Pain
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: (1) Aged 60-90 years old male and female; (2) I-III levels according to American Society of anesthesiologists (American Socitey of Anesthesiology, ASA) grading standard; (3) All objects with weight of 40-80kg;
Exclusion criteria
Exclusion criteria: (1) patient refuses to participate in this trial; (2) long term opioid drugs users; (3) Allergy to the local anesthetic agents; (4) patients with infection of the puncture site; (5) diabetic patients with peripheral nerve lesions.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Catheter position;The spread of local anesthetics; | — |
Countries
China
Contacts
Tongji Hospital of Shanghai