Int J Med Robot - A piezoresistive tactile sensor for tissue characterization during catheter-based cardiac surgery.

Tópicos

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Resumo

CKGROUND: Currently, most of mitral valve annuloplasty surgeries are performed by using open heart surgery. However, if such operation would be performed by using minimally invasive surgery via catheter-based techniques (CBT), it offers various advantages for both surgeons and patients.METHODS: Two piezoresistive force sensors are used in the structure of the tactile sensor, which can easily be miniaturized and integrated into surgical catheters. The tactile sensor was fabricated and tested to characterize different elastomers, as the phantom of cardiac tissues. Based on a developed finite element analysis (FEA) of the elastomers, the interaction between the sensor and those materials were modelled to validate the output of the sensor.RESULTS: The results of the mechanical and psychophysical tests confirm the capability of the proposed sensor to measure the relative hardness/softness of different soft tissues.CONCLUSIONS: The proposed tactile sensor will help surgeons to characterize different types of cardiac tissues and would facilitate the use of CBT to perform mitral valve annuloplasty.

Resumo Limpo

ckground current mitral valv annuloplasti surgeri perform use open heart surgeri howev oper perform use minim invas surgeri via catheterbas techniqu cbt offer various advantag surgeon patientsmethod two piezoresist forc sensor use structur tactil sensor can easili miniatur integr surgic cathet tactil sensor fabric test character differ elastom phantom cardiac tissu base develop finit element analysi fea elastom interact sensor materi model valid output sensorresult result mechan psychophys test confirm capabl propos sensor measur relat hardnesssoft differ soft tissuesconclus propos tactil sensor will help surgeon character differ type cardiac tissu facilit use cbt perform mitral valv annuloplasti

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