Int J Comput Assist Radiol Surg - Tactile sensor using acoustic reflection for lump detection in laparoscopic surgery.

Tópicos

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Resumo

RPOSE: Laparoscopic surgery limits a surgeon's tactile sense. A tactile sensor could allow real-time tumor detection in laparoscopic surgery through lump inspection. This study was aimed at developing a simple and biocompatible tactile sensor for laparoscopic surgery. The proposed tactile sensor has a forceps-like shape, has no electrical elements in the tissue contact area, and can be sterilized and cleaned.METHODS: We developed a tactile sensor using acoustic reflection. It is composed of a handle with a speaker and a microphone, an aluminum tube, and a sensor tip with a deformable elastic cavity. The acoustic wave in the tube is the superposition of the input wave and two waves reflected at the closed edge and the projection generated by deformation due to contact with an object. By measuring the acoustic wave in the tube, information of the deformation is derived.RESULTS: The sensor is modeled, and the output is analyzed to determine design parameters of the sensor. Then, a prototype of the sensor is assembled. Fundamental experiments show that the sensor output increases with increasing normal deformation. Moreover, experiments using a phantom of the stomach wall with a 0-IIc type tumor (most common early stage gastric cancer) show that large sensor output is obtained for the lump when the sensor is moved across the back surface of the tumor.CONCLUSIONS: The theoretical and experimental results show that the sensor is sensitive to the deformation due to contact with an object and has the potential to detect a lump in laparoscopic surgery.

Resumo Limpo

rpose laparoscop surgeri limit surgeon tactil sens tactil sensor allow realtim tumor detect laparoscop surgeri lump inspect studi aim develop simpl biocompat tactil sensor laparoscop surgeri propos tactil sensor forcepslik shape electr element tissu contact area can steril cleanedmethod develop tactil sensor use acoust reflect compos handl speaker microphon aluminum tube sensor tip deform elast caviti acoust wave tube superposit input wave two wave reflect close edg project generat deform due contact object measur acoust wave tube inform deform derivedresult sensor model output analyz determin design paramet sensor prototyp sensor assembl fundament experi show sensor output increas increas normal deform moreov experi use phantom stomach wall iic type tumor common earli stage gastric cancer show larg sensor output obtain lump sensor move across back surfac tumorconclus theoret experiment result show sensor sensit deform due contact object potenti detect lump laparoscop surgeri

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