ATTACHMENT TO A SURGICAL INSTRUMENT FOR MEASURING FORCE TO TEAR BIOLOGICAL TISSUE Russian patent published in 2023 - IPC A61B17/00 A61B3/10 A61F9/07 G01L5/101 

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to a nozzle on a surgical instrument for measuring the force to tear a biological tissue. The attachment includes a mount for a surgical instrument, sensors, an information processing module, and an information processing unit. The mount is connected to the sensors and the information processing module associated with the sensors. In this case, resistive thin-film pressure sensors with flexible force-sensitive resistors are used as sensors. The attachment to the surgical instrument is made of a mandrel, an additional mandrel and a fastening shell. The mandrel is made in the form of a sleeve with the possibility of rigid fastening on a surgical instrument. The additional mandrel includes a base and four legs, located at an equal distance from each other and intended for mating with the sections of the mandrel, on which the sensors are located. The fastening shell contains a cavity for sections of the surgical instrument protruding from the mandrel, two channels for wires, a cavity for placing the mandrel and an additional mandrel in such a way that the additional mandrel is fixed between the fastening shell and the mandrel. Resistive thin-film pressure sensors with flexible force-sensitive resistors are attached to the mandrel in areas associated with the legs of the additional mandrel with the possibility of a radial arrangement with respect to the axis of the surgical instrument. The sensors and the information processing module are interconnected by means of wires passed through the channels in the attachment shell.

EFFECT: increased accuracy of measurement of force for biological tissue rupture on a surgical instrument due to the use of a nozzle on a surgical instrument with four thin-film pressure sensors with flexible force-sensitive resistors located radially with respect to the axis of the surgical instrument, the possibility of attaching the nozzle to surgical instruments.

1 cl, 11 dwg, 2 tbl