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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Nonmetallic Guide Sheath with Negative Pressure Shapelocking Mechanism for Minimally Invasive Image-Guided Surgery
verfasst von : Siyang Zuo, Ken Masamune, Kenta Kuwana, Takeyoshi Dohi
Erschienen in: Computer Aided Surgery
Verlag: Springer Japan
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To address the access and stability problems in endoscopic surgery, we developed a device called rigid–flexible outer sheath. This sheath can be switched between flexible and rigid modes by a novel pneumatic shapelocking mechanism, and it has a double curvature structure that enables it to flex in four directions at the distal end and three directions on the rigid–flexible shaft. The prototype is 300 mm long with a 20 mm outer diameter, and equipped with four working channels. All parts of this device are made of plastic and are MRI-compatible. Insertion performance in a phantom experiment was evaluated in an open MRI environment. The experimental results showed that the outer sheath could follow a curved path, and that the sheath was compatible with an MRI environment. This means the outer sheath should be useful in surgery with MRI guidance.