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The"weekend effect"does not impact on outcome of trauma laparotomy–Experience from a level 1 trauma centre in New Zealand

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Chinese Journal of Traumatology 2023年第2期26卷 73-76页

作者： jonathan ko Victor kong Janet Amey Damien Ah Yen Damian Clarke Grant Christey Department of Surgery University of AucklandAucklandNew Zealand Department of Trauma Waikato HospitalHamiltonNew Zealand Department of Surgery University of the WitwatersrandJohannesburgSouth Africa Te Manawa Taki Trauma System WaikatoNew Zealand

Purpose:Trauma centres have been proven to provide better outcomes in developed countries for overall trauma,but there is limited literature on the systematic factors that describe any discrepancies in outcomes for trauma laparotomies in these *** study was conducted to examine and interrogate the effect of systematic factors on patients undergoing a trauma laparotomy in a developed country,intending to identify potential discrepancies in the ***:This was a retrospective study of all laparotomies performed for trauma at a level 1 trauma centre in New *** adult patients who had undergone an index laparotomy for trauma between February 2012 and November 2020 were identified and laparotomies for both blunt and penetrating trauma were *** laparotomies and trauma laparotomies in children were *** primary clinical outcomes reviewed included morbidity,length of hospital stay,and *** statistical analysis was performed using R ***:During the 9-year study period,204 trauma laparotomies were performed at Waikato *** majority(83.3%)were performed during office hours(170/204),and the remaining 16.7%were performed after hours(34/204).And 61.3%were performed on a weekday(125/204),whilst 38.7%were performed on the weekend/public holiday(79/204).Most of the parameters in office hours and after hours groups had no statistically significant difference,except lactate(p=0.026).Most of the variables in weekday and weekend groups had no statistically significant difference,except pH,lactate,length of stay,and gastrointestinal complications(p=0.012,p<0.001,p=0.003,p=0.020,respectively).Conclusion:The current trauma system at Waikato hospital is capable of delivering care for trauma laparotomy patients with the same outcome regardless of working hours or after hours,weekday or *** confirms the importance of a robust trauma system capable of responding to the sudden demands placed on it.

关键词： Wounds and injuries General surgery Trauma surgery Abdominal trauma Systematic factors

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Microwave Synthesis of Silver Nanoparticles Using Different Pentose Carbohydrates as Reducing Agents

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Journal of Chemistry and Chemical Engineering 2018年第1期12卷 1-10页

作者： David S. Chung Hanna Kim jonathan ko Justine Lee Bryant Hwang Sohyun Chang ByungJun Kim Sung-Jae Chung Division of Biology and Medicine Brown University Providence R102912 USA Granada Hill Charter High School Granada Hills CA 91344 USA Thomas Jefferson High School for Science and Technology Alexandria VA 22312 USA Langley High School Mclean VA 2210 USA Department of Biology School of Arts & Sciences Johns Hopkins University Baltimore MD 21218 USA Biological Sciences Carnegie Mellon University Pittsburgh PA 15213 USA Marymount University School of Arts and Sciences 2807 N. Glebe Road Arlington VA 22302 USA

A fast, green and readily reproducible microwave-based method for the production of high quality silver nanoparticles （AgNPs） in high yield is presented. Starch is used as a stabilizing agent with few pentose different reducing carbohydrates as D-ribose, D-arabinose and L-arabinose. From the UV-vis peak profile spectra of the solutions of the silver nanoparticles, the authors have investigated the size of the NPs together with the average diameter, shape, and aggregation state of the colloidal AgNPs. TEM measurements and EDX analysis have confirmed the morphology of our AgNPs.

关键词： Microwave synthesis UV-vis spectroscopy Mie theory silver nanoparticles TEM and EDX.

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A Retrospective Study of Directed Blood Donations in the Kasungu District of Malawi

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Open Journal of Blood Diseases 2018年第4期8卷 74-82页

作者： David S. Chung Fenjun Shen Sumin Lee Taekwon kong jonathan ko Jin Young Choe Sang Min Lee George Talama School of Medicine University of Virginia Charlottesville VA USA Department of Chemistry and Biochemistry UC Santa Barbara Santa Barbara CA USA Department of Human Biology Michigan State University East Lansing MI USA Department of Chemistry Washington University St. Louis MO USA School of Arts and Sciences NYU Yew York NY USA Seoul International School Seongnam South Korea La Canada High School La Canada CA USA Kasungu District Hospital Kasungu Malawi

Since the discovery of blood circulation and transfusion, there has been an insatiable demand for voluntary blood donations throughout the world. However, gathering blood donors has never been easy because eligible donors constitute only a fraction of the general population and are often reluctant to donate. This is especially challenging in underprivileged countries of sub-Saharan Africa such as Malawi whose nationally run blood transfusion service struggles to maintain hospital blood banks. As a result, hospitals turn to their local communities for directed donations. A retrospective analysis from January 2014 to June 2016 of directed blood donor data from two hospitals in the Kasungu District of Malawi was conducted. The analysis of 2134 donations was carried out with respect to sex, age, hemoglobin concentration, blood group, and presence of transfusion-transmissible infections. On average, donors were 30 years of age and predominately male. Blood group O+ constituted more than half of all directed blood donations. Ultimately, about one third of donations were unable to be utilized for transfusion.

关键词： Blood Type Blood Donor Data Malawi

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Formadinium Cation Doping Stabilized Ultra-deep-blue Lead Halide Perovskite Nanocrystal Light-emitting Diodes

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Chemical Research in Chinese Universities 2024年第3期40卷 556-560页

作者： Pui Kei ko jonathan E.HALPERT Department of Chemistry The Hong Kong University of Science and TechnologyKowloonHong Kong 999077P.R.China

The halide migration effect in mixed-halide lead-based perovskite is a serious problem hindering the development of its display *** this study,we have successfully addressed this issue by reporting formadinium(FA)doped mixed-halide perovskite nanocrystals(NCs)with ultra-deep-blue emission of 450 nm,narrow bandwidth of 16 nm,and a high photoluminescence quantum yield(PLQY)of 66%.The perovskite nanocrystal light-emitting diodes(NC-LEDs)using this nanocrystal as an active layer achieved a maximum external quantum efficiency(EQE)of 0.32%,30-fold improved compared to that of pristine and stable electroluminescence(EL)spectra at 450 nm under a 4.9–8.0 V *** findings demonstrate the potential of our approach in developing stable and efficient deep blue perovskite NC-LEDs.

关键词： Halide perovskite Light-emitting diode Deep-blue

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^(68)Ga-PSMA PET/CT versus CT and bone scan for investigation of PSA failure post radical prostatectomy

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Asian Journal of Urology 2021年第2期8卷 170-175页

作者： Yuigi Yuminaga Chris Rothe jonathan Kam Kieran Beattie Mohan Arianayagam Chuong Bui Bertram Canagasingham Richard Ferguson Mohamed Khadra Raymond ko Ken Le Diep Nguyen Celi Varol Matthew Winter Nepean Urology Research Group Nepean HospitalPenrith New South WalesAustralia Nepean Radiology Research Group Nepean HospitalPenrith New South WalesAustralia

Objective:To evaluate the use of Gallium-68 prostate-specific membrane antigen positron emission tomography/computed tomography(^(68)Ga-PSMA PET/CT),compared with conventional CT abdomen/pelvis(CTAP)and whole body single photon emission CT bone scan(BS),for detection of local or distant metastasis following biochemical failure/recurrence in post-prostatectomy ***:We conducted a review of our prospectively maintained,institutional database to identify 384 patients with post-prostatectomy biochemical failure/recurrence who underwent PSMA PET/CT,CTAP and BS from February 2015 to August 2017 in Nepean Hospital,tertiary referral *** results of the three imaging modalities were analysed for their ability to detect local recurrence and distant *** PET/CT and CTAP imaging were separately performed on the same day and the BS was performed within several days(mostly in 24 h).Difference in detection rates was determined between the modalities and the Chi square test was used to determine ***:A total of 384 patients were identified with a median prostate-specific antigen(PSA)of 0.465 ng/mL(interquartile range =0.19-2.00 ng/mL).Overall,PSMA PET/CT was positive for 245(63.8%)patients whereas CTAP and BS were positive in 174 patients(45.3%).A total of 98 patients(25.5%)had local or distant metastasis detected on PSMA only,while 20 patients(5.2%)had recurrences detected on CTAP but not on PSMA PET/***:The use of PSMA PET/CT has a higher detection rate of predicted local or distant metastasis compared to CTAP and BS in the staging of patients with biochemical recurrences after radical prostatectomy.

关键词： Prostatic neoplasms Positron-emission tomography Prostate-specific antigen Neoplasm staging Bone scan

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