TY - JOUR
T1 - Flexible impulse transfer using a Newton's Cradle-inspired catheter
T2 - A feasibility study
AU - Sakes, Aimée
AU - Grandia, Leander
AU - Lether, Remie
AU - Steenstra, Lukas
AU - Valentijn, Maurice C.
AU - Breedveld, Paul
AU - Spronck, Jo W.
N1 - Accepted Author Manuscript
PY - 2019
Y1 - 2019
N2 - A major challenge during minimally invasive surgery is transfer of high forces through small, flexible instruments, such as needles and catheters, because of their low buckling resistance. In this study, we determined the feasibility of using a Newton's Cradle-inspired catheter (patented) to transfer high-force impulses. Exerting a high-force impulse on the tissue increases the critical buckling load and can prevent buckling. The system comprised an input plunger onto which the impulse is given, a (flexible) shaft filled with Ø2 mm stainless steel balls, and an output plunger to transfer the impulse to the target tissue. In the proof-of-principle experiment, the effect on efficiency of clearance (0.1, 0.2, and 0.3 mm), length (100, 200, and 300 mm), shaft type (rigid vs. flexible), curve angle (0, 45, 90, 135, and 180°), and curve radius (20, 40, 60, and 100 mm) was determined. The catheter delivered forces of 6 N without buckling. The average impulse efficiency of the system was 35%, which can be further increased by optimizing the design. This technology is promising for high-force delivery in miniature medical devices during minimally invasive surgery.
AB - A major challenge during minimally invasive surgery is transfer of high forces through small, flexible instruments, such as needles and catheters, because of their low buckling resistance. In this study, we determined the feasibility of using a Newton's Cradle-inspired catheter (patented) to transfer high-force impulses. Exerting a high-force impulse on the tissue increases the critical buckling load and can prevent buckling. The system comprised an input plunger onto which the impulse is given, a (flexible) shaft filled with Ø2 mm stainless steel balls, and an output plunger to transfer the impulse to the target tissue. In the proof-of-principle experiment, the effect on efficiency of clearance (0.1, 0.2, and 0.3 mm), length (100, 200, and 300 mm), shaft type (rigid vs. flexible), curve angle (0, 45, 90, 135, and 180°), and curve radius (20, 40, 60, and 100 mm) was determined. The catheter delivered forces of 6 N without buckling. The average impulse efficiency of the system was 35%, which can be further increased by optimizing the design. This technology is promising for high-force delivery in miniature medical devices during minimally invasive surgery.
KW - Buckling
KW - Catheter
KW - Feasibility
KW - Force
KW - Guidewires
KW - Impulse
KW - Medical device design
KW - Minimal invasive surgery
KW - Momentum
KW - Newton's Cradle
UR - http://www.scopus.com/inward/record.url?scp=85064081999&partnerID=8YFLogxK
U2 - 10.1016/j.medengphy.2018.12.025
DO - 10.1016/j.medengphy.2018.12.025
M3 - Article
AN - SCOPUS:85064081999
SN - 1350-4533
VL - 67
SP - 88
EP - 95
JO - Medical Engineering and Physics
JF - Medical Engineering and Physics
ER -