Biopsy needle

Abstract

The invention provides a biopsy needle which comprises a needle tube, a temperature sensing device and a sampling device, wherein the needle wall of the needle tube, which is close to one end of the needle tip, is axially provided with a groove, and the middle of the groove is provided with an annular groove along the circumfericial direction; the middle of a temperature sensor of the temperature sensing device is articulated on the inner wall of the needle tube on the top part of the groove to form a lever structure; one end of the temperature sensor is connected with a temperature sensing probe, while the other end is articulated with the upper end of a connecting rod; the lower end of the connecting rod is articulated with the upper end of a control rod of the temperature sensor, while the lower end of the control rod of the temperature sensor is connected with a temperature display; the sampling device comprises a sampling barrel, a sampling cutter and a sampling cutter control rod; the sampling barrel is vertically fixed in the middle of the temperature sensor and opens downwards; the sampling cutter forms an arc shape adapted to the annular groove along the peripheral direction; and the upper end of the sampling cutter control rod is connected with the sampling cutter, while the lower end is connected with a rotary button. The biopsy needle has convenient operation, small wound and more pertinence for obtaining materials, and the diagnosis rate is improved.

Description

technical field [0001] The invention relates to a medical device, in particular to a biopsy needle. Background technique [0002] Pleural or peritoneal effusion is a common clinical disease and often occurs. Because of its various causes, it is difficult to diagnose quickly and accurately, which in turn affects subsequent treatment, causing economic and health losses to patients and their families, and even delays in treatment. deterioration. At present, routine clinical diagnosis of etiology mainly relies on routine biochemistry of transpleural effusion, X-ray and CT, pleural effusion and sputum cytology, fiberoptic bronchoscopy, etc., which can assist in making etiological diagnosis for most patients, but there are still some patients who cannot be diagnosed. Such patients are often encountered in the Internet, and it is difficult to determine the etiology. According to literature reports, it is about 10% to 20%. [0003] Pleural biopsy has the advantages of simplicity, ...

AI Technical Summary

Problems solved by technology

However, the existing pleural biopsy also has many shortcomings and limitations: in the case of pleural effusion, the pleural lesions are not uniform, and the lesions are mostly limited to a certain part of the pleura or focal distribution. , It is highly suspected that malignant pleural effusion is not diffusely distributed on the pleura. Sometimes multiple biopsies in different parts are required to obtain a positive result. The traditional pleural biopsy needle takes less material at one time, which also limits the accuracy, and the false negative rate can reach 40%. The above, sometimes even need to take materials multiple times, causing physical and economic losses to patients

The traditional biopsy needle needs to be deep, and the lung tissue may be damaged when the amount of pleural fluid is small, and the depth of the biopsy cannot be controlled. It can only be done by hand feeling and the experience of the surgeon, and it is easy to cause damage

[0004] At present, the methods for obtaining peritoneal tissue samples include: laparotomy exploration and laparoscopic sampling. For these two techniques, patients have to bear the risk of anesthesia and surgery, and should not be widely used; the positive rate of ascites cytology is low; the traditional method Hook-needle peritoneal biopsy requires few tissues, high blindness, low diagnostic accuracy, and prone to complications such as injury and bleeding

On the other hand, peritoneal lesions vary in thickness, some are very thin and easy to penetrate by puncture; some peritoneal lesions are located deep in the viscera and difficult to penetrate

Therefore, it is difficult for the existing peritoneal biopsy needles to accurately and safely puncture the peritoneal tissue, nor can it ensure that the sample volume of peritoneal tissue is large enough without damaging the surrounding organs, such as intestines, etc.

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