value because of calibration After the therapeutic interventions, we compared the absolute values of CIpc and of CIpw with that of CItd by a Bland and Altman analysis and calculated the...
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Báo cáo y học: "Effect of Acute Administration of an Herbal Preparation on Blood Pressure and Heart Rate in Humans"
... decongestants and is not a constituent of C aurantium Because of the known cardiovascular effects of nor-epinephrine and ephedrine, it has generally been assumed that consumption of p-synephrine and ... performed using x analysis of variance (ANOVA) For the first data analysis, treatment and time were the independent factors using all 23 subjects The second analysis separated and analyzed the data ... collected and analyzed during the next 10 of the session Heart rate and blood pressure were recorded at the end of expired air collection, approximately 72-75 after capsule ingestion Three analyses of...
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Exergoeconomic performance optimization of an endoreversible intercooled regenerated Brayton cogeneration plant Part 2: Heat conductance allocation and pressure ratio optimization
... state of optimal dimensionless profit rate (2) When the heat conductance allocation of the regenerator and the total pressure ratio are fixed, there exist an optimal intercooling pressure ratio and ... Journal of Energy and Environment (IJEE), Volume 2, Issue 2, 2011, pp.211-218 Conclusion Finite time exergoeconomic performance of a heat and power cogeneration plant model composed of an endoreversible ... allocations of the hot-, cold- and consumer-side heat exchangers, the intercooler and the regenerator for a fixed total heat exchanger conductance, the optimal heat conductance allocation of the regenerator...
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báo cáo hóa học: " Measuring the ICF components of impairment, activity limitation and participation restriction: an item analysis using classical test theory and item response theory" potx
... conception and design of the study, the analysis and the drafting and revision of the manuscript MJ participated in the conception and design of the study and the drafting and revision of the manuscript ... size of the sample and the nature and number of items as well as having other limitations IRT can overcome many of the problems of CTT but is more difficult to perform and understand [20] and ... was reported from the mean and standard deviation An item with a large mean would indicate the sample is more limited on that item than on an item with a lower mean; b) An assumption for correlational...
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Báo cáo hóa học: " Negative pressure characteristics of an evaporating meniscus at nanoscale" pptx
... Disjoining pressure increases significantly upon the formation of Maroo and Chung Nanoscale Research Letters 2011, 6:72 http://www.nanoscalereslett.com/content/6/1/72 Page of Figure X-Z plane of simulation ... work to study and quantify the components of negative pressures in evaporating nano-menisci using molecular dynamics simulation The disjoining and capillary pressures are evaluated in an evaporating ... induced negative pressure of water plugs in nanochannels Nano Lett 2003, 3:1537 Yang SH, Nosonovsky M, Zhang H, Chung KH: Nanoscale water capillary bridges under deeply negative pressure Chem Phys...
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Báo cáo lâm nghiệp: "Contribution of different solutes to the cell osmotic pressure in tap and lateral roots of maritime pine seedlings: effects of a potassium deficiency and of an all-macronutrient deficienc" pptx
... measured the osmotic pressure of single cells of the different parts of the root (TRA, TRPA and LRA) with a cryoscopic picolitre osmometer [12] and the osmotic pressure of the sap of these tissue ... growth and osmotic stress of maize roots An example of single-cell mapping, Plant Soil 187 (1996) 1I-21 ers, [17] [18] [19] Qi L., Fritz E., Tianqing L., Hüttermann A., X-ray microanalysis of ion ... although it is not part of the structure of any plant molecule, it is required for the activation of several enzymes, for protein synthesis and photosynthesis It also plays an important role in the vacuole...
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Báo cáo y học: " General and Specific Components of Depression and Anxiety in an Adolescent Population" pdf
... as an explanation for the overlap of depressive and anxious symptoms the role of physiological arousal is less clear and has to date been more significantly related to panic than to other anxiety ... statistical analysis and drafted the manuscript RAA contributed to the statistical analysis and the manuscript IMG conceived and designed the study and contributed at all stages of both the study and manuscript ... analyses can yield “pseudofactors” as artefacts of item difficulty or extremeness and can generate incorrect test statistics and standard errors [11] The purpose of the present study was to analyse...
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Báo cáo khoa học: "Clinical review: Interpretation of arterial pressure wave in shock states" pptx
... words, this rule of thumb implies that DAP contributes more to MAP, by a factor of two, than does SAP From a theoretical point of view, arterial compliance cannot be quantified by means of a single ... zeroing and calibration errors are prerequisites for optimal analysis of arterial pressure values and arterial pressure waveform Frequency response problems are especially evident in pressure ... remaining part of this review we focus on the informative value of the four pressures routinely measured (MAP, SAP, DAP and PP) and the clinical significance of respiratory changes in arterial pressure...
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Báo cáo khoa học: "Comparison of uncalibrated arterial waveform analysis in cardiac surgery patients with thermodilution cardiac output measurements" doc
... characteristics of the vascular resistance and the arterial compliance is re-calculated every 10 minutes on the basis of demographic data and the arterial waveform analysis Therefore, the aim of this ... and COWave showed a correlation coefficient of 0.54 (p < 0.01) and COPAC and COTranspulm a coefficient of 0.78 (p < 0.01) (Figure 2) Bland-Altman analysis for COPAC versus COWave showed a mean ... correlation coefficients of 0.36 (not significant) and 0.88 (p < 0.01), respectively (Figure 2) Bland-Altman analysis showed a mean bias and LOAs of 0.5 litres per minute and -1.7 to +0.7 litres...
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Báo cáo y học: "Validation of a continuous, arterial pressure-based cardiac output measurement: a multicenter, prospective clinical trial" pot
... unknown, for the purposes of our analysis we defined a significant change in cardiac output as 30% In analysis of the direction and the magnitude of change in cardiac output, the change in cardiac output ... volume, and mean arterial pressure, ranges are ± standard deviations bMean cardiac output as measured by arterial pressure- based cardiac output Table Most frequent patient comorbidities and most ... that would limit the utility of arterial pressure and waveform assessment related to the arterial pulse are limitations of the device A high-fidelity reliable arterial waveform is essential to cardiac...
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Báo cáo y học: "Preliminary study into the components of the fear-avoidance model of LBP: change after an initial chiropractic visit and influence on outcome." pps
... 18:21 http://www.chiroandosteo.com/content/18/1/21 Page of Table Pre and post initial visit mean scores Variable Pre Visit Post Visit p value (pre-post) Range Mean (SD) Range Mean (SD) PSS 0-72 50.8(18.0) ... fear avoidance and pain scores significantly reducing, and selfefficacy increasing However, back belief scores did not change significantly Pre and post scores were investigated for any association ... model, only CSQ and FAB remained as significant prognostic predictors The model accounted for between 37% and 53% of the variance in PGIC with a sensitivity of 71% and specificity of 89% In this...
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Báo cáo y học: " The velocity of the arterial pulse wave: a viscous-fluid shock wave in an elastic tube" pot
... increasing arterial pressure There are many published estimates of the modulus E for mammalian elastic arteries Estimates from studies of the change in arterial radius with changes in pressure ... ratio of flow rate to force gradient is constant in our model of a segment of an artery that does not contain a branch An equivalent assumption is that the value of R2 does not vary significantly ... includes an expression for damping of the pressure wave and (3) requires fewer assumptions and approximations in the derivation of an expression for the PWV A model for the leading part of the...
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Báo cáo y học: "Arterial pressure optimization in the treatment of septic shock: a complex puzzle" pot
... http://ccforum.com/content/14/1/102 We are therefore left to manage patients with consensus recommendations and our best clinical judgment Another important point of discussion of Dunser and colleagues’ report centers on ... may increase mortality This conclusion would require an experimental design that allowed testing of cause and effect rather than an analysis of association In our opinion, a more likely reason ... allow reduction of vasopressor therapy There are many factors about the cardiovascular support of sepsis that remain relatively unknown Although arterial blood pressure is important and is clearly...
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Báo cáo y học: " Arterial embolization of an extrapleural hematoma from a dislocated fracture of the lumbar spine: a case report" potx
... the publication of this case report and any accompanying images was obtained from Page of (page number not for citation purposes) Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine ... because of an EH and not because of the hemothorax An angiography was immediately performed to restore hemostasis; a shepherd-hook catheter (4 F, CX catheter A2; Koken, Tokyo, Japan) and a microcatheter ... method of management should be changed immediately, because embolization of the great anterior radicular artery can lead to spinal ischemia Abbreviations EH: extrapleural hematoma; AE: arterial...
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Báo cáo sinh học: " Inference about multiplicative heteroskedastic components of variance in a mixed linear Gaussian model with an application to beef cattle breeding" docx
... feature of this procedure is to assess, through a kind of analysis of variance, the effects of factors marginally or jointly For instance, one can test heterogeneity of sire variances among breeds of ... open on the important and complicated question of the joint modelling of means and variances (Aitkin, 1987; Nelder, 1991; Helder and Lee, 1991) van = = ACKNOWLEDGMENTS The work of the first author ... Heterogeneity of variance and dairy cattle breeding Anim Prod 55, 321-329 Visscher PM, Thompson R, Hill WG (1991) Estimation of genetic and environmental variances for fat yield in individual herds and an...
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Development of an approach for interface pressure measurement and analysis for study of sitting
... a standard deviation of around 10% and 15% of the mean, whereas for 33 Development of an approach for interface pressure measurement and analysis for study of sitting the CONFORMat, the standard ... 4.18 An example of the complete process and result of the dynamic pressure change analytical method 79 Figure 4.19 (a) A snapshot of a pressure movie (b) the COP trajectory of the pressure ... high pressure area, pressure distribution quality and some other analytical parameters [50-53] Reed and Lehto used quantitative metrics to analysis 17 Development of an approach for interface pressure...
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List the components of a radio system
... Output is in the range of the highest sum and the lowest difference of the two frequencies – Sum and differences are known as the sidebands of the frequency carrier • Shield transmitted signal ... the bandwidth of a channel into several smaller frequencies bands – Cable television is transmitted using FDMA – Crosstalk • Causes interference on the other frequency and may disrupt the transmission ... directions simultaneously – Example: A telephone system – If the same antenna is used for wireless transmission and reception • A filter can be used to handle full-duplex transmissions – Full-duplex...
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