DocumentCode :
139294
Title :
Needle geometry, target migration and substrate interactions in high resolution
Author :
Oldfield, Matthew ; Leibinger, Alexander ; Kaufmann, Pia-Afra ; Bertucchi, Marine ; Beyrau, Frank ; Rodriguez y Baena, Ferdinando
Author_Institution :
Dept. of Mech. Eng., Imperial Coll. London, London, UK
fYear :
2014
fDate :
26-30 Aug. 2014
Firstpage :
852
Lastpage :
855
Abstract :
Recent investigations considering flexible, steer-able needles for minimally invasive surgery have shown the significance of needle shape in determining the needle-tissue interactions leading to the access of targets. Digital Image Correlation has enabled internal deformation and strain caused by needle insertions to be seen in a soft tissue phantom at high resolution for the first time. Here, the impact of tip design on strains and displacements of material around the insertion axis is presented using Digital Image Correlation in a stable, plane-strain configuration. Insight into the shape of needles to minimise tissue trauma and generate interactions that would enable optimal steering conditions is provided. Needle tips with an included bevel angle up to 40° result in asymmetric displacement of the surrounding tissue phantom. Increasing the included tip angle to 60° results in more predictable displacement and strains that may enhance steering forces with little negative impact on the phantom.
Keywords :
biological tissues; biomechanics; biomedical optical imaging; deformation; image resolution; medical image processing; needles; optical correlation; phantoms; surgery; digital image correlation; displacements; flexible steerable needles; high resolution; internal deformation; minimally invasive surgery; needle geometry; needle insertions; needle shape; needle-tissue interactions; optimal steering conditions; soft tissue phantom; steering forces; strain; substrate interactions; target migration; tissue trauma; Blades; Geometry; Needles; Phantoms; Strain; Substrates;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Engineering in Medicine and Biology Society (EMBC), 2014 36th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
ISSN :
1557-170X
Type :
conf
DOI :
10.1109/EMBC.2014.6943725
Filename :
6943725
Link To Document :
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