This study is to evaluate the anatomical characteristics of spondylolisthesis patients using spine ultrasound imaging. The optimal angle of spinal needle insertion for spinal anesthesia in spondylolisthesis patients was compared to that of normal patients without abnormal spinal anatomy.
Study Type
OBSERVATIONAL
Enrollment
40
Spondylolisthesis at a single level
Seoul National University Hospital
Seoul, South Korea
The predicted optimal angle of spinal needle insertion for spinal anesthesia at the level of spondylolisthesis. (alpha 1)
The needle insertion angle where the height of ligamentum flavum/dura mater complex(LFD) is measured the longest in ultrasound image.
Time frame: Preanesthesia
The predicted optimal angle of spinal needle insertion for spinal anesthesia at the one upper level of spondylolisthesis. (alpha 2)
The needle insertion angle where the height of LFD is measured the longest in ultrasound image.
Time frame: Preanesthesia
The height of LFD measured by ultrasound image.
The height of LFD at the interlaminar space in midline and paramedian ultrasonography view at the angle of alpha 1 \& alpha 2.
Time frame: Preanesthesia
The depth from skin (needle insertion point) to LFD.
The depth from skin to LFD at the interlaminar space in midline and paramedian ultrasonography view at the angle of alpha 1 \& alpha 2.
Time frame: Preanesthesia
The depth from skin (needle insertion point) to posterior longitudinal ligament(PLL).
The depth from skin to PLL at the interlaminar space in midline and paramedian ultrasonography view at the angle of alpha 1 \& alpha 2.
Time frame: Preanesthesia
Patients' gender, age, height, weight, BMI, etc.
gender, age, height, weight, BMI
Time frame: Preanesthesia
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