Toward dynamic lumbar puncture guidance using needle-based single-element ultrasound imaging

Area of Science:

• Medical Devices
• Biomedical Engineering
• Diagnostic Imaging

Background:

• Lumbar punctures (LPs) are crucial for cerebrospinal fluid collection but have limited success rates due to small target windows.
• Obesity increases LP difficulty by widening the bone-to-skin distance, posing challenges for clinicians.

Purpose of the Study:

• To develop a novel needle insertion platform for real-time guidance during lumbar punctures.
• To enhance the accuracy and success rate of LPs, particularly in challenging patient populations.

Main Methods:

• A needle-shaped ultrasound transducer with a single element at the tip was designed for distance sensing and structure localization.
• The system integrates transducer location tracking and synthetic aperture focusing for image formation.
• A prototype was built into a 14 G needle and tested on phantoms mimicking bone structures.

Main Results:

• Simulations demonstrated robust image reconstruction despite potential tip localization errors.
• Experimental evaluation using phantoms successfully reconstructed images of bone-like structures.
• Synthetic aperture reconstruction significantly improved image quality.

Conclusions:

• The developed ultrasound needle guidance system shows potential for real-time intraprocedural navigation.
• This technology could significantly improve the safety and efficacy of lumbar punctures.
• Further development may lead to wider adoption in clinical settings for interventional procedures.