Ultrasound Image Study for Ultrasound-assisted Paramedian Spinal Anesthesia

Seoul National University Hospital40 enrolled

Overview

This prospective observational study aimed to obtain ultrasound images for ultrasound-assisted paramedian spinal anesthesia and identify the differences according to sidedness of approach, position and age.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Anesthesia, Spinal Ultrasonography Sidedness Position

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients under 40 or over 60 years of age who require spinal anesthesia for orthopedic surgery, * with ASA physical status classification system I, II, III Exclusion Criteria: * Patients with contraindication to spinal anesthesia (coagulopathy, local infection, allergy to local anesthetic) * Patients with communication difficulties * Patient who can not take a sitting or lateral decubitus position (fracture) * Patients with a history of spinal surgery * Patient with anatomical abnormality of the spine

Locations (1)

Seoul national university hospital

Seoul, South Korea

Outcomes

Primary Outcomes

Ultrasonic visualization grading at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

* Good: Both LFD (ligamentum flavum-dura mater complex) and PLL (posterior longitudinal ligament) are visible * Intermediate: Only one of LFD or PLL is visible * Poor: LFD and PLL are not visible

Time frame: Preanesthesia

Distance between the midline and the expected location of needle insertion

Distance between the midline of the vertebrae and the expected location of needle insertion at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

Time frame: Preanesthesia

Height of LFD through interlaminar space

Height of LFD through interlaminar space visible in ultrasound image at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

Time frame: Preanesthesia

Depth from skin to LFD

The depth from skin to LFD at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

Time frame: Preanesthesia

Depth from skin to PLL

The depth from skin to PLL at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

Time frame: Preanesthesia

Width of the intrathecal space

The distance between the LFD and the PLL at left L3-4, L4-5, L5-S1 interspace and right L3-4, L4-5, L5-S1 interspace in lateral decubitus position and sitting position

Time frame: Preanesthesia

Data from ClinicalTrials.gov

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