Spine Ultrasound Image Study of Spondylolisthesis Patient

Study Overview
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Brief Summary
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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.

Official Title
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Ultrasound Image Study to Evaluate the Optimal Angulation of Needle Insertion for Spinal Anesthesia in Patients With Spondylolisthesis

Conditions
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Spondylolisthesis

Intervention / Treatment
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* Other: Spondylolisthesis


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patients scheduled for elective orthopedic surgery. with ASA physical status classification system I, II, III. Exclusion Criteria: Patients with communication difficulties. Patient who can not take a lateral decubitus position for spinal anesthesia. (e.g) fracture) Patients with a medical history of spinal surgery. Patients with significant spinal anatomical deformity any other than spondylolisthesis. (for spondylolisthesis patients group)

Ages Eligible for Study
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Minimum Age: 20 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| normal lumbar spine<br>Patient without spondylolisthesis or significant spinal anatomic deformity. (ex> severe spondylosis, spinal stenosis, scoliosis, etc..) | |
| spondylolisthesis<br>Spondylolisthesis patients, with whom the deformity is at just one level. The patients should not have any other significant spinal deformity. (ex> severe spondylosis, spinal stenosis, scoliosis, etc..) | Other: Spondylolisthesis<br>* Spondylolisthesis at a single level<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 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. | Preanesthesia | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| 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. | 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. | 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. | Preanesthesia | 
| Patients' gender, age, height, weight, BMI, etc. | gender, age, height, weight, BMI | Preanesthesia | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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optimal angle