hybrid-procedure

Top PDF hybrid-procedure:

Hybrid procedure to treat aortic arch aneurysm combined with aortic arch coarctation and left internal carotid artery aneurysm (Case Report)

Hybrid procedure to treat aortic arch aneurysm combined with aortic arch coarctation and left internal carotid artery aneurysm (Case Report)

Standard treatment for aortic arch aneurysm is open sur- gery, due to its good long term results [7,8]. But surgical repair of the aorta requires thoracotomy, cardiopulmonary bypass, hypothermic circulatory arrest, aortic crossclamp- ing and systemic heparinization. Conventional surgical repair for aortic arch pathology carries a high mortality and morbidity, with a particularly significant incidence of neurologic injury [1,6,9]. Therefore they were gradually re- placed by endovascular treatment due to the complexity of the surgery, surgical trauma and high associated mortal- ity rate. Endovascular treatment is less invasive and is as- sociated with lower morbidity and mortality [3-5]. Since endovascular procedure does not require thoracotomy, circulatory assistance is not necessary and significant hae- morrhages are less likely. What is more, endovascular intervention does not need aortic cross-clamping as such the risk of cerebral, spinal cord and visceral ischemia was decreased. Due to the lower morbidity and mortality rates, thoracic endovascular aortic repair (TEVAR) is considered an acceptable alternative to open surgical repair for pa- tients with various types of aortic diseases. With the successful experience including ours, using of a fenes- trated or branched stent graft and double chimneys, which is able to preserve perfusion of the supra-aortic arch ves- sels, could be one of the alternative approaches [10,11]. However, simple application of TEVAR to treat aortic arch aneurysm combined with aortic arch coarctation and LICA aneurysm such as our case may cause cerebral ischemia and infarction. In this case, the aortic arch aneurysm lo- cated at the greater curvature, combining with aortic arch coarctation and LICA aneurysm, and the LSA was arising from the aortic arch aneurysm. Endovascular therapy could not repair all the lesions; however, conventional open sur- gery would be complicated and have high associated mor- tality rate, so hybrid procedure was a good alternative approach. Because of the dominant right vertebral ar- tery, we could occlude the LSA but without causing cerebral ischemia or cerebral infarction. But if the pa- tient presents with left arm ischemia, a subclavian to subclavian artery or axillary to axillary artery graft bypass could be performed. Although there was a very mild stenosis of LICA and aortic arch at 8-month post- operatively, but the patient does well without any com- plaints and complications. Our successful experience in this patient suggests that the combined endovascular and surgical treatment seems to be a valuable thera- peutic alternative when treating this type of aortic arch lesion with advantages of performing less aggressive surgery and avoiding aortic cross-clamping, circulatory assistance and high dose heparinization. But long-term follow-up of a larger number of patients is needed to assess and confirm these favorite results in order to pro- mote these approaches.
Show more

5 Read more

Comparison of hybrid procedure and open surgical revascularization for multilevel infrainguinal arterial occlusive disease

Comparison of hybrid procedure and open surgical revascularization for multilevel infrainguinal arterial occlusive disease

Our study population included 107 patients with sig- nificant comorbid risk factors who predominantly presented with CLI. Despite the nonrandomized nature of this study, the two groups undergoing OPEN or HYBRID were well matched for most risk factors, TASC classification, and other salient clinical variables. However, the patients who under- went OPEN were much older and presented with more New York Heart Association class III–IV status than HYBRID patients, which might be explained by our preference to treat old patients with poor conditions by HYBRID, rather than OPEN. The immediate results, including technical success, ABI and clinical status improvement, and mortality rates were similar between two groups, but with a higher total perioperative morbidity rate and a longer length of stay in OPEN patients compared with HYBRID patients. Analysis of late results showed that the OPEN group had higher primary, assisted primary, and secondary patency at 3 years than OPEN groups but did not show any statisti- cally significant difference, which means patency rates after the hybrid procedure could compete with those with open reconstructive surgery in this cohort. It is important to note that the patency rates in our patients are comparable to those in the literature, 5 although it is very difficult to make
Show more

9 Read more

Hybrid Procedure Utilizing Stent Grafts to Stabilize Distal Flaps after Common and Superficial Femoral Endarterectomy

Hybrid Procedure Utilizing Stent Grafts to Stabilize Distal Flaps after Common and Superficial Femoral Endarterectomy

Background: Endarterectomy has long been the standard for common femoral artery (CFA) occlu- sive disease. Hybrid procedures utilizing endovascular and open techniques have recently been used for revascularization. The purpose of this study was to evaluate the effectiveness of the use of a stent graft to stabilize the distal flap and prevent further dissection after extensive endarte- rectomy. Methods: All patients from Monmouth Medical Center in Long Branch, NJ from September 2008 to March 2013 who underwent an extensive common and superficial femoral (SFA) endar- terectomy combined with the use of a Viabahn (Gore Medical) stent graft to stabilize the distal flap were included in the study. These stents were deployed in the proximal SFA after extensive en- darterectomy, under direct visualization, without the aid of fluoroscopy. Due to the location in the SFA, these flaps were not amenable to suture tacking. Results: Fifteen patients met these criteria and were included in our study. Twelve patients underwent femoral endarterectomy for severe claudication and three patients for limb salvage. Technical success was achieved in all 15 patients. Five patients also had stents placed proximally to increase inflow and one patient had an addi- tional stent placed distally to improve outflow. There were no intraoperative or postoperative complications. Conclusion: Stent graft placement allows a more extensive endarterectomy to be performed by stabilizing the distal flap allowing a safe transition into the true lumen that is not possible with suture tacking.
Show more

7 Read more

Hybrid Procedure For Multi-Publicity Picture Fusion Headquartered Completely On Weighted Imply And Sparse Illustration

Hybrid Procedure For Multi-Publicity Picture Fusion Headquartered Completely On Weighted Imply And Sparse Illustration

making use of weighted imply and sparse illustration, respectively. The small print imply edges, nearby contrasts, and textures. Due to the weighted mean process, the ensuing usual pics are visually usual. For fusion of detail accessories, we use the proposed selection procedure (which includes sparse illustration) to preclude blurs and results of saturation regions. Because of the proposed fusion, the ensuing details have sharp edges and textures. As a result, the proposed approach produces excellent fused photographs with out artifacts, and we exhibit that the proposed process outperforms previous approaches through simulations objectively and perceptually. We count on that the object alignment is already completed by means of prior approaches in this paper, due to the fact the a few alignment ways have been proposed, and exhibit their efficacy [2, 18]. These days, tasks for multi-publicity photo fusion will have to be divided to be easy solved. For that reason, to show an efficacy of the proposed system for the fusion, we take the belief in this paper.
Show more

8 Read more

Long-term result of hybrid procedure for an extensive thoracic aortic aneurysm in Takayasu arteritis: a case report

Long-term result of hybrid procedure for an extensive thoracic aortic aneurysm in Takayasu arteritis: a case report

In cases with multiple adjacent aneurysms, a single-step procedure is theoretically possible, but because of exces- sive invasiveness, surgical outcomes may be poor [2,3]. According to a report by the Japanese Association for Thoracic Surgery, the hospital mortality rate after arch- descending aortic replacement is significantly worse than after TAR (14.3% vs. 6.5%, p < 0.001)[2]. Kouchou- kos et al [3] performed single-stage repair using a clam- shell incision in 46 patients and reported hospital death in only 3 patients (6.5%). However, 17% required a rethoracotomy for hemostasis, and other complications in survivors were reported, including mechanical ventila- tion for 72 hours or more in 42% (tracheotomy in 13%), and transient cerebral ischemia in 13%. On the other hand, when multistage surgery is selected to reduce sur- gical invasiveness, the surgical priority of multiple
Show more

5 Read more

Inhibitory motor control in old age : evidence for de automatization?

Inhibitory motor control in old age : evidence for de automatization?

The present study employed a hybrid procedure combining the Simon task with the masked prime task to investigate both high- and low-level inhibitory control processes and their interac[r]

10 Read more

A way for constructing hybrid methods with high order of accuracy and their application to solving of ode of first order

A way for constructing hybrid methods with high order of accuracy and their application to solving of ode of first order

p , although the application of the trapezoid method is simpler than applying a hybrid procedure. Using the Euler explicit method in place of the predictor method, one can construct a predictor-corrector scheme for the practical application of the trapezoid method. Remark, that for constricting stable methods with the degree p  2 k  2 one can be used multistep methods with the second derivatives (see, for example Kobza (1975), Areo et al. (2008), Dahlquist (1959), Ibrahimov (2002), Mehdiyeva et al. (2012), Mehdiyeva et al. (2013), Sekar et al. (2011).
Show more

8 Read more

Incompressible Flow and Heat Transfer over a Plate: A Hybrid Integral Domain Discretized Numerical Procedure

Incompressible Flow and Heat Transfer over a Plate: A Hybrid Integral Domain Discretized Numerical Procedure

A robust numerical algorithm involving an element-driven hybridization of the boundary integral theory has been applied to the solution of the energy equation for physical relevant flows of the Falkner-Skan equation. To this author’s knowledge, this is probably one of the few times such an approach is taken for this type of problem. By relying on this hybrid numerical technique, we report highly accurate numerical results without resorting to complex numerical integrations. There are a few issues to emphasize here. First the hybrid procedure permitted Equation (10) to be solved in a 1-D domain. There is no need to seek or device an equivalent analog of the same problem in a 2D domain as would be the case for a classical application of the Boundary Element Method (BEM). Such a transformation will give a false sense of accuracy, because the rigor incurred in order to achieve a BEM domain-reduction is more often than not compensated for by accuracy. The second point is that by deal- ing directly with such problems without an undue resort to approximations and by discretizing the problem do- main we open the door for handling problems involving heterogeneity and nonlinearity (Onyejekwe and Onye- jekwe [18], Onyejekwe [19]). The overall significance of our investigation is that it opens the chapter on the de- velopment of highly accurate hybrid boundary integral numerical algorithms for boundary layer flows involving similarity transformations. There is still a paucity of information in this field for boundary layer numerical solu- tions involving similarity transformations.
Show more

14 Read more

Simulation optimization based ant colony algorithm for the uncertain quay crane scheduling problem   Pages 111-132
		 Download PDF

Simulation optimization based ant colony algorithm for the uncertain quay crane scheduling problem Pages 111-132 Download PDF

application on the Italian Gioia Tauro terminal. In (Wang & Kim, 2011), the QCSP was combined with yard management problem with the aim of minimizing the time spent by vessels in the port and minimizing the difference of workloads between yard blocks. The problem was solved by a GRASP meta-heuristic. New benchmarks for the QCSP were proposed by Meisel and Bierwirth (2011), these instances tests provide 400 sets ranging from 10 to 100 tasks and 2 to 6 cranes. They were widely used in some recent works by (Kaveshgar et al., 2012), (Unsal and Oguz, 2011), (Chen et al., 2014) and (Rouky et al., 2015). In the work of Nguyen et al. (2013), hybrid evolutionary computation approaches based on Genetic Programming and Genetic Algorithm were proposed to address the QCSP. Computational results demonstrated that the proposed methods perform as well as the existing methods, and that they were able to obtain better solutions than the best known ones in many instances.
Show more

22 Read more

The Hybrid Genetic Algorithm for Solving Scheduling Problems in a Flexible Production System

The Hybrid Genetic Algorithm for Solving Scheduling Problems in a Flexible Production System

Some authors have thought that the simulation can be regarded as a scheduling approach in FMS. Basnet and Mize [12] described the methodology of scheduling under different categories: mathematical programming, multi-criteria decisions, oriented heuristics, the theoretical verification, simulation and artificial intelligence. Joseph and Sridharan [13] reported that scheduling in FMS could be classified into analytical methods, heuristics, simulation, expert systems / artificial intelligence techniques and hybrid methods. The classification proposed by Balogun and Popplewell [14] distinguishes several categories based scheduling in FMS, combinatorial optimization, priority rules based on the simulation oriented heuristics, multi-criteria decision, hybrid methods and techniques artificial intelligence represented by several categories such as expert systems, neural networks, genetic algorithms and other techniques from artificial intelligence.
Show more

8 Read more

Simultaneous Control of Artificial Limbs Based On Hybrid Extreme Learning Machine Algorithm

Simultaneous Control of Artificial Limbs Based On Hybrid Extreme Learning Machine Algorithm

Extended this work to include classification approach based on the procedure of artificial neural network especially we apply hybrid extreme leaning machine (HELM) for pattern recognition to identify the motion of limbs and compare with existing topologies. The proposed HELM work well than benchmark topologies methods since it is performed based on the machine learning approach. The definitive objective of this paper is to examine the correctness of simultaneous over sequential control approach rely on myoelectric pattern identification. In this paper is varied from existing methods since the proposed work combines the results of various classifiers to allow instantaneous predictions. To perform the proposed HELM methods in this work the data is collected between the 200 ms starts and improved between 50 ms time and four important features such as mean absolute value, zero crossings, slope sign changes, and wave length were extracted from input samples. Extracted four different features 11 different classes such as hand open/close, wrist flexion/extension, pro/supination, side grip, fine grip, agree or thumb up, pointer or index extension, and rest were identified and pattern recognized
Show more

7 Read more

Numerical modelling of obliquely incident guided wave scattering by a crack in a laminated composite plate

Numerical modelling of obliquely incident guided wave scattering by a crack in a laminated composite plate

applied to other crack shapes and delaminations in composites plates. The accuracy of the results obtained has been verified by checking the energy balance and the satisfaction of the elastodynamic reciprocity relations. It is found that the reflection and transmission coefficients are quite sensitive to the orientation and depth of the crack, the frequency and the incident wave mode number. This suggests that judicious choice of frequency and incident mode can be made to obtain optimum results from ultrasonic non-destructive testing of flaws. The hybrid formulation based finite element code developed here has the capability to investigate scattering of ultrasonic elastic waves by flaws over a wide range of the parameters involved. This enables one to perform a detailed parametric study of the scattering problem and the results of this study can be used to interpret untrasonic test measurements to characterize flaws.
Show more

8 Read more

Civil Procedure: Appellate Practice and Procedure

Civil Procedure: Appellate Practice and Procedure

Civil Procedure Appellate Practice and Procedure SMU Law Review Volume 63 | Issue 2 Article 9 2010 Civil Procedure Appellate Practice and Procedure LeDawn H Conway Devon D Sharp Follow this and additi[.]

13 Read more

Sample size determination for a binary response in a superiority clinical trial using a hybrid classical and Bayesian procedure

Sample size determination for a binary response in a superiority clinical trial using a hybrid classical and Bayesian procedure

While there has been much research in the area of Bayesian sample size determination [9–12], the hybrid classical and Bayesian method presented here aligns more with the ideas found in traditional frequentist sample size determination. Unlike traditional frequentist meth- ods, however, we do not assume that the true param- eters under the alternative hypothesis are known. This assumption rarely holds; typically, parameter values are estimated from early phase or pilot studies, studies of the intervention in different populations, or studies of

21 Read more

Hybrid debranching and TEVAR of the aortic arch off-pump, in re-do patients with complicated chronic type-A aortic dissections: a critical report

Hybrid debranching and TEVAR of the aortic arch off-pump, in re-do patients with complicated chronic type-A aortic dissections: a critical report

Following aortic surgical procedures, aneurysmatic dilatation of the residual aorta with the subsequent risk of rupture remains the main problem long-term. An important goal in resecting the (all) aortic tear(s) is the occlusion of the false lumen distal to the repair. However, in the majority of patients a chronically dissected false lumen within the distal aorta remains perfused [1,3]. As long as there is no clinical sign for organ malperfusion, ex- travasation of blood or signs for progression of dilation/ dissection no further intervention may be required. How- ever, the treatment of these secondary pathologies is chal- lenging, requiring major surgical intervention (aortic arch replacement, i.e. ‘frozen elephant trunk procedure’) with hypothermic circulatory arrest and selective antegrade cerebral perfusion. As redo procedures these interventions are associated with a high risk of bleeding, cerebral ische- mia/stroke, visceral malperfusion and death.
Show more

10 Read more

<p>Outcomes Of Chimney Technique For Aortic Arch Diseases: A Single-Center Experience With 226 Cases</p>

<p>Outcomes Of Chimney Technique For Aortic Arch Diseases: A Single-Center Experience With 226 Cases</p>

Several strategies, for instance, chimney technique, 2–4 hybrid technique, 5 fene- strated or branched stent-grafts, 6,7 have been reported as options to preserve the supra-aortic branches, each with its own advantages and disadvantages. The hybrid technique consists of various types of supra-aortic vessel debranching maneuvers. For patients with zone 0 pathologies, total aortic arch debranching with sternotomy is required. The clinical outcome of hybrid technique has large variation, with mortality and morbidity rates range from 2.0% to 23.7%, and 0.8% to 18.8%, respectively. 8,9 While some researches have reported favorable results with using fenestrated or branched stent-grafts in aortic arch diseases, these methodologies had limited applicability due to the morphological variety of the aortic arch, requiring tailor made and patient-speci fi c devices. Furthermore, the processes are
Show more

12 Read more

A Fast Hybrid WCIP and Fdtlm Approach to Study Inhomogeneous Circuits

A Fast Hybrid WCIP and Fdtlm Approach to Study Inhomogeneous Circuits

Abstract—The hybrid approach based on the coupling of the Wave Concept Iterative Procedure method and the Frequency Domain Transmission Line Matrix method is improved. The proposed method reduces the computation time by solving waves at the planar circuit interface: the volumic method is replaced by an equivalent surface condition. Thanks to this new approach, planar circuits presenting inhomogeneous dielectric substrates are studied. The proposed approach is compared to other methods on several examples.

8 Read more

of the riser response and empirical estimation of fatigue damage rates over the entire riser length

of the riser response and empirical estimation of fatigue damage rates over the entire riser length

Figure 3: The WWA procedure applied with twenty-three input sensors (sensor no. 4 is the target) for the NDP2350 (sheared current) data set: (a) PSDs of the strains measured at the twenty-three sensors; (b) Summation of the strain PSDs at each frequency and identification of the selected modes; (c) Strain PSD at the target sensor, reconstructed vs. measured; and (d) RMS curvatures, reconstructed vs. measured.

25 Read more

 INFORMATION TECHNOLOGY GOVERNANCE USING COBIT 4 0 DOMAIN DELIVERY SUPPORT 
AND MONITORING EVALUATION

 INFORMATION TECHNOLOGY GOVERNANCE USING COBIT 4 0 DOMAIN DELIVERY SUPPORT AND MONITORING EVALUATION

j column of the incidence matrix. The constraints (3) and (4) ensure that each part and each machine must be assigned to only one cell. The constraints (5) and (6) indicate that each cell contains at least one part and one machine. The constraints (7) and (8) indicate that decision variables are binary. In the computational experiments, the number of cells, denoted C, was fixed for each problem to its value in the best-known solution reported in the literature. Our solution approach deals with a 0-1 programming problem. It is considered as hybrid metheuristic. This hybrid metaheuristic includes a population based procedure as well as a local search algorithm. The proposed hybrid metaheuristic is in line with the discrete gravitational search algorithm (DGSA) proposed in [1]. As the hybrid metaheuristic is referring to the swarm procedure gravitational search algorithm (GSA), we should first summarize this swarm procedure.
Show more

11 Read more

Fast Nonlinear SSI Analysis Using A Hybrid Time-Complex Frequency Domain Approach

Fast Nonlinear SSI Analysis Using A Hybrid Time-Complex Frequency Domain Approach

The presented results validate the proposed nonlinear SSI hybrid approach against the “true” nonlinear time integration approach. The nonlinear SSI hybrid approach results were also compared favourably with the results obtained by the SwRI research studies on the nonlinear behaviour of stiff concrete structures, such as nuclear structures. The nonlinear SSI hybrid approach based on an iterative linearized FEA solution in complex frequency appears to be tens to hundreds of times faster than the “true” nonlinear SSI analysis based on the time-integration approach for identical computer platforms. In addition, the hybrid approach is much more robust than the time-domain nonlinear approaches using the direct integration that are often overly noisy and overly sensitive to small input parameter variations.
Show more

10 Read more

Show all 10000 documents...