Wire taking-out device

Abstract

The invention provides a taking-out device which is used for taking out a slender structure implanted in a body. The taking-out device comprises a control handle, a sheath tube connected to the far end of the control handle and an expansion head connected to the far end of the sheath tube, wherein the control handle comprises a driving piece and a rotating piece, one end of the rotating piece is connected with the near end of the sheath tube, the other end of the rotating piece is connected with the driving piece, and the driving piece is used for driving the rotating piece to rotate in two directions so as to drive the sheath tube and the expansion head to rotate in two directions. The expansion head can effectively cut fiber tissue wrapping the periphery of the slender structure, and other wires in a blood vessel can be prevented from being wound with one another and the situation that the blood vessel wall is twisted and scratched by the expansion head is prevented.

Description

technical field [0001] The invention relates to the technical field of interventional medical devices, in particular to a lead extraction device for taking out electrode leads implanted in a patient's body for a long time. Background technique [0002] Various medical treatments and surgical procedures require the implantation of elongated structures within the body of a human or veterinary patient. Such elongated structures may include catheters, sheaths, cardiac electrical leads (such as pacemaker leads or defibrillator leads), and various other devices. Among them, the pacemaker is usually implanted in the subcutaneous tissue pocket in the patient's chest wall, and the multiple leads of the pacemaker extend from the pacemaker to the chamber of the patient's heart through the vein; the defibrillator leads can be fixed inside the heart or external. [0003] In some cases, it is necessary to remove the lead implanted in the patient's body, such as the lead implanted in the...

AI Technical Summary

Problems solved by technology

[0004] However, in order to peel off the fibrous tissue growing around a wire, one or more cuttings of the cutting tip may be required. When the fibrous tissue is not completely separated from the wire, the cutting tip will continue to rotate along the original direction to cut the fiber easily. Tissues and wraps around the cutting tip, multiple turns in severe cases

In this case, the pulling of the blood vessel by the fibrous tissue may cause the blood vessel to be twisted and scratched by the expansion head; One of the wires is entangled together, so the difficulty of removing the electrode wire will be greatly increased

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