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141 results on '"Dong, Tony"'

23. Airway emergency after dental extraction

Author

Dong Tony Cheng, Thomas Young, Paul Mercedes Kim, and Dimitrios Nikolarakos

Subjects
Surgery
Abstract

Life-threatening airway emergencies and uncontrolled haemorrhage following dental extractions is rarely encountered. Inappropriate handling of dental luxators may lead to unexpected traumatic events resulting from penetrating or blunt trauma to the surrounding soft tissues and vascular damage. Bleeding during or after surgery usually resolves spontaneously or with local haemostatic interventions. Pseudoaneurysms are rare occurrences secondary to blunt or penetrating trauma usually produced by arterial injury leading to extravasation of blood. The rapidly enlarging haematoma with risk of spontaneous pseudoaneurysm rupture is an airway and surgical emergency necessitating urgent intervention. The following case highlights the importance of appreciating the potential complications associated with extractions in the maxilla, significant anatomical relationships and recognizing the clinical signs of a threatened airway.

Published
2023

24. An 8‐year retrospective review of emergency laparotomy outcomes in a Queensland rural hospital.

Author

Cheng, Dong Tony, Miyata, Nariyoshi, and Asomah, Francis

Subjects
*RURAL hospitals, *LENGTH of stay in hospitals, *AUDITING, *HOSPITAL emergency services, *KEY performance indicators (Management), *RESEARCH methodology, *ACQUISITION of data, *QUANTITATIVE research, *BENCHMARKING (Management), *ABDOMINAL surgery, *CLINICAL medicine, *MEDICAL records, *DESCRIPTIVE statistics, *QUALITY assurance
Abstract

Objective: Emergency laparotomy (EL) is a major operation performed in critically unwell patients. The National Emergency Laparotomy Audit (NELA), undertaken in the UK since 2013 has shown progressive improvement in clinical outcomes, specifically reduced mortality, and length of stay (LOS) through the implementation of perioperative key performance indicators (KPIs) (ANZ J Surg. 2021;91:2575, Br J Surg. 2015;102:57, Br J Surg. 2017;104:463, JAMA Surg. 2019;154:e190145). The objective is to generate a rural hospital EL audit (MELA) to evaluate local outcomes and clinical standards of practice with regional, national, and international benchmarks. Methods: A review of medical records between January 2014 and December 2021 of patients who undergo an EL. Data collected include patient demographics, clinical information, compliance to KPIs and the primary outcomes of 30‐day mortality and LOS. Design: This is a descriptive quantitative study. The inclusion and exclusion criteria were similar to those defined in NELA and ANZELA‐QI. Setting and Participants: The general surgeons at the rural hospital provide emergency surgery services for the North‐West Queensland community. Main Outcome Measures: To review local clinical outcomes of 30‐day mortality, LOS, and adherence to perioperative KPIs. Results: Overall, 84 patients met inclusion criteria. The median age (IQR) was 61 (48.8–70.3) years. The 30‐day mortality was 3.6% and mean LOS was 12.8 (±13.4) days which was secondary to the low‐risk patients within the data set. Compliance to KPIs (≥80%) was achieved in five of eight standards assessed. Conclusion: Local outcomes appear to be comparable to national and international benchmarks and a similar rural setting. The audited cohort outperformed the national standard in adherence to perioperative KPIs. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Abiotrophia defectiva bacterial endocarditis complicated by an infective intracranial mycotic aneurysm - The need for aggressive odontogenic source control

Author

Dong Tony Cheng, Paul Mercedes Kim, Thomas Young, and Dimitrios Nikolarakos

Subjects
Otorhinolaryngology, Short Communication, General Dentistry
Abstract

Abiotrophia defectiva or nutritionally variant streptococci (NVS) was first described in 1961 as a rare cause of infectious endocarditis (IE). It is distinct to the Streptococcus genus, pleomorphic, and demonstrates variable Gram-staining characteristics due to poor growth in culture media requiring extended incubation or 16S rRNA sequencing in culture negative situations.(1) NVS has also been implicated in the pathogenesis of culture-negative endocarditis. In comparison with other causes of endocarditis, it has the ability to secrete exopolysaccharide and adheres to fibronectin in the extracellular matrix of endovascular structures.(2) NVS is associated with significant morbidity and mortality, higher rates of multisystem complications ranging from pancreatic abscess, intracranial aneurysms, osteomyelitis, and valvular destruction, despite sensitivity to antibiotics.

Published
2021

39. One-Pot Synthesis of Layered Disodium Zirconium Phosphate: Crystal Structure and Application in the Remediation of Heavy-Metal-Contaminated Wastewater

Author

Yu Cheng, Stephan Jaenicke, Xiao Dong Tony Wang, Gaik-Khuan Chuah, and Stephen Sin-Yin Chui

Subjects
Sorbent, Ion exchange, 010405 organic chemistry, Inorganic chemistry, Sorption, Crystal structure, 010402 general chemistry, Phosphate, 01 natural sciences, 0104 chemical sciences, Inorganic Chemistry, Metal, chemistry.chemical_compound, chemistry, Zirconium phosphate, visual_art, Oxidizing agent, visual_art.visual_art_medium, Physical and Theoretical Chemistry
Abstract

Inorganic ion exchangers offer advantages whenever operation at high temperatures or in oxidizing environments is required. A novel two-dimensional disodium zirconium phosphate, Zr(NaPO4)2·H2O, was reported and investigated as an ion exchanger for heavy metals. The material was synthesized by a novel minimalistic solventless approach, and its solid-state structure was determined from powder X-ray diffraction data. Zr(NaPO4)2·H2O crystallizes in the space group P21/c with cell parameters a = 8.7584(1) A, b = 5.3543(1) A, c = 18.1684(3) A, β = 109.053 (1)°, and Z = 4. Its layered structure is similar to that of α-zirconium phosphate, Zr(HPO4)2·H2O. However, unlike α-zirconium phosphate which is limited in practical applications by its narrow interlayer spacing (d = 7.6 A), the disodium zirconium phosphate has a larger spacing of 8.6 A between planes. The material with inherent structural advantages displays excellent sorption for heavy metals such as Pb2+, Cu2+, Cd2+, and Tl+, maintaining its high selectivity with distribution coefficients, Kd, of 104-105 mL/g even in the presence of a large excess of Na+, K+, Mg2+, and Ca2+, which are commonly present in underground water. In particular, the maximum sorption capacity for the highly toxic Tl+ is a record high, 5.07 mmol/g (1036 mg/g). The fast reaction kinetics indicate that the exchangeable positions in Zr(NaPO4)2·H2O are readily accessible, in contrast to Zr(HPO4)2·H2O. The ease of preparation, benign nature, and advantageous ion-exchange properties make Zr(NaPO4)2·H2O a highly promising sorbent for the treatment of water polluted with heavy metals.

Published
2019

46. Direct Planimetry of Left Ventricular Outflow Tract Area by Simultaneous Biplane Imaging: Challenging the Need for a Circular Assumption of the Left Ventricular Outflow Tract in the Assessment of Aortic Stenosis

Author

Liu, Shiying, primary, Churchill, Jessica, additional, Hua, Lanqi, additional, Zeng, Xin, additional, Rhoades, Valerie, additional, Namasivayam, Mayooran, additional, Baliyan, Vinit, additional, Ghoshhajra, Brian B., additional, Dong, Tony, additional, Dal-Bianco, Jacob P., additional, Passeri, Jonathan J., additional, Levine, Robert A., additional, and Hung, Judy, additional

Published
2020
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