Changing Tendencies of Patients with Electrical Burns in Lithuania from 2016 to 2020

Background. Electrical injuries are not common, however these injuries are severe. The burns cause damage for both superficial and deep layers of skin, as well as deeper tissues, and can lead to necrosis. Morbidity and mortality from electrical injuries are quite high and have physical and psychological consequences. Epidemiological analysis of electrical burns helps to understand patterns of these devastating injuries and to plan further treatment strategies. The objective of the study is to evaluate the number of patients affected by electrical injuries in Lithuania from 2016 to 2020. Methods. Data for the study were used from the Health Information Center of the Institute of Hygiene, calculated from the information system SVEIDRA of the State Health Insurance Fund under the Ministry of Health of Lithuania. Statistical analysis of the data was performed using IBM SPSS statistics 23.0 software. Using the Mann-Whitney criterion, a comparison was made between the percentage distributions of electrical injuries during the study period. Results. During five years (2016–2020), 355 peop­le in total, 85 of them children, were affected by electrical injuries. Men were more likely to suffer from electric injuries. 80.4 percent males were affected and 19.6 percent females. Overall, electrical injuries decreased by 8.45 percent. The number of electrical injuries decreased by 3.66% in the children group and 4.79% in the adult group. Conclusions. After reviewing the research data, it can be concluded that from 2016 to 2020, there was decreased tendency of electrical injuries in Lithuania by 15.3% among children and by 6.29% among adults. Men were more likely to experience electrical injuries. Ongoing prevention strategies and measures in society and raising social awareness are key factors in reducing electrical injuries

Generation of nanoparticles in the concentrated energy (laser beam) and gas flow

The method of generation and selection of small nanoparticles in the airflow is considered in this paper. To melt the material (stainless steel), a concentrated energy flow – a pulsed solid‐state laser beam – was used. Using the Mossbauer spectroscopy method, the particle sizes and their chemical composition at various distances from the melting place were determined. The influence of parameters of the laser beam power and the airflow on the size of particles and their chemical composition was investigated. First Published Online: 14 Oct 201

Kairiojo plaučio transplantacija žiurkei: eksperimentinio modelio paieškos

Remigijus Sipavičius1, Aleksejus Zorinas1, Dalia Drobelytė2, Rokas Šerpytis2, Vytautas Sirvydis1.1 Vilniaus universiteto Širdies ir kraujagyslių ligų klinikos Širdies chirurgijos centras,Santariškių g. 2, LT-08661 Vilnius2 Vilniaus universiteto Medicinos fakultetas,M. K. Čiurlionio g. 21, LT-03101 VilniusEl. paštas: [email protected] Tikslas Sukurti ar pritaikyti esamus eksperimentinius modelius žiurkėms, tęsiant tyrinėjimus plaučių transplantacijos srityje. Metodai Žiurkėms atliekama kairiojo plaučio autotransplantacija arba ortotopinė transplantacija. Autotransplantacijos atveju atliekama kairiojo plaučio pulmoplegija, plautis paliekamas vietoje konservacijai norimam išemijos laikui. Jam praėjus atkuriama plaučio kraujotaka. Transplantacijos atveju donorui atliekama abiejų plaučių pulmoplegija, jie konservuojami norimą išemijos laiką. Recipientui pašalinamas kairysis plautis. Praėjus išemijos laikui, donoro kairysis plautis persodinamas recipientui, atkuriama plaučio kraujotaka. Rezultatai Atlikta 11 eksperimentų, penki iš jų – sėkmingai. Pagrindinės nesėkmių priežastys buvo broncho ar jo anastomozės plyšimas bei anestetikų perdozavimas. Išvados Esamus eksperimentinius modelius pavyko adaptuoti žiurkėms. Jie taikytini tolesnems plaučių transplantacijos tyrinėjimams. Pagrindiniai žodžiai: plaučių transplantacija, eksperimentinis modelis Left lung transplantation in rat: search for the experimental model Remigijus Sipavičius1, Aleksejus Zorinas1, Dalia Drobelytė2, Rokas Šerpytis2, Vytautas Sirvydis1.1 Vilnius University Clinic of Cardiovascular Diseases, Heart Surgery Centre,Santariškių str. 2, LT-08661 Vilnius, Lithuania2 Vilnius University Faculty of Medicine,M. K. Čiurlionio str. 21, LT-03101 Vilnius, LithuaniaE-mail: [email protected] Objective To design a new or to adapt the existing experimental models of rat lung transplantation. Methods Both left lung autotransplantation and orthotopic transplantation are implemented in rat. At autotransplantation, the left lung is left in situ after pulmoplegia. After a settled ischaemic time the lung perfusion is restored. At transplantation, pulmoplegia is performed in the donor. Lungs are separated and preserved for a settled ischaemic time. The recipient's left lung is removed and the donor's left lung transplantation is performed. The graft's perfusion is restored. Results Eleven experiments were carried out, 5 of them successfully. The main reasons for failure were bronchial anastomosis dehiscence or bronchial tear and anesthetic overdosage. Conclusion Existing experimental models were successfully adapted in rat, capacitating the further lung transplantation research. Key words: lung transplantation, experimental mode

Disekuojamoji torakoabdominalinės aortos aneurizma: nediagnozuota fistulė į kairįjį pagrindinį bronchą

Vytautas Sirvydis1, Arimantas Grebelis1, Gintaras Turkevičius1, Vytautas Pronckus1, Remigijus Sipavičius1, Stasys Stankevičius2, Mindaugas Balčiūnas2, Povilas Radikas2, Evaldas Žurauskas31 Vilniaus universiteto Širdies ir kraujagyslių ligų klinika, Širdies chirurgijos centras,Vilniaus universiteto ligoninė "Santariškių klinikos", Santariškių g. 2, LT-08611 VilniusEl. paštas: [email protected] Vilniaus universiteto Anesteziologijos ir reanimatologijos klinika,Anesteziologijos, intensyvios terapijos ir skausmo gydymo centras,Vilniaus universiteto ligoninė "Santariškių klinikos"3 Valstybinis patologijos centras Įvadas Pateikiamas nediagnozuotos disekuojamosios torakoabdominalinės aneurizmos (Crawfordo II tipo) fistulės į kairįjį plautį atvejis. Klinikinis atvejis Didelė intervencijos rizika ir sąlyginai stabili ligonio būklė nutolino operaciją. Paskutinio hospitalizavimo metu buvo įtarta aneurizmos disekacija ir spindžio trombozė. Dėl sparčiai blogėjančios būklės ligonis buvo operuojamas skubos tvarka. Operuojant rasta pilna trombų disekuojanti degeneravusi nusileidžiančiosios aortos aneurizma ir jos fistulė į kairįjį pagrindinį bronchą. Pašalinus aneurizmos maišą, nusileidžiančioji aorta buvo pakeista kraujagysliniu protezu, pašalintas ir nefunkcionavęs kairysis plautis. Pooperacinį laikotarpį sunkino tebesitęsiantis difuzinis kraujavimas. Nepaisant intensyvaus gydymo, ligonio būklė vis blogėjo ir jis mirė antrą parą po operacijos nuo dauginio organų nepakankamumo. Patologiniu pašalintojo plaučio tyrimu nustatyti seni organizuoti trombai ir nauji krešuliai bronchuose, taip pat cholesterolio kristalai parenchimoje, rodantys kraujavimo epizodus ir lėtinę embolizaciją aterominėmis plokštelėmis pro aneurizmos ir broncho fistulę. Išvada Ligonius, kuriems yra torakoabdominalinė aortos aneurizma, reikia stebėti labai aktyviai ir trumpai, o indikacijos chirurginiam gydymui turi būti nustatomos anksčiau ir ryžtingiau. Reikšminiai žodžiai: krūtinės aortos aneurizma, pilvo aortos aneurizma, disekuojamoji aortos aneurizma, aortos plyšimas Dissecting thoracoabdominal aortic aneurysm: an undiagnosed rupture into the left main bronchus Vytautas Sirvydis1, Arimantas Grebelis1, Gintaras Turkevičius1, Vytautas Pronckus1, Remigijus Sipavičius1, Stasys Stankevičius2, Mindaugas Balčiūnas2, Povilas Radikas2, Evaldas Žurauskas3 Background A case report presents a patient with undiagnosed Crawford type II dissecting thoracoabdominal aneurysm fistulation into the left main bronchus. Case report The high risk associated with the aneurysm repair and the conditionally stable patient’s state delayed the elective operative treatment. At a recent admission, aneurysm dissection with lumen thrombosis was suspected. The quickly deteriorating patient’s condition determined urgent surgical intervention. A dissecting degenerative descending aortic aneurysm packed with a large amount of thrombi and fistulation into the left main bronchus was found during the procedure. Following debridiment the descending aorta was replaced with a prosthetic graft, and the non-functioning left lung was extirpated. Persistent diffuse bleeding complicated the early postoperative course. Despite the aggressive medical therapy, the patient’s condition deteriorated progressively and he died on the second postoperative day due to multisystemic organ failure. Pathological investigation of the resected left lung showed chronic organized thrombi and fresh clots within the bronchi with cholesterol crystals in the parenchyma, evidencing bleeding episodes with chronic embolisation with atheromatous plaques through the aneurysm-bronchial fistula. Conclusion The follow-up of patients with thoracoabdominal aneurysm should be very active and short, and indications for surgical repair should be determined earlier and more decisively. Keywords: thoracic aortic aneurysm, abdominal aortic aneurysm, dissecting aortic aneurysm, aortic ruptur

Wind plants generated noise research using WindPro model

Magistriniame darbe analizuojami vėjo jėgainių generuojamo triukšmo dėsningumai naudojant WindPro programinės įrangos paketą Naudojantis šiuo paketu buvo ištirta vėjo jėgainių skleidžiamo akustinio triukšmo priklausomybė nuo jėgainės stebulės aukščio, bei aplinkos sąlygų. Siekiant palyginti modeliavimo metu gautus rezultatus, buvo išmatuoti kelių vėjo jėgainių triukšmingumo lygiai. Jėgainių generuojamas triukšmas mažėja tolstant nuo jėgainės. „Enercon“ firmos jėgainės yra tyliausios lyginant su atitinkamos galios „Vestas“ ir „Siemens“ firmų įrenginiais. Taip pat nustatyta, kad beveik visais atvejais modeliuojamos jėgainės generuojamas triukšmo lygis yra mažesnis nei išmatuotas eksperimento garso slėgio lygis. Tai galėjo įtakoti jėgainių nusidėvėjimas, vyraujančių vėjų kryptis, aplinkos įtaka.In this master's work wind turbines generated noise patterns are analysed using WindPro software package. The dependence of the acoustic noise emitted by wind plant, on the geometry of the plant and environmental conditions has been simulated. Also wind turbine noice of few wind plants was measured experimentally. It has been shown that wind turbine noice increases with the wind speed and the power plant`s installed capacity and it gradually decreases with distance from the plant. Also it has been established that "Enercon" power plants are the quieter compared with the corresponding Vestas and power plants. It has been found that in almost all cases, the calculated level of the acoustic noice is less than the measured ones. This could be affected by the plants depreciation, prevailing winds, environmental influences.Vytauto Didžiojo universiteta

Effects of manual therapy and exercises on back pain and functional status

Background. Studies have found that spinal stabilization exercises improve lumbar deep muscle function and reduce back pain. Spinal mobilization and manipulation reduce disability and pain in the treatment of chronic back pain. However, there are not enough studies to show a greater or lesser effect of different manual therapies in the treatment of lower back pain. Research aim was to determine the effect of different manual therapy methods and spinal stabilization exercises on pain and functional status in individuals experiencing lower back pain. Methods. The study included 18 subjects experiencing chronic nonspecific lower back pain. The subjects were randomly divided into two groups. One group underwent spinal vertebral mobilization with movement (sustained natural apophyseal glides – SNAG’s) and spinal stabilization exercises, and the other group underwent non-specific lumbar spine manipulation and spinal stabilization exercises. Before and after the intervention back pain (SAS), functional status and disability, abdominal muscle static endurance, back muscle static endurance, lateral trunk muscle static endurance, and spine mobility were assessed. Results. All subjects had statistically significant (p < 0.05) changes in results related with pain, disability and functional status, lumbar spine mobility, and lumbar muscle static endurance, comparing them before and after the intervention. The results of the study before and after the intervention did not differ significantly between the groups. Conclusion. Spine mobilization with movement and core stability exercises as well as non-specific lumbar-sacral spine manipulation and core stability exercises were found to reduce low back pain and improve functional status; the effects did not differ between different manual therapy methods

Nanoparticle generation methods for the production of lubricants

Nanostructured materials are known to have novel physical and chemical properties due to the different surface to volume ratio when compared to their bulk counterparts. Such materials can be successfully applied in solving tribological problems by injecting it into the lubricating mediumFizikos institutasVytauto Didžiojo universitetasŽemės ūkio akademij

Oxidation of Stainless Steel by Laser Cutting

Oxidation of erosion products was studied by means of the Mössbauer spectroscopy and X-ray diffraction methods when the strip of stainless steel was cut with the laser. Different content of wustite and chromium doped magnetite $Fe_{3-x}Cr_{x}O_{4}$ was found in the samples of erosion products depending on the place where the erosion products were collected in relation to the cutting slot. Conversion electron Mössbauer spectroscopy data showed that more magnetite was found at the surface while wustite distributes in the whole volume of particles of erosion products

Study of fe based nanoparticles for tribosuspensions

Nanoparticles can be used to make tribosuspensions mixing them with oils or other liquids. Tribosuspension are widely applied in industry, transportation and etc. having aim to cool the contacting surfaces and reduce friction improving longevity of the surfaces. In the study the methods that are cheap and can generated large amount of nanoparticles were chosen. Nanoparticles were obtained by laser cutting (Fig. 1) and the selection of the nanoparticles in the gas flow [1]. Mechano-synthesis using iron and other metal salt were also applied to obtain large amount of Fe mixed different metal (Co, Fe, Mn, Ti) oxide (oxyhydroxide) nanoparticles [2, 3]Fizikos institutasVytauto Didžiojo universitetasŽemės ūkio akademij