Search results for "placement"
showing 10 items of 1142 documents
Effect of epicentral direction on seismic response of asymmetric buildings
1984
The paper deals with the influence of the epicentral direction on the displacement and stress response of multistorey asymmetric buildings to earthquake horizontal ground motion. A method is given for computing for each plane frame of the complex structure a particular direction of the bidirectional stationary random input for which the horizontal floor displacement of the given frame is maximized. It is shown that this direction can be considered conservative for the corresponding non-stationary process.
Zusammenhang zwischen postoperativer Liegedauer der Redon-Drainage und Wundheilung
1997
Es wurde bei 150 Patienten mit totalendoprothetischem Huftgelenkersatz der Einflus der postoperativen Liegedauer von Redon-Drainagen auf die Wundheilung untersucht. Eine genaue Analyse der Liegedauer der Drainagen sowie deren bakterielle Keimbesiedelung sollte unter Berucksichtigung des Wundheilungsverlaufs Aufschlus uber etwaige Zusammenhange verschaffen. Auserdem sollte uberpruft werden, inwieweit die Drainagenbakteriologie eine geeignete Methode ist, eine Aussage uber die Wundsituation zu treffen. 150 Patienten wurden in drei Kollektive eingeteilt. Zwei davon (je 50 Patienten) wurden im selben Zeitraum operiert, wobei die Patienten der einen Gruppe wegen einer Wundheilungsstorung bzw. ei…
Komplikationen der Redon-drainage each hüftgelenksersatzoperationen — eine analyse der ursachen
1989
Die Redon-Drainage hat die Operationsresultate entscheidend verbessert. Jedoch sind einige Komplikationen durch das Hochvakuum-System nicht zu verhindern, sie sind vielmehr sogar dadurch bedingt. Redon-Flaschen als Einwegprodukte entsprechen haufig nicht den gestellten Anforderungen. Es handelt sich nur um ein zeitweise “geschlossenes” System mit hohem Infektionsrisiko bei Flaschenwechsel. Nach Entwicklung einer vom Legen bis zum Ziehen der Drains stets geschlossenen Drainage wurden in einer prospektiven Studie nach Huftgelenksersatzoperationen verschiedene systembedingte Faktoren analysiert. Verglichen wurden die Redon-Hochvakuum-Drainage sowie ein kontinuierlich ansteigender Unterdruck bi…
Reconsidérer les mobilités quotidiennes en prenant en compte les habitudes individuelles
2019
Depuis quelques années, on constate dans la littérature un regain d’intérêt pour une analyse des habitudes lorsqu’elles concernent les mobilités quotidiennes (Brette et al., 2014 ; Schwanen et al., 2012). Par « habitude » il faut comprendre non pas la simple répétition de trajets, mais bel et bien un ensemble de savoir-faire acquis par l’expérience ou par l’éducation (Kaufmann, 2001). Par exemple, une personne ayant une forte habitude automobile, a tendance à automatiser (d’un point de vue cognitif) de plus en plus ses trajets quotidiens, à s’en détacher, pour associer à ses déplacements des activités plus ou moins « productives » (ex : envoyer des mails, des messages, téléphoner, regarder …
2020
This study aimed to explore the acute effects of static stretching on the musculotendinous properties of two hamstring muscles. Twelve male volunteers underwent two testing sessions. One session was dedicated to the evaluation of the semitendinosus muscle before (PRE) and after (POST) static stretching (five sets of 30-s stretching), and the other session similarly explored the long head of biceps femoris muscle. In addition to the displacement of the myotendinous junction (MTJ), passive torque and maximal voluntary isometric torque (MVIT) were evaluated. MVIT (−8.3 ± 10.2%, p = 0.0036, d = 0.497) and passive torque (−28.4 ± 16.9%, p = 0.0003, d = 1.017) were significantly decreased POST st…
Inverse Analysis Used to Determine Plastic Flow and Tribological Characteristics for Deep-drawing Sheet
2014
Abstract The present paper aims to develop a simple method based on inverse analysis that allows us to determine the laws of plastic flow coefficients and the friction coefficient between the material and punch. Selecting from different types of tests, we have chosen the Hecker test, because this test requires a single form of punch, the hemispherical one. In this test, the friction between the punch and the blank-sheet is caused by the blank-sheet strains and not by the movement it makes (as in deep drawing case). Besides the friction coefficient, other parameters like hardening and strength coefficients (n and k), influence the distribution of stresses and strains in the material. Using t…
The Symmetry and Predictive Factors in Two-Stage Bilateral Hip Replacement Procedures
2021
Background: Approximately 10–25% of total hip replacement patients undergo a bilateral procedure. The purpose of this study was to compare selected parameters associated with the first and second hip arthroplasty in patients undergoing two-stage treatment due to bilateral hip osteoarthritis and establish the predictive factors for the second procedure. Methods: This study compared the data on bilateral total hip replacement surgeries conducted in the period between 2017 and 2021 (42 patients). The following parameters from the first and second procedure were compared: the prosthetic stem, head, and insert cup size
Numerical simulation of transcatheter mitral valve replacement: The dynamic implication of LVOT obstruction in the valve-in-ring case.
2022
Transcatheter mitral valve replacement (TMVR) has been used for “off-label” treatment when annuloplasty band ring for mitral repair fails. However, the complex anatomy and function of the mitral valve may lead to fatal complications as a result of the left ventricular outflow tract (LVOT) obstruction in TMVR. We report the structural and hemodynamic response of LVOT obstruction resulting from TMVR with the Edwards SAPIEN 3 Ultra (S3) device. We modified the original Living Heart Human Model (LHHM) to account for a failed mitral valve with an annuloplasty band ring and simulated the cardiac beating condition in the setting of S3 device implantation. Findings demonstrated a high dynamic behav…
Impact of Prosthesis-Patient Mismatch after Mitral Valve Replacement
2016
Background and aim of the study: The study aim was to determine the impact of prosthesis-patient mismatch (PPM) on early and late clinical outcomes, left atrial and ventricular remodeling, late tricuspid valve regurgitation and pulmonary hypertension (PH) in patients after mitral valve replacement (MVR). Methods: A total of 46 patients (mean age 66 ± 9.3 years) with mitral valve diseases and undergoing isolated MVR was enrolled in the study. The mitral valve effective orifice area (EOA) was determined using the continuity equation and indexed for the patient’s body surface area (EOAi). PPM was defined as EOAi ≤1.2 cm2/m2. PH was defined as a systolic pulmonary artery pressure (sPAP) >40 mmH…
Preoperative evaluation before MitraClip®: present and future perspective.
2014
ABSTRACT Mitral regurgitation (MR) is the second most common heart valve disease worldwide. Currently, the management of MR is based on medical therapy (including biventricular pacing), surgery (mitral valve replacement or repair) and percutaneous therapy. However, in spite of guideline recommendations, 50% of individuals assessed in the Euro Heart Survey were not referred to surgical intervention due to comorbidities or real or perceived high risks for cardiac surgery; thus, in recent years, the focus of research has shifted to the development of percutaneous approaches to treat severe MR in order to restore valve function in a minimally invasive fashion. Among these techniques, the perc…