Curved multi‐tube device for path‐error correction in a needle‐insertion system

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Abstract
Background: Needle insertion is an important procedure for the diagnosis and treatment of various diseases. A prototype curved multi‐tube device (CMTD) and system for performing computerized correction of path errors during needle insertion is described.Methods: The CMTD provides two functional modes, the straight‐needle mode and the curved‐needle mode. This study describes the CMTD and path‐error correction, using a prototype needle‐insertion system in a trial with a simple water phantom.Results: The needle insertion procedure was performed precisely in the centre of an ultrasound image. The CMTD functioned with the inner needle extending properly from its sleeve to correct path errors.Conclusions: The path‐error corrections by the CMTD in a needle‐insertion system were shown. The system's computer processing can successfully determine the needle path from the ultrasound image and automatically guide the CMTD to the target. Copyright © 2007 John Wiley & Sons, Ltd.

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