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Bone cancer has a prevalence in young population. Unfortunately, it presents a low level of morbidity but a very high level of mortality. Most common treatments for bone tumors are surgery (amputation), radiotherapy and chemotherapy. These treatments present side effects, which affects patients' life quality. Thermotherapy is a new friendlier alternative to treat this kind of tumors. Specifically,...
This study was made in order to prove the feasibility of two of the most promising thermal therapies to treat bone tumors. Microwave (MW) and ultrasound (US) ablation were analyzed. For MW ablation, a single slot antenna was designed. The best characteristics of the antenna, to generate an electromagnetic field and its absorption by the bone, were obtained by a parametric modeling. Length and location...
This paper presents the characterization of an infrared (IR) Longwave camera kit (Lepton-Flir), based on a bolometer array; for the telemetry measuring of temperature in the human skin. It is important to adapt the device to the measured material since the radiometry depends on the emissivity of the material in question. The characterization took place with the comparison with a thermocouple placed...
This work present a new microwave double slot antenna designed specifically to treat, with thermal ablation, bone tumors. Different levels of input power were analyzed to know its performance. 5 W and 10 W of constant power and a variable input power (8 W – 3 W) were applied for 15 min. A 3D model, solved by the finite element method, was developed to analyze the effectiveness of the antenna. First,...
Three numerical models are presented in this work i. e., a reference model and interpolated models varying geometrical traits, material properties, boundary conditions and mesh size to establish their effects in the resultant electric field during electrochemotherapy. For static conductivity the results show that the use of an interpolation function grid of 1 mm and a normal mesh are suitable for...
This paper presents a model and the validation of microwave radiation into the surrounding breast tissues, these patterns are obtained by applying ablation therapy.
Electroporation consists in an electropermeabilization of the cell membrane as a consequence of its exposure to an external electric field. Electrochemotherapy is an application of electroporation and represents a minimally invasive technique which is pretended to be applied in breast cancer treatment. The distribution of the electric field in tumoral tissue was obtained by simulation using finite...
Electrochemotherapy (ECT) is an application of reversible electroporation currently used in the European clinical practice to enhance absorption of chemotherapeutic drugs successfully used in the treatment of cutaneous and subcutaneous tumors. High response ratings obtained in these tumors encourages further investigation about the application of ECT in deep-seated tumors. As an approach to real anatomical...
Electrochemotherapy is an electroporationbased treatment successfully used in palliation of cutaneous and subcutaneous tumors. Its high response rate encourage further research on electrochemotherapy applied in deep tissues as a minimally invasive procedure for primary tumors. In order to assess electrochemotherapy effectiveness in breast primary tumors in Mexico, it is presented a review of background,...
An improving to control a hand prosthesis prototype is presented on this paper, it is a feedback system to measure and limit currents for five actuators. Three different actuators were used: servomotor, stepper motors & gear motors. The hand performs two different movements: flexo-extension & abduction-adduction; is controlled via embedded systems using Arduino® platform, each finger has a...
Electrochemotherapy (ECT) is an application of reversible electroporation which has been effectively used in subcutaneous tumors with resistivity values between 15 kΩcm and 10 MΩcm. ECT takes advantage of pores induction in order to facilitate the absorption of low concentration of cytotoxic drugs locally injected, and which lead to cellular apoptosis of neoplastic tissue. This work analyzes the application...
To propose a prototype of an artificial hand with 5 degrees of freedom with anthropomorphic characteristics and anthropometric dimensions. It a modular prosthesis that will be attached to different types of prosthesis and connectors. This work is based on the anatomical and biomechanical features and functions of the hand to perform grasping movements performed by the fingers. For this, methodological...
This paper presents the characterization of a High-Power Radiofrequency (RF) system applied to oncology hyperthermia. The characterization is made by measuring the induced increase of temperature of a rectangular waveguide radiating with a flat plate antenna in a solid muscle-like phantom. Temperature measurements are taken at different depths with optic fiber sensors. The measurements are made with...
To simulate the real conditions where the ultrasound will be applied, it is necessary the employment of materials to mimic the ultrasound behavior of tissues; these kind of materials are called phantoms. Therefore, it is important to measure the basic characteristics that must be mimicked; one of them is the ultrasound propagation speed. This characteristic could be employed to estimate the soft tissue...
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