Düzensiz Ölçekli Sierpinski Üçgeni SG(2,3) Üzerindeki İçsel Metrik

Bu çalışmada, fraktal geometrinin en önemli nesnelerinden biri olan Sierpinski üçgeninin bir genellemesi olarak düşünebileceğimiz düzensiz ölçekli bir Sierpinski üçgeni olan SG(2,3) üzerindeki içsel metriğin bir ifadesi kümenin noktalarının bu kümeye has kod temsilleri yardımıyla ifade edilmiştir

Model-based testing in practice: An experience report from the web applications domain

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Cementless modular total hip arthroplasty with subtrochanteric transverse shortening osteotomy for high hip dislocations

Background: Performing a total hip arthroplasty for a high hip dislocation is technically demanding and presents several challenges, with appropriate evaluation of the bone morphology of the hip and proper implant selection being critical for successful outcomes. Objective: The purpose of our study was to evaluate the clinical and radiographic outcomes of cementless modular total hip arthroplasty for the treatment of high hip dislocations with sub-trochanteric transverse shortening osteotomy. Methods: Sixty-eight hips with a high hip dislocation, were treated using a sub-trochanteric transverse shortening osteotomy and cementless modular total hip arthroplasty, retrospectively reviewed. Hip function was assessed using the Harris hip score, with hip abduction strength evaluated using the Trendelenburg test. Radiographic assessment included the measurement of leg length discrepancy, identification of implant loosening, localization of the hip center, and union at the osteotomy site. Results: The mean follow-up period was 12.9 (range 5.2–16.8) years. The mean Harris hip score improved from a pre-operative score of 48.6 ± 3.6 to 82.4 ± 4.2 (p < 0.05). The hip was within the true acetabulum in all patients, postoperatively. Osteotomy union was achieved in 67 of the 68 hips (98.5%) in a mean latency of 12.5 ± 0.6 weeks. The mean length of femoral shortening was 66.5 ± 4.5 mm, with a mean pull-down length of the proximal part of 35.5 ± 3.5 mm. Conclusion: For the treatment of high hip dislocations with satisfactory clinical outcomes, the modular stem offers an adjustable anteversion angle to restore sufficient rotational stability and the transverse osteotomy provides sufficient compression pressure across the osteotomy site to facilitate union. Trial registration It was a retrospective study and approved by Istanbul Research and Training Hospital institutional Ethics Review Board (772-05/02/2016)

Evaluation of Left Ventricular Function by Conventional Echocardiography and Tissue Doppler Imaging in Patients with Acute and Chronic Mitral Regurgitation

Left ventricular function is affected differently in acute and chronic mitral regurgitation (MR). Twenty-six patients (12 men and 14 women, average age: 55±20 years) with acute severe MR caused by flail leaflet and 30 patients with chronic severe MR of organic origin (14 men and 16 women, average age: 56±14 years) were included in the study. All of the patients were evaluated in detail by conventional echocardiography and tissue Doppler imaging (TDI). Among conventional echocardiographic parameters, left ventricle ejection fraction (%) was found higher in acute MR (71±5/59±12, p=0.001) whereas left ventricle end-systolic volume, left ventricle end-diastolic volume, left ventricle end-systolic diameter, left ventricle end-diastolic diameter, left atrium dimension, and left atrial area were significantly higher in chronic MR. Among TDI parameters, peak systolic wave velocities (11.4±3.6/8.8±2.5cm/s, p=0.018), peak early diastolic velocities (10.8±4.5/9.3±3.8cm, p=0.03), and contraction time (248±56/219±47ms, p=0.04) were found higher in acute MR, whereas precontraction time (119±29/164±48ms, p=0.005) and precontraction time to contraction time ratio (0.52±0.23/0.78±0.28, p=0.008) were significantly higher in chronic MR. As evaluated by conventional echocardiography, the systolic function of chronic MR was also normal, although it was lower than that of acute MR. We also found that left ventricular systolic and diastolic functions by TDI were also relatively preserved in patients with acute MR when compared with those with chronic MR

Paradoxical para-hisian pacing response

Para-Hisian pacing (PHP) is among the most useful maneuvers in cardiac electrophysiology during sinus rhythm and identifies whether retrograde conduction is dependent on the atrioventricular (AV) node. In this maneuver, the retrograde activation time and pattern are compared during capture and loss of capture of the His bundle while pacing from a paraHisian position. A common misconception about PHP is that it is useful only for septal accessory pathways (APs). However, even with left or right lateral pathways, as long as pacing from the para-Hisian region conducts to the atrium with the activation sequence being analyzed, it can be used to determine whether that activation is AV node–dependent or AP-dependent

Investigation of pedobarographic parameters in individuals with obstetric bracial plexus paralysis

Çalışmanın amacı Obstetrik Brakial Pleksus Paralizi (OBPP)'li bireylerde yürüme sırasındaki ayak taban basıncı verilerini analiz etmektir. OBPP'ye sahip 19 birey araştırmaya dahil edildi. Bireylerin öncelikle Mallet skorları ölçüldü ve Ayak Postür Skoru kullanılarak statik ayak postür muayenesi yapıldı. Sonra Win-Track® pedobarografi cihazı kullanılarak yürüme sırasındaki ayak taban basıncı analiz edildi. Etkilenmiş ve sağlam taraf ayaklar arasında Ayak Postür Skoru değerlendirmesinde anlamlı fark görülmedi (p>0.05). Etkilenmiş kolun, ipsilateral ve kontralateral ayak F1, adım uzunluğu ve salınım öncesi fazı süresi ((Ts-T3)/Ts) analizinde, ipsilateral taraf verileri istatistiksel olarak anlamlı yüksek bulundu (p0.05). İpsilateral-Kontralateral F1, F2 ve Fmax asimetri indeksi değeri ile Mallet skoru negatif korelasyon bulundu (p0.05). Sonuç olarak OBPP'li bireylerde kol fonksiyon etkileniminin yürüme sırasındaki parametrelerde bir asimetriye sebep olduğu görüldü. OBPP'li bireylerin değerlendirme ve tedavisinde üst ekstremitenin yanında yürüme ve alt ekstremitenin de göz önünde bulundurulmasının yararlı olabileceği kanısına varıldı.The aim of the study was to analyze the soles of the foot pressure during walking in individuals with Obstetric Brachial Plexus Paralysis (OBPP). Nineteen individuals with OBPP were included in the study. First of all, Mallet scores were measured and static posture examination was performed using Foot Posture Score. The foot sole pressure during walking was then analyzed using the Win-Track® pedobarography device. There was no significant difference between the affected and intact feet in the evaluation of the Foot Posture Score (p>0.05). In ipsilateral and contralateral foot F1, step length parameters and pre-swing phase duration ((Ts-T3) / Ts) analysis of the affected arm, ipsilateral side data were found to be significantly higher (p0.05). It was found that while Ipsilateral-Contralateral F1, F2 and Fmax asymmetry index values increased, Malllet score decreased (p0.05). As a result, it was observed that arm function effect in individuals with OBPP caused an asymmetry in walking parameters. It was concluded that walking and lower extremity should be considered in the evaluation and treatment of individuals with OBPP