Premium
Experimental investigation of a twisted string actuation for usage in active catheter
Author(s) -
Yan Lutao,
Wang Qi,
Li Haiyuan,
Zhang Qinjian
Publication year - 2020
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.2145
Subject(s) - controllability , string (physics) , catheter , actuator , computer science , control theory (sociology) , position (finance) , rotation (mathematics) , bending , controller (irrigation) , simulation , biomedical engineering , artificial intelligence , physics , surgery , materials science , mathematics , control (management) , medicine , composite material , finance , agronomy , economics , biology , quantum mechanics
Background The improvement of the steerability and controllability of catheters is highly required because catheter‐based interventional diagnosis and therapy have become increasingly popular. However, active catheters are often complex and expensive. Methods This study attempts to control catheter tip by a twisted string actuator. Experiments are carried out to analyze the full actuation and bending characteristics of the active catheter. Results It is indicated that the expected bending motion can be achieved by twisting the strings. Hysteresis behavior in backward and forward motion is also discussed. High repetitive positional accuracy and reverse position accuracy can be obtained when the number of rotation is low. When the number of turns is 25, the maximum tip position errors are 4, 1.8 and 1 mm in X , Y and Z directions, respectively. Conclusion It is expected that the presented method will prove useful for the application of twisted string active catheter.