Association of Preoperative Pain With Moderate to Severe Acute Pain After Laparoscopic Cholecystectomy.

Pain, Postoperative

postoperative pain, dynamic moderate to severe pain, laprascopic cholecystectomy

Despite advancement in perioperative pain management, more than half of the patients still report moderate-severe pain after surgery. Among several risk factors, pre-existing pain has consistently been shown to predict postoperative severe pain.If one can predict the patients who will experience more post-operative pain, then a more aggressive pain management strategy can be adopted perioperatively. This would improve patient satisfaction and prevent poor outcomes such as chronic pain after surgery. Therefore, our primary aim is to find out whether presence of pre-existing preoperative pain would predict moderate-severe acute pain after laparoscopic cholecystectomy. Moreover, we plan to use Patient Reported Outcomes Measurement Information System (PROMIS) scale to assess preoperative pain intensity and pain-related behaviors. Primary &Secondary Objectives: Primary objectives To investigate the association between preexisting preoperative pain (more than 3 months duration) and postoperative moderate-severe acute pain after laparoscopic cholecystectomy. Secondary objectives .1. To investigate the association between preoperative PROMIS(patient reported outcome measurement and information system) domain (PROMIS pain intensity score, PROMIS pain interference score, PROMIS pain behavioural score) and postoperative moderate-severe acute pain after LC. 2\. To examine baseline demographic, clinical, psycho-behavioural features and intraoperative factors in relation to dynamic moderate to severe pain after LC. 3\. To identify perioperative predictors for acute postsurgical pain. 4. To find out the incidence of shoulder tip pain after LC.

Patients who are 18 years of age or more, of ASA 1, 2 and 3, and scheduled for elective laparoscopic cholecystectomy under general anaesthesia will be enrolled in this prospective observational study. Perioperative anaesthesia management will be standardized for all patients. Variables such as age, sex, preexisting preoperative pain (chronic or subacute), preoperative PROMIS pain intensity, PROMIS behavior, PROMIS interference, PROMIS depression, PROMIS sleep disturbance, APAIS score, catastrophizing pain score, neuroticism (EPQRS score), preoperative pain sensitivity, an expectation of the postoperative pain and intraoperative surgical variables will be recorded.

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