Needle used for puncturing and positioning pulmonary nodule

Abstract

The invention relates to a needle used for puncturing and positioning a pulmonary nodule. The needle comprises a stylet and a sleeve, wherein the sleeve is a hollow cavity of which both ends are opened; one end of the stylet is provided with a hook-shaped structure which is restrained in the sleeve to realize contraction; and the other end of the stylet extends out of the sleeve, and a thickening part is arranged on the stylet and positioned in the sleeve. When the needle used for puncturing and positioning a pulmonary nodule, which is provided by the invention, is used, the needle used for puncturing and positioning a pulmonary nodule has the advantages of accurate positioning and difficult fall-off, and due to the improvement of the structure, pneumothorax is not easily caused in an operation process, so that necessary time is provided for an operator to accurately positioning a focus, and secondary injuries caused by repeated puncturing to a patient are avoided; and meanwhile, the risk of bringing the secondary injuries to the patient is also eliminated by a fixing device at the tail part of the stylet.

Description

technical field [0001] The invention relates to the field of puncture positioning, in particular to a needle used for puncture positioning of pulmonary nodules and a method for puncture positioning. Background technique [0002] Regarding the diagnosis and treatment of small pulmonary nodules, since the mid-1990s, domestic and foreign literature have successively reported a variety of preoperative and / or intraoperative lesion localization methods, such as injection of methylene blue, iodized oil, and intraoperative application of ultrasound. localization methods, but these methods have their disadvantages: injection of methylene blue into the lung parenchyma around the nodules may cause dye staining in the pleura and the thoracic cavity, making it difficult for video-assisted thoracoscopic (VATS) operators to identify specific lesions location; preoperative CT-guided injection of iodized oil and other contrast agent positioning method also has the disadvantage of contrast ag...

AI Technical Summary

Problems solved by technology

[0002] Regarding the diagnosis and treatment of small pulmonary nodules, since the mid-1990s, domestic and foreign literature have successively reported a variety of preoperative and / or intraoperative lesion localization methods, such as injection of methylene blue, iodized oil, and intraoperative application of ultrasound. localization methods, but these methods have their disadvantages: injection of methylene blue into the lung parenchyma around the nodules may cause dye staining in the pleura and the thoracic cavity, making it difficult for video-assisted thoracoscopic (VATS) operators to identify specific lesions location; preoperative CT-guided injection of iodized oil and other contrast agent positioning method also has the disadvantage of contrast agent diffusion, and requires real-time CT examination equipment in the operating room, the process is relatively cumbersome; ultrasound positioning, due to its relatively low resolution, It is difficult to observe sub-centimeter nodules well, especially the pulmonary ground-glass opacity (GGO) lesions. At the same time, intraoperative ultrasound has high requirements on the level of the operator, and professionally trained personnel are required to operate, and ultrasound positioning needs to be checked Patients with complete lung collapse can be well positioned, and patients with complete lung collapse usually suffer from poor postoperative recovery. These factors limit the application of ultrasound positioning

[0007] 2. Needles designed for puncture positioning of breast masses are likely to cause pneumothorax when puncturing pulmonary nodules, resulting in hasty operation and affecting the operation effect. This is due to the anatomical characteristics of the lung. When the puncture needle penetrates the chest wall and has not yet entered the lung tissue , due to the barb-like design at the end of the puncture needle, and the relative movement of the needle core and the needle tube, it is inevitable that there will be air leakage between the needle tube and the needle core, and the outside air may enter the pleural cavity during operation, thereby cause pneumothorax

However, rapid operation can easily lead to inaccurate positioning of the lesion, and repeated punctures will increase patient damage

[0008] 3. The length of the puncture positioning needle for a breast mass is only 7cm, and the thickness of the patient's chest wall is generally 3-5cm, and the thickness of the chest wall can reach 7cm, resulting in the puncture needle being too short, and in some cases it is impossible to puncture to reach the target position

However, due to the characteristics of the lung, the needle core is easily brought into the chest cavity when the lung tissue moves up and down during the breathing movement. Sometimes the needle core is lost in the chest wall or lung tissue. If the needle core cannot be found, it may become a foreign body residue In the body, finding the needle core during the operation will waste a lot of time and increase the risk of surgery for the patient

Although the B-ultrasound positioning and guiding system can be used for tumor positioning and puncture in many parts in actual work, for the lungs, B-ultrasound cannot be used for the examination of pulmonary nodules due to the obstruction of the ribs

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