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Multi-sensing tool for Minimally Invasive Surgery

Project description

Development of innovative tools for minimally invasive surgery

Minimally invasive surgery (MIS) procedures reduce tissue damage, postoperative analgesic requirements and blood loss, decrease hospitalisation time and provide better cosmetic results. The MIS limitations include restricted visual, haptic and tactile in-situ feedback, increasing the possibility of accidental tissue damage. The EU-funded PALPABLE project aims to introduce a new generation of MIS tools, focusing on an innovative tactile sensing palpation probe for the identification and visualisation of tissue abnormalities. The probe will incorporate multiple sensing modalities and a flexible, pneumatically actuated end-effector with distributed tactile sensors. Optical intensity variation in the sensing element will enable the identification of variations in the tissue stiffness.

Objective

PALPABLE introduces a new generation of MIS (Minimally Imvasive Surgery) tools: a novel tactile sensing probe as a palpation tool for identification and visualization of tissue abnormalities. MIS has several advantages (reduced tissue damage, postoperative analgesic requirements & blood loss, decreased hospitalization time, better cosmetic results), but there is limited or none visual, haptic, and tactile feedback in-situ, along with issues of tool dexterity. These issues can lead to accidental tissue damage. The probe (diam. 5mm, length 15-20mm) incorporates multiple sensing modalities and a thin, flexible, pneumatically actuated end-effector (3DOF, 180deg) with distributed sensors for distributed tactile sensing. The probe consists of the photonic sensing elements and a sphere held at the end of a circular tunnel by a steady flow of air. The sphere is free to rotate in all directions and can move into the channel when pressed against the airflow. When rolling over tissue, the displacement depends on the tissue’s stiffness and is picked up by the optical fibre above it. Optical intensity variation in the sensing element is used to identify tissue stiffness variations. The principle of measurement used is extrinsic light intensity modulation provided through optical fibres. A non-planar photonics circuit (200μm waveguide, 8bit colour depth) for haptic sensor array is developed and interfaced with the probe; this circuit will be engraved on ultra-thin polymeric foil. The foil sensing elements are distributed around & along the probe for multiple sensor inputs for palpation (i.e. stiffness), distance and curvature that are then fused to provide the overall tissue situation. Using thin foils allows for ease of integration with the probe and a straightforward manufacturing process to enable low cost in large volumes. The end effector is made from disposable or sterilizable materials, both options will be explored for recyclability or reusability respectively.

Coordinator

TWI ELLAS ASTIKI MI KERDOSKOPIKI ETAIREIA
Net EU contribution
€ 694 680,00
Address
L KIFSIAS 280
15232 Chalandri
Greece

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Αττική Aττική Βόρειος Τομέας Αθηνών
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Research Organisations
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Total cost
€ 694 680,00

Participants (7)

Partners (2)