Singap Med J
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Surgical clip migration is a well-known phenomenon ever since their first use in surgery. The mechanism of clip migration is poorly understood, and can occur from days to years after laparoscopic cholecystectomy. Migration of the surgical clips may be a complex process involving necrosis, pressure exerted from intra-abdominal movement, formation of stones over the exposed clip within the bile duct, and eventual migration into the common bile duct. We report two cases, a 58-year-old man and a 54-year-old woman, of clip- induced biliary stones resulting from surgical clip migration a few years after laparoscopic cholecystectomy.
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In recent years, there has been a paradigm shift from an inpatient to outpatient preanaesthesia evaluation. This has been driven by rising healthcare costs and the increasing popularity of ambulatory and same-day admission surgery. These outpatient preanaesthesia clinics play an important role in enhancing the cost-effectiveness of the perioperative process. This review describes the structure of modern outpatient preanaesthesia evaluation clinics, and the associated benefits, limitations and controversies.