Global demographic aging poses a major challenge to healthcare systems, intensified by the significant increase in medical needs specific to the elderly population. To address these increasing demands and minimize risks associated with medical vascular interventions, such as aortic valve stenosis pathology, prioritizing less invasive approaches has become imperative. In this context, Transcatheter Aortic Valve Implantation (TAVI) has emerged as a significant advancement, offering a less invasive alternative to traditional cardiac surgery. To optimize the precision and efficiency of this procedure, the use of a growing robot stands out as an innovative approach. Its ability to deploy from the inside ensures flexibility tailored to the unique morphology of each patient, thus reducing the risks of tissue perforation. Inspired by the work of Li et al., a cadaveric clinical test was undertaken, implementing an 8 mm diameter growing robot made from silicone-coated Ripstop Nylon and pressurized with an iodine solution. The results of these trials revealed difficulties in navigating through narrow anatomical areas such as stenosis. Consequently, a study on the compliance of growing robots was undertaken, exploring the use of various materials with different properties.