| NCT Number | NCT07538284 |
| Lead Sponsor | Sixth Affiliated Hospital, Sun Yat-sen University |
| Conditions | Major Abdominal Surgery, Postoperative Delirium (POD), Sleep Disturbances, Intranasal Dexmedetomidine |
| Enrollment | 400 participants |
| Start Date | 2026-05-01 |
| Primary Completion | 2026-12-31 (estimated) |
| Study Completion | 2027-06-30 (estimated) |
| Updated on ClinicalTrials.gov | 2026-04-20 |