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Recording forces exerted on the bowel wall during colonoscopy: in vitro evaluation.

Dogramadzi, S.; Virk, G. S.; Bell, G. D.; Rowland, R. S.; Hancock, J.


G. S. Virk

G. D. Bell

R. S. Rowland

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John Hancock
Professor in Cell Signalling


A novel system for distributed force measurement between the bowel wall and the shaft of a colonoscope is presented. The system, based on the piezoresistive method, involves the integration of soft miniature transducers to a colonoscope to enable a wide range of forces to be sensed. The attached sensing sheath does not restrict the propulsion of the colonoscope nor notably alter its flexibility. The addition of the sensor sheath increases the colonoscope diameter by 15-20% depending on the type of the colonoscope (adult or paediatric). The transducer's accuracy is +/-20 grammes if it is not subjected to extensive static forces. Under large static force conditions the errors may increase to +/-50 grammes. The tactile force measuring sensors have provided preliminary results from experiments on a model of the large bowel. The force measurements confirm the predictions on the location and magnitude of the forces and that most of the forces are exerted whilst the instrument is looping. Copyright 2005 John Wiley & Sons, Ltd.


Dogramadzi, S., Virk, G. S., Bell, G. D., Rowland, R. S., & Hancock, J. (2005). Recording forces exerted on the bowel wall during colonoscopy: in vitro evaluation. International Journal of Medical Robotics and Computer Assisted Surgery, 1(4), 89-97.

Journal Article Type Article
Publication Date Jan 1, 2005
Journal The international journal of medical robotics + computer assisted surgery : MRCAS
Print ISSN 1478-596X
Electronic ISSN 1478-596X
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 1
Issue 4
Pages 89-97
Keywords colonoscopy, bowel wall, forces, imaging
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