Operations on lower abdominal or lower limbs under spinal anesthesia including general surgeries,obstetric and gynecologic surgeries and orthopedic surgeries.
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: Major eligibility criteria: patients with ASA class I or II aged 18-75 who were scheduled for lower abdominal or lower extremity surgeries under spinal anesthesia Major exclusion criteria: language barrier ; contraindications to neuroaxial block ; morbid obesity (BMI> 40) ; pregnancy ; lumbar surgical scar and obvious lumbar scoliosis.
Exclusion criteria
Exclusion criteria:
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Number of bone contact. Timepoint: Once at the time of block. Method of measurement: Counting the number of bone contact. | — |
Secondary
| Measure | Time frame |
|---|---|
| Ease of space identification/needle insertion. Timepoint: Once at the time of block performance. Method of measurement: Easy or difficult or impossible. | — |
Countries
Iran (Islamic Republic of)
Contacts
Tehran university of medical sciences