Force-shape self-sensing puncture needle based on light interference and long grating chirp effect

Abstract

The invention discloses a force-shape self-sensing puncture needle based on light interference and long grating chirp effect, which comprises a needle body, a positioning plane is arranged at one end of the needle body far away from a needle tip, Ng U-shaped grooves are uniformly arranged on the side wall of the needle body, first to Ng optical fibers are respectively arranged in the U-shaped grooves, Ng is greater than or equal to 3, and Ng is greater than or equal to 3. Each optical fiber is provided with a segment of chirp fiber grating and an F-P cavity, the chirp fiber grating is arranged at one end far away from the needle tip, the F-P cavity is arranged at one end close to the needle tip, and the chirp fiber grating and the F-P cavity are spaced by a certain distance. According to the invention, the precise monitoring of the whole trace morphological change of the puncture needle and the stress condition of the tip in the needle biopsy operation process is realized.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a force-shaped self-sensing puncture needle based on light interference and long grating chirp effect. Background technique [0002] In the process of clinical diagnosis, it is difficult to characterize the lesion only by imaging examination, and pathological examination of living tissue is the gold standard for diagnosis. In the clinical operation of percutaneous puncture surgery, the puncture needle needs to pass through the skin into the needle, and then reach the target point of the lesion through human tissue for material collection. Due to the intricate physiological structure of human tissues and organs, it is extremely difficult to accurately insert the needle in puncture surgery. Therefore, surgeons have an urgent need for real-time monitoring of the deformation of the puncture needle and the interaction force between the needle tip and human tissue. At present, the c...

AI Technical Summary

Problems solved by technology

However, at present, the deformation monitoring is only carried out through the distributed arrangement of fiber gratings. The measurement accuracy of the sensor in this way is affected by the position and quantity of the fiber gratings. A large number of simulations or experiments are required to optimize the sensor configuration scheme, and the design process takes more time. cost

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