Coaxial biopsy needle system special for thyroid nodules and control method of coaxial biopsy needle system

Abstract

The invention belongs to the technical field of medical devices, and discloses a coaxial biopsy needle system special for thyroid nodules and a control method of the coaxial biopsy needle system. A biopsy needle is connected with a coaxial biopsy needle in a matched mode, a protrusion is arranged on the handle portion of the biopsy needle, and an outer sleeve is connected to the protrusion in a clamped mode. A trigger and an ejector are fixed to the lower end of a handle, a depth adjusting button is embedded in the end of the handle, and a firing button is embedded in the end of the handle. The coaxial biopsy needle is adopted for needle insertion, the tip of the coaxial needle can be designed to be sharp, thus skin breaking and needle insertion are facilitated, after the coaxial needle reaches the edge of a nidus, materials are taken through a semi-automatic biopsy needle, the risk of nidus bleeding caused by repeated material taking can be reduced by using the coaxial biopsy needle,and material taking is more complete; by adopting the semi-automatic biopsy needle with a plurality of cutting grooves, the different cutting grooves can be selected according to the sizes of thyroidnodules, and materials are taken more accurately; and meanwhile, the coaxial needle is adopted for needle insertion without being limited by an ultrasonic stent, and the needle insertion angle can beadjusted to avoid important blood vessels.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a special coaxial biopsy needle system for thyroid nodules and a control method. Background technique [0002] At present, thyroid nodules refer to scattered lesions caused by local abnormal growth of thyroid cells. 5%-15% of thyroid nodules are malignant thyroid cancer, so it is very important to distinguish benign from malignant thyroid nodules. Ultrasound-guided biopsy can accurately locate and perform biopsy of thyroid nodules. It is one of the most reliable diagnostic methods for various thyroid diseases. Differential diagnosis of benign thyroid disease. Coarse needle biopsy and fine needle (22G-25G) aspiration biopsy are commonly used clinically. [0003] The advantage of crude needle biopsy is that the tissue strips taken out are relatively thick and complete. Not only can it cut into large pieces of thyroid tumor tissue at different levels, but it can also obtai...

AI Technical Summary

Problems solved by technology

Disadvantages: 1. First of all, due to the physiological structure of the neck skin, there are many folds in the neck skin, and it is difficult to insert a thick needle. An additional incision is required to insert the needle, otherwise the direction of needle insertion will be limited. At the same time, due to the difficulty of needle insertion, biopsy During the tissue process, the needle insertion angle is prone to deviate from the B-ultrasound guide line

2. Due to the rich blood supply of the thyroid gland, the incidence of bleeding complications in coarse needle puncture is higher than that of fine needle aspiration. Bleeding during puncture increases the distance of the echo of the lesion and affects the success rate of puncture

3. At present, the fully automatic biopsy needles commonly used in clinical practice need to be punctured with the assistance of an ultrasonic support, so the needle path design process cannot deviate from the range of the ejection direction due to the fixed angle, which often reduces the success rate of biopsy

4. Since the thyroid gland often has multiple nodules, there may be multiple nodules at the same time. For lesions <1cm, the shortest cutting groove of the current biopsy needle is often greater than 1cm. Most of them are normal thyroid tissue in the back, and there is more damage to the normal thyroid tissue in the back of the lesion. At the same time, multiple nodules often need to be inserted repeatedly, which increases the incidence of puncture complications.

[0007] (1) The physiological structure of the neck skin. There are many skin folds in the neck, and it is difficult to insert a thick needle. It is necessary to cut the skin additionally, otherwise the direction of needle insertion will be restricted. At the same time, due to the difficulty of needle insertion, the biopsy tissue Prone to needle deviation leading to B-ultrasound guide line

[0008] (2) Due to the rich blood supply of the thyroid gland, the complication rate of bleeding complications of coarse needle aspiration is higher than that of fine needle aspiration; sometimes bleeding during the puncture increases the distance of the lesion echo and affects the success rate of puncture

[0009] (3) At present, biopsies commonly used in clinical practice need to be punctured with the assistance of ultrasonic stents. Therefore, during the design process of the needle insertion path, the angle cannot deviate from the range of the ejection direction, and the needle insertion direction cannot be flexibly adjusted as needed during the needle insertion process, which often reduces the The success rate of taking materials

[0010] (4) Since the thyroid gland often has multiple nodules, there may be multiple nodules at the same time. When puncturing a lesion <1 cm, the shortest cutting groove of the current biopsy needle is often greater than 1 cm, and the ejection after reaching the edge of the lesion takes a small lesion sample , most of which are normal thyroid tissue in the rear, and there is more damage to the normal thyroid tissue behind the lesion. At the same time, repeated needle insertion is often required for multiple nodules, which increases the incidence of puncture complications.

The size of thyroid nodules is not uniform, and the length of the biopsy needle currently used is fixed, which makes the sampling of larger nodules incomplete, and the sampling of smaller nodules is excessive, causing unnecessary thyroid damage

[0011] (5) Fine-needle aspiration biopsy specimens are small, repeated punctures can make up for the shortcomings of insufficient sample volume, but repeated punctures increase the incidence of complications such as bleeding; since the fine needle size is 22-25G, B-ultrasound positioning is more difficult, And it is easily affected by swallowing by patients; fine-needle puncture tissue is finely divided, and it is impossible to obtain a complete capsule like coarse-needle puncture, which has obvious limitations in the identification of follicular thyroid cancer and the classification of thyroid cancer. It is difficult to obtain materials from hard or coarse calcified nodules; the length of the fine needle is 5-10cm, which cannot meet the requirements of deep nodules

Traditional biopsy needles are equipped with a push rod at the end of the needle to facilitate needle push, but the length of the push needle is fixed and single. Due to the uneven diameter of thyroid nodules, can the depth of the biopsy needle be adjusted more accurately, and different needle depths can be selected for different nodules , can measure the size of the nodule according to the patient's B-ultrasound, select a specific length, and avoid excessive or insufficient sampling due to the fixed sampling length during sampling, which has become a clinical problem that needs to be solved

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