Puncture Positioning System for Meniscal Sutures

Abstract

The invention provides a puncture locating system applicable to meniscus suture. The puncture locating system comprises a puncture needle (1), an optical fiber force sensor (2), a cavity (3), a near-end solenoid coil (4) and a far-end solenoid coil (5), wherein the optical fiber force sensor (2) is arranged on the tube wall at a far end part of the puncture needle (1), and iron powder is arranged in the cavity (3); the near-end solenoid coil (4), the cavity (3) and the far-end solenoid coil (5) are arranged sequentially. When the optical fiber force sensor detects that the far end of the puncture needle reaches a soft tissue interface, the iron powder is attracted to the near end and the far end of the cavity alternately, so that density distribution in the cavity is changed alternately, the far end part of the puncture needle in an ultrasonographic image is obviously different from other static parts, and the fact that the far end of the puncture end is located in the interface of the soft tissue at the moment can be known.

Description

technical field [0001] The invention relates to puncture positioning, in particular to a puncture positioning system suitable for meniscal suture. Background technique [0002] Meniscus tear is a relatively common sports injury, mostly caused by torsional external force. The tear is usually not easy to heal. Once diagnosed, it should be treated in time according to the injury situation. Currently, minimally invasive arthroscopic meniscoplasty or meniscus suture is the mainstay of treatment for meniscus tears. [0003] In the process of suturing the meniscus in the joint cavity, the speed and success of the entire operation will be affected by the precise penetration of the suturing needle from the meniscus tear through the meniscus tissue to the outside of the joint capsule. At present, the puncture of the meniscus from inside to outside is done blindly, basically relying on the hand feel of the puncture needle at the soft tissue interface and the rough estimation of the pu...

AI Technical Summary

Problems solved by technology

The traditional ultrasonic puncture navigation mainly adopts the guiding device method. This technology is relatively mature, but the angle between the direction of the puncture needle and the sound beam is still small, and the puncture needle is not parallel to the scanning plane, which easily leads to misjudgment of the position of the needle tip. Partial volume effect also often causes errors in monitoring and guidance, and the judgment of the location of the lesion largely depends on the experience of clinicians and other shortcomings, which can easily lead to puncture errors, trauma and complications

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