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Microwave ablation trocar for ablating cancerous tumors: a numerical analysis

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Abstract

Microwave ablation (MWA) is a newly developing minimally invasive thermal therapies technology. The ablation region obtained during MWA mainly depends on the type and efficiency of the trocar as well as the energy transfer from the generator to the biological tissue. In the present article, a novel trocar for MWA therapies has been proposed. A 3-dimensional tumor-embedded hepatic gland ablated with the novel MWA trocar has been numerically analyzed using finite element method–based software. The novel trocar consists of a flexible dual tine supplied with a microwave power of 15 W at 2.45/6 GHz for an ablation time of 10 min for all the cases. Various combinations of supplied energy and deploying lengths result in tumor ablations ranging from 2.7 to 4 cm in diameter. Supplying energy at high frequency (6 GHz) to the trocar results in ablating tumors (> 4 cm) with spherical ablation region. The novel trocar generated large ablation regions which are 2–3 times bigger than the tumors obtained using existing single-slot non-cooled trocars. This research on novel trocar may help clinicians in treating large size tumors of symmetric and asymmetric shapes by overcoming the problem associated with precise position of trocar into the tissue.

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Acknowledgements

The authors would like to acknowledge the Indian Institute of Technology Ropar for providing essential infrastructure to carry out the present research.

Funding

This work was supported by the Science and Engineering Research Board (SERB), Government of India [grant number CRG/2020/004448].

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  1. Department of Mechanical Engineering, Satish Dhawan Building, Indian Institute of Technology Ropar, Rupnagar, Punjab, India, 140001

    Vellavalapalli Satish & Ramjee Repaka

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  1. Vellavalapalli Satish
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Correspondence to Ramjee Repaka.

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Satish, V., Repaka, R. Microwave ablation trocar for ablating cancerous tumors: a numerical analysis. Med Biol Eng Comput 61, 1113–1131 (2023). https://doi.org/10.1007/s11517-023-02781-7

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