This is a study evaluating the usage of Ketamine as sedative agent in ERCP. The usage of Ketamine will be compared to the standard sedation in our center, which is Midazolam in combination with Pethidine as analgesia.
Malaysian citizens of who is able to give valid consent
Patient planned for ERCP (either emergency or elective)
Known hypersensitivity towards Ketamine or Midazolam
Patient refusal to participate or unable to give consent
Increased intracranial pressure, acute stroke (<3 months), intracranial haemorrhage (<3 months)
Uncontrolled hypertension (BP>160/100) and tachycardia (Heart rate >120)
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Malaysia