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Wyszukujesz frazę "sleeve" wg kryterium: Temat


Tytuł:
Single anastomosis sleeve ileal bypass (SASI) : a single-center initial report
Autorzy:
Binda, Artur
Jaworski, Paweł
Barski, Krzystzof
Wąsowski, Michał
Kudlicka, Emilia
Tarnowski, Wiesław
Jankowski, Piotr
Opis:
Single anastomosis sleeve ileal (SASI) bypass is a recently introduced bariatric procedure that combines the advantages of restrictive and malabsorptive operations, at the same time reducing the risk of nutrient deficiencies by maintaining passage through all the alimentary tract. To present the outcomes of the first group of patients that underwent the SASI bypass in our clinic and assess the safety and efficiency of the procedure. We analyzed patients qualified for SASI bypass between January 2020 and February 2021. Retrospective analysis was performed and outpatient treatment results were evaluated. A group of nineteen patients (18 women) underwent SASI bypass. The mean preoperative body mass index was 40.3 ±3.74 kg/m, mean age: 43.3 ±7.83. The mean excess weight loss (% EWL) after 3, 6, 9 and 12 months of follow-up was 43%, 56%, 72.5%, 88.83% respectively. Remission of obesity related diseases was as followed: hypertension in 8 patients (80%, p < 0.05), type II diabetes in 6 patients (100%, p < 0.05), pre-diabetes in 4 patients (50%, p = 0.13). Complications occurred in 4 cases: hematemesis, dysphagia, diarrhea, short bowel syndrome. A patient who developed symptoms of short bowel syndrome was reoperated on and gastrointestinal anastomosis was disconnected. Postoperatively, unwanted symptoms resolved and a good bariatric effect was preserved. Our first experience is consistent with that reported in previous studies: very good EWL and a rapid resolution of obesity related diseases after SASI bypass as well as safety of the procedure.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Impact of the sleeve thickness on the armature eccentricity in a solenoid valve
Autorzy:
Goraj, R.
Tematy:
solenoid valve
eccentricity
armature
sleeve
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/141681.pdf  Link otwiera się w nowym oknie
Opis:
Most studies on solenoid valves (SVs) assumed that the armature is concentrically positioned in the sleeve. Under this assumption the transversal component of the magnetic force is equal zero. The article presents an analytical calculation model for the estimation of the armature eccentricity. Using this model the eccentricity was calculated as a function of the sleeve thickness and the hydraulic clearance between the armature and the sleeve. After finding the eccentricity also the permeance of the radial air gap was calculated. This permeance has a direct influence on the drop of the magnetomotive force in the magnetic circuit and finally influences also the axial component of the magnetic force. In the article a calculation of both transversal and axial components of the magnetic force was carried out and presented in the appendix to the article.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laparoscopic sleeve gastrectomy for the treatment of diabetes mellitus type 2 patients-single center early experience
Autorzy:
Pędziwiatr, Michał
Wysocki, Michał
Małczak, Piotr
Pisarska, Magdalena
Budzyński, Andrzej
Major, Piotr
Opis:
Background: In recent years, laparoscopic sleeve gastrectomy (LSG) has become one of the most commonly used primary bariatric procedures for morbid obesity. While laparoscopic Roux-en-Y gastric bypass (LRYGB) has well documented positive clinical influence on type 2 diabetes, the role of LSG in diabetes treatment is debatable. The main aim of this study is to present our early experience in LSG as a method of bariatric treatment in patients with type 2 diabetes or abnormalities in glucose homeostasis. Methods: Prospectively collected data of patients operated for morbid obesity at the 2nd Department of Surgery. The study was designed to assess the influence of LSG on type 2 diabetes and glucose homeostasis. The primary endpoint was the diabetes type 2 remission. Secondary endpoint was the change of glucose metabolism parameters after LSG. Patients were assessed preoperatively and allocated to two groups: group 1—with any preoperative abnormalities in glucose homeostasis (prediabetes, diabetes) and group 2—with non-elevated fasting glucose level. During follow-up (6 months after surgery) all glucose homeostasis parameters were analyzed again. One hundred and thirty-six patients after LSG were enrolled in the study (90 females, 46 males; mean age 40.5±9.9 years). Preoperative abnormalities in glucose homeostasis were confirmed in 64 (47%) patients. Twenty (15%) patients in this group had diabetes. Results: We observed significant reduction of body mass index (BMI) after surgery. Mean percent of EBMIL for all groups after 6 months from surgery was 59.90% (46.75–69.28%). There were no full remissions after surgery in patients with preoperative diabetes. We found significant improvement in biochemical markers of glucose homeostasis. We observed significant reduction of HbA1c% after surgery in both groups. The level of postoperative HbA1c% was related to BMI loss after surgery. Conclusions: LSG leads to significant improvement in biochemical glucose homeostasis and can be considered as a method of treatment in morbidly obese patients with glucose metabolism abnormalities. LSG as a method of treatment for patients with clinical type 2 diabetes still needs some further observation.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Duodenal microbiota and weight-loss following sleeve gastrectomy and Roux-en-Y gastric bypass – a pilot study
Autorzy:
Zapała, Barbara
Gosiewski, Tomasz
Major, Piotr
Sroka-Oleksiak, Agnieszka
Zając, Maciej
Salamon, Dominika
Stefura, Tomasz
Pędziwiatr, Michał
Rusinek, Jakub
Opis:
Background Bariatric surgery is the most effective method of morbid obesity treatment. Microbiota has many functions in human body and many of them remain to be unknown. The aim of this study was to establish if the composition of duodenal microbiota influences success rate of bariatric surgery. Methods It was a prospective cohort study. The data concerning demographics and comorbidities was collected perioperatively. The duodenal biopsies were collected prior to surgery with the gastroscope. Then DNA analysis was conducted. The data connected to the operation outcomes was gathered after 6 and 12 months after surgery. Results Overall, 32 patients were included and divided into two groups (successful – group 1 and unsuccessful – group 0) based on percentage excess weight loss after 6 months were created. The Total Actual Abundance was higher in group 0. In group 0 there was a significantly higher amount of Roseburia and Arthrobacter (p = 0.024, p = 0.027, respectively). Genus LDA effect size analysis showed Prevotella, Megasphaera and Pseudorhodobacter in group 1 to be significant. Whereas abundance of Roseburia and Arthrobacter were significant in group 0. Conclusions Duodenal microbiota composition may be a prognostic factor for the success of the bariatric surgery but further research on the larger group is needed.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The influence of the engine load on the value and temperature distribution in dry cylinder sleeve
Autorzy:
Gustof, P.
Tematy:
numerical techniques
engine load
cylinder sleeve
FEM
Pokaż więcej
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Powiązania:
https://bibliotekanauki.pl/articles/247576.pdf  Link otwiera się w nowym oknie
Opis:
In this work the influence of the engine load on the value and temperature distribution in dry cylinder sleeve in turbocharged Diesel engine was definition. The computations were performed by means of the original two-zone combustion model, the boundary conditions of III kind and thefinite elements method (FEM) by using of COSMOS/M program. The characteristic surfaces of the cylinder sleeve were analyzed. The registered results of the computations get appointed on experimental measured parameters of the state of the engine work for the excess air number gamma = 1.66 and gamma = 3.08 and for the same engine speed n=2000 rpm. The computations were conductedfor initial 60 seconds of the engine work. On basis of received calculations it was determined that the increase of the engine load at the same engine speed causes the growth of the temperature of cylinder sleeve. Maximum temperature of the dry cylinder sleeve during 60 second of engine work carry out about 420 K for gamma, = 1.66 and 380 K for gamma = 3.08. Moreover the calculations show that top parts of the cylinder sleeve near of the mount flange heat up the most quickly and the temperature below the 3rd ring in outer dead centre of the piston is the lowest. The speed of increase temperature of dry cylinder sleeve is the largest in initial phase of warming up engine. After 10 seconds the average speed of increase temperature carries out about 8 K per second for larger load and about 5 K per second for lower load of the engine. Between 10 and 20 second the speed of increase temperature falls down and it starts stabilizing slowly.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk factors for early and late complications after laparoscopic sleeve gastrectomy in one-year observation
Autorzy:
Krętowski, Adam
Szczerbiński, Łukasz
Głuszczyńska, Paulina
Diemieszczyk, Inna
Razak Hady, Hady
Major, Piotr
Opis:
Background: Although laparoscopic sleeve gastrectomy (LSG) is considered a safe bariatric procedure in the treatment of obesity, it still involves a risk of developing postoperative complications. Knowledge of risk factors for possible complications would allow appropriate preoperative planning, optimization of postoperative care, as well as early diagnosis and treatment. The aim of this study was to evaluate risk factors for complications after laparoscopic sleeve gastrectomy. Methods: A retrospective study of 610 patients who underwent LSG at a tertiary institution were included in the study through retrospective analysis of the medical data. Complications were categorized as early (<30 days) and late (≥30 days) and evaluated according to the Clavien–Dindo Classification. Results: Early complications were observed in 35 patients (5.74%) and late complications occurred in 10 patients (1.64%). Independent risk factors of early complications after laparoscopic sleeve gastrectomy included hypercholesterolemia (OR 3.73; p-value = 0.023) and smoking (OR = 274.66, p-value < 0.001). Other factors that may influence the postoperative course are length of hospital stay and operation time. Smoking, peptic ulcer diseases and co-existence of hiatal hernia were found to be an independent predictors of late complications. Conclusions: Smoking is associated with the higher risk of both, early and late complications, while hypercholesterolemia with only <30 days complications after laparoscopic sleeve gastrectomy.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
LS-Dyna contact procedure analysis for selected mechanical systems
Autorzy:
Małachowski, J.
Bukala, J.
Damaziak, K.
Tomaszewski, M.
Tematy:
contact
finite element method
LS-DYNA
shaft
sleeve
Pokaż więcej
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Powiązania:
https://bibliotekanauki.pl/articles/245543.pdf  Link otwiera się w nowym oknie
Opis:
Finite Element Method is one of the most frequently used computational schemes in numerical analyses. A contact phenomenon is an essential issue when modelling the physical interaction between two or more bodies. Depending on the used software, the various contact algorithms are applied. In the paper, the authors present the results of evaluation of different contact methods implemented in LS-Dyna CAE software. The most common problem arising during contact modelling is the occurrence of penetration between the coupling elements, which leads to an increase of contact forces and, consequently, a local deformation of finite elements. In the introduction, a theoretical background related to mathematical aspects of contact modelling is presented, in particular search methods for contact surfaces and the penalty forces calculating method. Subsequently, a contact analysis for different variants of interaction of the elements is presented. In the first analysed case, shaft- sleeve interaction, in both rotation and translation, is presented. The variable factors in this case were a number of interacting finite elements and the type of a contact algorithm. The second case focused on the interaction forces resulting from the interaction between two sliding bodies in the harmonic motion. A sliding body was pressed against the plane using an increasing force. A variable factor in this case was the type of the implemented contact algorithm.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assembling of bearing sleeve on ship propulsion shaft by using EPY resin compound
Autorzy:
Grudziński, K.
Grudziński, P.
Jaroszewicz, W.
Ratajczak, J.
Tematy:
bearing sleeve
propulsion shaft
assembling
EPY resin compound
Pokaż więcej
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Powiązania:
https://bibliotekanauki.pl/articles/259011.pdf  Link otwiera się w nowym oknie
Opis:
This paper presents an original novel solution of the problem of assembling a large bearing sleeve (of about 1000 mm in diameter) on ship propulsion shaft by using EPY resin compound. The problem is discussed on the concrete example dealing with a ship under repair. Design project of assembling the sleeve on the shaft by using the resin compound, model research on its casting process as well as assembling technology of the sleeve on the shaft, are presented and a practical way of realization of the project in conditions of a Chinese ship repair yard, is also highlighted. During more than three-year-long operation the solution has standed the test of time without any complaint.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forced vibrations analysis of a conical sleeve-shaft friction joint
Autorzy:
Andrzejuk, A.
Skup, Z.
Zalewski, R.
Tematy:
conical joint
sleeve-shaft neck
energy dissipation
structural friction
Pokaż więcej
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Powiązania:
https://bibliotekanauki.pl/articles/279633.pdf  Link otwiera się w nowym oknie
Opis:
The paper presents a theoretical study of the damping process of non-linear vibrations in a one-mass model of a mechanical system over a friction joint. The problem is considered assuming a uniform unit pressure distribution between the contacting surfaces of the conical sleeve-shaft neck of the friction joint. The steady-state motion of the system is subject to harmonic excitation. The analysis includes the following: the influence of geometric parameters of the system, its external load amplitude, unit pressures and the friction coefficient upon the amplitude-frequency characteristics and the phase-frequency characteristics. Structural friction has been also taken into account. The equation of motion of the examined mechanical system has been solved by means of the slowly varying parameters (Van der Pol) method and a numerical simulation method.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wernickes Encephalopathy as Unexpected Cause of Vertigo for Otolaryngologist- A Case Report
Autorzy:
Yaseen, Ehab T,
Mohammed, Nawres Thamer
Jasim, Shems Hamza
Tematy:
ataxia
sleeve gastrectomy
thiamine
vertigo
VNG
Wernicke’s encephalopathy
Pokaż więcej
Wydawca:
Index Copernicus International
Powiązania:
https://bibliotekanauki.pl/articles/58928733.pdf  Link otwiera się w nowym oknie
Opis:
Background: The causes of vertigo are diverse, and the possible differential diagnosis is extensive. Thiamine deficiency after sleeve gastrectomy is one of the rare causes for vertigo, a condition called Wernicke’s encephalopathy. Case report: This is a case report of a 20-year-old female complaining of continuous vertigo for 2 months duration. She complained about ocular, lower limbs and Gastero-intestinal clinical features after undergoing sleeve gastrectomy. She was conscious but confused. Eye movement examination revealed horizontal and vertical nystagmus. She displayed signs of ataxia. VNG revealed Up-beating nystagmus in primary gaze, leftward gaze, and upward gaze when vision is accessible, and in upward gaze when vision is denied suggesting a central etiology. Lab. tests confirmed a low serum thiamine and Vit D levels. Low thiamine raises the suspicion of Wernicke’s encephalopathy. Within 72 hours of treatment, here vertigo and ataxia began to improve, and the nystagmus reduced significantly. Over the next few days, here balance and coordination greatly improved, and here mental state improved. Conclusion: This case underscores the significancy of considering Wernicke's encephalopathy in the differential diagnosis of vertigo, especially in patients with a history of bariatric surgery, regardless of age. It also emphasizes the need for prompt thiamine supplementation in such cases, as timely intervention along with supportive treatments can significantly improve patient outcomes. Otolaryngologists should maintain a broad perspective when diagnosing vertigo to ensure accurate and effective treatment.
Dostawca treści:
Biblioteka Nauki
Artykuł

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