Ultrasound: A novel alternative technique for cervical epidural space visualization-A pilot study

Area of Science:

• Anesthesiology
• Medical Imaging
• Ultrasound Technology

Background:

• Neuraxial ultrasound (US) is an emerging imaging technique for neuraxial procedures.
• It aids in visualizing anatomy and guiding epidural space catheterization.
• Cervical epidural access traditionally relies on blind techniques with associated risks.

Purpose of the Study:

• To evaluate the efficacy of neuraxial ultrasound for cervical epidural access.
• To determine the failure rate and complication incidence associated with US-guided technique.
• To compare US-guided measurements with the conventional loss of resistance (LOR) method.

Main Methods:

• A prospective, single-arm pilot study involving 21 participants.
• Neuraxial US was used for image quality assessment (Ultrasound Visibility Score - UVS) and epidural space depth measurement.
• Real-time US confirmed epidural catheter placement, with complications and failure rates recorded.

Main Results:

• The oblique paramedian sagittal view provided superior UVS compared to the transverse interlaminar view (P < 0.05).
• US-guided depth measurements were comparable to the LOR technique (P = 0.83).
• The average number of puncture attempts was low (1.1 ± 0.3), and post-procedure US confirmed catheter placement effectively.

Conclusions:

• Neuraxial ultrasound is effective for visualizing and guiding cervical epidural catheterization.
• The US-guided technique significantly reduces procedural failure rates and complications.
• This pilot study supports the integration of US into routine neuraxial procedures.