H. K. Cheung

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Studies suggest that executive functions in patients with schizophrenia are markedly impaired as compared with normal controls. Most previous studies employed tests of executive functions adopted from frontal lobe neuropsychological paradigms based on lesion studies. This study employed several more recently developed theory-driven tests of executive(More)
We examined the fractionation of executive functioning performance in ninety patients with schizophrenia, who were tested for initiation, sustained attention, switching/flexibility, attention allocation and impulsivity/disinhibition. The participants were also given tests of general intelligence and memory. We analysed the executive functioning performance(More)
We tested the hypothesis that patients with schizophrenia are more prone to impairment in planning and problem-solving as compared with normal controls and patients with traumatic brain injury (TBI) by administering the Tower of Hanoi (TOH) task. A total of one hundred and fifty-three participants (51 in each group) were recruited. The performance of the(More)
BACKGROUND Donor hepatectomy with maximal safety while preserving graft viability is of principal concern in living donor liver transplantation. There are compelling reasons for avoiding blood transfusion, even with autologous blood, to avoid the potential risks it imposes on healthy donors. This study aims to describe the surgical technique and clinical(More)
GLYCOGEN storage diseases (GSD) are inherited disorders in which the amount and/or structure of glycogen in body tissues are abnormal. GSD I (von Gierke disease) is caused by a deficiency of glucose 6-phosphatase activity in the liver, kidney, and intestinal mucosa with glycogen overloading in these organs. The clinical manifestations are seizures, systemic(More)
BACKGROUND Liver graft size, anatomy of the bile duct and the vascular inflow and outflow are essential for living related liver transplantation (LRLT). Preoperative delineation of those variations that would change the operative procedure to achieve a successful result especially in an emergency condition. PURPOSE Our aim was to develop a rapid and(More)
The sustained attention to response task (SART), a measure of sustained attention created by Robertson, Manly, Andrade, Baddeley, and Yiend (1997), was administered to 51 patients with schizophrenia and 51 normal controls to provide information on the sensitivity of the measure in this clinical group. Patients with schizophrenia performed significantly(More)
One hundred unpremedicated female patients of ASA grade 1 or 2 who underwent laparoscopy as outpatients were allocated randomly to one of four groups. All patients received general anaesthesia with fentanyl, thiopentone, halothane, nitrous oxide and oxygen; suxamethonium was given to facilitate tracheal intubation. In the recovery room, group 1 (control)(More)
ORTHOTOPIC liver transplantation (OLT) is now being performed with improved survival rates in a high number of patients suffering from different liver diseases. Despite better control of blood loss, hemorrhages still occur, particularly after reperfusion. Problems arising from defective hemostasis during major abdominal surgery are a major risk for patients(More)
OBJECTIVE To determine the factors associated with high-dose antipsychotic prescribing for psychiatric patients in Hong Kong. DESIGN Retrospective cross-sectional study. SETTING Psychiatric in-patients and out-patients in the New Territories West Cluster, Hong Kong. PATIENTS A total of 1129 in-patients and 7520 out-patients who received antipsychotic(More)