New Microcannulation Technique for Imaging Contrast and Drug Delivery via the Lymphatics

Area of Science:

• Medical Imaging
• Surgical Innovation
• Lymphatic System Research

Background:

• Lymphatic imaging is crucial for lymphedema diagnosis and surgical planning.
• Current lymphatic imaging methods have limitations, including indirect contrast administration and potential venous contamination.
• Surgical manipulation of lymphatics for lymphedema has renewed interest in lymphatic vessel assessment.

Purpose of the Study:

• To evaluate a novel microcannulation technique for direct lymphatic vessel access.
• To assess the feasibility of this technique for contrast media injection and drug delivery in preclinical models.
• To explore potential clinical applications in lymphatic imaging and targeted therapy.

Main Methods:

• Pilot and preclinical studies using animal and human cadaver models.
• Indocyanine green lymphography to map lymphatic vessels in the dorsal hand and breast.
• Insertion of a prototype 0.3 mm microcannula into identified lymphatic vessels under surgical microscope.
• Injection of a mixture of blue dye and radiocontrast media, followed by radiographic confirmation of delivery.

Main Results:

• Successful microcannulation and injection into lymphatic vessels were demonstrated in human cadavers.
• The technique confirmed contrast media delivery without leakage.
• The study established microcannulation as a viable route for lymphatic imaging and drug delivery.

Conclusions:

• Lymphatic microcannulation is an innovative and promising technique for contrast-enhanced imaging.
• This method presents a novel route for targeted delivery of anticancer drugs to lymphogenous metastases.
• The technique holds potential for advancing lymphedema diagnostics and cancer therapy.