Health TrialsbyHealthPanel

Consistency of ASIS Line vs. Tuffier's Line for Lumbar Level Identification

ConditionsSpinal Anesthesia EvaluationLumbar Vertebrae
Trial statusNot yet recruiting
Trial phaseNot listed
Trial typeObservational
Biological sexAll
Age18-85
SponsorKangbuk Samsung Hospital

About this trial

Tuffier's line is commonly used as a landmark for estimating lumbar vertebral levels during spinal anesthesia. However, its accuracy can vary depending on factors such as age, sex, BMI, and posture. This study evaluates the consistency of an alternative landmark, the "ASIS line" (a line connecting both Anterior Superior Iliac Spines), for identifying lumbar levels in the lateral decubitus position. Researchers will mark both the ASIS line and Tuffier's line on participants and use ultrasound to verify the exact vertebral level where each line crosses the spine. The goal is to determine if the ASIS line provides a more consistent and reliable estimation of lumbar levels compared to Tuffier's line.

Eligibility criteria

This trial does not accept healthy volunteers

Qualifiers

Adults aged 18 to 85 years

Patients scheduled for spinal anesthesia or lumbar ultrasound

Participants who voluntarily agreed to participate and provided written informed consent

Disqualifiers

History of spinal surgery or spinal deformity

Infection or wounds at the puncture site

Inability to maintain the lateral decubitus position

Congenital lumbosacral transitional vertebrae (e.g., sacralized L5 or lumbarized S1)

Trial population

Patients visiting the study centers (Kangbuk Samsung Hospital or St. Vincent's Hospital) who are scheduled for spinal anesthesia or lumbar ultrasound.

Trial design

Design model

Cohort

Time perspective

Prospective

Treatments tested in this trial

  • Lumbar Ultrasound & Palpation

    Diagnostic test

    Identification of vertebral levels using Tuffier's line (palpation) and ASIS line, followed by ultrasound verification.

Treatment groups

140 Participants
are divided into 1 treatment group
Group A: Study Cohort1 intervention

Trial outcomes

Primary outcomes

1

Consistency of Vertebral Level Identification (Standard Deviation)

The specific vertebral level where the ASIS line and Tuffier's line intersect the spine will be identified using ultrasound. The lumbar spine (from L2 upper to S1 upper) is divided into segments (e.g., L2=2, L3=3, L4=4, L5=5, S1=6). The consistency of each method is evaluated by calculating and comparing the standard deviation (SD) of the identified vertebral levels.

Time frame
Day 1 (Immediately during the ultrasound examination)

Secondary outcomes

1

Difference in Mean Intersection Level

Comparison of the mean vertebral levels identified by the ASIS line versus Tuffier's line to determine if there is a significant difference in the average level indicated.

Time frame
Day 1
2

Rate of Identification within L4-L5 Interspace

The percentage of cases where the identified line falls within the target L4-L5 interspace (or within ±1 interspace range).

Time frame
Day 1

Other outcomes

Sponsors and contacts

Click on the lead sponsor to view all of their trials.

Kangbuk Samsung Hospital

Lead sponsor

Source ClinicalTrials.gov

This trial is not recruiting at the moment. You can still explore other options: