 The study will be using patient with acute cholecystitis scheduled for laparoscopic cholecystectomy surgery and the inclusionexclusion criteria is described in the appropriate sections. Potential subjects will be identified prior to their surgery based on meeting the inclusionexclusion criteria. The subject will be approached in the inpatient unit or pre-operative holding area, a private area where curtains can be drawn to maintain privacy. This is a place where patients are routinely examined and consented prior to surgery.. The subject will be informed that participation or a lack of participation in the study does not influence their treatment in any way. The subject will be informed that if they give consent for participation in the study that they may withdraw consent at any time before performance of the study. This withdrawal of consent may be given to the investigator in oral or written form. 