Complication of anesthesia
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Age >= 60 years; 2. American Society of Anesthesiologists (ASA) Grades ?-?; 3. Elective gastrointestinal surgery with surgical duration >= 2 hours; 4. Sign informed consent.
Exclusion criteria
Exclusion criteria: 1. Severe preoperative hypertension; 2. Patients with severe preoperative arrhythmia or hemodynamic attenuation; 3. Patients with severe sleep disorder or chronic pain before surgery; 4. Preoperative use of antipsychotic drugs, sedative-hypnotics, or narcotic analgesics.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 24-hour ambulatory blood pressure; | — |
Secondary
| Measure | Time frame |
|---|---|
| Postoperative outcomes;melatonin; | — |
Countries
China
Contacts
The Second Hospital of Anhui Medical University