Abstract
This work is about the study of the advanced materials with shape memory alloys (SMAs) for the construction of a medical device for ablation of tumors via radio frequencies, which must be supported by a Cartesian robot of 3 degrees of freedom (RC3GL). The objective focuses on providing equipment to the medical sector to fill the role currently performed manually by the specialist of the state of Chihuahua, Mexico, in patients affected by cancer in organs such as liver, lung, kidney, prostate and breast. In the design of the medical device, it was necessary to control the temperature of transformation between the austenite and matensite phases to which the changes in shape of the SMA is produced in the range of 45℃ to 50℃. To fulfill the objective, two studies were conducted: i. statistical and ii. experimental by the annealing treatment of SMEs in determined temperature, time and rhythm of heating and cooling, measured by resistivity and dynamo-mechanical (DMTA) techniques that match those of other authors. From the results obtained, the nitinol (NiwxTiyz) was selected as the alloy that meets the medical requirements for the successful design of the tumors remover. From the experimental tests for the thermal profile required in the nitinol tip during the ablation process of 8 minutes (modeling and previously simulated which are shown here), made with the medical device adapted to the RC3GL (patent pending), it can be concluded that, the objective of building the medical equipment for removing cancerous tumors in organs is met.
Highlights
This work is about the study of advanced materials called alloys with shape memory (SMAs), used in the design of equipment to remove cancerous tumors in human organs, which was implemented on a Cartesian robot with 3 degrees of freedom (RC3GL) [1] with the aim of supplying the manual function currently performed by the radiation oncologist on cancer patients in the State of Chihuahua, Mexico
Once the appropriate shape memory alloys (SMAs) for ablation of tumors is obtained from the statistical study, the purpose of this work is focused on experimental trials for the behavior of NiwxTiyz alloys, and build the tumors remover with the appropriate material
Two types of tests to determine the behavior of advanced materials with shape memory alloys were performed, in order to find the alloy that meets the medical requirements for the design of a device to remove cancerous tumors in organs such as liver, lung, kidney, prostate and breast
Summary
This work is about the study of advanced materials called alloys with shape memory (SMAs), used in the design of equipment to remove cancerous tumors in human organs, which was implemented on a Cartesian robot with 3 degrees of freedom (RC3GL) [1] with the aim of supplying the manual function currently performed by the radiation oncologist on cancer patients in the State of Chihuahua, Mexico.Two types of studies were performed: a) statistical and b) experimental, in order to determine the ideal material for medical application.Statistical studies [2,3] allowed us to differentiate the nickel-titanium alloys of other alloys, allowing the nitinol position as the best candidate for the design of the remover, which led to experiments on the behavior of alloys of this material to find the exact alloy. This work is about the study of advanced materials called alloys with shape memory (SMAs), used in the design of equipment to remove cancerous tumors in human organs, which was implemented on a Cartesian robot with 3 degrees of freedom (RC3GL) [1] with the aim of supplying the manual function currently performed by the radiation oncologist on cancer patients in the State of Chihuahua, Mexico. Two types of studies were performed: a) statistical and b) experimental, in order to determine the ideal material for medical application. Temperatures of martensite-austenite transformation of SMAs represent the most important characteristic to measure for medical application proposed in this paper
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