Measurement of friction on straight catheters in in vitro brain and phantom material

IEEE Transactions on Bio-medical Engineering
R C RitterW C Broaddus

Abstract

As part of our studies on the magnetic stereotaxis system (MSS), a means of delivering therapies to the bulk brain, we have measured the frictional forces on a thin, straight tube used to simulate a catheter. Experiments were done with a spring-loaded, stainless steel tube of 1.9-mm diameter which was passed through 5.5 cm of gelatin phantom or, alternatively, through in vitro calf brain. The dynamic response of the tube to sudden displacement of the outer end of the spring yields estimates of the tube's friction per unit length. Twenty-three runs in the two media were analyzed for the static and dynamic frictional forces exhibited. In these series the static frictional forces were found to be (0.0132 +/- 0.0012) N cm-1 [(1.32 +/- 0.12) g cm-1] of length in the gelatin phantom and (0.0079 +/- 0.0008) N cm-1 [(0.79 +/- 0.08) g cm-1] of length in brain. The kinetic friction coefficient, b, was found to be (8.4 +/- 2.1) N s m-1/cm length of catheter in brain and (16.3 +/- 7.6) N s m-1/cm length of catheter in the phantom material. Based on these figures, the MSS will be capable of moving straight catheters of similar friction that are 20-cm long at rates of displacement of 0.02 to 0.05 cm s-1 in the white and grey matter of the br...Continue Reading

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Citations

Sep 20, 2012·Neuromodulation : Journal of the International Neuromodulation Society·Felicia S ManciuKevin E Bennet
Jan 17, 2014·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·Hani J MarcusGarnette R Sutherland
Feb 4, 2012·Journal of the Mechanical Behavior of Biomedical Materials·Johannes KerlFrank Beyrau
Jan 1, 2016·Medical & Biological Engineering & Computing·Marco AggraviDomenico Prattichizzo
May 4, 2011·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·Danilo De LorenzoGiancarlo Ferrigno
May 12, 2006·IEEE Transactions on Bio-medical Engineering·Winnie JensenUlrich G Hofmann
Feb 20, 2009·IEEE Transactions on Bio-medical Engineering·Andrew A SharpKen Gall
Jul 9, 1999·IEEE Transactions on Bio-medical Engineering·M A HowardG T Gillies
Aug 1, 2015·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·E BerettaE De Momi
May 22, 2016·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Van Khuyen BuiSeong Young Ko
Jul 9, 2010·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·L FrassonF Rodriguez y Baena

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