A Multimodal Approach to Analgesia in Anorectal Surgery

Аim: Evaluation of methods for pain prevention and pain reduction after anorectal surgery at all stages of treatment based on publications found in available databases.Key points. Most anorectal diseases are benign and do not affect life expectancy, meanwhile about 40 % of the population suffer from it. Mainly anorectal disorders affect middle-aged people reducing their life quality. At the same time many articles aimed at studying only postoperative anesthesia. 2 researchers independently searched for articles published in Medline, Scopus, Cochrane, Web of Science, E-library databases using keywords. A total of 54 publications were included. A multimodal approach should include the pain prevention during pre-, intra- and postoperative periods. Acetaminophen is recommended for pain reduction according to the dosing protocols. Acetaminophen combined with other systemic analgesics is advisable for patients with severe pain. The opioids use is justified only for moderate-severe postoperative pain. Metronidazole and lidocaine with nitroglycerin ointment/ nifedipine/сorticosteroids effectiveness has been proven for local postoperative anesthesia. Prophylactic use of antibiotics and bowel preparation do not reduce postoperative pain. Stool softeners are recommended for reducing postoperative pain severity. Additional local anesthesia such as nerve blockade or infiltration anesthesia is recommended for all patients. Modern minimally invasive treatment methods of hemorrhoid are associated with less severe postoperative pain.Conclusion. The recommended scheme of multimodal anesthesia for patients after anorectal surgery is shown on Fig.1. Further studies are needed to evaluate preoperative anesthesia effectiveness, the feasibility of the perioperative flavonoids use, as well as comparisons of various minimally invasive treatment methods of anorectal diseases

Catalytic sulfation of betulin with sulfamic acid : experiment and DFT calculation

Betulin is an important triterpenoid substance isolated from birch bark, which, together with its sulfates, exhibits important bioactive properties. We report on a newly developed method of betulin sulfation with sulfamic acid in pyridine in the presence of an Amberlyst(®)15 solid acid catalyst. It has been shown that this catalyst remains stable when being repeatedly (up to four cycles) used and ensures obtaining of sulfated betulin with a sulfur content of ~10%. The introduction of the sulfate group into the betulin molecule has been proven by Fourier-transform infrared, ultraviolet-visible, and nuclear magnetic resonance spectroscopy. The Fourier-transform infrared (FTIR) spectra contain absorption bands at 1249 and 835–841 cm(−1); in the UV spectra, the peak intensity decreases; and, in the nuclear magnetic resonance (NMR) spectra, of betulin disulfate, carbons С3 and С28 are completely shifted to the weak-field region (to 88.21 and 67.32 ppm, respectively) with respect to betulin. Using the potentiometric titration method, the product of acidity constants K(1) and K(2) of a solution of the betulin disulfate H(+) form has been found to be 3.86 × 10(–6) ± 0.004. It has been demonstrated by the thermal analysis that betulin and the betulin disulfate sodium salt are stable at temperatures of up to 240 and 220 °C, respectively. The density functional theory method has been used to obtain data on the most stable conformations, molecular electrostatic potential, frontier molecular orbitals, and mulliken atomic charges of betulin and betulin disulfate and to calculate the spectral characteristics of initial and sulfated betulin, which agree well with the experimental data

Spatial Data Analysis Based on the Results of a Set of Observations of Deformation Processes Performed Using Strain Gauges

Данная статья посвящена вопросам наблюдения за деформациями конструкций уникальных объектов. В статье рассматривается анализ пространственных данных, полученных с использованием тензометрических датчиков, приведен расчет нагрузок, воспринимаемых конструкцией. Кроме того, приводится сопоставление тензометрических данных с величинами деформаций, полученными посредством геодезических методов.This article is devoted to the issues of observation and analysis of deformations of structures of unique objects. The article discusses the analysis of spatial data obtained using strain gauges, the calculation of loads perceived by the structure. In addition, the article presents a comparison of strain gauge data with the values of deformations obtained by geodetic methods

Technical Monitoring of Coating Structures of High-Critical Structures During Operation

Для обеспечения безопасности, эксплуатационной надежности уникальных и технически сложных объектов строительства необходимо производство систематических наблюдений контролируемых параметров для выявления отклонений и выполнение анализа степени опасности — все это производится в рамках технического мониторинга. В данной статье описывается производство систематических наблюдений контролируемых параметров, в которые входят наблюдения прогиба ферм в период эксплуатации, а также анализ мониторинга покрытия кровли аэровокзального комплекса.To ensure the safety, operational reliability of unique and technically complex construction projects, it is necessary to make systematic observations of controlled parameters to identify deviations and an analysis of the degree of danger — all this is done as part of technical monitoring. This article describes the production of systematic observations of controlled parameters, which include observations of trusses deflection during operation, as well as an analysis of the monitoring of the roofing of the air terminal complex

Проблема раннего восстановления удержания мочи после радикальной простатэктомии

Background. The highest rate of incontinence after radical prostatectomy (RP) is observed in the first 2–6 months after surgery. In order  to decrease the period of incontinence, virous surgical methods aimed at preservation and reconstruction of structures participating  in the mechanism of urine retention has been developed and improved.The study objective is to evaluate effectiveness of an original method of formation of an urethral anastomosis in the early continence recovery.Materials and methods. Data on 126 patients who underwent retropubic RP were analyzed. Depending on the method of urethral anastomosis formation, patients were divided into 2 groups: in the 1st group (n = 52) the patients underwent PR with urethra suspension m. levator ani, in the 2nd (n = 74) – standard RP. In the 1st group, 6 ligatures were applied to the anterior and posterior urethra walls: at the 12 and 6 hour projections through the mucosa, submucosa, and smooth muscle; at the 10, 2, 4, and 8 hour projections – more laterally with capture of the m. levator ani medial margins. Continence recovery was evaluated on days 1, 7, and 14 after urinary catheter removal and then at days 30, 90, 180, and 365 after RP. The criteria of continence were absence of urine leakage at rest and during physical activity and a necessity of using a safety liner.Results. There weren’t any significant differences at day 1 after urinary catheter removal between the two groups (р > 0.05). In the 1st group, continence values at days 30, 90, and 180 after RP were significantly higher (57.7, 69.2, and 71.1 %, respectively) compared to the 2nd group (35.1, 41.9, and 51.3 %, respectively) (р <0.05).Conclusion. Results of this work show significant benefits of RP with urethra suspension m. levator ani compared to standard RP per continence recovery criteria at days 7, 14, 30, 90, and 180 after the surgery. The technique of urethra suspension m. levator ani is easy to perform and ensures early continence recovery after RP.Введение. Часто недержание мочи после выполнения радикальной простатэктомии (РПЭ) регистрируют в первые 2–6 мес после оперативного вмешательства. В целях сокращения периода инконтиненции разработаны и усовершенствованы различные хирургические методы, направленные на сохранение и восстановление структур, участвующих в механизме удержания мочи.Цель работы – оценить эффективность применения оригинального метода формирования уретроцистоанастомоза в раннем восстановлении функции удержания мочи.Материалы и методы. Проанализированы данные 126 пациентов, подвергнутых позадилонной РПЭ. В зависимости от метода формирования уретроцистоанастомоз больные были разделены на 2 группы: пациентам 1-й группы (n = 52) выполнена РПЭ с суспензией уретры m. levator ani, 2-й (n = 74) – стандартная РПЭ. В 1-й группе на переднюю и заднюю стенки уретры накладывали 6 лигатур: в проекции 12 и 6 ч условного циферблата через слизистую, подслизистую оболочки и гладкомышечный слой; на 10, 2, 4 и 8 ч – более латерально с захватом медиальных краев m. levator ani. Восстановление функции удержания мочи оценивали через 1, 7 и 14 сут с момента удаления уретрального катетера и далее через 30, 90, 180 и 365 сут после проведения РПЭ. Критерием удержания мочи служило отсутствие подтекания мочи в покое или при физической нагрузке и необходимости использования страховочной прокладки.Результаты. Достоверных различий в показателях удержания мочи на 1-е сутки после удаления уретрального катетера в обеих группах не выявлено (р >0,05). В 1-й группе показатели континенции через 30, 90 и 180 сут после выполнения РПЭ были достоверно выше (57,7; 69,2 и 71,1 % соответственно) по сравнению со 2-й группой (35,1; 41,9 и 51,3 % соответственно) (р <0,05). Заключение. Результаты настоящей работы демонстрируют значительные преимущества РПЭ с суспензией уретры m. levator ani по сравнению со стандартной РПЭ по показателю восстановления континенции на 7, 14, 30, 90 и 180-е сутки после операции. Техника суспензии уретры m. levator ani проста в выполнении и обеспечивает восстановление функции удержания мочи в более ранние сроки после РПЭ

Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN.

We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy analyzed by a high-resolution MAC-E filter. A fit of the integrated electron spectrum over a narrow interval around the kinematic end point at 18.57 keV gives an effective neutrino mass square value of (-1.0_{-1.1}^{+0.9})  eV^{2}. From this, we derive an upper limit of 1.1 eV (90% confidence level) on the absolute mass scale of neutrinos. This value coincides with the KATRIN sensitivity. It improves upon previous mass limits from kinematic measurements by almost a factor of 2 and provides model-independent input to cosmological studies of structure formation

A Helicity-Based Method to Infer the CME Magnetic Field Magnitude in Sun and Geospace: Generalization and Extension to Sun-Like and M-Dwarf Stars and Implications for Exoplanet Habitability

Patsourakos et al. (Astrophys. J. 817, 14, 2016) and Patsourakos and Georgoulis (Astron. Astrophys. 595, A121, 2016) introduced a method to infer the axial magnetic field in flux-rope coronal mass ejections (CMEs) in the solar corona and farther away in the interplanetary medium. The method, based on the conservation principle of magnetic helicity, uses the relative magnetic helicity of the solar source region as input estimates, along with the radius and length of the corresponding CME flux rope. The method was initially applied to cylindrical force-free flux ropes, with encouraging results. We hereby extend our framework along two distinct lines. First, we generalize our formalism to several possible flux-rope configurations (linear and nonlinear force-free, non-force-free, spheromak, and torus) to investigate the dependence of the resulting CME axial magnetic field on input parameters and the employed flux-rope configuration. Second, we generalize our framework to both Sun-like and active M-dwarf stars hosting superflares. In a qualitative sense, we find that Earth may not experience severe atmosphere-eroding magnetospheric compression even for eruptive solar superflares with energies ~ 10^4 times higher than those of the largest Geostationary Operational Environmental Satellite (GOES) X-class flares currently observed. In addition, the two recently discovered exoplanets with the highest Earth-similarity index, Kepler 438b and Proxima b, seem to lie in the prohibitive zone of atmospheric erosion due to interplanetary CMEs (ICMEs), except when they possess planetary magnetic fields that are much higher than that of Earth.Comment: http://adsabs.harvard.edu/abs/2017SoPh..292...89

Синдром обструктивного апноэ как фактор риска развития послеоперационных осложнений у пациентов с ожирением

Introduction. Early detection of patients with obstructive sleep apnea syndrome (OSAS) using preoperative screening is necessary to reduce risks in the perioperative period.The objective was to assess the effect of OSAS on the perioperative management of patients.Methods and materials. 54 patients with a BMI of more than 30 kg/m2 were examined, for whom a bariatric operation was performed as planned. Before the operation, all patients underwent respiratory polygraph with the calculation of the apnea/ hypopnea index (AHI), mean saturation (SpO2 m) during sleep and spirometry.Results. Patients were divided into 2 groups according to AHI: gr. 1 (n=33) with AHI<15/hour, OSAS, gr. 2 (n=21) with a AHI ≥15/hour. In gr. 2 VC and FVC should be significantly lower than in gr. 1 (p<0.01). A significant decrease in SpO2 m was noted (p<0.001). On the first day after the operation, there was an increase in pCO2 of arterial blood in gr. 2, in comparison with gr. 1 (p<0.05).Conclusions. OSAS can be considered as an independent adverse risk factor for potential perioperative complications. Early detection of OSAS will reduce the risks of postoperative complications.Введение. Раннее выявление пациентов с синдромом обструктивного апноэ во сне (СОАС) с помощью предоперационного скрининга необходимо для снижения рисков в периоперационном периоде.Цель – оценить влияние СОАС на периоперационное ведение пациентов.Методы и материалы. Были обследованы 54 пациента с индексом массы тела (ИМТ) более 30 кг/м2 , направленных на бариатрическую операцию. Всем пациентам перед операцией выполнена респираторная полиграфия с расчетом индекса апноэ/гипопноэ (ИАГ), средней сатурации (SpO2 ср) во время сна и спирометрия.Результаты. Пациенты были разделены на две группы по ИАГ: гр. 1 (n=33) с ИАГ <15/ч, СОАС, гр. 2 (n=21) с ИАГ ≥15/ч. В гр. 2 жизненная емкость легких и форсированная жизненная емкость легких к должному были достоверно ниже, чем в гр. 1 (р<0,01). Отмечалось достоверно значимое снижение SpO2 ср (р<0,001). В 1-е сутки после операции отмечалось нарастание рСО2 артериальной крови в гр. 2 по сравнению с гр. 1 (р<0,05).Заключение. СОАС можно рассматривать как независимый неблагоприятный фактор риска потенциальных периоперационных осложнений. Заблаговременное выявление СОАС позволит снизить риски развития послеоперационных осложнений

Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.

PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks