An interventional study of The TAP block group received ultrasound-guided bilateral TAP block (20 mL of 0.375 % ropivacaine per side) during surgery and postoperative intravenous analgesia pump (formula of butorphanol 2 mg/kg) in Postoperative Pain After Cesarean Section, sponsored by Qing Yuan. Completed at 2 sites in China. Open to female participants aged 20 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-03-17.
Sponsored by Qing Yuan · Not applicable, Interventional, and Prevention
Among 248 studies in Pain, Postoperative with a site in China — 78 open to participants now, 80 under way, 3 of them phase 3. Pain, Postoperative · China.
Among the 248 studies in Pain, Postoperative with a site in China, this one is the 157th largest by enrollment of the 205 interventional ones that give a count, is one of 29 that started in 2025, is one of 103 with no phase, and was the 223rd registered.
5,644 studies on the registry are indexed under Pain, Postoperative; 1,229 are open to participants now.
Browse Pain, Postoperative studies →78 of the 248 studies in Pain, Postoperative with a site in China are open now. Recruiting first, the newest first:
Beijing Chao Yang Hospital · Sites in China
Ages 18–80
First Affiliated Hospital of Chongqing Medical University · Sites in China
Ages 18–90
Huazhong University of Science and Technology · Sites in China
Ages 18–80
Shanghai 6th People's Hospital · Sites in China
Ages 18–60
Tianjin First Central Hospital · Sites in China
Ages 18–80
A study can be open while its sites in China have not opened yet or have stopped. Only those recruiting at a site in China →
Of the 678 Pain, Postoperative studies recruiting now, 241 (36%) set no upper age limit and 328 (48%) stop at 75 or younger; 74 take children under 18; 128 take healthy volunteers.
This study: 20 Years to 40 Years · female · healthy volunteers too.
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248 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 8 · Phase 2 21 · Phase 3 13 · Phase 4 67
First in 2004; this study’s year is marked. 29 started in 2025.
By drug class, each counting the studies that test any of its medicines:
This study's enrollment of 83 is above the median of 75 across 4,825 interventional studies indexed under Pain, Postoperative.
Median enrollment 132 across the 205 interventional studies, 350 across the 43 observational. Of the 121 that completed or were terminated, 6 (5%) have results posted.
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22 of 248 have an industry lead sponsor. The 10 most frequent:
Qing Yuan is the lead sponsor of 5 studies on the registry; 3 are open to participants now.
Qing Yuan has 1 study filed under Pain, Postoperative — fewer than ten, so there is no comparison to draw.
21 of the studies in Pain, Postoperative with a site in China that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT07331441Jun ZhangExternal Oblique Intercostal Plane Block for Postoperative Analgesia After Major Upper Abdominal Surgery | 2026-11-25 |
| NCT07412223Xiangya Hospital of Central South UniversityEffect of Tegileridine on Postoperative Bowel Function Recovery in Abdominal Surgery | 2026-12-01 |
| NCT07653932Tongji HospitalPerioperative Quantitative Sensory Testing and Incision Pain Mapping in Thoracic Surgery | 2026-12-31 |
| NCT07519109CSPC Ouyi Pharmaceutical Co., Ltd.Study Evaluating the Safety, Efficacy and Pharmacokinetics of SYH9089 Injection in Patients Undergoing Abdominal Surgery. | 2026-12-31 |
| NCT06320041The Fourth Affiliated Hospital of Zhejiang University School of MedicineEfficacy and Safety of Oliceridine for Moderate to Severe Acute Pain After Orthopedic Surgery | 2026-12-31 |
Add all 21 to your calendar (.ics) → With an account.
Among the 248 studies in Pain, Postoperative with a site in China, from their registry updates:
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ltrasound-guided transversus abdominis plane (TAP) block is an emerging local anesthesia technique that effectively alleviates postoperative pain by injecting anesthetic drugs around the nerves in the abdominal wall. Compared with traditional analgesic methods, TAP blockade may have better analgesic effects and fewer side effects. However, current research on the application of TAP blockade after cesarean section is still limited. Therefore, this study will systematically evaluate its actual effectiveness in pain management after cesarean section through a prospective randomized controlled trial
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
ASA physical status
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The TAP block group received ultrasound-guided bilateral TAP block (20 mL of 0.375 % ropivacaine per side) during surgery and postoperative intravenous analgesia pump (formula of butorphanol 2 mg/kg + tropisetron 8 mg);
Drug: The TAP block group received ultrasound-guided bilateral TAP block (20 mL of 0.375 % ropivacaine per side) during surgery and postoperative intravenous analgesia pump (formula of butorphanol 2 mg/kg)
received only the same formula intravenous analgesia pump. For both groups, rescue
the control group received only the same formula intravenous analgesia pump
VAS pain scores (0-10 scale, where 0 = no pain and 10 = unbearable severe pain) at rest and during activity ( Time to first rescue analgesia requirement and number of patients and total dosage of flurbiprofen axetil used within 48 hours postoperatively;
VAS pain scores (0-10 scale, where 0 = no pain and 10 = unbearable severe pain) at rest and during activity (coughing or turning) at 2, 6, 12, 24, and 48 hours postoperatively were recorded by anesthesiologists not involved in this study.
Time frame: 5 months
Plan to share: No
No publications or documents are linked to this record.
Ran from Jun 2025 to primary completion in Oct 2025, 4 months.
Of 2,094 non-industry interventional studies with no phase under Pain, Postoperative, half reached primary completion within 11 months of starting (the median), counting those still running; a quarter within 6 and three quarters within 23. This study's 4 months is below that.
Counting every sponsor, half of 2,107 studies reached it within 11 months; a quarter within 6 and three quarters within 23.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Mar 2026. You cannot join it, but the record below documents what was studied.
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Qing Yuan