1,720,972 research outputs found
Clinical validation of an automatic device measuring blood pressure in the fingers.
No full textBACKGROUND: To assess the agreement between a new automatic device (FS-20D) using a cuff-oscillometric method to measure arterial blood pressure (BP) in the fingers and a standard mercury sphygmomanometer. METHODS: The blood pressure measurements were taken in a sequential order, in a sample of both normotensive subjects (n. 57) and slight to moderate hypertensive patients (n. 28) without vascular complications. RESULTS: The mean sphygmomanometer-monitor difference was 0.52 +/- 4.57 mmHg for systolic and 0.25 +/- 4.41 mmHg for diastolic values; the agreement limits were: SBP -8.6 divided by 9.6 mmHg, 95% CI: -0.5 divided by 1.5; DBP: -8.6 divided by 9.1 mmHg, 95% CI: -0.7 divided by 1.2. The grade of agreement between the monitor and the sphygmomanometer was "A" (British Hypertension Society) for both systolic and diastolic values (difference of readings < 5 mmHg: 82%; < 10 mmHg: 97% for systolic blood pressure, 98% of diastolic blood pressure). CONCLUSIONS: The monitor was proved to be reliable with a good level of precision and accuracy. The FS-20D monitor may be used in self-monitoring of blood pressure of patients with slight to moderate hypertensio
Confronto tra treadmill e cyclette nel programma di allenamento di pazienti affetti da arteriopatia periferica al II stadio di Fontaine.
No full textSimple spice based modeling platform for 4.5 kV power IGBT modules
No full textThe paper deals with the development of a PSpice based modeling platform for the evaluation of 4.5 kV and 2.0 kA power IGBT modules to be used in HVDC and FACTS applications. Using PSpice, a set of device parameters (both for IGBTs and diodes) have first been extracted and verified by static and dynamic comparison of experimental data from 4.5 kV and 2.0 kA Si based power modules. Implemented device models along with complete gate driver circuitry unit in PSpice show fair agreement with experimental dynamic results and present realistic prediction of losses under various operating conditions (i.e., voltage and current ratings, stray inductances, gate resistances, temperature, variations in gate currents and gate voltages etc). The modeling platform, thus, supports not only the performance prediction of converter cell design but also possibly avoids the usage of extensive laboratory testing
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Tryptase serum level as a possible indicator of scombroid syndrome.
No full textScombroid syndrome (histamine fish poisoning--HFP) is a complex of symptoms caused by biogenic amines, mainly histamine, contained in seafood. The diagnosis of HFP is quite difficult as the symptoms of this particular condition are similar to the symptoms of a normal allergic syndrome.We have collected 10 cases (3 male and 7 female) of HFP and 50 non-HFP patients (35 female and 15 male) with allergic disorders, all from the Emergency Department of Ospedale Civile Maggiore in Verona.As expected, tryptase serum concentrations of most of the patients with allergic or anaphylactic disorders were increased above normal value (24.4+/-8.0 ng/mL mean+/-SD, normal value<11 ng/mL), whereas the tryptase serum concentrations of all the 10 patients with HFP were within the normal range (8.1+/-1.8 ng/mL).Our data suggest that tryptase serum concentrations can discriminate between the allergic and HFP syndromes. As the tryptase half-life is 90-120 min, blood samples must be taken 1-2 h from the beginning of symptoms.Finding a biomarker could help physicians to formulate a correct diagnosis and thus in choosing the best therapeutic strategy. In this work, we analyzed the role of tryptase serum concentrations to differentiate real allergic syndromes from the HFP syndrome, which causes similar histamine-mediated effects by a different mechanism
Efficacy of ketanserin in the therapy of Raynaud's phenomenon: thermometric data
No full textAfter a two-week washout (WO) period with placebo 1 capsule/bid, 12 patients suffering from stable Raynaud's phenomenon were treated with ketanserin (K) 40 mg/bid for fifteen days. Blood pressure, heart rate, and laboratory parameters were evaluated at the end of each period. Patients used diary cards to record the number, duration, and intensity of attacks. Computerized thermometry of the fingers was evaluated at basal temperature after acclimatization, 23 degrees C for thirty minutes; after cold test, 10 degrees C for five minutes; and after thermal recovery, 23 degrees C for eighteen minutes. Results were analyzed statistically by use of Student's t-test for paired data (p less than 0.05). No marked changes were observed in the symptoms of the attacks, but K proved effective in significantly reducing the number and duration of daily attacks and in promoting their spontaneous regression. Thermometry revealed a parallel increase in temperatures, particularly basal and recovery values. The data suggest increased flow and decreased vasospasm following 5-HT2 receptor blockade
Early function decline after ischemic stroke can be predicted by a nomogram based on age, use of thrombolysis, RDW and NIHSS score at admission
No full textThe availability of prediction tools for risk stratification after acute stroke is seen as a valuable perspective for tailored clinical management. This retrospective study was aimed to identify significant predictors of poor outcome in patients presenting with acute ischemic stroke, which could then be used for constructing a prediction model. The study population consisted of 837 patients admitted to the Stoke Unit of University Hospital of Verona (Italy) for acute ischemic stroke within 12 h of symptoms onset. In multivariate analysis, age, use of thrombolysis, red blood cell distribution width (RDW) and NIHSS score at admission were found to be significant predictors of 3-month functional decline. A nomogram constructed by integrating these four variables exhibited an area under the curve of 0.832 for predicting functional impairment. The >80% risk cut-off derived from the nomogram was associated with 0.91 positive predictive value, whereas a risk probability <10% displayed 0.93 negative predictive value for predicting functional impairment. These results demonstrate that a prediction tool integrating some important clinical, laboratory and demographic variables may enable an efficient risk stratification of poor outcome after acute stroke
- …
