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Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: Aged 18 to 75, elective open surgery, postoperative epidural anesthesia and analgesia planned, ASA I-II, BMI<25kg/m2, informed consent signed by patients.
Exclusion criteria
Exclusion criteria: Spinal deformity, coagulopathy, preoperative clinical symptoms or imaging examination suggested distant metastasis of the tumor, history of drug allergy, infection at the puncture site, participation in other clinical studies in the past three months, the investigator thinks that he is not qualified to participate in this study for any reason.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Success rate of catheterization; | — |
Countries
China
Contacts
West China Hospital of Sichuan University