subarachnoid block
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: Eighty consecutive elderly patients, aged =75 years, with ASA classification I to III, who were to undergo lower extremity, lower abdominal, or perineal surgery under subarachnoid block
Exclusion criteria
Exclusion criteria: Patients with contraindications to intralesional anesthesia; history of lumbar trauma or lumbar spine surgery; patients with scoliosis; allergy to ultrasound couplers; BMI >35 kg/m2; refusal to participate in the study, etc.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| first-time puncture success rate; | — |
Secondary
| Measure | Time frame |
|---|---|
| Positioning time;Puncture time;Number of puncture points;Puncture frequency; | — |
Countries
China
Contacts
The Second People's Hospital of Wuhu City