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- 저자 : Farah, Bashir (검색결과 165 건)
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Risk factors for early postoperative complications after bariatric surgery
Farah Husain,In Ho Jeong,Donn Spight,Bruce Wolfe,Samer G Mattar 대한외과학회 2018 Annals of Surgical Treatment and Research(ASRT) Vol.95 No.2
Purpose: Vertical sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB) are currently the most common bariatric procedures. Although the safety of these operations has markedly improved, there continues to be a certain rate of complications. Such adverse events can have a significant deleterious effect on the outcome of these procedures and represent a costly burden on patients and society at large. A better understanding of these complications and their predictive factors may help ameliorate and optimize outcomes. Methods: Seven hundred seventy-two consecutive patients who underwent SG or RYGB for morbid obesity between January 2011 and October 2015, in the Division of Bariatric Surgery at a tertiary institution, were included through retrospective review of the medical database. The complications were categorized and evaluated according to severity using the Clavien-Dindo classification system. Significant risk factors were evaluated by binary logistic regression to identify independent predictors and analyzed to identify their relationship with the type of complication. Results: Independent predictors of severe complication after these procedures included male gender, open and revisional surgery, hypertension, and hypoalbuminemia. Hypoalbuminemia had significant associations with occurrence of deep surgical site infection and leak. Open surgery had significant associations with occurrence of superficial and deep surgical site infection and respiratory complications. Independent predictors of severe complication after laparoscopic primary RYGB included previous abdominal surgery. Previous abdominal surgery had significant associations with deep surgical site infection and leak. Conclusion: Recognition and optimization of these risk factors would be valuable in operative risk prediction before bariatric surgery.
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Farah Jahan,Mohammad Khairul Islam,Joong-Hwan Baek 한국산학기술학회 2012 SmartCR Vol.2 No.1
The main goal of smart video surveillance is to develop an intelligent system in order to provide security to people and sensitive areas. Both person detection and tracking are challenging and crucial problems in intelligent video surveillance systems because a person"s body changes its shape while moving. Multiple camera-based visual surveillance systems can be extremely helpful in expanding a surveillance area and avoiding occlusion. To monitor a wide area of interest, re-identification of persons across multiple disjointed fields of view is crucial. In this paper we propose a novel method for detecting, re-identifying and tracking persons as they move between different disjointed camera views. We use color thresholding to detect the presence of moving objects and validate them for personhood by analyzing shape information. We generate a discriminative signature for each person based on their spatio-color appearance information in order to re-identify them. The spatio-temporal information as well as labels obtained by our re-identification method helps the system to keep track of persons. Our experiment demonstrates that the proposed approach works in real-time and demonstrates excellent detection, re-identification and tracking accuracy.
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Iterative Learning Control for Strictly Unknown Nonlinear Systems Subject to External Disturbances
Farah Bouakrif 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.4
This paper deals with Iterative Learning Control ILC schemes to solve the trajectory tracking problem of strictly unknown nonlinear systems subject to external disturbances, and performing repetitive tasks. Two ILC laws are presented, the first law is the high order, i.e., the information (error) of several iterations are used in the control law. The second law is the ILC with forgetting factor, i.e., the control of the preceding iteration is multiplied by a matrix of the gains. Indeed, the advantage of these algorithms, it is not only applicable for nonlinear systems with model uncertainty, but also for nonlinear systems with no data exists, neither in the structure model nor in the system parameters. In addition, the control design is very simple in the sense that there is no requirement on the choice of the learning gains. Furthermore, the convergence of our algorithms is independent of initial conditions. The asymptotic stability of the closed loop system is guaranteed. This proof is based upon the use of a Lyapunov-like positive definite sequence, which is shown to be monotonically decreasing under the proposed control schemes. Finally, simulation results on nonlinear system are provided to illustrate the effectiveness of the proposed controllers.
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The Role of Titanium Particles and Ions in the Pathogenesis of Peri-Implantitis
Farah Asa'ad,Peter Thomsen,Marcel F. Kunrath 대한골대사학회 2022 대한골대사학회지 Vol.29 No.3
Titanium (Ti) particles and ions have been investigated in recent years as important fac- tors in the pathogenesis of peri-implantitis. However, their role in the pathogenesis is yet to be fully understood. A review of pertinent literature was performed in various da- tabases to determine the current position of Ti particles and ions role in the pathogene- sis of peri-implantitis. There are several in vitro, preclinical and clinical published studies that have addressed the role of Ti particles and ions in the pathogenesis of peri-implan- titis. These studies explored the effect of Ti particles and ions in the pathogenesis of peri- implantitis with respect to foreign body reaction, cellular response, epigenetic mecha- nisms, namely DNA methylation, and the oral microbiome. Studies have shown that the release of Ti particles/ions during implant insertion, early healing stages, late healing stages, and treatments during peri-implantitis might contribute to peri-implantitis through different mechanisms, such as foreign body reaction, cellular response, DNA methyla- tion, and shaping the oral microbiome by increasing dysbiosis. However, further studies are needed to elucidate the complex interactions between all these mechanisms and Ti particles/ions in the pathogenesis and progression of peri-implantitis.
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Farah N. Musharbash,Sang Hun Lee 대한척추신경외과학회 2023 Neurospine Vol.20 No.1
Objective: To present an innovative, modified endoscopic approach for foraminal/extraforaminal pathologies, to reduce postoperative dysesthesia (POD) following the conventional transforaminal endoscopic approach (the access angle more than 45° from the midline), since POD is one of the major documented disadvantages that may compromise patient satisfaction. Methods: We introduce a modified posterolateral technique, termed the intertransverse approach, utilizing a steeper access angle less than 25° through the intertransversarii muscle and the intertransverse space with expanding Kambin triangle via lateral facetectomy/foraminoplasty, to reduce dorsal root ganglion/exiting nerve root irritation under direct visualization and lower the incidence of POD. Consecutive patients undergoing endoscopic spine surgery via the intertransverse approach for foraminal and/or extraforaminal disc herniations or bony stenosis were retrospectively reviewed. Clinical outcomes were reviewed with the primary outcome being POD. Results: Twenty-two patients were included in the review. Patients showed significantly improved clinical outcomes (visual analogue scale leg and back pain and Oswestry Disability Index) postoperatively. There was a low rate of dorsal root ganglion (DRG)-related POD (9.1%, 2 of 22) that was minimal and resolved soon. Conclusion: The inter-transverse endoscopic approach is feasible for lumbosacral foraminal and extraforaminal decompression with significantly improved clinical outcomes and the added advantage of a low rate of DRG-related POD compared to traditionally reported rates in the literature for the conventional transforaminal approach.
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Hepatoprotective Activity of Methanol Extract of Melastoma malabathricum Leaf in Rats
Farah Hidayah Kamisan,Farhana Yahya,Noor Aisyah Ismail,Syafawati Shamsahal Din,Siti Syariah Mamat,Zalina Zabidi,Wan Noraziemah Wan Zainulddin,Norhafizah Mohtarrudin,Hadijah Husain,Zuraini Ahmad,Zainul 사단법인약침학회 2013 Journal of Acupuncture & Meridian Studies Vol.6 No.1
The present study aimed to determine the hepatoprotective activity of a methanol extract of Melastoma malabathricum leaves (MEMM) using two established rat models. Ten groups of rats (n=6) were given a once-daily administration of 10% dimethyl sulfoxide (negative control), 200mg/kg silymarin (positive control), or MEMM (50, 250, or 500mg/kg) for 7 days followed by induction of hepatotoxicity either using paracetamol or carbon tetrachloride. Blood samples and livers were collected for biochemical and microscopic analysis. Based on the results obtained, MEMM exhibited a significant (p<0.05) hepatoprotective activity against both inducers, as indicated by an improvement in the liver function test. These observations were supported by the histologic findings. In conclusion, M. malabathricum leaves possessed hepatoprotective activity, which could be linked to their phytochemical constituents and antioxidant activity; this therefore requires further in-depth studies.
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Farah, Ra'fat I. The Korean Academy of Conservative Dentistry 2019 Restorative Dentistry & Endodontics Vol.44 No.1
Objectives: It was the aim of this study to evaluate the effect of cooling water temperature on the temperature changes in the pulp chamber and at the handpiece head during high-speed tooth preparation using an electric handpiece. Materials and Methods: Twenty-eight intact human molars received a standardized occlusal preparation for 60 seconds using a diamond bur in an electric handpiece, and one of four treatments were applied that varied in the temperature of cooling water applied (control, with no cooling water, $10^{\circ}C$, $23^{\circ}C$, and $35^{\circ}C$). The temperature changes in the pulp chamber and at the handpiece head were recorded using K-type thermocouples connected to a digital thermometer. Results: The average temperature changes within the pulp chamber and at the handpiece head during preparation increased substantially when no cooling water was applied ($6.8^{\circ}C$ and $11.0^{\circ}C$, respectively), but decreased significantly when cooling water was added. The most substantial drop in temperature occurred with $10^{\circ}C$ water ($-16.3^{\circ}C$ and $-10.2^{\circ}C$), but reductions were also seen at $23^{\circ}C$ ($-8.6^{\circ}C$ and $-4.9^{\circ}C$). With $35^{\circ}C$ cooling water, temperatures increased slightly, but still remained lower than the no cooling water group ($1.6^{\circ}C$ and $6.7^{\circ}C$). Conclusions: The temperature changes in the pulp chamber and at the handpiece head were above harmful thresholds when tooth preparation was performed without cooling water. However, cooling water of all temperatures prevented harmful critical temperature changes even though water at $35^{\circ}C$ raised temperatures slightly above baseline.
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