69 research outputs found
Continuous wave nearβinfrared atomic Xe laser excited by a radio frequency discharge in a slab geometry
Nearβinfrared atomic Xe laser lines have been generated from an Ar:He:Xe laser gas mixture excited by a radio frequency (rf) discharge in a slab geometry. A maximum continuous wave (cw) output power of 1.5 W (270 W/l) was obtained at an rf frequency of 125 MHz from a gas mixture containing Ar:He:Xe (50:49:1) at a total gas pressure of 90 Torr
A clinical case of successful application of a new treatment method for severe COVID-19
COVID-19, formerly coronavirus infection 2019-nCoV, is a potentially severe acute respiratory infection caused by the SARS-CoV-2 coronavirus (2019-nCoV). It is a dangerous disease that can occur both in the form of a mild acute respiratory viral infection and in a severe form with the development of bilateral polysegmental viral pneumonia, specific complications of which may include acute respiratory distress syndrome, resulting in the respiratory failure with a high risk of death. Due to the absence of etiotropic therapy for the coronavirus infection, pathogentic treatment becomes of primary importance. We present a clinical case of a severe form of COVID-19 in a 33-year-old man to whom we administered a new method of pathogenetic treatment of this disease based on immunosuppresiive therapy followed by therapeutic plasma exchange and infusion of non-specific human immunoglobulin
ΠΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΈΠΊΠΈ ΡΠΊΡΡΡΠ°ΠΊΠΎΡΠΏΠΎΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Π½ΠΎΠΉ ΠΎΠΊΡΠΈΠ³Π΅Π½Π°ΡΠΈΠΈ Ρ ΠΏΠ°ΡΠΈΠ΅Π½ΡΠ° Ρ ΡΠ΅ΡΠΏΠΈΡΠ°ΡΠΎΡΠ½ΡΠΌ Π΄ΠΈΡΡΡΠ΅ΡΡΡΠΈΠ½Π΄ΡΠΎΠΌΠΎΠΌ Π½Π° ΡΠΎΠ½Π΅ ΠΌΠΈΠ°ΡΡΠ΅Π½ΠΈΠΈ
Myasthenia gravis is an autoimmune neuromuscular disease characterized by pathologically rapid fatigue of striated muscles [1]. The main symptom of myasthenia gravis is the presence of pathological muscle weakness with involvement of the ocular, bulbar and skeletal muscles in the pathological process. The provoking factors for the development of myasthenia gravis can be infectious diseases, surgery, drugs [2, 3]. The main danger is represented by myasthenic and cholinergic crises, which are characterized by a severe course and high mortality; therefore, the problems of treating myasthenia gravis are still of high medical and social significance. The prevalence of myasthenia gravis is 17.5β20.3 per 100 thousand population, and the number of patients is increasing by 5β10% annually [4, 5]. In recent years, there has been a steady increase in morbidity with an increase in age over 50 years [6, 7]. Myasthenia gravis is a serious disease with a high mortality rate of up to 30β40% [3]. There are difficulties in the early differential diagnosis of muscle weakness in patients with respiratory failure between myasthenia gravis, myasthenic syndrome and critical illness polyneuropathy. These difficulties and insufficient awareness of patients and doctors of various specialties about myasthenia gravis can lead to the choice of the wrong treatment tactics and the development of myasthenic crisis, which is manifested by respiratory failure, requiring respiratory support. The progression of respiratory failure against the background of myasthenic crisis may require the use of extracorporeal membrane oxygenation (ECMO).It is necessary to expand the differential diagnosis of muscle weakness in a patient during the period of resolution of respiratory failure, allowing to move away from compulsory respiratory support, termination of ECMO.Β ΠΡΠΈ ΠΎΡΡΡΡΡΡΠ²ΠΈΠΈ ΡΠ²ΠΎΠ΅Π²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ Π΄ΠΈΠ°Π³Π½ΠΎΡΡΠΈΠΊΠΈ Π½Π΅ΡΠ²Π½ΠΎ-ΠΌΡΡΠ΅ΡΠ½ΠΎΠ³ΠΎ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΡ Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ ΠΏΡΠΎΡΠ΅Π΄ΡΡΡ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Π½ΠΎΠΉ ΠΎΠΊΡΠΈΠ³Π΅Π½Π°ΡΠΈΠΈ ΠΌΠΎΠΆΠ΅Ρ Π±ΡΡΡ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½Π°, ΡΠ΅ΠΌ ΡΠ°ΠΌΡΠΌ ΠΏΠΎΠ²ΡΡΠ°Ρ ΡΠΈΡΠΊΠΈ ΠΏΠΎΠ±ΠΎΡΠ½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ½Π΅Π½ΠΈΠΉ (Π³Π΅ΠΌΠΎΡΡΠ°Π³ΠΈΡΠ΅ΡΠΊΠΈΠ΅, ΡΠ΅ΠΏΡΠΈΡΠ΅ΡΠΊΠΈΠ΅, ΡΡΠΎΠΌΠ±ΠΎΡΠΈΡΠ΅ΡΠΊΠΈΠ΅). Π ΠΊΠ»ΠΈΠ½ΠΈΡΠ΅ΡΠΊΠΎΠΌ Π½Π°Π±Π»ΡΠ΄Π΅Π½ΠΈΠΈ ΠΌΡ Π΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΡΠ΅ΠΌ ΡΠ΅Π΄ΠΊΠΎΠ΅ ΡΠΎΡΠ΅ΡΠ°Π½ΠΈΠ΅ ΡΡΠΆΠ΅Π»ΠΎΠΉ ΠΏΠ½Π΅Π²ΠΌΠΎΠ½ΠΈΠΈ, ΠΌΠΈΠ°ΡΡΠ΅Π½ΠΈΠΈ, ΠΎΡΡΡΠΎΠ³ΠΎ ΡΠ΅ΡΠΏΠΈΡΠ°ΡΠΎΡΠ½ΠΎΠ³ΠΎ Π΄ΠΈΡΡΡΠ΅ΡΡ-ΡΠΈΠ½Π΄ΡΠΎΠΌΠ° ΠΈ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠΌΠΎΠΉ ΠΏΡΠΎΡΠ΅Π΄ΡΡΡ ΡΠΊΡΡΡΠ°ΠΊΠΎΡΠΏΠΎΡΠ°Π»ΡΠ½ΠΎΠΉ ΠΌΠ΅ΠΌΠ±ΡΠ°Π½Π½ΠΎΠΉ ΠΎΠΊΡΠΈΠ³Π΅Π½Π°ΡΠΈΠΈ.
New continuous wave infrared ArβXe laser at intermediate gas pressures pumped by a transverse radio frequency discharge
An atomic Xe laser with a transverse rf excitation has been operated in a cw mode in the intermediate pressure regime. The laser output spectrum consisted of 5 Xe lines with wavelengths of 2.03, 2.63, 2.65, 3.37, and 3.51 ΞΌm. The unoptimized total output power of 330 mW was obtained for a gas mixture Ar:He:Xe=59:40:1 at a pressure of 85 Torr and a rf input power of 150 W and excitation frequency of 121 MHz
Deposition of Aluminum-Doped ZnO Films by ICP-Assisted Sputtering
Inductively coupled plasma (ICP) assisted DC sputter deposition was used for the deposition of Al-doped ZnO (AZO or ZnO:Al) thin films. With increasing ICP RF power, film properties including deposition rate, crystallinity, transparency, and resistivity were improved. To understand the plasma-surface interaction, several plasma diagnostics were performed. Heat fluxes to the substrate were measured by thermal probes, number densities of sputtered metallic atom species were measured by absorption spectroscopy using hollow cathode lamps (HCL) and light emitting diodes (LEDs), and neutral gas temperatures were measured by external cavity diode laser (ECDL) absorption spectroscopy. As a result, it was revealed that the high-density ICP heated the substrate through a high heat flux to the substrate, resulting in a high-quality film deposition without the need for intentional substrate heating. The heat flux to the substrate was predominantly contributed by the plasma charged species, not by the neutral Ar atoms which were also significantly heated in the ICP. The substrate position where the highest quality films were obtained was found to coincide with the position where the substrate heat flux took the maximum value
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