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Endovascular treatment of a ruptured pseudoaneurysm of the internal carotid artery in a patient with nasopharyngeal cancer:A case report

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World Journal of Clinical Cases 2022年第25期10卷 9121-9126页

作者： jung-soo park Hyoung Gyu Jang Department of Neurosurgery Jeonbuk National University Medical School and HospitalJeonju 54907South Korea

BACKGROUND Radiation therapy(RT)for nasopharyngeal cancer can cause several complications.In rare cases,an internal carotid artery pseudoaneurysm can occur,which can be fatal.We report the experience of a nasopharyngeal cancer patient who underwent radiation therapy and subsequently developed a fatal pseudoaneurysm of the petrous internal carotid artery.CASE SUMMARY A 39-year-old man was diagnosed with nasopharyngeal cancer 2 years ago(American Joint Committee on Cancer Stage T3N2M0)and received concurrent chemoradiation therapy.He subsequently relapsed and received chemotherapy.One week after the 4th cycle of chemotherapy,he was admitted to the emergency room of our hospital because of massive epistaxis accompanied by a headache.A pseudoaneurysm of the petrous internal carotid artery was confirmed by digital subtraction angiography(DSA).Stent-assisted endovascular coil embolization was performed and complete occlusion was achieved.No pseudoaneurysm was observed on DSA after coil embolization;however,intermittent epistaxis was maintained even after coil embolization.After seven days,a diagnostic laryngoscopy was performed.Massive bleeding occurred after aspiration of the blood clot during the laryngoscopy and the patient died of hypovolemic shock.In this case,epistaxis may have been a sign of pseudoaneurysm;therefore,treatment such as embolization should be performed promptly,and careful management should be undertaken after treatment.CONCLUSION This case highlights a rare,serious complication of RT in nasopharyngeal cancer and how it should be recognized and treated.

关键词： Pseudoaneurysm Nasopharyngeal cancer Radiation therapy Epistaxis Carotid artery pseudoaneurysm Case report

Changes in peak inspiratory flow rate and peak airway pressure with endotracheal tube size during chest compression

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World Journal of Emergency Medicine 2020年第2期11卷 97-101页

作者： jung Wan Kim Jin Woong Lee Seung Ryu jung soo park Insool Yoo Yong Chul Cho Hong Joon Ahn Department of Emergency Medicine Chungnam National University HospitalJung-guDaejeonRepublic of Korea Department of Emergency Medicine College of MedicineChungnam National UniversityJung-guDaejeonRepublic of Korea

BACKGROUND:Adequate airway management plays an important role in high-quality cardiopulmonary resuscitation(CPR).Airway management is usually performed using an endotracheal tube(ETT)during CPR.However,no study has assessed the effect of ETT size on the fl ow rate and airway pressure during CPR.METHODS:We measured changes in peak inspiratory fl ow rate(PIFR),peak airway pressure(Ppeak),and mean airway pressure(Pmean)according to changes in ETT size(internal diameter 6.0,7.0,and 8.0 mm)and with or without CPR.A tidal volume of 500 mL was supplied at a rate of 10 times per minute using a mechanical ventilator.Chest compressions were maintained at a constant compression depth and speed using a mechanical chest compression device(LUCAS2,mode:active continuous,chest compression rate:102±2/minute,chest compression depth 2–2.5 inches).RESULTS:The median of several respiratory physiological parameters during CPR was significantly different according to the diameter of each ETT(6.0 vs.8.0 mm):PIFR(32.1 L/min[30.5–35.3]vs.28.9 L/min[27.5–30.8],P<0.001),Ppeak(48.84 cmH2O[27.46–52.11]vs.27.45 cmH2O[22.53–52.57],P<0.001),and Pmean(18.34 cmH2O[14.61–21.66]vs.13.66 cmH2O[8.41–19.24],P<0.001).CONCLUSION:The changes in PIFR,Ppeak,and Pmean were related to the internal diameter of ETT,and these values tended to decrease with an increase in ETT size.Higher airway pressures were measured in the CPR group than in the no CPR group.

关键词： Cardiopulmonary resuscitation Intratracheal intubation Airway pressure

Massive Hematochezia Following Blunt Trauma in a Patient with Crohn＇s Disease： Intraluminal Bleeding without Hemoperitoneum

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Chinese Medical Journal 2016年第2期129卷 246-247页

作者： jung soo park Jin Hong Min Jun Ho Kang Yong Nam In Department of Emergency Medicine College of Medicine Chungbuk National University Hospital Chungbuk Korea

To the Editor： A 29-year-old woman arrived via ambulance to the emergency department with hematochezia 1 h after sustaining blunt abdominal trauma as a passenger in a traffic accident. The patient also had Crohn＇s d... 详细信息

关键词： Crohn病出血创伤和损伤腹腔积血腹痛抗原 CD 体格检查胃肠出血

Epidural chloroma and spinal cord compression

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Chinese Medical Journal 2019年第7期132卷 853-855页

作者： Hyun jung Koh jungwon Baek Min soo Lee Hue jung park Department of Anesthesiology and Pain Medicine Seoul St.Mary's HospitalCollege of MedicineThe Catholic University of KoreaSeoul 06591Korea

To the Editor:Chloroma is a rare solid tumor that was formed sometimes from malignant myeloid blast cells outside the hematopoietic system;these are known as chloroma or granulocytic sarcoma[1]Chloroma can be diagnosed anywhere outside of the hematopoietic system,such as the head and neck,skeletal system,breast,uterus,and central nervous system.[2]This tumor is common in leukemic patients.[3]Chloroma presents as an epidural mass resulting in spinal cord compression with neurologic symptoms.[4]Spinal lesions occur most frequently at the thoracic level;however,the most common primary symptoms are low back pain and radiating pain in the legs[5].

关键词： Epidural chloroma spinal cord compression hematopoietic system

Incidence, prevalence and risk of stroke in patients with Takayasu arteritis: a nationwide population-based study in South Korea

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Stroke & Vascular Neurology 2022年第2期7卷 149-157页

作者： Sung soo Ahn Minkyung Han Yong-Beom park Inkyung jung Sang-Won Lee Department of Internal Medicine Yongin Severance HospitalYonsei University College of MedicineYonginSouth Korea Biostatistics Collaboration Unit Department of Biomedical Systems InformaticsYonsei University College of MedicineSeoulSouth Korea Division of Rheumatology Department of Internal MedicineYonsei University College of MedicineSeoulSouth Korea Institute for Immunology and Immunological Diseases Yonsei University College of MedicineSeoulSouth Korea Division of Biostatistics Department of Biomedical Systems InformaticsYonsei University College of MedicineSeoulSouth Korea

Background Takayasu arteritis(TAK)is a disease associated with increased risk of cardiovascular complications.We aimed to evaluate the incidence,prevalence and risk of stroke in patients with TAK.Methods Data from 1065 patients were obtained from a national database(2010–2018).The annual incidence and prevalence per 100000 persons were estimated using the registration population in the midst of every year,and the standardised incidence ratio(SIR)of stroke was compared with the general population based on the data from the 2006 national report for cardiovascular and cerebrovascular diseases.Age-adjusted incidence rate ratio(IRR)of stroke based on the time interval after diagnosis was also calculated.A time-dependent Cox regression was conducted to investigate predictive factors of stroke.Results The overall incidence rate of TAK ranged between 0.2 and 0.3/100000 person-years annually;the prevalence of TAK gradually increased,reaching 3.25/100000 person-years in 2018.Seventy-three(6.9%)patients experienced stroke during follow-up,and the risk of developing stroke was higher than the general population(overall SIR 7.39,95%CI 5.79 to 9.29;men:SIR 5.70,95%CI 2.84 to 10.20;women:SIR 7.06,95%CI 5.41 to 9.05).Most stroke events(90.9%)were cerebral infarction for men,whereas the proportion of cerebral infarction was lower(62.9%)in women.Over half of stroke events occurred within 6 months after diagnosis,and stroke was more common within 6 months of diagnosis compared with after 3 years in women(IRR 13.46,95%CI 6.86 to 26.40).In Cox regression analysis,age was the sole predictor of stroke(adjusted HR 1.02,95%CI 1.00 to 1.04,p=0.043).Conclusions The annual incidence of TAK was similar to the previous studies from Asia,and the risk of stroke increased in TAK.Different patterns of subtype and incidence of stroke were found according to sex,although age was the only predictor.

关键词： prevalence patients diagnosis

Unexpected Pulmonary Events during Endotracheal Intubation in a Pediatric Patient

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Chinese Medical Journal 2017年第18期130卷 2263-2264页

作者： Hue jung park Haewon Chung Min soo Lee Hyun jung Koh Department of Anesthesiology and Pain Medicine Seoul St. Mary's Hospital College of Medicine The Catholic University of Korea Seoul 06591Republic of Korea

Nearly 21% of pediatric surgical operations are accompanied by adverse events,12.8% of which are respiratory complications including bronchospasm （1.2%） and pulmonary edema （11%）. Among them,aspiration pneumonia and negative-pressure pulmonary edema are rare pulmonary complications in pediatrics.However,they are difficult to predict and can be fatal if not appropriately treated;careful monitoring is required.We present a case of pulmonary complication secondary to aggravation of bronchial spasm during intubation of a pediatric patient.

关键词： Aspiration Bronchial Spasm Intubation Pneumonia

Intrinsic electrochemical activity of Ni in Ni_(3)Sn_(4) anode accommodating high capacity and mechanical stability for fast-charging lithium-ion batteries

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Journal of Energy Chemistry 2022年第8期31卷 470-477,I0013页

作者： Janghyuk Moon Trung Dinh Hoang Seong soo park Seowan park Dong Young Rhee Junwon Lee Sang A Han Min-Sik park jung Ho Kim School of Energy Systems Engineering Chung-Ang UniversityHeukseok-RoDongjak-guSeoul 06974Republic of Korea Department of Advanced Materials Engineering for Information and Electronics Integrated Education Institute for Frontier Science&Technology(BK21 Four)Kyung Hee University1732 Deogyeong-daeroGiheung-guYongin 17104Republic of Korea Institute for Superconducting&Electronic Materials(ISEM) Australian Institute of Innovative Materials(AIIM)University of WollongongInnovation CampusSquires WayNorth WollongongNSW 2500Australia

Fast interfacial kinetics derived from bicontinuous three-dimensional(3D)architecture is a strategic feature for achieving fast-charging lithium-ion batteries(LIBs).One of the main reasons is its large active surface and short diffusion path.Yet,understanding of unusual electrochemical properties still remain great challenge due to its complexity.In this study,we proposed a nickel–tin compound(Ni_(3)Sn_(4))supported by 3D Nickel scaffolds as main frame because the Ni_(3)Sn_(4) clearly offers a higher reversible capacity and stable cycling performance than bare tin(Sn).In order to verify the role of Ni,atomic-scale simulation based on density functional theory systematically addressed to the reaction mechanism and structural evolution of Ni_(3)Sn_(4) during the lithiation process.Our findings are that Ni enables Ni_(3)Sn_(4) to possess higher mechanical stability in terms of reactive flow stress,subsequently lead to improve Li storage capability.This study elucidates an understanding of the lithiation mechanism of Ni_(3)Sn_(4) and provides a new perspective for the design of high-capacity and high-power 3D anodes for fast-charging LIBs.

关键词： Lithium-ion batteries Ni_(3)Sn_(4) High-capacity anode 3D-structured electrode Inverse opal structure Density functional theory

Microstructure and corrosion resistance of a Mg2Sn-dispersed Mg alloy subjected to pulsed electron beam treatment

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Journal of Magnesium and Alloys 2020年第2期8卷 345-351页

作者： Daseul Lee Beomcheol Kim soo-Min Baek Jisoo Kim Hyung Wook park jung Gu Lee Sung soo park School of Materials Science and Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of Mechanical Aerospace and Nuclear EngineeringUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea School of Materials Science and Engineering University of UlsanUlsan 44610Republic of Korea

We report that the corrosion resistance of a Mg-Sn-based alloy with MgzSn precipitates can be considerably improved by surface modification using pulsed electron beam treatment.The alloy subjected to a pulse electron beam treatment showed a modified surface layer with a thickness of〜12 μm,appearing more resistant to corrosion attack than the bare surface of the alloy.In 0.6 M NaCl solution,the alloys with and without the surface modification exhibited average corrosion rates of 4.3 and 8.1 mm y^-1,respectively.The improved corrosion resistance was attributed to reduced cathodic activation,resulting from the surficial reduction of relatively noble Mg2Sn precipitates.

关键词： Magnesium alloy Mg2Sn Intermetallic compound Pulsed electron beam treatment Corrosion

Dual-frequency piezoelectric micromachined ultrasound transducer based on polarization switching in ferroelectric thin films

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Microsystems & Nanoengineering 2023年第5期9卷 233-243页

作者： Jin soo park soo Young jung Dong Hun Kim jung Ho park Ho Won Jang Tae Geun Kim Seung-Hyub Baek Byung Chul Lee Bionics Research Center Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea Center for Electronic Materials Korea Institute of Science and TechnologySeoul 02792Republic of Korea Department of Material Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Division of Bio-Medical Science and Technology KIST SchoolUniversity of Science and Technology(UST)Seoul 02792Republic of Korea KHU-KIST Department of Converging Science and Technology Kyung Hee UniversitySeoul 02447Republic of Korea

Due to its additional frequency response,dual-frequency ultrasound has advantages over conventional ultrasound,which operates at a specific frequency band.Moreover,a tunable frequency from a single transducer enables sonographers to achieve ultrasound images with a large detection area and high resolution.This facilitates the availability of more advanced techniques that simultaneously require low-and high-frequency ultrasounds,such as harmonic imaging and image-guided therapy.In this study,we present a novel method for dual-frequency ultrasound generation from a ferroelectric piezoelectric micromachined ultrasound transducer(PMUT).Uniformly designed transducer arrays can be used for both deep low-resolution imaging and shallow high-resolution imaging.To switch the ultrasound frequency,the only requirement is to tune a DC bias to control the polarization state of the ferroelectric film.Flextensional vibration of the PMUT membrane strongly depends on the polarization state,producing low-and high-frequency ultrasounds from a single excitation frequency.This strategy for dual-frequency ultrasounds meets the requirement for either multielectrode configurations or heterodesigned elements,which are integrated into an array.Consequently,this technique significantly reduces the design complexity of transducer arrays and their associated driving circuits.

关键词： piezoelectric ferroelectric enable