13 research outputs found

    Acute kidney injury after primary total hip replacement

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    Surgical interventions that do not directly affect the urinary system can cause excretory dysfunction of kidneys. The aim. To establish the prevalence, risk factors and clinical significance of acute kidney injury after primary hip replacement performed in the clinic of the Irkutsk Scientific Centre of Surgery and Traumatology. Materials and methods. We carried out a retrospective analysis of the case histories of 109 patients who underwent primary total hip replacement under conditions of subarachnoid anesthesia in the clinic of the Irkutsk Scientific Centre of Surgery and Traumatology in 2021. Results. Postoperative changes in serum creatinine in 8 patients of the study group met the KDIGO (The Kidney Disease: Improving Global Outcomes) criteria for acute kidney injury. Initial indicators of renal excretory function in the subgroup with acute kidney injury were not different from those in the entire group. Statistically significant correlation was established between acute kidney injury and indicators of oxygen-carrying capacity of blood – initial and minimal postoperative hemoglobin concentration. Acute kidney injury in patients of the study group had a minimal effect on the clinical course of the early postoperative period. None of the patients required renal replacement therapy, re-transfer from the specialized unit to the intensive care unit or any specific treatment. The duration of postoperative stay of patients with acute kidney injury in the clinic did not increase. Conclusions. Acute kidney injury was detected in 7.3 Β % of patients who underwent primary total hip replacement. Risk factors for the development of postoperative acute kidney injury in Β patients of the study group included relatively low initial and Β minimal postoperative blood hemoglobin concentrations, which may indicate prerenal mechanism of acute kidney injury pathogenesis. Implementation of the main steps of the β€œrenal protocol” in patients with initial glomerular filtration rate over 45 ml/min/1.73 m2 allows avoiding the development of severe clinically significant forms of postoperative acute kidney injury and complications associated with it in the early postoperative period of primary total hip replacement

    РасчСт Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π² элСктроциклонС

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    To analyze the elektrocyclone flow hydrodynamic computer calculation using the finite element method (FEM) is applied. The geometry of the model corresponds to the laboratoryΒ Β elektrocyclone. k-Ξ΅-turbulence model is used for the computation. The system of equations is solved by SIMPLE algorithm. The calculation results give a pattern of the flow velocity distribution and flow lines in different sections. There is conclusion based on the results about elektrocyclone flow hydrodynamic.Для Π°Π½Π°Π»ΠΈΠ·Π° Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π² элСктроциклонС ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ ΠΊΠΎΠΌΠΏΡŒΡŽΡ‚Π΅Ρ€Π½Ρ‹ΠΉ расчСт с использованиСм ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΊΠΎΠ½Π΅Ρ‡Π½Ρ‹Ρ… элСмСнтов (МКЭ). ГСомСтрия ΠΌΠΎΠ΄Π΅Π»ΠΈ соотвСтствуСт Π»Π°Π±ΠΎΡ€Π°Ρ‚ΠΎΡ€Π½ΠΎΠΌΡƒ элСктроциклону. Для расчСтов использована k-Ξ΅-модСль турбулСнтности. БистСма ΡƒΡ€Π°Π²Π½Π΅Π½ΠΈΠΉ Ρ€Π΅ΡˆΠ°Π΅Ρ‚ΡΡ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ° SIMPLE. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ расчСта Π΄Π°ΡŽΡ‚ ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Ρƒ распрСдСлСния скоростСй ΠΏΠΎΡ‚ΠΎΠΊΠ° ΠΈ Π»ΠΈΠ½ΠΈΠΉ Ρ‚ΠΎΠΊΠ° Π² Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… сСчСниях. На основании Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² дСлаСтся Π²Ρ‹Π²ΠΎΠ΄ ΠΎ Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ элСктроциклона. ВыявлСн Ρ„Π°ΠΊΡ‚, Ρ‡Ρ‚ΠΎ Π² Π±ΡƒΠ½ΠΊΠ΅Ρ€Π΅ элСктроциклона отсутствуСт Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ΅ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠ΅, Ρ‚Π°ΠΊΠΆΠ΅ Π½Π΅Ρ‚ Ρ€Π°Π·Π²ΠΈΡ‚ΠΎΠ³ΠΎ тСчСния Π² области стСнок, Π° Π½ΠΈΠΆΠ΅ Π²Ρ‹Ρ…Π»ΠΎΠΏΠ½ΠΎΠ³ΠΎ отвСрстия ΡΠΊΠΎΡ€ΠΎΡΡ‚ΡŒ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π±Π»ΠΈΠ·ΠΊΠ° ΠΊ 0. Π­Ρ‚ΠΎ благоприятно сказываСтся Π½Π° эффСктивности очистки, Ρ‚. ΠΊ. выходящий чистый Π³Π°Π· Π½Π΅ ΡƒΠ²Π»Π΅ΠΊΠ°Π΅Ρ‚ с собой осСвшиС частицы. Π’Ρ‹Π²ΠΎΠ΄Ρ‹: 1) Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ° элСктроциклона ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ описана с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ матСматичСской ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈ рассчитана с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ МКЭ; 2) ΠΏΠΎΡ‚ΠΎΠΊ Π² элСктроциклонС, ΠΊΠ°ΠΊ ΠΈ оТидалось, ΠΈΠΌΠ΅Π΅Ρ‚ Π·Π°ΠΊΡ€ΡƒΡ‡Π΅Π½Π½ΡƒΡŽ структуру, ΡƒΠ³ΠΎΠ» Π·Π°ΠΊΡ€ΡƒΡ‚ΠΊΠΈ зависит ΠΎΡ‚ Π΄Π»ΠΈΠ½Ρ‹ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠΉ Π·ΠΎΠ½Ρ‹; 3) конструкция Π±ΡƒΠ½ΠΊΠ΅Ρ€Π° обСспСчиваСт Π²Ρ‹Ρ…ΠΎΠ΄ ΠΎΡ‡ΠΈΡ‰Π΅Π½Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° Π±Π΅Π· вовлСчСния Π² Π½Π΅Π³ΠΎ ΡƒΠ»ΠΎΠ²Π»Π΅Π½Π½Ρ‹Ρ… частиц

    Elektrocyclone hydrodynamic flow computation

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    Для Π°Π½Π°Π»ΠΈΠ·Π° Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π² элСктроциклонС ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ ΠΊΠΎΠΌΠΏΡŒΡŽΡ‚Π΅Ρ€Π½Ρ‹ΠΉ расчСт с использованиСм ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΊΠΎΠ½Π΅Ρ‡Π½Ρ‹Ρ… элСмСнтов (МКЭ). ГСомСтрия ΠΌΠΎΠ΄Π΅Π»ΠΈ соотвСтствуСт Π»Π°Π±ΠΎΡ€Π°Ρ‚ΠΎΡ€Π½ΠΎΠΌΡƒ элСктроциклону. Для расчСтов использована k-Ξ΅-модСль турбулСнтности. БистСма ΡƒΡ€Π°Π²Π½Π΅Π½ΠΈΠΉ Ρ€Π΅ΡˆΠ°Π΅Ρ‚ΡΡ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ° SIMPLE. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ расчСта Π΄Π°ΡŽΡ‚ ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Ρƒ распрСдСлСния скоростСй ΠΏΠΎΡ‚ΠΎΠΊΠ° ΠΈ Π»ΠΈΠ½ΠΈΠΉ Ρ‚ΠΎΠΊΠ° Π² Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… сСчСниях. На основании Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² дСлаСтся Π²Ρ‹Π²ΠΎΠ΄ ΠΎ Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ элСктроциклона. ВыявлСн Ρ„Π°ΠΊΡ‚, Ρ‡Ρ‚ΠΎ Π² Π±ΡƒΠ½ΠΊΠ΅Ρ€Π΅ элСктроциклона отсутствуСт Π²ΠΈΡ…Ρ€Π΅Π²ΠΎΠ΅ Π΄Π²ΠΈΠΆΠ΅Π½ΠΈΠ΅, Ρ‚Π°ΠΊΠΆΠ΅ Π½Π΅Ρ‚ Ρ€Π°Π·Π²ΠΈΡ‚ΠΎΠ³ΠΎ тСчСния Π² области стСнок, Π° Π½ΠΈΠΆΠ΅ Π²Ρ‹Ρ…Π»ΠΎΠΏΠ½ΠΎΠ³ΠΎ отвСрстия ΡΠΊΠΎΡ€ΠΎΡΡ‚ΡŒ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π±Π»ΠΈΠ·ΠΊΠ° ΠΊ 0. Π­Ρ‚ΠΎ благоприятно сказываСтся Π½Π° эффСктивности очистки, Ρ‚. ΠΊ. выходящий чистый Π³Π°Π· Π½Π΅ ΡƒΠ²Π»Π΅ΠΊΠ°Π΅Ρ‚ с собой осСвшиС частицы. Π’Ρ‹Π²ΠΎΠ΄Ρ‹: 1) Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ° элСктроциклона ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ описана с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ матСматичСской ΠΌΠΎΠ΄Π΅Π»ΠΈ ΠΈ рассчитана с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ МКЭ; 2) ΠΏΠΎΡ‚ΠΎΠΊ Π² элСктроциклонС, ΠΊΠ°ΠΊ ΠΈ оТидалось, ΠΈΠΌΠ΅Π΅Ρ‚ Π·Π°ΠΊΡ€ΡƒΡ‡Π΅Π½Π½ΡƒΡŽ структуру, ΡƒΠ³ΠΎΠ» Π·Π°ΠΊΡ€ΡƒΡ‚ΠΊΠΈ зависит ΠΎΡ‚ Π΄Π»ΠΈΠ½Ρ‹ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠΉ Π·ΠΎΠ½Ρ‹; 3) конструкция Π±ΡƒΠ½ΠΊΠ΅Ρ€Π° обСспСчиваСт Π²Ρ‹Ρ…ΠΎΠ΄ ΠΎΡ‡ΠΈΡ‰Π΅Π½Π½ΠΎΠ³ΠΎ Π³Π°Π·Π° Π±Π΅Π· вовлСчСния Π² Π½Π΅Π³ΠΎ ΡƒΠ»ΠΎΠ²Π»Π΅Π½Π½Ρ‹Ρ… частиц.To analyze the elektrocyclone flow hydrodynamic computer calculation using the finite element method (FEM) is applied. The geometry of the model corresponds to the laboratory elektrocyclone. The k-Ξ΅-turbulence model is used for the computation. The system of equations is solved by the SIMPLE algorithm. The calculation results give a pattern of the flow velocity distribution and the flow lines in the different sections. There is conclusion based on the results about the elektrocyclone flow hydrodynamic. Is elicited the fact that in the bunker of an electrocyclone there is no whirl, also there is no developed current in the field of walls, and below an exhaust opening the speed of a stream is close to 0.ИсслСдованиС ΠΏΡ€ΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΠΏΡ€ΠΈ финансовой ΠΏΠΎΠ΄Π΄Π΅Ρ€ΠΆΠΊΠ΅ ΠΌΠΎΠ»ΠΎΠ΄Ρ‹Ρ… ΡƒΡ‡Π΅Π½Ρ‹Ρ… Π£Ρ€Π€Π£ Π² Ρ€Π°ΠΌΠΊΠ°Ρ… Ρ€Π΅Π°Π»ΠΈΠ·Π°Ρ†ΠΈΠΈ ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΡ‹ развития Π£Ρ€Π€Π£

    Elektrocyclone hydrodynamic flow computation

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    To analyze the elektrocyclone flow hydrodynamic computer calculation using the finite element method (FEM) is applied. The geometry of the model corresponds to the laboratory elektrocyclone. k-Ξ΅-turbulence model is used for the computation. The system of equations is solved by SIMPLE algorithm. The calculation results give a pattern of the flow velocity distribution and flow lines in different sections. There is conclusion based on the results about elektrocyclone flow hydrodynamic.Для Π°Π½Π°Π»ΠΈΠ·Π° Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ ΠΏΠΎΡ‚ΠΎΠΊΠ° Π² элСктроциклонС ΠΏΡ€ΠΈΠΌΠ΅Π½Ρ‘Π½ ΠΊΠΎΠΌΠΏΡŒΡŽΡ‚Π΅Ρ€Π½Ρ‹ΠΉ расчСт с использованиСм ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΊΠΎΠ½Π΅Ρ‡Π½Ρ‹Ρ… элСмСнтов (МКЭ). ГСомСтрия ΠΌΠΎΠ΄Π΅Π»ΠΈ соотвСтствуСт Π»Π°Π±ΠΎΡ€Π°Ρ‚ΠΎΡ€Π½ΠΎΠΌΡƒ элСктроциклону. Для расчётов использована k-Ξ΅-модСль турбулСнтности. БистСма ΡƒΡ€Π°Π²Π½Π΅Π½ΠΈΠΉ Ρ€Π΅ΡˆΠ°Π΅Ρ‚ΡΡ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ Π°Π»Π³ΠΎΡ€ΠΈΡ‚ΠΌΠ° SIMPLE. Π Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ расчёта Π΄Π°ΡŽΡ‚ ΠΊΠ°Ρ€Ρ‚ΠΈΠ½Ρƒ распрСдСлСния скоростСй ΠΏΠΎΡ‚ΠΎΠΊΠ° ΠΈ Π»ΠΈΠ½ΠΈΠΉ Ρ‚ΠΎΠΊΠ° Π² Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹Ρ… сСчСниях. На основании Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΎΠ² дСлаСтся Π²Ρ‹Π²ΠΎΠ΄ ΠΎ Π³ΠΈΠ΄Ρ€ΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ элСктроциклона
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