University of Twente Student Theses


Development of a multifunctional nasogastric tube for gastrointestinal interventions

Hendrickx, J.F. (2023) Development of a multifunctional nasogastric tube for gastrointestinal interventions.

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Abstract:Nasogastric tubes (NGTs), essential for gastrointestinal interventions, frequently cause complications, including displacement, discomfort, and obstruction. The availability of NGTs with combined functionalities such as videoscopic feedback and feeding, is limited. This study introduces a multifunctional NGT designed to reduce side effects, improve steerability and simplify gastrointestinal interventions. The tube incorporates magnetic actuation, videoscopic feedback, and functionalities such as rinsing, suction, and feeding. This study focuses on the design, development, simulation, and testing of this innovative NGT, addressing the limitations of existing solutions. A standard NGT is extended with a custom-designed magnetic head, molded from PrFeB/PDMS (45/55% volume fraction), which facilitates a camera, guidewire, and magnetic actuation with an external permanent magnet. Functionality testing confirms successful implementation of videoscopic feedback, feeding, suctioning, guidewire application, and rinsing. Modeling the NGT using a Cosserat rod model reveals that a maximum deflection angle of 42.03 degrees can be achieved with an external magnetic field of 60 mT. To evaluate the tube’s usability, inexperienced participants perform tasks within a phantom experiment assessing the magnetic actuation and videoscopic feedback of the prototype. Survey results show an average SUS of 70 (95% CI; 61.2–78.8), indicating good usability. However, both the modeling and experimental results indicate insufficient deflection angles and magnetization for clinical use. Further testing is required to evaluate combined functionalities, gather experiences of gastrointestinal surgeons, and improve the magnetic actuation mechanism. This research presents a significant innovation in NGT design, with the potential to improve gastrointestinal interventions and overcome existing limitations.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:44 medicine
Programme:Biomedical Engineering MSc (66226)
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