Non-contact detection method of two degree-of-freedom motion of interventional guide wire

Abstract

A non-contact detection method of two degree-of-freedom motion of an interventional guide wire belongs to the technical field of medical equipment and is realized by the following technical scheme: ensuring the interventional guide wire to penetrate through two sections of guide sleeves, placing a sensor circuit board above the interventional guide wire to ensure the detection focus of the sensorcircuit board to align with the interventional guide wire, adjusting the sensor circuit board to ensure that a sensor on the sensor circuit board can detect two-dimensional motion on the plane, then obtaining the proportional coefficients K1 and K2 after plane calibration and finally obtaining the linear motion distance L and the angle of rotation theta of the interventional guide wire through measuring and decoupling calculation. The invention is not only low in cost and convenient to install but also smaller in volume, higher in precision and convenient to exchange data with the computer, most of all, the detection part dispenses with direct contact with the object to be detected, thus greatly solving the problem of considering isolation and disinfection in later application.

Description

technical field [0001] The invention relates to a method in the technical field of medical devices, in particular to a non-contact detection method with two degrees of freedom of the plane and rotation of the intervention guide wire. Background technique [0002] Minimally invasive interventional surgery is an important method for tumor treatment. After making an incision in the patient's femoral artery, a hemostatic valve is placed, and the interventional guide wire is sent into the blood vessel. Under the guidance of X-ray images, the interventional guide wire is sent to the lesion, and then Cover the catheter with an intervention guide wire, send the catheter to the lesion along the intervention guide wire, then pull out the intervention guide wire to form a channel between the outside body and the lesion, and then send radiotherapy drugs or embolic agents along the catheter. This kind of operation is quickly accepted by doctors and patients because of its relatively simp...

AI Technical Summary

Problems solved by technology

[0003] (1) X-ray imaging is required during the operation, which exposes the operator to radiation hazards;

[0004] (2) The accuracy of manual intubation is low, and sometimes it is difficult or impossible to accurately locate the catheter to the lesion, making the treatment effect poor;

However, neither of them discussed in detail that the photoelectric encoder must be in direct contact with the intervention guide wire when detecting motion, and did not solve the problem of slipping when the friction between the intervention guide wire and the encoder wheel decreases.

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