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A novel design for steerable instruments based on laser-cut nitinol

Frank Dewaele (UGent) , Alain F Kalmar, Frederic De Ryck (UGent) , Nicolaas Lumen (UGent) , Leonie Williams, Edward Baert (UGent) , HUGO VEREECKE (UGent) , Jean-Pierre Kalala Okito (UGent) , Cyriel Mabilde (UGent) , Bart Blanckaert (UGent) , et al.
(2014) SURGICAL INNOVATION. 21(3). p.303-311
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Organization
Abstract
Objective. Omnidirectional articulated instruments enhance dexterity. In neurosurgery, for example, the simultaneous use of 2 instruments through the same endoscopic shaft remains a difficult feat. It is, however, very challenging to manufacture steerable instruments of the requisite small diameter. We present a new technique to produce such instruments by means of laser cutting. Only 3 coaxial tubes are used. The middle tube has a cutting pattern that allows the steering forces to be transmitted from the proximal to the distal end. In this way the steering part is concealed in the wall of the tube. Large diameter articulated instruments such as for laparoscopy might benefit from the excellent tip stability provided by the same economical technology. Method. Coaxial nitinol tubes are laser-cut with a Rofin Stent Cutter in a specific pattern. The 3 tubes are assembled by sliding them over one another, forming a single composite tube. In a surgical simulator, the neurosurgical microinstruments and laparoscopic needle drivers were evaluated on surgical convenience. Results. Simultaneous use of 2 neurosurgical instruments (1.5 mm diameter) through the same endoscopic shaft proved to be very intuitive. The tip of the steerable laparoscopic instruments (10 mm diameter) could resist a lateral force of more than 20 N. The angle of motion for either instrument was at least 70 degrees in any direction. Conclusions. A new design for steerable endoscopic instruments is presented. It allows the construction in a range from microinstruments to 10-mm laparoscopic devices with excellent tip stability.
Keywords
laparoscopy, endoscopy, steerable, microinstruments, nitinol, laser, single port surgery, ASSISTED RADICAL PROSTATECTOMY, SURGERY, METAANALYSIS, NEUROENDOSCOPY, ENDOSCOPE

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Chicago
Dewaele, Frank, Alain F Kalmar, Frederic De Ryck, Nicolaas Lumen, Leonie Williams, Edward Baert, HUGO VEREECKE, et al. 2014. “A Novel Design for Steerable Instruments Based on Laser-cut Nitinol.” Surgical Innovation 21 (3): 303–311.
APA
Dewaele, Frank, Kalmar, A. F., De Ryck, F., Lumen, N., Williams, L., Baert, E., VEREECKE, H., et al. (2014). A novel design for steerable instruments based on laser-cut nitinol. SURGICAL INNOVATION, 21(3), 303–311.
Vancouver
1.
Dewaele F, Kalmar AF, De Ryck F, Lumen N, Williams L, Baert E, et al. A novel design for steerable instruments based on laser-cut nitinol. SURGICAL INNOVATION. 2014;21(3):303–11.
MLA
Dewaele, Frank, Alain F Kalmar, Frederic De Ryck, et al. “A Novel Design for Steerable Instruments Based on Laser-cut Nitinol.” SURGICAL INNOVATION 21.3 (2014): 303–311. Print.
@article{5696690,
  abstract     = {Objective. Omnidirectional articulated instruments enhance dexterity. In neurosurgery, for example, the simultaneous use of 2 instruments through the same endoscopic shaft remains a difficult feat. It is, however, very challenging to manufacture steerable instruments of the requisite small diameter. We present a new technique to produce such instruments by means of laser cutting. Only 3 coaxial tubes are used. The middle tube has a cutting pattern that allows the steering forces to be transmitted from the proximal to the distal end. In this way the steering part is concealed in the wall of the tube. Large diameter articulated instruments such as for laparoscopy might benefit from the excellent tip stability provided by the same economical technology.
Method. Coaxial nitinol tubes are laser-cut with a Rofin Stent Cutter in a specific pattern. The 3 tubes are assembled by sliding them over one another, forming a single composite tube. In a surgical simulator, the neurosurgical microinstruments and laparoscopic needle drivers were evaluated on surgical convenience.
Results. Simultaneous use of 2 neurosurgical instruments (1.5 mm diameter) through the same endoscopic shaft proved to be very intuitive. The tip of the steerable laparoscopic instruments (10 mm diameter) could resist a lateral force of more than 20 N. The angle of motion for either instrument was at least 70 degrees in any direction.
Conclusions. A new design for steerable endoscopic instruments is presented. It allows the construction in a range from microinstruments to 10-mm laparoscopic devices with excellent tip stability.},
  author       = {Dewaele, Frank and Kalmar, Alain F and De Ryck, Frederic and Lumen, Nicolaas and Williams, Leonie and Baert, Edward and VEREECKE, HUGO and Kalala Okito, Jean-Pierre and Mabilde, Cyriel and Blanckaert, Bart and Keereman, Vincent and Leybaert, Luc and Van Nieuwenhove, Yves and Caemaert, Jacques and Van Roost, Dirk},
  issn         = {1553-3506},
  journal      = {SURGICAL INNOVATION},
  keyword      = {laparoscopy,endoscopy,steerable,microinstruments,nitinol,laser,single port surgery,ASSISTED RADICAL PROSTATECTOMY,SURGERY,METAANALYSIS,NEUROENDOSCOPY,ENDOSCOPE},
  language     = {eng},
  number       = {3},
  pages        = {303--311},
  title        = {A novel design for steerable instruments based on laser-cut nitinol},
  url          = {http://dx.doi.org/10.1177/1553350613508015},
  volume       = {21},
  year         = {2014},
}

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