Abstract:

The objective of this study was to evaluate the efficiency of tumor detection in parenchymal organs and their resection by use of a micromagnetic needle detection system (MNDS). A micromagnetic needle (maximum magnetic flux density = 120 mT) and a micromagnetic needle-setting device were used. An in vitro laboratory study with a gumball within gelatin representing a tumor was conducted to calculate detection rates and to measure the time required for resection by MNDS. An animal study with the cervical lymph nodes of pigs representing tumors was conducted to measure the time required for lymph node resection. The removal rate of the target lymph node was 100% with MNDS. Results show that MNDS may be useful for tumor resection in the presence of air and for the resection of tumors that are difficult to detect by ultrasonography.

Authors:

Takeshi Ohdaira, M.D., F.S.A.G.E.S., Shigeto Ogura, M.D., AHideo Nagai, M.D., Jichi Medical University, Tochigi, Japan

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