Biopsy needle combination for bone puncture biopsy

Abstract

The invention relates to a biopsy needle combination for bone puncture biopsy. The biopsy needle combination comprises a solid puncture needle, a work channel sleeve and a cleaning rod, wherein the solid puncture needle is provided with a hollow pipe sampling needle with a cone-shaped front end, a section opening which is formed on the wall of a needle pipe and is in parallel with a needle pipe shaft and a cutting knife which is arranged on one side of the section opening and extends out tangentially along the circumference of the needle pipe; an angle of osculation of between 40 and 80 degrees is formed between the cutting knife and the section opening; the work channel sleeve is hollow; the length of the work channel sleeve is respectively smaller than the lengths of the solid puncture needle and the hollow pipe sampling needle; and the diameter of the cleaning rod is smaller than the inner diameter of the pore of the hollow pipe sampling needle and the length of the cleaning rod is greater than that of the hollow pipe sampling needle. By respective combination use of the components, the biopsy needle combination can overcome the defects of the conventional biopsy needle, reduces sampling scotomas, improves the extracting amount of tissue to be inspected and the biopsy accuracy, can avoid breakage of the needle and reduce the risk of the puncture biopsy and also can reduce medical cost because the biopsy needle combination has simples structure, is convenient to disassemble and sterilize and can be repeatedly used.

Description

technical field [0001] The invention relates to the field of clinical medical tissue examination, in particular to a biopsy needle combination for bone puncture tissue examination. Background technique [0002] In clinical medicine, the examination of movable tissue is to obtain the movable tissue to be inspected by means of local incision, forceps, extraction, scraping, etc. Obtaining pathological tissue from the living body of the patient for pathological examination is referred to as biopsy. The significance of biopsy lies in: because the tissue is fresh, it can basically preserve the truth of the disease, which is conducive to timely and accurate pathological diagnosis of the disease, and provides a basis for guiding treatment and estimating the prognosis; during disease observation or treatment, regular Biopsy can understand the development of lesions or judge the curative effect; fresh tissue is also conducive to the use of some new research methods, such as immunohis...

AI Technical Summary

Problems solved by technology

The biopsy needle with this axial movement cutting structure has the following disadvantages: 1. When the solid cutting needle core pierces the bone tissue at the sampling site, the needle will push the bone tissue around to form a hole, and the bone tissue will not disappear in a short time. Internal backfilling, in this state, when the solid cutting needle core retracts axially, the opening groove on the needle core often cannot cut the lesion tissue, or can only cut very little tissue, because less tissue is taken out, It is not enough for pathological examination, and repeated puncture sampling is often required, which increases the pain of the patient; 2. Because the diameter of the solid cutting needle core is small, the bone tissue corresponding to the opening groove is only a narrow range of 1.5 mm wide, and the sampling angle is only within a narrow range of 1.5 mm. Within the range of 100°, the blind spot area is large. Once the opening groove is not aligned with the lesion tissue, the biopsy-positive pathological tissue cannot be cut at all, resulting in wrong test results and a low biopsy success rate. 3. Most of the biopsy needles with this axial movement cutting structure are punctured once and sampled once. If the sampling is unsatisfactory or if you want to obtain more pathological tissues, you need to puncture again or multiple times, thus increasing the bleeding of the lesion tissue. The occurrence of complications such as repeated injury; 4. The needle head of the solid-cut needle core is a wedge-shaped structure, and the open groove is close to the needle head. After the open groove is set on the needle body with a diameter of only 1.5mm, the needle body at the open groove becomes thinner. Its mechanical strength is poor. If the target bone tissue is hard (such as bone tuberculosis calcification, etc.), it is easy to break the needle and leave it in the patient's body, which increases the risk of puncture examination; After the tumor, when the needle is pulled out, the puncture cannula in contact with the malignant tumor will come into contact with the normal bone tissue and the surrounding subcutaneous tissue, so it is difficult to avoid the complication of tumor metastasis along the needle track; 6. The structure of the biopsy needle with the axial movement cutting structure is more complicated , the price is expensive, and each biopsy needle can only be used once, which causes a great waste of medical resources and increases the economic burden of patients

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