Celia S. Pang

Bio: Celia S. Pang is an academic researcher from University of Hong Kong. The author has contributed to research in topics: Circadian rhythm & Melatonin. The author has an hindex of 1, co-authored 1 publications receiving 13 citations.

Effects of halothane, pentobarbital and ketamine on serum melatonin levels in the early scotophase in New Zealand white rabbits.

Abstract: In mammals, the nocturnal rise in pineal melatonin is regulated by signals from the endogenous clock, the hypothalamic suprachiasmatic nuclei There have been few reports on whether anaesthetics which

Graph-based methods for discovery browsing with semantic predications.

Abstract: We present an extension to literature-based discovery that goes beyond making discoveries to a principled way of navigating through selected aspects of some biomedical domain. The method is a type of “discovery browsing” that guides the user through the research literature on a specified phenomenon. Poorly understood relationships may be explored through novel points of view, and potentially interesting relationships need not be known ahead of time. In a process of “cooperative reciprocity” the user iteratively focuses system output, thus controlling the large number of relationships often generated in literature-based discovery systems. The underlying technology exploits SemRep semantic predications represented as a graph of interconnected nodes (predication arguments) and edges (predicates). The system suggests paths in this graph, which represent chains of relationships. The methodology is illustrated with depressive disorder and focuses on the interaction of inflammation, circadian phenomena, and the neurotransmitter norepinephrine. Insight provided may contribute to enhanced understanding of the pathophysiology, treatment, and prevention of this disorder.

Sevoflurane-emergence agitation: effect of supplementary low-dose oral ketamine premedication in preschool children undergoing dental surgery.

Abstract: Background and objectiveThe use of sevoflurane in paediatric anaesthesia which could enable rapid recovery is complicated by the frequent occurrence of emergence agitation. The aim of this study was to test the efficacy of supplementing midazolam-based oral premedication with low-dose oral ketamine

Sevoflurane-emergence agitation effect of supplementary low-dose oral ketamine premedication in preschool children undergoing dental surgery

Abstract: Background and Objectives: The use of sevoflurane in pediatric anesthesia, which could enable a more rapid emergence and recovery, is complicated by the frequent occurrence of post-anesthesia agitation. This study aims to test the efficacy of adding a low dose of ketamine orally, as a supplement to the midazolam-based oral premedication for reducing sevoflurane-related emergence agitation. Materials and Methods: Ninety-two preschool children, aged between two and six years, with an American Society of Anesthesiologists physical status I or II, scheduled for elective dental filling and extractions under general anesthesia were included. The patients were allocated into two groups: Group M (46 patients) received oral midazolam 0.5 mg/kg, mixed with ibuprofen 10 mg/kg, while group KM (46 patients) received a similar premedication mixture, in addition to ketamine 2 mg/kg. The acceptance of the drug mixture, the onset of action, and the occurrence of vomiting were monitored over the next 30 minutes. Induction of anesthesia was carried out using sevoflurane 8 Vol% in 100% oxygen via face mask. Anesthesia was maintained with sevoflurane 1.5-2 Vol% in an oxygen-nitrous oxide mixture. After extubation, the standard scoring scale was used for assessing the quality of emergence. Agitation parameters were measured using a five-point scale. Agitated children were managed by giving intravenous increments of fentanyl 1 μg/ kg. The time of hospital discharge allowance was recorded. Results: Drug palatability, vomiting, and onset of action of premedication; showed no significant differences between both groups. Time of eye opening after discontinuation of sevoflurane showed no significant differences between both groups. Postoperative agitation score and rescue fentanyl consumption were higher in group M than in group KM on admission to the PACU ( P < 0.01). The time of hospital discharge allowance in group M was longer than in group KM ( P< 0.05). Conclusion: Adding a low dose of oral ketamine to midazolam-based oral premedication in preschool children undergoing dental surgery reduced sevoflurane-related emergence agitation without delaying discharge.

The role of melatonin in development of gestational diabetes mellitus

Abstract: This review summarizes many of the published reports about the production of melatonin and it’s role in regulation of carbohydrate metabolism, interrelationships between melatonin, insulin, glucagon and diurnal signaling the blood-glucose-regulating of the islet. The results of experimental and clinical investigations support that low melatonin levels and absence it’s circadian rhythm play the role in the development of gestational diabetes mellitus in womens with pathology of neuroimmunoendocrinology system and suggest the possibility of prognosis and prophylactic this complication of pregnancy.