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    Wyświetlanie 1-4 z 4
    Tytuł:
    Energy efficiency – selected thermo-ecological problems
    Autorzy:
    Ziębik, Andrzej
    Stanek, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/239928.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy efficiency
    system analysis
    exergy
    thermo-ecology
    energy ecological
    efficiency
    Opis:
    The paper is devoted to some problems connected with last modification of EU directive on energy efficiency, viz.: free choice of the measure concerning the improvement of energy efficiency, i.e. final or primary energy consumption, corresponding energy savings or energy-consumption index; however without cumulative consumption or cumulative savings of primary energy. In EU directive it has been stressed the importance of measurements systems (reliable measurement information); but has not been recommended any advanced validation of measurements results, nor energy auditing or algorithms of calculating the energy savings due to improvement of energy efficiency concerning large industrial plants. Evaluation of complex buildings should be realized by means of the system method (input-output analysis). The separate problem is devoted to application of thermo-ecological approach in the analysis of complete results of improving the energy efficiency. Human activity is connected with the depletion of nonrenewable resources, including primary energy, due to not only production of consumer goods but also the necessity of compensating the unfavourable effects of harmful emissions from energy-technological processes. Therefore the index of energy-ecological efficiency has been proposed as the most competent evaluation of improvement energy efficiency of production processes and systems.
    Źródło:
    Archives of Thermodynamics; 2020, 41, 2; 277-299
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laparoscopic gastric resections with per oral specimen extraction in treatment of intramural gastric tumors
    Autorzy:
    Stanek, Maciej
    Major, Piotr
    Wierdak, Mateusz
    Pędziwiatr, Michał
    Radkowiak, Dorota
    Zychowicz, Anna
    Budzyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1393418.pdf
    Data publikacji:
    2017
    Wydawca:
    Index Copernicus International
    Tematy:
    laparoscopy
    gastrointestinal stromal tumors
    POSE
    endoscopy
    Opis:
    Aim: The goal of this work was to present our experiences and results of treatment of gastric tumors using the per oral specimen extraction (POSE) technique. Material and methods: A retrospective analysis a group of patients treated with laparoscopic stomach wedge resection of gastrointestinal stromal tumor (GIST). During that time 50 patients underwent laparoscopy due to the suspicion of GIST. In 12 patients resected material was removed endoscopically per os (POSE). In the remaining 38 subjects it was evacuated through minilaparotomy. Mean age of patients treated using POSE technique was 65.6 years (48-81 years). There were 9 women and 3 men in this group Results: Mean time of the POSE procedure was 92.5 min (40-160 min). Size of removed tumors ranged from 14 mm to 40 mm (mean: 25 mm). The mean length of hospital stay was 3.2 days (2 to 8 days) for patients treated with POSE. One patient (8.3%) required longer hospitalization (8 days) due to the presence of a fluid collection at the site of gastric suture. This patient was treated conservatively. One patient (8.3%) was diagnosed with surgical site infection (navel wound after an optical trocar). Histopathological examination confirmed radical excision in all of our patients (R0). Conclusions: It seems that the POSE technique is the next stage of development of minimally invasive surgery and may constitute a link in evolution of natural orifice translumenal surgery techniques. Removal of excised material through oral cavity is an attractive, effective, and safe method despite its many limitations.
    Źródło:
    Polish Journal of Surgery; 2017, 89, 1; 16-21
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of bariatric surgery on non-alcoholic fatty liver disease
    Autorzy:
    Major, Piotr
    Pędziwiatr, Michał
    Rubinkiewicz, Mateusz
    Stanek, Maciej
    Głuszewska, Anna
    Pisarska, Magdalena
    Małczak, Piotr
    Budzyński, Andrzej
    Budzyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/1393188.pdf
    Data publikacji:
    2017
    Wydawca:
    Index Copernicus International
    Tematy:
    non-alcoholic fatty liver disease
    bariatric surgery
    morbid obesity
    Opis:
    Introduction; p to 300 million people have the body mass index (BMI) greater than 30 kg/m2. Obesity is the cause of many serious diseases, such as type 2 diabetes, hypertension, and non-alcoholic fatty liver disease (NAFLD). Bariatric surgery is the only effective method of achieving weight loss in patients with morbid obesity. Objectives: The aim of the study was to assess the impact of bariatric surgery on non-alcoholic fatty liver disease in patients operated on due to morbid obesity. Material and Methods: We included 20 patients who were qualified for bariatric procedures based on BMI > 40 kg/ m2 or BMI > 35kg/m2 with the presence of comorbidities. The average body weight in the group was 143.85kg, with an average BMI of 49.16kg/m2. Before the procedure, we evaluated the severity of non-alcoholic fatty liver disease in each patient using the Sheriff-Saadeh ultrasound scale. We also evaluated the levels of liver enzymes. Follow-up evaluation was performed twelve months after surgery. Results: Twelve months after surgery, the average weight was 102.34 kg. The mean %WL was 33.01%, %EWL was 58.8%, and %EBMIL was 61.37%. All patients showed remission of fatty liver disease. Liver damage, evaluated with ultrasound imaging, decreased from an average of 1.85 on the Sheriff-Saadeh scale, before surgery, to 0.15 twelve months after surgery (p < 0.001). As regards liver enzymes, the level of alanine aminotransferase decreased from 64.5 (U/l) to 27.95 (U/l) (p < 0.001), and the level of aspartate aminotransferase decreased from 54.4 (U/l) to 27.2 (U/l). Conclusions: Bariatric procedures not only lead to a significant and lasting weight loss, but they also contribute to the reduction of fatty liver disease and improve liver function.
    Źródło:
    Polish Journal of Surgery; 2017, 89, 2; 1-4
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A periampullary duodenal diverticula in patient with choledocholithiasis – single endoscopic center experience
    Autorzy:
    Major, Piotr
    Dembiński, Marcin
    Winiarski, Marek
    Pędziwiatr, Michał
    Rubinkiewicz, Mateusz
    Stanek, Maciej
    Dworak, Jadwiga
    Pisarska, Magdalena
    Rembiasz, Kazimierz
    Budzyński, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1393717.pdf
    Data publikacji:
    2016
    Wydawca:
    Index Copernicus International
    Tematy:
    choledocholithiasis
    digestive system endoscopic surgery
    diverticulum
    endoscopic retrograde cholangiopancreatography
    prevalence
    Opis:
    The reported prevalence of periampullary duodenal diverticula varies between 9 and 32.8%. The aim of the study was to evaluate the prevalence of periampullary diverticula in the studied population and establish whether their presence influence the risk of choledocholithiasis and the risk of Endoscopic Retrograde Cholangio Pancreatography (ERCP) related complications. Material and methods. The study group of 3788 patients who underwent ERCP between 1996 and 2016at the 2nd Department of General Surgery Jagiellonian University Medical College in Kraków were analyzed. The group comprised of 2464 women (mean age 61.7 years) and 1324 men (mean age 61.8 years). The patients were divided into two groups. Group A included patients in whom there were no periampullary diverticula detected. Group B included patients in whom the opening of the bile duct was in the vicinity of a duodenal diverticulum. Results. There were 3332 patients included in group A (2154 women and 1178 men) and 456 patients in group B (310 women and 146 men). The prevalence of periampullary duodenal diverticula in the analyzed group was 12.8%. The presence of stones or biliary sludge was diagnosed in 1542 patients (47.6%) in group A and 290 patients (68.1%) in group B. Recurrence of choledocholithiasis occurred in 4.5% of patients (70/1542) in group A and 10.3% of patients (30/290) in group B. Complications occurred in a total of 76 patients in group A (2.3%) and 22 patients in group B (4.8%). Conclusions. The presence of choledocholithiasis and the risk of ERCP related complications are significantly higher in the group with duodenal diverticula.
    Źródło:
    Polish Journal of Surgery; 2016, 88, 6; 576-586
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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