Key result
A novel modular suturing catheter for endovascular aneurysm repair successfully performed continuous sutures in a phantom vessel, withstanding pull-out forces of 17.45 N.
A novel modular suturing catheter prototype for EVAR successfully performed continuous suturing in a phantom model, withstanding 17.45 N of force, demonstrating proof-of-concept for preventing stent graft migration.
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Supports preclinical development of suturing catheters for EVAR; leaves open in vivo efficacy and clinical translation.
Endovascular aneurysm repair (EVAR) is a minimally invasive approach for abdominal aortic aneurysm (AAA) treatment. Compared to open surgery, the benefits of EVAR include faster recovery and shorter time in hospital as well as no general anesthesia (in most cases). Though EVAR has become a preferred way to treat AAA with an increasing number of procedures, there are persisting complications, e.g. stent graft migration. Suturing the stent graft to the aorta increases the displacement force necessary to move the implant. This paper describes the design of a suturing catheter for EVAR. The suturing device consist of two modules which can be inserted through the femoral arteries into the abdominal aorta where both join using an electro-magnetic connector. The positioning module provides an anchor inside the aorta for the suturing module and new sequential positions for each stitch. Our large-scale prototype is validated inside a phantom vessel made of silicone material. We are able to successfully prove the concept of this novel single-sided suturing catheter for EVAR.
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Murai et al. (2018) studied Abdominal aortic aneurysm. Modular suturing catheter was evaluated on Suture strength (pull-out force). A novel modular suturing catheter for endovascular aneurysm repair successfully performed continuous sutures in a phantom vessel, withstanding pull-out forces of 17.45 N.
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