Ultrasound Assessment of the Anatomic Landmarks for Spinal Anesthesia in Patients With Hip Fracture

Study Overview
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Brief Summary
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Investigators assess the anatomic landmarks for spinal anesthesia in patients with hip fracture using ultrasonography.

Detailed Description
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Investigators evaluate the anatomic landmarks using Tuffier's line and the tenth rib line for spinal anesthesia in patients with hip fracture, and then assess the consistency of the landmarks-guided interspinous levels with the actual interspinous level using ultrasonography.

Official Title
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Ultrasound Assessment of the Anatomic Landmarks for Spinal Anesthesia in Patients With Hip Fracture

Conditions
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Hip Fractures

Intervention / Treatment
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* Diagnostic Test: Noninvasive ultrasound assessment


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients scheduled for hip fracture surgery under spinal anesthesia Exclusion Criteria: Anatomic abnormalities or masses in the spine History of spinal surgery of compression fracture

Ages Eligible for Study
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Minimum Age: 65 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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Design Details

Primary Purpose: Diagnostic
Allocation: Randomized
Intervention Model: Crossover Assignment
Interventional Model Description: Crossover
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Group 1<br>In the lateral decubitus position, an investigator evaluate the L4-5 interspinous level using an anatomic landmark (Tuffier's line), and then evaluate the L4-5 interspinous level using another anatomic landmark (Tenth rib line). Another investigator evaluate the actual L4-5 interspinous level by noninvasive ultrasonography. | Diagnostic Test: Noninvasive ultrasound assessment<br>* An investigator evaluate the L4-5 interspinous level using anatomic landmarks in turn, then another independent investigator assess the consistency of the landmarks-guided interspinous level with the actual one by noninvasive ultrasound assessment.<br>|
| Experimental: Group 2<br>In the lateral decubitus position, an investigator evaluate the L4-5 interspinous level using an anatomic landmark (Tenth rib line), and then evaluate the L4-5 interspinous level using another anatomic landmark (Tuffier's line). Another investigator evaluate the actual L4-5 interspinous level by noninvasive ultrasonography. | Diagnostic Test: Noninvasive ultrasound assessment<br>* An investigator evaluate the L4-5 interspinous level using anatomic landmarks in turn, then another independent investigator assess the consistency of the landmarks-guided interspinous level with the actual one by noninvasive ultrasound assessment.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Accuracy of each anatomic landmark (Tuffier's line and tenth rib line). | Actual interspinous levels of the landmark-guided approches (Tuffier's line and tenth rib line) are assessed using ultrasonography. | Baseline | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The estimation ratio related to the intervertebral levels | Actual interspinous levels of the landmark-guided approches (Tuffier's line and tenth rib line) are assessed using ultrasonography. | Baseline |