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Related Experiment Video

Updated: Jul 7, 2025

Author Spotlight: Enhancing Success of Ultrasound-Guided Neuraxial Anesthesia in Cases with Difficult Anatomy
03:14

Author Spotlight: Enhancing Success of Ultrasound-Guided Neuraxial Anesthesia in Cases with Difficult Anatomy

Published on: January 31, 2025

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Comparison of Two Different Positions for Ultrasound-Guided Intervertebral Distance Evaluation.

Feyza Aksu1, Ferda Kartufan2, Özge Köner1

  • 1Yeditepe University Faculty of Medicine, Department of Anaesthesiology and Intensive Care, İstanbul, Turkey.

Turkish Journal of Anaesthesiology and Reanimation
|December 27, 2023
PubMed
Summary

The sitting fetal lotus position offers a larger interspinous distance compared to the lateral fetal decubitus position during neuraxial anesthesia. Patient comfort was similar between the two positions.

Keywords:
Anatomylumbar intervertebral distanceneuraxial anaesthesiapatient positionultrasonography

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Area of Science:

  • Anesthesiology
  • Medical Imaging
  • Anatomy

Background:

  • Patient positioning is critical for successful neuraxial anesthesia and comfort.
  • The lateral fetal decubitus (LFD) and sitting fetal lotus (SFL) positions are commonly used.
  • Optimizing positioning can enhance block efficacy and patient experience.

Purpose of the Study:

  • To compare the interspinous distance and paravertebral muscle dimensions between the SFL and LFD positions using ultrasonography.
  • To evaluate patient comfort in both the SFL and LFD positions during neuraxial anesthesia.

Main Methods:

  • A prospective study involving 50 adult participants without lumbar anomalies.
  • Ultrasonography was used to measure interspinous distance (L4-L5) and paravertebral muscle transverse diameters.
  • Patient comfort was assessed using a verbal numeric satisfaction scale.

Main Results:

  • The interspinous distance was significantly greater in the SFL position than in the LFD position (P < 0.05).
  • Paravertebral muscle diameters were significantly broader in the SFL position compared to the LFD position (Left: P < 0.001, Right: P < 0.001).
  • No significant difference in patient comfort was observed between the SFL and LFD positions (P > 0.05).

Conclusions:

  • The SFL position provides a larger interspinous distance compared to the LFD position.
  • While patient comfort was comparable, the SFL position may offer anatomical advantages for neuraxial procedures.
  • Ultrasonography is a valuable tool for assessing anatomical variations related to patient positioning in anesthesia.