Publications by authors named "Heng Tat Leong"

Background & Aims: Recreational ketamine use has emerged as an important health and social issue worldwide. Although ketamine is associated with biliary tract damage, the clinical and radiological profiles of ketamine-related cholangiopathy have not been well described.

Methods: Chinese individuals who had used ketamine recreationally at least twice per month for six months in the previous two years via a territory-wide community network of charitable organizations tackling substance abuse were recruited.

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Objective: The aim of the current study was to perform a multicentered prospective double-blinded randomized controlled trial comparing laparoendoscopic single-site access (LESS) versus conventional three-port laparoscopic appendectomy (TPLA).

Background: The clinical benefits and disadvantages of LESS appendectomy are uncertain.

Methods: Between October 2009 and March 2011, consecutive patients admitted with clinical or radiological evidence of appendicitis were randomly assigned to receive either LESS or TPLA.

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We report a rare drain-related complication leading to small bowel obstruction after laparoscopic colectomy. An 82-year-old man developed small bowel obstruction on the second day after laparoscopic anterior resection. Emergency relaparoscopy found herniation of the small bowel mesentery into the side holes of the silicon intraabdominal drain, which led to a 90-degree acute turn of the small bowel and mechanical obstruction.

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Background And Aims: Fistula-in-ano is a common colorectal complaint. Despite of the advancement in preoperative imaging and surgical techniques, recurrence is not uncommon in this disease entity. We aimed to determine the recurrence pattern and predictors of FIA in Chinese population.

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Background: To determine the safety and effectiveness of nurse-administered propofol sedation using patient-controlled analgesia (PCA) pump in outpatient colonoscopy in a Chinese population.

Methods: From April to June 2005, 50 consecutive ASA class I or II patients aged 18-65 undergoing outpatient colonoscopy in an endoscopy centre of a regional hospital were prospectively recruited in this study. After a loading dose of 40-60 mg intravenous propofol, a mixture containing 14.

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Background: The usefulness of both technetium Tc-99m sestamibi (MIBI) scintigraphy and ultrasonography (USG) scan for the detection of enlarged parathyroid glands secondary to renal hyperparathyroidism is rarely addressed.

Methods: A retrospective study from July 1999 to June 2005 was carried out on patients with secondary and tertiary hyperparathyroidism to determine the role of preoperative localization.

Results: In the 5 years, 73 patients with renal hyperparathyroidism underwent initial bilateral neck exploration with total parathyroidectomy.

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Background And Aim: The role of prophylactic endoscopic sphincterotomy in patients with transient common bile duct obstruction is controversial. The aim of this study was to assess the value of performing prophylactic endoscopic sphincterotomy in patients suffering from acute biliary pancreatitis and absent common bile duct stones on endoscopic retrograde cholangiopancreatography (ERCP).

Methods: Hospital notes of patients admitted to our unit with a diagnosis of acute pancreatitis from January 2000 to January 2005 were reviewed.

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Objective: Laparoscopic cholecystectomy (LC) is the most common minimally invasive surgery in Hong Kong. However, ambulatory LC is not a common practice in Hong Kong. This study aims to identify the causes of long hospital stay after elective LC and to delineate a guideline for ambulatory LC.

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We report the use of operative cholangiography in two-port needlescopic (minilaparoscopic) cholecystectomy. A prospective series of 11 patients underwent two-port needlescopic cholecystectomy with operative cholangiography. In ten cases, operative cholangiography was successfully performed.

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Objective: We conducted a prospective double-blinded placebo-controlled randomized trial to investigate the effect of ketorolac trometamol (KT) administered intravenously as premedication in colonoscopy.

Methods: One hundred and forty patients undergoing colonoscopy were randomized to receive either 60 mg of KT (KT group (KTG), n=70) or placebo (normal saline group (NSG), n=70) intravenously as premedication 30 min prior to procedure. Patient-controlled sedation (PCS) was used as the mode of sedation.

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Idiopathic granulomatous mastitis (IGM) is a rare benign inflammatory disease of the breast that mimics carcinoma of the breast. Its etiology and treatment remain unclear. A retrospective review of nine women with histopathologic diagnosis of IGM was performed.

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