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Treatment of isolated and recurrent tracheoesophageal fistula in children: a case series and literature review

World Journal of Pediatric Surgery 2021年第4期4卷 52-56页

作者： Aleh Sautin Kiryl Marakhouski Aleh Pataleta Aliaksandr Svirsky Vasili Averyn Diagnostic Division Republican Scientific and Practical Center of Pediatric SurgeryMinskBelarus Department of Pediatric Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinskBelarus Department of Pediatric Surgery Belarusian State Medical UniversityMinskBelarus

Background Despite improvements in the treatment of esophageal atresia with tracheoesophageal fistula(TEF)in recent decades,complications still exist.The rate of fistula recanalization after surgical repair is~5%in large cohorts.However,there is controversy regarding the gold standard of treatment.This research aimed to evaluate the efficacy of treatment of pediatric patients with isolated(H-type)and recurrent TEF in our clinic.Methods We retrospectively analyzed 12 patients(7 boys,5 girls)aged 35 days-14.6 years.The median age of our patients was 632 days[95%CI(confident interval)120.1 to 2118.7];the mean birth weight was 2713 g(95%CI 2258 to 3169;median:2763 g);and the mean gestational age was 37.1 weeks(95%CI 35.4 to 38.8;median:37 weeks).All patients were managed for isolated or recurrent TEF between January 1,2015 and December 31,2020 using endoscopy(laser de-epithelialization).Results Laser de-epithelialization alone was effective in 8 of 12 patients(66.67%),with a mean number of de-epithelializations of 2.25(range:1-4).After one attempt at de-epithelialization,success was achieved in only two patients(n=16.67%).The mortality rate was 0%.The median follow-up for patients who received endoscopic treatment exclusively(n=8)was 3.7 years(95%CI 1.38 to 4.87)after the last stage of de-epithelialization.Conclusion Flexible endoscopy is an alternative treatment to open surgical repair of isolated and recurrent TEF in children.The effectiveness of endoscopic laser de-epithelialization alone with subsequent fistula obliteration was 66.7%,with a median follow-up of 3.7 years.

关键词： fistula mortality alone

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Balloon dilation of congenital perforated duodenal web in newborns: Evaluation of short and long-term results

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World Journal of Gastrointestinal Endoscopy 2024年第6期16卷 343-349页

作者： Kirill marakhouski Elena Malyshka Katsiaryna Nikalayeva Larysa Valiok Aleh Pataleta kiryl Sanfirau Aliaksandr Svirsky Vasily Averin Division of Diagnostic Republican Scientific and Practical Centre of Paediatric SurgeryMinsk 220113Belarus Department of Newborn Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Department of Pediatric Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Division of Diagnostic Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus Academic Chair of Pediatric Surgery Belarusian State Medical UniversityMinsk 220116Belarus

BACKGROUND Incomplete congenital duodenal obstruction(ICDO)is caused by a congenitally perforated duodenal web(CPDW).Currently,only six cases of balloon dilatation of the PDW in newborns have been described.AIM To present our experience of balloon dilatation of a perforated duodenal memb-rane in newborns with ICDO.METHODS Five newborns who underwent balloon dilatation of the CPDW along a prein-stalled guidewire between 2021 and 2023 were included.Nineteen newborns diagnosed with ICDO who underwent laparotomy were included in the control group.RESULTS In all cases,good anatomical and clinical results were obtained.In three cases,a follow-up study was conducted after 1 year.The average time to start enteral feeding per os was significantly earlier in the study group(4.4 d)than in the laparotomic group(21.2 days;P<0.0001).The time spent by patients in the intensive care unit and hospital after balloon dilatation was also significantly shorter.We determined the selection criteria for possible and effective CPDW balloon dilatation in newborns as follows:(1)Presence of dynamic radiographic signs of the passage of a radiopaque substance beyond the zone of narrowing or radiographic signs of pneumatisation of the duodenum and small bowel distal to the web;(2)presence of endoscopic signs of CPDW;(3)successful cannulation with a guidewire performed parallel to the endoscope,with holes in the congenital duodenal web;and(4)successful positioning of the balloon performed along a freestanding guidewire on the web.CONCLUSION Strictly following selection criteria for newborns with ICDO caused by CPDW ensures that endoscopic balloon dilatation using a pre-installed guidewire is safe and effective and shows good 1-year follow-up results.

关键词： Newborns Congenital duodenal obstruction Perforated duodenal membrane Endoscopy Balloon dilation

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Endoscopic treatment of blue rubber bleb nevus syndrome in a 4-year-old girl with long-term follow-up:A case report

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World Journal of Gastrointestinal Endoscopy 2021年第3期13卷 90-96页

作者： Kirill marakhouski Elena Sharafanovich Uladzislau Kolbik Aleh Sautin Katsiaryna Nikalayeva Aleh Pataleta kiryl Sanfirau Aliaksandr Svirsky Diagnostic Division Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220113Belarus Department of Elective Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220113Belarus Department of Pediatric Surgery Republican Scientific and Practical Center of Pediatric SurgeryMinsk 220013Belarus

BACKGROUND Blue rubber bleb nevus syndrome(BRBNS)is a rare vascular disease,difficult to diagnose and choose a treatment method,especially in young children.There are several limiting factors to the use of enteroscopy for diagnostics and treatment in pediatric patients,in general.The literature on BRBNS cases is limited and presents various therapeutic approaches.CASE SUMMARY We present here a case of BRBNS involving a 4-year-old female,whose intestinal venous lesions were successfully treated by endoscopic sclerotherapy and aethoxysklerol foam.Skin lesions,typical for BRBNS,appeared on the 8th d of the child’s life and their number increased over the next several months.The child also experienced episodes of critical decrease in hemoglobin level(by as much as 52 g/L)for several years,requiring iron supplementation and several blood transfusions.Video capsule endoscopy revealed numerous vascular formations in the small bowel.The combined findings of gastrointestinal venous formations and skin lesions prompted BRBNS diagnosis.Single-balloon enteroscopy was used to perform sclerotherapy,with aethoxysklerol foam.A positive effect was observed within 19 mo of follow-up.We continue to monitor the patient’s hemoglobin level,every 2 wk,and it has remained satisfactory(>120 g/L).CONCLUSION Endoscopic sclerotherapy can be effective in the clinical management of gastrointestinal manifestations of BRBNS in young children.

关键词： Blue rubber bleb nevus syndrome Bean syndrome Single-balloon enteroscopy Children Vascular malformations Gastrointestinal tract Sclerotherapy Aethoxysklerol foam Case report

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As-cast and extruded Mg-Zn-Ca systems for biodegradable implants:Characterization and corrosion behavior

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Journal of Magnesium and Alloys 2023年第3期11卷 1102-1120页

作者： Lara Moreno Endzhe Matykina kiryl A.Yasakau Carsten Blawert Raul Arrabal Marta Mohedano Departamento de Ingeniería Química y de Materiales Facultad de Ciencias QuímicasUniversidad Complutense de Madrid28040 MadridSpain Department of Materials and Ceramic Engineering CICECO-Aveiro institute of materialsUniversity of Aveiro3810-193 AveiroPortugal Institute of Surface Science Helmholtz-Zentrum HereonMax-Planck Strasse 1Geesthacht 21502Germany

The aim of the present study is to evaluate the effect of alloy processing and composition as well as the pH control and testing medium on the in vitro corrosion performance of Mg-Zn-Ca systems for biodegradable implants.The grain size and secondary phases were analyzed by optical microscopy,scanning electron microscopy,transmission electron microscopy,and X-ray diffraction.Scanning kelvin probe force microscopy(SKPFM)was used to analyze the Volta potential values of the second phases.The corrosion performance of the three alloys was evaluated by electrochemical and hydrogen evolution methods inα-MEM with and without organic species(i.***.complete and inorganicα-MEM).Two strategies were followed to evaluate the influence of the pH on the corrosion behavior:daily solution replacement and CO_(2)flow based pH control.For all the materials,the organic medium accelerates the corrosion process.Constant pH maintained by CO_(2)flow through the medium results in considerably higher corrosion rates for all alloys.The impact of pH is lesser on the as-cast alloys due to the barrier effect of the secondary phases,particularly pronounced in the Mg1Zn1Ca alloy which showed the lowest corrosion rate.The wrought Mg0.5Zn0.2Ca alloy that lacks the refined secondary phase network and exhibits high number of twins undergoes accelerated uniform corrosion under constant pH conditions.

关键词： MgZnCa Magnesium Biomaterials Characterization Corrosion

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BELARUS AND CHINA:FROM TRADE TO INVESTMENTS

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China's Foreign Trade 2008年第23期 52-55页

作者： kiryl RUDY Commercial Counselor of the Embassy of the Republic of Belarus to the People's Republic of China Ph.D.

The diplomatic relations between Belarus and China have been developing stably and successfully ever since the moment of their establishing (January 1992).

关键词：中国白俄罗斯对外贸易投资

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Wide-field three-photon excitation in biological samples

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Light(Science & Applications) 2016年第1期5卷 65-73页

作者： Christopher J Rowlands Demian Park Oliver T Bruns kiryl D Piatkevich Dai Fukumura Rakesh K Jain Moungi G Bawendi Edward S Boyden Peter TC So Department of Biological Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Media Lab Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Chemistry Massachusetts Institute of TechnologyCambridgeMA 02139USA Edwin L.Steele Laboratories Department of Radiation OncologyMassachusetts General Hospital and Harvard Medical SchoolBostonMA 02114USA Department of Brain and Cognitive Sciences McGovern Institute and MIT Center for Neurobiological EngineeringMassachusetts Institute of TechnologyCambridgeMA 02139-4307USA Department of Mechanical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Three-photon wide-field depth-resolved excitation is used to overcome some of the limitations in conventional point-scanning two-and three-photon microscopy.Excitation of chromophores as diverse as channelrhodopsins and quantum dots is shown,and a penetration depth of more than 700μm into fixed scattering brain tissue is achieved,approximately twice as deep as that achieved using two-photon wide-field excitation.Compatibility with live animal experiments is confirmed by imaging the cerebral vasculature of an anesthetized mouse;a complete focal stack was obtained without any evidence of photodamage.As an additional validation of the utility of wide-field three-photon excitation,functional excitation is demonstrated by performing threephoton optogenetic stimulation of cultured mouse hippocampal neurons expressing a channelrhodopsin;action potentials could reliably be excited without causing photodamage.

关键词： biophotonics multiphoton microscopy optogenetics temporal focusing three-photon

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