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Related Experiment Video

Updated: Nov 1, 2025

Sentinel Lymph Node Mapping and Biopsy for Endometrial Cancer at Early Stage with Laparoscopy
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Laparoscopic Probe for Sentinel Lymph Node Harvesting Using Magnetic Nanoparticles.

Melissa M van de Loosdrecht, Lennert Molenaar, Erik J G Krooshoop

    IEEE Transactions on Bio-Medical Engineering
    |June 25, 2021
    PubMed
    Summary

    This study introduces a new laparoscopic technique for sentinel lymph node harvesting using magnetic nanoparticles. The developed magnetic nanoparticle detection method shows promise for improving cancer patient prognosis and treatment strategies.

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    Area of Science:

    • Minimally Invasive Surgery
    • Nanotechnology in Medicine
    • Surgical Oncology

    Background:

    • Sentinel lymph node harvesting is crucial for cancer staging and treatment planning.
    • Existing techniques for sentinel lymph node identification have limitations.
    • Novel methods are needed to improve the accuracy and efficiency of lymph node harvesting.

    Purpose of the Study:

    • To report a new laparoscopic technique for sentinel lymph node harvesting.
    • To evaluate a prototype laparoscopic differential magnetometer utilizing magnetic nanoparticles.
    • To assess the clinical relevance and potential for technological development of this novel approach.

    Main Methods:

    • Development of a laparoscopic differential magnetometer prototype based on nonlinear detection principles.

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  • Utilizing magnetic nanoparticles with a superparamagnetic iron-oxide core and dextran coating for lymph node identification.
  • Analysis of the prototype's sensitivity to iron content, depth, spatial detection, and angular variations.

    • Main Results:

    • The minimum detectable iron amount was 9.8 μg at 1 mm distance.
    • Detection depth ranged from 5 to 10 mm, and lateral detection distance ranged from 5 to 8 mm, depending on iron concentration.
    • The system demonstrated detectability at all assessed angles (0°–90°) for a sample containing 504 μg iron.

    Conclusions:

    • The laparoscopic differential magnetometer shows significant potential for sentinel lymph node harvesting.
    • This technology offers a promising avenue for further development and clinical implementation.
    • The method facilitates accurate lymph node identification, aiding in cancer prognosis and treatment.