Newly Developed Electromagnetic Tracked Flexible Neuroendoscope  -Technical Note-

Atsumi, N; Matsumae, Mitsunori; Hirayama, Akihiro; Sato, Kenichiro; Shigematsu, Hideaki; Inoue, Goro; Nishiyama, Jun; Yoshiyama, Michitsura; Tominaga, Jiro

doi:10.2176/nmc.51.611

Cited by 11 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our novel ureteroscopic navigation system used magnetic tracking. Development of a similar navigation system using magnetic tracking has recently been described for flexible neuroendoscopy, 8 but use of such a system in clinical endoscopic procedures has not yet been reported. Ureteroscopic procedures are complex, and considerable experience is necessary to acquire the fundamental skills needed.…”

Section: Discussionmentioning

confidence: 99%

Novel Ureteroscopic Navigation System with a Magnetic Tracking Device: A Preliminary Ex Vivo Evaluation

Yoshida

Kawa²,

Taniguchi³

et al. 2014

Journal of Endourology

View full text Add to dashboard Cite

Purpose: Examination of the pyelocaliceal system using a flexible ureteroscope necessitates accurate orientation of the tip of the instrument. This study assessed the use of a novel real-time ureteroscopic navigation system in a pyelocaliceal phantom. Materials and Methods: The navigation system used a magnetic tracking device to determine the position of the ureteroscope in a pyelocaliceal phantom and displayed the position of the endoscope on a threedimensional image that could be rotated. Twenty-eight urologists were divided into group A and group B (seven novice surgeons and seven experienced surgeons in each group). All participants were asked to examine the phantom and identify the positions of three designated calices, without the navigation system (Task 1) and with the navigation system (Task 2). In group A, participants performed Task 1 followed by Task 2. In group B, participants performed Task 2 followed by Task 1. The accuracy rate (AR) of identifying the calices, migration length (ML) of the tip of the ureteroscope, and time (T) taken to complete the task were recorded. The results were compared between Task 1 and Task 2, and between novice and experienced surgeons. Results: The AR for Task 2 was 100% in both group A and group B. The AR was significantly lower in Task 1 than in Task 2 for both novice and experienced surgeons in both groups (group A: novice P = 0.016, experienced P = 0.034; group B: novice P = 0.015, experienced P = 0.015; Wilcoxon test). In Group A, T was significantly longer in Task 1 than in Task 2 for experienced surgeons. There were no significant differences in ML or T between novice and experienced surgeons. Conclusions: Our novel ureteroscopic navigation system improved the accuracy of ureteroscopic maneuvers. Further development of this system for use in clinical ureteroscopic procedures is planned.

show abstract

Section: Discussionmentioning

confidence: 99%

Novel Ureteroscopic Navigation System with a Magnetic Tracking Device: A Preliminary Ex Vivo Evaluation

Yoshida

Kawa²,

Taniguchi³

et al. 2014

Journal of Endourology

View full text Add to dashboard Cite

show abstract

“…Visual navigation systems using digitally stored endoscopic images (68), computer-assisted navigational systems (45), ultrasound-based navigation systems (65,74), stereotactic frames (24,36,69,74,81), image guidance with computed tomography and magnetic resonance imaging (52,78), and virtual reality (55) are examples of such innovations in the field of neuroendoscopy. With the combination of image-guided surgery and neuronavigation technology (45,52,53,68,74,79,83), neuroendoscopy has the potential to overcome the limitations of stereoscopic view and the ability to track the tip of the endoscope to decrease the level of invasiveness during a procedure. Surgeons are able to plan their approach and visualize their manipulation of the endoscopic instruments through virtual reality or from the real-time images on the computer screen.…”

Section: Neuronavigation and Image-guided Neuroendoscopymentioning

confidence: 99%

“…The investigators described the successful use of such a tool in patients with pituitary tumors and temporal cavernous malformations (52). A new navigation system prototype was developed by Tsumi et al (83) in 2011 for tracking the tip of a flexible rather than rigid endoscope during surgery. Instead of an optic tracking system that required a direct line of sight, they attached a magnetic field sensor to the tip of a flexible endoscope that is connected to a computer for visualization of the pulsed magnetic field (83).…”

Section: Neuronavigation and Image-guided Neuroendoscopymentioning

confidence: 99%

A Journey into the Technical Evolution of Neuroendoscopy

et al. 2014

View full text Add to dashboard Cite

“…In robotic control, opportunities for closing the control loop are via adding feedback from position and orientation sensors on the endoscope or instrument. Concepts using magnetic tracking also show promising results in accurate and precise positional feedback [98]. Sensors could be added in a sleeve-like design, to ensure the endoscope's current benefits of cleanability and compatibility with available accessories is maintained.…”

Section: Challenges Of Conventional Endoscopesmentioning

confidence: 99%

Robotic steering of flexible endoscopes

Rozeboom¹

View full text Add to dashboard Cite

SummaryFlexible endoscopes were originally designed for non-invasive inspection of body cavities and hollow organs. Today, they are also used for complex minimal invasive interventions. Control of the endoscope is difficult and complexity rises with interventional procedures. Endoscopists suffer from long learning curves, ergonomic complaints and multi-person control is needed to steer endoscope and instrument(s).Robotics have the potential to overcome these problems. The combined forces of a technical university, mechatronic company and physicians from multiple hospitals led to the design of an add-on robotic platform. The platform aims to improve usability of conventional flexible endoscopes for complex interventions. These interventions require accurate and precise tip steering.This thesis describes the design and clinical evaluation of the platform's tip steering module. An optimal user interface and control algorithm was sought to improve usability of the endoscope in clinical practise.First, critical user aspects of conventional gastro-and colonoscopes were identified and copied to the robotic platform. The control module includes a remote interface that was evaluated by novices in a simulated colonoscopy environment. This study indicated that robotic steering, using a position-controlled touchpad or a ratecontrolled joystick increases efficiency and satisfaction. However, breaking the mechanical linkage between operator and endoscope tip led to a lack of force feedback on tip bending.The first results did not show a clear preference between two regular user interfaces and their control algorithms. A position-controlled touchpad has benefits for precise targeting (instrument placement), whereas a rate-controlled joystick is better suited for quick tip steering (lumen navigation). Endoscopy requires both quick and precise tip motions. The second study describes the design of a non-linear rate iii control algorithm. This study showed that between regular intuitive interfaces, the joystick with non-linear rate control showed highest efficiency and users' preference.A single-handed controller was introduced to further reduce the experienced workload of flexible endoscopy. The controller was compared to a bimanual interface and conventional control in a simulated colonoscopy procedure. Both the single-handed and a bimanual controller reduced the workload of colonoscopy without reducing efficiency or effectiveness. Despite the single-handed approach, novices appeared to steer the endoscope tip and shaft consecutively, not simultaneously. Making bimanual control the logical route to pursue.The first three studies indicated that the platform changed the current routine of handling an endoscope. A fourth study was designed to determine if expert endoscopists and endoscopists in training were able to perform the complex manoeuvres required in colonoscopy. Experts and PhD students without previous hands-on experience trained on a computer simulator to perform colonoscope intubation. Experts needed a relatively short ...

show abstract

Newly Developed Electromagnetic Tracked Flexible Neuroendoscope -Technical Note-

Cited by 11 publications

References 22 publications

Novel Ureteroscopic Navigation System with a Magnetic Tracking Device: A Preliminary Ex Vivo Evaluation

Novel Ureteroscopic Navigation System with a Magnetic Tracking Device: A Preliminary Ex Vivo Evaluation

A Journey into the Technical Evolution of Neuroendoscopy

Robotic steering of flexible endoscopes

Contact Info

Product

Resources

About