Publications by authors named "Chung K Yeung"

Identifying risk factors associated with the carriage of antimicrobial-resistant (AMR) bacteria in dogs is crucial to understanding their epidemiology and for developing and refining targeted control measures. However, relevant data is scattered and conflicting findings have been reported. This systematic review aimed to compile risk factors associated with the carriage of AMR- in dogs worldwide and to identify relevant knowledge gaps for directing future research.

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Background And Aims: Computer-assisted detection (CADe) is a promising technologic advance that enhances adenoma detection during colonoscopy. However, the role of CADe in reducing missed colonic lesions is uncertain. The aim of this study was to determine the miss rates of proximal colonic lesions by CADe and conventional colonoscopy.

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Article Synopsis
  • A study found that sometimes doctors can miss up to 26% of growths called adenomas during a procedure called colonoscopy, where they check the colon for problems.
  • Researchers tested a special AI technology that helps doctors find these missed growths by reviewing videos of colon exams, and it could spot around 79% of the missed adenomas in one test.
  • The AI was used in real procedures, finding missed adenomas in about 27% of patients, suggesting that using AI could help doctors be more careful and catch more of these growths.
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Due to the neurotoxicity effects of general anesthesia (GA) and sedatives found in animal studies, there is a general recommendation to avoid nonurgent surgical procedures requiring anesthesia in children younger than 3 years of age. The aim of this study was to determine the incidence of anesthesia-related postoperative cognitive dysfunction (POCD) on the first day (Day 1) and at 6 weeks after elective noncardiac surgery in school-age children.This was a prospective cohort study of 118 children undergoing GA and 126 age-matched controls of school children aged 5 to 12 years.

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Purpose: Our previous results revealed a positive correlation between bladder dysfunction and cortical arousals in children with enuresis. This finding implied an interrelationship between bladder dysfunction and brainstem dysfunction. Thus, we used an animal model to characterize brainstem functional changes in response to altered bladder function.

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Purpose: Patients with nocturnal enuresis may have small functional bladder capacity or altered bladder fullness sensation. We determined whether reducing bladder volume would affect the central inhibition of voiding that is normally present between birth and 2 weeks of life in neonatal rats.

Materials And Methods: One and 3-week-old Sprague-Dawley rats underwent 50% bladder volume reduction by suture closure of the bladder dome.

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Objective: Systematic reports on acute upper gastrointestinal bleeding in children/adolescents are scanty. The aim of this study is to analyze its presentation, pathology and outcome in Hong Kong.

Methods: A retrospective review of the hospital database for admissions up to the age of 18 years with signs of acute upper gastrointestinal bleeding between 1 June 1996 and 31 May 2006.

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Background: Data of Helicobacter pylori prevalence in children and its risk factors provide clues to the health authority to estimate burden of H. pylori-associated diseases usually encountered in adulthood and facilitate healthcare planning.

Materials And Methods: A cross-sectional population-based study was conducted in Chinese children in elementary and high schools.

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Background: Sacrococcygeal teratoma (SCT) is one of the most common tumors encountered in the neonatal period. Traditionally, a large abdominal incision is required for the combined abdominal perineal approach for the complete resection of type II-IV tumors. In this paper, we report our experience of using the combined laparoscopic perineal approach in treating these tumors.

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Background/purpose: This study aimed to illustrate the first report of extrarenal Wilms tumor occurring in a family.

Materials And Methods: Retrospective case note review of 3 siblings, 2 of which presented with extrarenal Wilms tumor. Immunohistochemical analysis for WT1 gene product was performed together with molecular genetic linkage studies.

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Background: Intussusception is one of the most common causes of intestinal obstruction in infancy. Non-operative reduction using air enema or other hydrostatic reduction methods has been the standard treatment in most cases. However, if the non-operative method is not indicated or fails, open surgery is still necessary.

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Purpose: Recently, gas amniodistension has been advocated for fetoscopic surgery to employ ergonomics similar to laparoscopy. However, neither the optimal type of gas nor its physiological influence on the fetus have been clearly outlined yet. This study investigates the impact of helium (HE) vs nitrous oxide (N2O) on fetal goats during fetoscopy.

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Despite the advances in minimally invasive surgery in children, considerable concern exists about employing such techniques in oncologic cases. We report our experience with a 4-year-old girl with a symptomatic tumor in the liver. Contrast-enhanced computed tomography revealed a 3 x 4 cm lesion, confined to segments II and III.

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Objective: To evaluate any differences in the characteristics of primary nocturnal enuresis (PNE) between younger enuretic children and adolescents.

Subjects And Methods: In all, 21 000 questionnaires designed to determine the presence or absence of bed-wetting, diurnal incontinence, frequency of wetting, systemic illness, and family history, were sent to children aged 5-19 years from 67 kindergartens, primary schools and secondary schools randomly selected by a computer from different areas in Hong Kong. In addition, questions were asked to evaluate when and how the parents became aware that bed-wetting is a significant medical problem deserving attention in children after the age of 5 years.

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We have already suggested that there is an active bimodal sphincteric mechanism in the human vesicoureteral junction (VUJ). This mechanism is affected by immaturity, hormonal effects and surgical ablation. This study set out to investigate the effects of anaesthesia on this mechanism.

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Severe acute respiratory syndrome (SARS) is a newly discovered infectious disease caused by a novel coronavirus. During the community outbreak in Hong Kong, 5 liveborn infants were born to pregnant women with SARS. A systematic search for perinatal transmission of the SARS-associated coronavirus, including serial reverse transcriptase-polymerase chain reaction assays, viral cultures, and paired serologic titers, failed to detect the virus in any of the infants.

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To assess the feasibility of a new variant of laparoscopic Cohen cross-trigonal ureter reimplantation in vesico-ureteral reflux (VUR) using telesurgical equipment. VUR was induced in 8 female pigs by transurethral unroofing of the ureteric orifices. Three months later the reflux was verified by a cystography.

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The Doppler waveform of the ureteric jet is the result of modification of ureteric peristalsis by an active sphincteric mechanism of the vesicoureteric junction (VUJ). The monophasic pattern is associated with immaturity. This study set out to see the correlation between this immature pattern with urinary tract infection (UTI) and vesicoureteric reflux (VUR) in children.

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The nature of the action of the vesicoureteric junction (VUJ) in humans is still controversial. We were interested in the reasons why the jet consists of several peaks. We hypothesised that the modification of the jet into a variable number of peaks is the result of an active sphincter mechanism at the VUJ.

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Unlabelled: We compared the systemic absorption of ropivacaine and bupivacaine after caudal epidural administration in children. Twenty ASA physical status I or II children aged 1-7 yr undergoing elective hypospadias repair were randomized after the induction of general anesthesia to receive a single caudal epidural injection of 2 mg/kg of either ropivacaine 0.2% (R) or bupivacaine 0.

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