Search

Your search keyword '"Ziaja D"' showing total 133 results
Start Over Author "Ziaja D"
133 results on '"Ziaja D"'

1. DIC in Validation of Boundary Conditions of Numerical Model of Reinforced Concrete Beams Under Torsion

Author

Turoń B., Ziaja D., Buda-Ożóg L., and Miller B.

Subjects
Digital Image Correlation, DIC, non-contact measurement, concrete, torsion, shear, Engineering (General). Civil engineering (General), TA1-2040
Abstract

The paper presents the experimental research and numerical simulations of reinforced concrete beams under torsional load. In the experimental tests Digital Image Correlation System (DIC System) Q-450 were used. DIC is a non-contact full-field image analysis method, based on grey value digital images that can determine displacements and strains of an object under load. Numerical simulations of the investigated beams were performed by using the ATENA 3D – Studio program. Creation of numerical models of reinforced concrete elements under torsion was complicated due to difficulties in modelling of real boundary conditions of these elements. The experimental research using DIC can be extremely useful in creating correct numerical models of investigated elements. High accuracy and a wide spectrum of results obtained from experimental tests allow for the modification of the boundary conditions assumed in the numerical model, so that these conditions correspond to the real fixing of the element during the tests.

Published
2018
Full Text
View/download PDF

4. The influence of Body Mass Index on chronic venous disorders therapy

Author

Jerzy Chudek, Kocełak P, Ziaja D, Owczarek A, and Ziaja K

Subjects
Adult, Male, Health Knowledge, Attitudes, Practice, Administration, Topical, Comorbidity, Severity of Illness Index, Body Mass Index, Veins, Risk Factors, Compression Bandages, Odds Ratio, Humans, Obesity, Vascular Diseases, Aged, Chi-Square Distribution, Cardiovascular Agents, Middle Aged, Cross-Sectional Studies, Logistic Models, Treatment Outcome, Health Care Surveys, Chronic Disease, Multivariate Analysis, Patient Compliance, Female, Poland, Vascular Surgical Procedures
Abstract

Obesity is of importance among the risk factors predisposing for chronic venous disorders (CVD). Little is known how obesity affects the management of CVD. As the data concerning the treatments of CVD in the obese are incomplete, we performed an analysis of the different CVD therapies managements with respect to body mass index and the obesity.We analyzed 9797 CVD patients from of a previous large national CVD survey, in regard to their Body Mass Index (BMI), CVD class and CVD therapies. Among them 2213 patients presented class I, 516 class II or morbid obesity.BMI was significantly associated with the method of CVD therapy. Logistic regression showed that venoactive drugs are preferentially used except in class I obesity patients but also when therapy is managed by general practitioner. Logistic regression analysis showed that class II and morbid obesity is associated with more frequent prevalence of previous surgical procedures related to CVD (OR=2.62 with 95% confidence interval of [2.16-3.17]) and topical agent use, (OR=1.77, [1.38-2.25]) but with a significant decreased compliance with compression therapy (OR=0.74, [0.61 - 0.89]), regardless of the clinical course of the disease, and socio-demographic factors. While class I obesity increased the adherence with VADs.The therapy of CVD is affected by body mass index. Class II and morbid obese CVD patients are less frequently compliant with compression therapy but are willing to accept surgical procedures and the use of topical agents.

Published
2013

5. Compliance in pharmacotherapy in patients with chronic venous disorders

Author

Chudek, J., Kocełak, P., Ziaja, D., Aleksander Owczarek, and Ziaja, K.

Subjects
Adult, Male, Analysis of Variance, Chi-Square Distribution, Administration, Topical, Cardiovascular Agents, Comorbidity, Middle Aged, Risk Assessment, Severity of Illness Index, Medication Adherence, Logistic Models, Venous Insufficiency, Risk Factors, Health Care Surveys, Chronic Disease, Odds Ratio, Humans, Drug Therapy, Combination, Female, Obesity, Poland, Stockings, Compression, Aged
Abstract

The aim of this study was to evaluate the factors that limit the use of venoactive drugs (VADs), especially in patient with chronic venous disorders (CVD) noncompliant with compression therapy in a nationwide survey.Analysis included 5134 CVD patients compliant with compression therapy and 4663 of those not accepting such method of therapy, participating in a large survey.Venoactive drugs (VADs) and topical agents were used significantly less frequently by patients noncompliant with compression therapy compared to the compliant population (95.2% vs. 97.7%, P0.001 and 70.1% vs. 79.9%, P0.001, respectively). There were also less patients on two VADs concurrently in these subgroups (14.6% vs. 24.6%, P0.001 respectively). Logistic regression analysis confirmed that noncompliant also have decreased adherence to Ruscus aculeatus extracts (OR=0.870), micronized purified flavonoid fraction (MPFF) preparations (OR=0.886), and topical agents (OR=0.877), but not horse chestnuts seed extracts. Coexisting obesity and other chronic illnesses were among the factors that decreased the use of Ruscus aculeatus extracts and micronized purified flavonoid fraction (MPFF) preparations. The use of topical agents was reduced with age, male sex, patients with coexisting chronic illnesses, obesity and adverse to accepting compression therapy. Additionally diuretics, antiplatelet agents and low-molecular weight heparins were less frequently used in the noncompliant population.Patients who are not compliant with compression therapy are more frequently not adherent to pharmacological therapy. Coexisting obesity and other chronic illnesses demonstrate decrease in adherence to CVD pharmacotherapy.

Published
2012

6. Zawartość metalicznych i niemetalicznych pierwiastków w homogenatach próbek tkankowych pobranych z amputowanych na poziomie uda z powodu miażdżycy kończyn dolnych. Doniesienie wstępne

Author

Ziaja, D., John, Ewa, Mikuła, Barbara, Kita, Andrzej, Chudek, J., Stańczyk, D., Bolkowski, T., Mazurek, U., Biolik, G., Duława, J., Szyber, P., Kruszniewska-Rajs, C., Kowalewska-Twardela, T., and Ziaja, K.

Subjects
metallic and non-metallic elements, atherosclerosis, peripheral artery disease
Abstract

Background: Metallic and non-metallic elements have influence on the development the changes within structure and function of arteries in different regions of vascular tree. The content of elements into arterial walls varies according to geographical origin of people. Material and methods: Tissue specimens were taken from the six lower limbs amputated on the level of thigh due to atherosclerosis. The mean age was 69 (57 to 84). Tissue specimens were collected from the limbs from the level of amputation, the popliteal fossa and the dorsal artery of foot. After chemical processing of the tissues homogenates determination of the content of elements using atomic emission spectrometry method with inductively coupled plasma (inductively coupled plasma optical emission spectroscopy) was performed. The content of Al, Ba, Ca, Cu, Fe, K, Mg, Mn, P, S, Sr and Zn was determined. Results: As a point of reference mean absolute value occurred from six specimens on the level of thigh was assumed as 100%. Content of non-metallic elements such as Ca, P and S rise towards to periphery of amputated limb reaching few times higher values on the level of dorsal artery of foot. Content of some metallic elements such as: Fe, Zn, K and Sr also rise towards to periphery of extremity. The Cu accumulation was the highest on the level of popliteal fossa, while Mn, Al and Mg concentration was the lowest on this same level and the highest in dorsal artery of foot. Conclusions: The influence of individual elements on development the atherosclerosis especially on necrotic changes requires further investigations. Described problem pose a preliminary report only in order to indicate the issue and to check the method of analysis.

Published
2010

7. A collaborative approach to iron ore beneficiation at Assmang Khumani processing plant.

Author

Dopp S., Iron ore conference 2011 Perth, Western Australia 11-Jul-1113-Jul-11, du Toit T., Ziaja D., Dopp S., Iron ore conference 2011 Perth, Western Australia 11-Jul-1113-Jul-11, du Toit T., and Ziaja D.

Abstract

A feasibility study was carried out at Beeshoek Mine (Assmang Khumani, Northern Cape, South Africa) which included extensive mineralogical and metallurgical investigations. The design process and logic followed over the last years is outlined, and the reasoning behind today's value added approach discussed. As an integral part of the beneficiation concept, focus is set on the jigs; lumpy and fine jigs sort grain sizes under 32 mm at 340 t/h and under 8 mm at 300 t/h, respectively. Dense media separation was evaluated as an alternative to jigging in a comparative test work study, but this option had to be excluded due to its inability to achieve the sales specifications. In contrast, the prospect of producing an additional middlings fraction on the lumpy ore jigs proved to be an adequate option for further improvements of overall mass yield. With further liberation, a saleable product will be achieved by secondary beneficiation on fines jigs and wet high intensity magnetic separation (WHIMS). Jigs are considered the most viable and cost effective beneficiation process for off-grade ore +0.8 - 32 mm, while WHIMS is the process under consideration for super fines recovery., A feasibility study was carried out at Beeshoek Mine (Assmang Khumani, Northern Cape, South Africa) which included extensive mineralogical and metallurgical investigations. The design process and logic followed over the last years is outlined, and the reasoning behind today's value added approach discussed. As an integral part of the beneficiation concept, focus is set on the jigs; lumpy and fine jigs sort grain sizes under 32 mm at 340 t/h and under 8 mm at 300 t/h, respectively. Dense media separation was evaluated as an alternative to jigging in a comparative test work study, but this option had to be excluded due to its inability to achieve the sales specifications. In contrast, the prospect of producing an additional middlings fraction on the lumpy ore jigs proved to be an adequate option for further improvements of overall mass yield. With further liberation, a saleable product will be achieved by secondary beneficiation on fines jigs and wet high intensity magnetic separation (WHIMS). Jigs are considered the most viable and cost effective beneficiation process for off-grade ore +0.8 - 32 mm, while WHIMS is the process under consideration for super fines recovery.

Published
2011

8. Recent applications of high-efficiency pneumatic flotation technology in coal and minerals.

Author

Golding T.K., Centenary of flotation symposium Brisbane, Queensland 06-Jun-0509-Jun-05, Jaspers W., Ziaja D., Golding T.K., Centenary of flotation symposium Brisbane, Queensland 06-Jun-0509-Jun-05, Jaspers W., and Ziaja D.

Abstract

A brief history is presented of the development of pneumatic flotation cells from the early 20th century to the present day. The efficiency and simplicity of design and operation of pneumatic cells are compared with those of conventional cells. Recent successful testwork is described on phosphate minerals in the USA and various coal types in Australia. The Pneuflot process for the separation and recovery of fine mineral particles is described. Key aspects of pneumatic technology are improved recovery and selectivity with lower capital expenditure and operating costs., A brief history is presented of the development of pneumatic flotation cells from the early 20th century to the present day. The efficiency and simplicity of design and operation of pneumatic cells are compared with those of conventional cells. Recent successful testwork is described on phosphate minerals in the USA and various coal types in Australia. The Pneuflot process for the separation and recovery of fine mineral particles is described. Key aspects of pneumatic technology are improved recovery and selectivity with lower capital expenditure and operating costs.

Published
2005

17. Typical KHD Humboldt Wedag AG equipment for iron ore beneficiation.

Author

Waldhecker H., Ironmaking resources and reserves estimation Perth, Western Australia 25-Sep-9726-Sep-97, Hahn C., Ziaja D., Waldhecker H., Ironmaking resources and reserves estimation Perth, Western Australia 25-Sep-9726-Sep-97, Hahn C., and Ziaja D.

Abstract

Design concepts and some flowsheets are presented for the air-pulsed BATAC jig, the JONES wet high intensity separator, the hydraulic percussion table, circular/vibrating screens, the roller press and the PNEUFLOT pneumatic flotation system. Goldsworthy Mining, in the Pilbara region of Western Australia, use two BATAC jigs to produce 2 400 000 tons/a of lump ore and sinter fines grading around 63% Fe, 6.4% SiO2, 1.1% Al2O3, 0.041% P and 1.9% LOI. Ferteco Mineracao in Brazil also use a BATAC jig. JONES separators are used in Brazil at the Caue and Conceicao plants, for processing itabirite. The Michilla mine in Chile has retrofitted existing agitation froth flotation technology with PNEUFLOT cells for processing Cu ores. Monthly concentrate production increased to 2 590 t with an average Cu content of 43.6% at a total Cu yield of 81.61%., Design concepts and some flowsheets are presented for the air-pulsed BATAC jig, the JONES wet high intensity separator, the hydraulic percussion table, circular/vibrating screens, the roller press and the PNEUFLOT pneumatic flotation system. Goldsworthy Mining, in the Pilbara region of Western Australia, use two BATAC jigs to produce 2 400 000 tons/a of lump ore and sinter fines grading around 63% Fe, 6.4% SiO2, 1.1% Al2O3, 0.041% P and 1.9% LOI. Ferteco Mineracao in Brazil also use a BATAC jig. JONES separators are used in Brazil at the Caue and Conceicao plants, for processing itabirite. The Michilla mine in Chile has retrofitted existing agitation froth flotation technology with PNEUFLOT cells for processing Cu ores. Monthly concentrate production increased to 2 590 t with an average Cu content of 43.6% at a total Cu yield of 81.61%.

Published
1997

19. Neurological symptoms associated with cerebral hyperperfusion syndrome after CEA and CAS -- one centre study.

Author

ZIAJA, D., BIOLIK, G., KOCEŁAK, P., SZNAPKA, M., JANAS, P., CZAJKA, A., CHUDEK, J., and ZIAJA, K.

Abstract

BACKGROUND: There are two equivalent in efficacy methods of the treatment of carotid artery stenosis: endarterectomy (CEA) and stenting (CAS), in which the blood flow increases in most patients by 20-40% over baseline, in some exceeding 100% and being symptomatic and leading to cerebral hyperperfusion syndrome (CHS). AIM: The aim of this study is to analyze the structure of neurological symptoms associated with CHS in patients with carotid artery revascularization. PATIENTS AND METHODS: Retrospective analysis included 1386 consecutive patients treated in the Department of General and Vascular Surgery between 2005 and 2011, with 625 of them were subjected to CEA and 761 to CAS. If neurological symptoms occurred, patients were consulted by a neurologist and ultrasonography (USG) examination and CT were performed. Neurological symptoms in patients with new onset of headache ipsilateral to the carotid revascularization were extracted from medical records and nursing documentation. RESULTS: Neurological symptoms attributed to CHS were observed in 66 (10.6%) of CEA and 61 (8.0 %) of CAS group. The frequency was similar in both groups (p = 0.43). The occurrence of epileptic attacks was similar in both study groups. The only difference was the less frequent falling of the lip in CAS group. Transient bradycardia and/or hypotension were observed in CAS (8.8% vs. 10.4% and 1.3% vs. 1.3%, respectively). No difference in stroke appearance between groups were found. CONCLUSIONS: The occurrence of neurological symptoms attributable to cerebral hyperperfusion syndrome after carotid artery revascularization in short term observation is similar regardless of the method used. [ABSTRACT FROM AUTHOR]

Published
2014

20. Neck duplex Doppler ultrasound evaluation for assessing chronic cerebrospinal venous insufficiency in multiple sclerosis patients.

Author

Zaniewski, M., Kostecki, J., Kuczmik, W., Ziaja, D., Opala, G., Świat, M., Korzeniowski, T., Majewski, E., Urbanek, T., and Pawlicki, K.

Subjects
CEREBROVASCULAR disease diagnosis, VENOUS insufficiency, CEREBRAL circulation, CHI-squared test, CONFIDENCE intervals, DUPLEX ultrasonography, EPIDEMIOLOGY, FISHER exact test, MULTIPLE sclerosis, NECK, STATISTICS, LOGISTIC regression analysis, DATA analysis, DESCRIPTIVE statistics, DIAGNOSIS
Abstract

Introduction: Recent clinical studies have suggested a relationship between multiple sclerosis (MS) and the occurrence of pathological changes in the jugular, vertebral and azygous veins that result in abnormal blood outflow from the brain and the spinal cord. Together, these pathological changes have been designated chronic cerebrospinal venous insufficiency (CCSVI). The aim of the present study was to evaluate the usefulness of duplex Doppler ultrasound in the evaluation of central nervous system venous outflow disturbances in patients suffering from MS. Methods: We examined 181 patients with MS, diagnosed on the basis of the McDonald criteria, and 50 healthy volunteer controls. All patients underwent Doppler ultrasound examination of the internal jugular veins (IJV) and vertebral veins (VVs). The presence of outflow disturbances and morphological abnormalities were evaluated. Results: Pathological changes in the extracranial jugular veins were diagnosed in 148/181MS patients (82%) and 7/50 control group volunteers (14%). The following abnormalities in the MS group were revealed: the presence of a reflux in the IJVs and/or VVs (54%), narrowing (54%), a complete block in the flow through the IJV (10%) and an abnormal postural control of the cerebral outflow route (25%). These particular pathologies were of statistical significance in the MS group compared with the control group. This study also revealed a correlation between the occurrence of inverted flow in patients in a sitting position and chronic progressive MS (P = 0.0033). Conclusions: The examinations undertaken indicate a possible connection between MS and CCSVI. The widely accessible and highly sensitive and specific Doppler ultrasound test may be useful for revealing, and preliminary analysis of, CCSVI pathologies. [ABSTRACT FROM AUTHOR]

Published
2013
Full Text
View/download PDF

21. Cost-Efficient Beneficiation of Coal by ROMJIGs and BATAC Jigs

Author

Sanders, G. J., Ziaja, D., and Kottmann, J.

Abstract

Jigs represent one of the earliest types of machinery employed in mineral separation. Their adaptation to process coal established jigs as the most popular and efficient method of coal cleaning for over a century until the arrival of dense medium process. Increased demand for more and more cost-efficient methods of beneficiation lead to a review of the jigging process. Application of new concepts and the use of new technology of manufacture and controls resulted in new forms of jigs. The under-bed pulsated Batac jig is shown to have improved performance over the Baum types. A comparative cost study showed substantial capital and operating cost advantages against dense medium bath or cyclone alternatives. The principle of moving bed jigging is revived in the ROMJIG for the treatment of very large sizes. De-shaling at sizes up to 350-400 mm opens up the way to cheap primary separation of discard, allowing economical mining of lower grade deposits and providing cheap alternatives to upgrading capacity of existing plants.

Published
2002
Full Text
View/download PDF

22. Experimental verification of the numerical model of a reinforced concrete arch

Author

Markiewicz Barbara, Piątkowski Grzegorz, Szyszka Łukasz, and Ziaja Dominika

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

The paper presents numerical and experimental dynamic analysis of the reinforced concrete arch. The measurement of the accelerations at various points of the structure as a response to the force (single input-multiple output approach) was made. Dynamic response of the concrete arch has been measured by piezoelectric accelerometers and signals have been recorded by multi-channel LMS SCADAS Mobile recorder. As a result of the measurements frequencies and mode shapes have been determined. ADINA program has been used for building of numerical models. The static scheme of the arch (the stiffness of the supports) has been updated using the genetic algorithms (GA) available in MATLAB to obtain the results, which correspond to dynamic testing. Two similarity criteria have been considered: the mean squared error (MSE) between frequencies and the Modal Assurance Criterion (MAC) for forms comparison. In additional example, the Young’s modulus has been also optimized.

Published
2019
Full Text
View/download PDF

23. Anomaly detection in the concrete arc girder subjected to fatigue test

Author

Ziaja Dominika and Nazarko Piotr

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

A steel reinforced concrete arch of a bridge girder has been subjected to static and fatigue tests. The aim of this study is the application of guided waves in non-destructive diagnostics of civil engineering structures and early damage detection. Two piezoelectric transducers were mounted at a distance of 1 m to monitor area of the arch keystone. After every 500 000 cycles the signals of elastic waves have been measured and the girder visual examination was carried out. It turned out that both the load magnitude and the appearance of cracks have affected the signal changes. The obtained signal database has been used to train artificial neural networks and establish a diagnostic system. The results of the conducted tests have showed good sensitivity of anomaly detection and satisfying accuracy of load identification.

Published
2019
Full Text
View/download PDF

26. Analysis of perioperative mortality rate in patients with abdominal aortic aneurysm treated at the Department of General and Vascular Surgery, Silesian Medical University in 1978-2005,Analiza wskaźnika śmiertelności okołooperacyjnej u chorych z tetniakiem aorty brzusznej w Klinice Chirurgii Ogólnej i Naczyń Ślaskiej Akademii Medycznej w latach 1978-2005

Author

Ziaja, K., Kuczmik, W., Urbanek, T., Kostyra, J., Kazibudzki, M., Przemyslaw Nowakowski, Krupowies, A., Ludyga, T., Latała, R., Ziaja, D., Kowalewska-Twardela, T., Biolik, G., Szaniewski, K., Orawczyk, T., Ćwik, P., Glanowski, M., Kucharzewski, M., and Samorodny, J.

32. Effectiveness of using micronised diosmin - Diosminex (2 × 500 mg) in the treatment of chronic venous insufficiency in the Polish population-results of a multi-site observational study,Skuteczność stosowania preparatu zmikronizowanej diosminy (Diosminex®) w leczeniu przewleklej niewydolności z̄ylnej w populacji polskiej - wyniki wieloosrodkowego badania obserwacyjnego

Author

Ziaja, D., Chudek, J., Maruszynski, M., Sieron, A., Molski, S., Grzegorz Biolik, Grzymala, J., Stoltny-Sierion, K., Wieczorek, B. M., Tkocz, M., and Ziaja, K.

35. The early results of the surgical treatment of liver focal lesions in the 15-year experience of the Department of General and Vascular Surgery at the Medical University of Silesia,Wczesne wyniki leczenia guzów watroby w 15-letnim doświadczeniu Katedry i Kliniki Chirurgii Ogólnej i Naczyń Ślaskiej Akademii Medycznej w Katowicach

Author

Ziaja, K., Ludyga, T., Kazibudzki, M., Krupowies, A., Ziaja, D., Kuczmik, W., Stańczyk, D., Zmudzki, J., Biolik, G., Przemyslaw Nowakowski, Orawczyk, T., and Urbanek, T.

42. The content of metallic and non-metallic elements in homogenates of tissue samples collected from the lower limbs amputated on the level of thigh due to atherosclerosis. Preliminary report,Zawartość metalicznych i niemetalicznych pierwiastków w homogenatach probek tkankowych pobranych z amputowanych na poziomie uda z powodu miażdżycy kończyn dolnych. Doniesienie wstȩpne

Author

Ziaja, D., John, E., Mikuła, B., Kita, A., Chudek, J., Stańczyk, D., Bolkowski, T., Mazurek, U., Grzegorz Biolik, Duława, J., Szyber, P., Kruszniewska-Rajs, C., Kowalewska-Twardela, T., and Ziaja, K.

45. The development of jig technology in mineral processing.

Author

Tuckey K., Proceedings Extraction metallurgy Africa '98, held in Johannesburg, South Africa 05-Nov-9806-Nov-98, Ziaja D., Tuckey K., Proceedings Extraction metallurgy Africa '98, held in Johannesburg, South Africa 05-Nov-9806-Nov-98, and Ziaja D.

Abstract

An overview of the theory of jigging and the development of the jig from the earliest days is presented by KHD Humboldt Wedag who have been involved from the outset, concentrating on the development of the Baum jig and then the Batac jig with improved air pulsing. The development of the Romjig for extremely coarse run-of-mine coal is also covered. Further improvements to the Batac jig centred on the float mechanism which controls the discharge device, and reduction of wear and downtime by improved technology and materials. Fully computerised control based on PLCs is now standard, with two gate systems depending on feed size, and sensitive discharge control loops based on ultrasonic displacement measuring systems. Typical current operating results for ore are presented for Batac jigs, and for coarse coal for a Romjig. It is concluded that Batac jigs are a viable alternative to dense medium separation for the beneficiation of coal and iron ore and the recovery of metals from slag, and, as shown from testwork, have potential in areas such as pre-concentration of diamond-bearing gravels., An overview of the theory of jigging and the development of the jig from the earliest days is presented by KHD Humboldt Wedag who have been involved from the outset, concentrating on the development of the Baum jig and then the Batac jig with improved air pulsing. The development of the Romjig for extremely coarse run-of-mine coal is also covered. Further improvements to the Batac jig centred on the float mechanism which controls the discharge device, and reduction of wear and downtime by improved technology and materials. Fully computerised control based on PLCs is now standard, with two gate systems depending on feed size, and sensitive discharge control loops based on ultrasonic displacement measuring systems. Typical current operating results for ore are presented for Batac jigs, and for coarse coal for a Romjig. It is concluded that Batac jigs are a viable alternative to dense medium separation for the beneficiation of coal and iron ore and the recovery of metals from slag, and, as shown from testwork, have potential in areas such as pre-concentration of diamond-bearing gravels.

46. Beneficiation of lump iron ore and sinter fines by the use of air-pulsated BATAC jigs.

Author

Wasmuth H.D., Ziaja D., Wasmuth H.D., and Ziaja D.

Abstract

After minor modifications in the design, the air-pulsated BATAC jig can be applied to the upgrading of intergrown iron ores (lump ores as well as sinter fines that require high separation densities to obtain marketable concentrate grades). BATAC jigs are operating successfully in two large iron ore beneficiation plants in Australia and Brazil. These plants are described with their first operational experiences., After minor modifications in the design, the air-pulsated BATAC jig can be applied to the upgrading of intergrown iron ores (lump ores as well as sinter fines that require high separation densities to obtain marketable concentrate grades). BATAC jigs are operating successfully in two large iron ore beneficiation plants in Australia and Brazil. These plants are described with their first operational experiences.

47. Porównanie zmniejszania się worka tętniaka aorty brzusznej po implantacji stentgraftu Zenith i PowerLink w oparciu o własne doświadczenia.

Author

Ziaja, K., Kuczmik, W., Kostyra, J., and Ziaja, D.

Abstract

Copyright of Acta Angiologica is the property of VM Medica-VM Group (Via Medica) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2006

49. Ocena porównawcza wyników wewnątrznaczyniowego i chirurgicznego leczenia krytycznych zwężeń tętnic biodrowych.

Author

Ziaja, D., Kuczmik, W., Kostyra, J., Nowakowski, P., and Szaniewski, K.

Abstract

Wstęp: W związku z rozwojem technik wewnątrznaczyniowych leczenia zmian miażdżycowych podjęto próbę retrospektywnego porównania dwóch grup chorych wymagających zaopatrzenia krytycznie zwężonego odcinka aortalno-udowego. Z powodów etycznych zrezygnowano z randomizacji chorych, ponieważ twierdzi się, że techniki wewnątrznaczyniowe są najlepszym rozwiązaniem problemu chorego na miażdżycę. Celem pracy było porównanie wyników wczesnych i odległych leczenia chirurgicznego i wewnątrznaczyniowego u chorych ze zwężeniem lub niedrożnością aortalno-udową. Materiał i metody: Grupa leczona metodą wewnątrznaczyniową liczyła 25 chorych, a operacyjnie 21 chorych. Do grupy leczonej operacyjnie zakwalifikowano pacjentów, u których obie metody leczenia zostały uznane za możliwe do przeprowadzenia (TASC B). Porównano także: dystans chromania, indeks pulsacji, indeks oporu, wskaźnik kostkowo-ramienny, długość całkowitego pobytu i długość okresu pooperacyjnego. Przeanalizowano powikłania okołooperacyjne i odległe w obu grupach. Ponadto porównano schematy leczenia farmakologicznego oraz przytoczono opinie subiektywne pacjentów. Weryfikowano wyniki z okresów przed i po wykonanej procedurze. Wyniki: Wyniki uzyskane zaraz po zabiegu przemawiają za metodą wewnątrznaczyniową. Chorzy szybciej byli uruchamiani i krócej przebywali w szpitalu. Liczba i jakość powikłań w tym okresie także przemawia za metodą wewnątrznaczyniową. W kolejnych etapach leczenia różnica w długości dystansu chromania po przeprowadzonych zabiegach przemawia za grupą leczoną chirurgicznie i wynosi odpowiednio: okres po operacyjny -- 17 m, 1 mc -- 78 m, 3 -- 191 m, 12 mc -- 157 m. Wartości średnie indeksu pulsacji (PI) przed zabiegiem były wyższe w grupie leczonej metodą wewnątrznaczyniową, natomiast w kolejnych fazach leczenia wyższe wartości średnie zostały uzyskane w grupie leczonej chirurgicznie. W obu grupach obserwowano wzrost wartości indeksu oporu (RI) w kolejnych fazach leczenia po wykonanych zabiegach. Porównując wartości wskaźnika kostowo-ramiennego zaobserwowano gwałtowny wzrost wartości po zabiegu w porównaniu z wynikami sprzed zabiegu, natomiast w kolejnych fazach badania obserwowano tendencję spadkową. Wyniki odległe, pochodzące z około 12 miesięcy po zabiegu przemawiają jednak za leczeniem operacyjnym. Dystans chromania był znamiennie dłuższy w grupie leczonej chirurgicznie. Wartości API także przemawiają za leczeniem rekonstrukcyjnym. Wnioski: 1. We wczesnym okresie obserwacji wyniki rewaskularyzacji kończyny wskazują na przewagę leczenia metodą wewnątrznaczyniową. 2. Wyniki odległe przemawiają za leczeniem operacyjnym. 3. Do zabiegów wewnątrznaczyniowych mogą być kwalifikowani chorzy należący do grupy wysokiego ryzyka. [ABSTRACT FROM AUTHOR]

Published
2006

50. Leczenie zakażeń protez naczyniowych wszczepionych w odcinku aortalno-biodrowym -- 10 lat później.

Author

Ziaja, K., Urbanek, T., Kostyra, J., Kucharzewski, M., Glanowski, M., Kuczmik, W., and Ziaja, D.

Abstract

Copyright of Acta Angiologica is the property of VM Medica-VM Group (Via Medica) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2006

Catalog

Books, media, physical & digital resources
See catalog results