Median arcuate ligament syndrome (MALS) is a rare condition which is due to the compression of celiac trunk by low riding of fibrous attachments of median arcuate ligament and diaphragmatic crura. Technically, MALS is a diagnosis of exclusion, consisting of vague symptoms comprising of postprandial epigastric pain, nausea, vomiting and unexplained weight loss. Different imaging modalities like Doppler ultrasound, computed tomography, magnetic resonance imaging and mesenteric angiogram are helpful to demonstrate celiac axis compression. The goal of treatment is decompression of celiac trunk either by open, laparoscopic or robotic method along with adjuvant interventional procedures like percutaneous transluminal angioplasty (PTA) and stenting. Surgical is the mainstay of treatment. This approach is based on open, laparoscopic or robotic release of compressed ligament along with celiac ganglionectomy and celiac artery revascularization. The role of interventional radiology is limited to angioplasty and stenting to open the stenosis rather than addressing the underlying compression of celiac trunk which has resulted in the symptoms. However, both the diagnosis and therapeutic intervention remains challenging. Extensive evaluation of etiology and pathophysiology of MALS and addressing the same through minimally invasivetechniques may yield best prognosis in future. In this review article, we discuss briefly about the MALS in terms of etiology, diagnosis and its management including the role of interventional radiology.
There are several types of designs used for unicompartmental tibial components. The all-plastic inlay component is recessed and it preserves bone around the outer edge of the tibia. For an onlay component, the entire condyle is resected, and the plastic bearing is usually metal-backed, although all-plastic components are also available. The purpose of this study was to investigate the hypothesis that while 6-mm inlay components require less bone removal, the peak stresses and strains at the surface of the bone will be much greater when compared with 8-mm metal-backed onlay components, and that all-plastic onlays will be only a slight advantage over inlays. Tibial models were generated using computed tomography (CT) scans, while typical inlay and onlay components were modeled. Finite element analyses of bones and components were completed by assigning material properties based on the CT scans and applying loads. Results indicated that plastic inlays generated 6 times more peak stress at the tibial surface when compared with metal-backed onlays. Moreover, models using inlay components produced strain values exceeding onlay components by a factor of 13.5 due to areas of softer bone at the interface. Off-center loading toward the anterior or posterior of the components produced similar results. The stresses and strains for the 8-mm all-plastic onlay were reduced compared with the inlay but still much higher than for the metal-backed onlay. These findings indicated that metal-backed onlays may be a better option when considering load distribution on the tibial surface.
Background: Gallstone disease is a significant health problem world over (in both developing and developed nations). The incidence of gallstone disease increases after age of 40years and it becomes 4-10 times more common in old age. As many as 16% and 29% of women above the age of 40-49 years and 50-59 years, respectively, had gall stones. Laparoscopic cholecystectomy introduced in 1985 has become the procedure of choice for surgical removal of the gallbladder. The aim is to compare laparoscopic cholecystectomy and open cholecystectomy in patients of cholelithiasis by measuring parameters such as use of post-operative analgesia, operative time, post-operative hospital stays, morbidity, mortality and patient satisfaction.Methods: It is a prospective randomized study of 120 patients of cholelithiasis aged between 20years to 80years operated during 2015-2018 at of Anugrah Narayan Magadh Medical College and Hospital, Gaya, Bihar, India. They were divided into open and laparoscopic Cholecystectomy groups by drawing a lottery.Results: The median (range) operation time for laparoscopic cholecystectomy was 55-155 min (mean=102 min) and 40-105 min (mean=72 min) for open cholecystectomy (p <0.001). Form LC group 5 cases had to be converted to OC. Rate of conversion was 5/60=8.3% which is within limits of worldwide laparoscopic cholecystectomy conversion rate of 5% to 10%. LC was found to be superior to OC.Conclusions: Laparoscopic cholecystectomy is better than open cholecystectomy However, open cholecystectomy is preferable in cases of complicated cholecystectomy.
The areas of the most frequent cartilage loss in mild–moderate medial osteoarthritis (OA) were reviewed from previous studies. Implant components were designed to resurface these areas. The surface geometries of the components were based on an average femur and tibia produced from 20 magnetic resonance imaging (MRI) models of normal knees. Accuracy of fit of the components was determined on these 20 individual knees. The femoral surface was toroidal, covering a band on the distal end of the femur, angled inward anteriorly. For a five-size system, the average deviations between the implant surfaces and the intact cartilage surfaces of 20 femurs were only 0.3 mm. For the tibia, the deviations were 0.5–0.7 mm, but the errors were mainly around the tibial spine, with smaller deviations in the central bearing region. Hence, these small implant components would accurately restore the original bearing surfaces and allow for preservation of all the knee structures. Using a thin metal component for the tibia would preserve the strong cancellous bone near the surface, an advantage for fixation. In this case, the femoral component would have a plastic bearing surface, but still be less than 10 mm thickness. Such a design could have a useful place in the early treatment of medial OA of the knee.
There are two main designs used for unicompartmental tibial components. The first design, an all plastic component called an inlay, preserves bone on the outer edge of the tibia which is feasible using a robotically-controlled burring tool. Also, the depth of resection is small, preserving the strongest cancellous bone which is near the surface. The second design, called an onlay, resects the entire condyle and includes a metal backed plate which rests on the resected tibia. This component requires more bone removal but metal-backing has previously been shown to distribute the load more uniformly. The purpose of this study was to investigate the hypothesis that while inlay components require less bone removal, the peak stresses and strains at the surface of the bone will be greater when compared to onlay components.
A 3-year-old boy presented with the complaints of watery discharge from an opening in the right-hand side of neck on and off since birth. There was no history of trauma or operation.
Tibial component loosening is an important failure mode in unicompartmental knee arthroplasty (UKA) which may be due to the 6-8 mm of bone resection required. To address component loosening and fixation, a new early intervention (EI) design is proposed which reverses the traditional material scheme between femoral and tibial components. The EI design consists of a plastic inlay for the distal femur and a thin metal plate for the proximal tibia. With this reversed materials scheme, the EI design requires minimal tibial bone resection compared with traditional UKA. This study investigated, by means of finite element (FE) simulations, the advantages of a thin metal tibial component compared with traditional UKA tibial components, such as an all-plastic inlay or a metal-backed onlay. We hypothesized that an EI tibial component would produce comparable stress, strain, and strain energy density (SED) characteristics to an intact knee and more favorable values than UKA components, due primarily to the preservation of dense cancellous bone near the surface. Indeed, FE results showed that stresses in the supporting bone for an EI design were close to intact, while stresses, strains, and strain energy densities were reduced compared with an all-plastic UKA component. Analyzed parameters were similar for an EI and a metal-backed onlay, but the EI component had the advantage of minimal resection of the stiffest bone.
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