Arthropathy of Knee
Conditions
Keywords
spinal anesthesia, ultrasonography, anatomical landmark
Brief summary
The most used anatomical landmark for application of spinal anesthesia is Tuffier's line. Other alternative landmark is tenth rib. However there is no trial that compare these landmarks based on using ultrasonography.
Detailed description
The investigators aim to compare two landmarks (Tuffier's line and tenth rib line) for accuracy by using ultrasonography. 40 patients will be included in each groups. all of them will be assessed by ultrasonography during application of spinal anesthesia. And the investigators will examine the percentage of successful estimation of correct vertebral space.
Interventions
spinal anesthesia guided with ultrasonography
Sponsors
Study design
Eligibility
Inclusion criteria
* knee arthroscopic surgery
Exclusion criteria
* BMI\>30 * anatomical anomaly of vertebrae
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| success of estimation the correct vertebral space | 2 months | Independently, first anesthesist will determine the spinal anesthesia application point (intervertebral space) according to Tuffier's line and second anesthesist will determine it by ultrasonography. And third anesthesist will compare the accuracy of first determination. |