University of Twente Student Theses


Temporary fixation using vacuum for the Total Epicardial Delivery Device (TEDD)

Schasfoort, K.B. (2017) Temporary fixation using vacuum for the Total Epicardial Delivery Device (TEDD).

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Abstract:DEMCON is an engineering bureau in Enschede doing project in the field of but are not limited to high-tech systems, industrial systems and medical systems. The internship at DEMCON is done between 5 September 2016 and 9 December 2016 and mainly focused on the TEDD (Total Epicardial Delivery Device) project, which is done in association with the UMCG. The TEDD is an innovative chirurgical tool to more accurately and efficient place electrodes for a pacemaker on the human heart wall, in a non-invasive way. This means that the chest of the patient will not be opened, but only small incisions will be made for entry of the camera and tool(s). The main functions are navigating to the heart, analysing the heart activity, and placing the electrode. To better analyse the heart, the tool must be docked (temporary fixation) to the heart to do measurements. When the location is a good location, the electrode can be mounted. The docking mechanism is the part that is worked at during this internship. There are multiple ways to achieve docking to the heart, but at the time of the start of the internship, it was already decided to use vacuum to temporary fixate the tool. This is because vacuum can be easily turned on and off and is already available in the operating chambers of hospitals. To achieve a strong fixation, the surface of the vacuum area must be as large as possible, but at the same time, the tip of the tool cannot be too large because volume limitations inside the chest of the patient. Also, the tool must fit through a hole of 10 mm diameter, which is defined by the trocar (gate) used. A design trajectory is run through; setting up the requirements, making concepts, testing concepts and prototypes, to finally come to a strong, but small, suction cup design. This suction cup is designed, manufactured and tested during the internship period. 3D printing and injection moulding techniques are used to make the prototypes and the final design. After designing the suction cup, a tool is developed to validate the suction cup and make it possible to navigate and dock the tool using the suction cup. The final testing is done on a pig’s heart by surgeons from the UMCG, which rated the docking as adequate to utilize in real surgeries. Concluded can be that a useful contribution is made to the project by delivering a useful product.
Item Type:Internship Report (Master)
DEMCON, the Netherlands
Faculty:ET: Engineering Technology
Subject:52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
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