Development and Validation of a Risk Prediction Model for Postoperative Visceral Pain in Abdominal Surgery Patients

Not yet recruiting

• Conditions: Postoperative Visceral Pain

• Registration Number: NCT07048782
• Lead Sponsor: The Second Affiliated Hospital of Chongqing Medical University

Brief Summary

This study aims to investigate the factors influencing the risk of postoperative visceral pain in patients undergoing abdominal surgery. The goal is to develop and validate a predictive model for assessing the risk of postoperative visceral pain, in order to guide individualized preoperative interventions and pain management strategies.

Detailed Description

Not available

Study Timeline

• Status Verified: 2025-06
• Study First Submitted: 2025-06-15
• Study First Submitted QC: 2025-06-24
• Last Update Submitted: 2025-06-24
• Study Start: 2025-07-01
• Study First Posted: 2025-07-02
• Last Update Posted: 2025-07-02
• Primary Completion: 2025-12-30
• Study Completion: 2026-01-30

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 1135

Inclusion Criteria

• Patients undergoing elective abdominal surgery under general anesthesia (including gynecological procedures and general surgery such as gastrointestinal, hepatobiliary, etc.);
• Aged between 18 and 70 years;
• Classified as American Society of Anesthesiologists (ASA) physical status II-III;
• Expected surgery duration ≥ 2 hours.

Exclusion Criteria

• History of previous abdominal surgery;
• Diagnosed with chronic pain;
• Long-term use of analgesics or other psychotropic medications;
• Preoperative emergency condition;
• Presence of severe comorbidities involving major organ systems;
• Failure to complete postoperative pain follow-up.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Pain intensity after surgery	From end of surgery to 48 hours postoperatively	Pain intensity will be recorded at 6, 12, 24, and 48 hours after surgery. At each time point, the Numerical Rating Scale (NRS) pain score will be assessed both at rest and during coughing. Pain intensity was assessed using number rating scale (0-10, higher score represents worse pain intensity)

Secondary Outcome Measures

Name	Time	Method
Postoperative Length of Hospital Stay	From end of surgery to hospital discharge (up to 30 days)	The total time from the end of surgery to hospital discharge will be recorded for each patient. The duration will be measured in days (d) and used to assess postoperative recovery.
Postoperative Analgesic Use	From end of surgery to hospital discharge (up to 30 days)	Detailed records will be kept of the types of analgesics administered postoperatively, the total dosage of each drug, and the frequency of use per day. This measure will help assess pain management and medication requirements after surgery.

Trial Locations

Locations (1)

Department of Anesthesiology, The Second Affiliated Hospital, Chongqing Medical University; 🇨🇳 Chongqing, Chongqing, China