CN211583268U - Mammary gland biopsy pilot needle - Google Patents

Abstract

The utility model discloses a breast biopsy positioning needle, relating to the technical field of medical instruments, comprising a trocar, wherein an inner hole penetrating through the trocar is arranged in the trocar; and preset and be in the location seal wire of hole, its holder that is located the location end of front side and is located the rear side, the location end with the holder passes through seal wire connecting portion and connects, the location end is including the location syringe needle, location syringe needle front end is provided with the barb, the holder includes the second of being connected with seal wire connecting portion and adds thick rod iron, the second adds thick rod iron front end and is located in the hole. Above-mentioned technical scheme adds thick rod iron through the design second, makes the easy centre gripping of location seal wire and fixed at the normal position, and second adds thick rod iron front end and is located the hole, at the in-process of removing the trocar, location seal wire atress, and the location seal wire can not take place bending deformation yet to ensure that the location seal wire can be firmly fixed in the position of focus.

Description

Mammary gland biopsy pilot needle

Technical Field

The utility model relates to the technical field of medical equipment, in particular to breast biopsy positioning needle.

Background

Breast cancer is the most common malignant tumor in women worldwide, and currently, in China, breast cancer is also the first malignant tumor in women. According to the pathological classification, breast cancer can be classified into Ductal Carcinoma In Situ (DCIS), Invasive Ductal Carcinoma (IDC), Invasive Lobular Carcinoma (ILC), and the like. DCIS is widely considered as a precursor lesion of IDC, theoretically has no systemic metastasis capability, and can be cured by comprehensive treatment such as surgery. In recent years, although the incidence of breast cancer has increased year by year, the mortality rate has decreased year by year, owing to the increasing proportion of new breast cancer that is caused by DCIS and the increasing level of comprehensive treatment. At least 90% of DCIS was found in mammography screening, most of which appeared as microcalcifications. Since calcific foci are clinically inaccessible and most are difficult to locate under ultrasound, resection biopsies of calcific foci need to be performed under X-ray guidance, i.e. X-ray guided breast calcific focus resection biopsies.

The method comprises the steps of firstly carrying out X-ray radiography on a mammary gland calcification focus of a patient, shooting at least three mammary gland calcification focus X-ray pictures from different angles (0 degrees, +15 degrees and-15 degrees), then synthesizing the pictures from different angles through a computer, calculating the accurate position of the calcification focus in a mammary gland, transmitting position information back to a positioning biopsy device fixed on a mammary gland X-ray machine, inserting a biopsy positioning needle into mammary tissue through a puncture hole in the positioning biopsy device, and enabling the needle point to reach a preset depth.

The breast biopsy positioning needle comprises a trocar and a positioning guide wire pre-retained in the trocar, when the positioning guide wire is inserted into a preset depth, one hand fixes the positioning guide wire, the other hand pulls out the trocar, theoretically, the trocar is pulled out of breast tissue, the positioning guide wire pre-retained in the breast tissue is retained in the breast tissue, the front end of the positioning guide wire is provided with a barb, and when the positioning guide wire is released, the barb is changed from a closed state to an open state and is firmly hooked in breast lesion tissue, so that the positioning guide wire cannot be displaced in the operation, and a surgeon can accurately cut off the lesion tissue along the positioning guide wire.

In actual work, in the process of pulling out the trocar, due to the friction force of mammary tissue, the pulling out is labor-consuming, and at the moment, the positioning guide wire needs to be firmly fixed by the other hand and is slightly pushed in the direction opposite to the pulling out direction of the trocar so as to prevent the positioning guide wire from being brought out or displaced by the trocar.

However, in the breast biopsy positioning needle in the prior art, because the positioning guide wire is thin, very soft and insufficient in rigidity, in the process of removing the trocar, the positioning guide wire needs to be fixed by another hand, and is not easy to be clamped by surgical instruments, and is difficult to be fixed in the original position due to bending deformation after being stressed, therefore, in the actual surgical operation, after the trocar is pulled out, the positioning guide wire cannot be fixed at the depth calculated in advance by a computer, and axial displacement occurs, so that the insertion depth of the positioning guide wire becomes shallow, and the positioning is not accurate. Because the calcified focus of the mammary gland is usually tiny and invisible to naked eyes, the inaccuracy of positioning can cause the operation difficulty to be increased rapidly, sometimes the calcified focus can not be cut off accurately, and the operation fails.

In the positioning guide wire in the prior art, a thickened steel bar with the length of 2.5cm is arranged at the position 2cm away from the tip of the positioning guide wire, so that the positioning in the operation is facilitated. The principle is as follows: when the trocar is pulled out, the positioning guide wire is released, the X-ray radiography is carried out again, the relative position of the calcification stove and the thickened steel bar is measured on the image, in the operation, the thickened steel bar is found after the mammary gland tissue is cut because the calcification stove is invisible to naked eyes, the position of the calcification stove is judged according to the relative position judged before the operation, and the accurate cutting is carried out. Because in the current location seal wire, add thick rod iron and sharp-end have 2 cm's length, be difficult to accurate judgement calcification kitchen accurate position, lead to current operation often the precision not enough to lead to excision tissue scope increase, the operation damage increases.

Disclosure of Invention

The utility model discloses aim at solving one of the above-mentioned technical problem among the prior art to a certain extent at least. Therefore, the embodiment of the utility model provides a mammary gland biopsy pilot needle, at the in-process of removing the trocar, the inside location seal wire that presets of trocar can not take place to shift.

The breast biopsy positioning needle comprises a trocar, wherein an inner hole penetrating through the trocar is formed in the trocar; and preset and be in the location seal wire of hole, its holder that is located the location end of front side and is located the rear side, the location end with the holder passes through seal wire connecting portion and connects, the location end is including the location syringe needle, location syringe needle front end is provided with the barb, the holder includes the second of being connected with seal wire connecting portion and adds thick rod iron, the second adds thick rod iron front end and is located in the hole.

In an alternative or preferred embodiment, the positioning needle is provided with a marking steel bar, and the marking steel bar is positioned in the middle of the positioning needle. Through the technical scheme, the marking steel bar is clear and visible in the X-ray radiography and operation process, can help to accurately judge the relative position of the focus before and during the operation, and is beneficial to positioning and accurate excision of the focus.

In an optional or preferred embodiment, the second thickened steel bar is provided with an identification point, the identification point is located outside the trocar, and by means of the technical scheme, the removal distance of the trocar can be judged through the identification point.

In an alternative or preferred embodiment, the length of the barb is defined as the barb length, and the initial distance of the marker point from the trocar is defined as the marker distance, which is not less than the barb length. Through the technical scheme, in the process of pulling out the trocar, the marking distance between the rear end of the trocar and the marking point is gradually shortened, and the trocar can be used for judging whether the barb in the positioning end of the positioning guide wire is released in a focus or not.

In an alternative or preferred embodiment, the trocar comprises a needle tube and a needle seat, the front part of the needle tube is provided with a tip, the barb is closed and arranged in the needle tube, and the barb is flush with the tip of the needle tube.

In an alternative or preferred embodiment, the marker distance is the distance between the marker point and the rear end of the needle hub.

In an alternative or preferred embodiment, the outside of the needle tube is marked with interval marks, and the interval marks comprise equidistant scale marks.

In an alternative or preferred embodiment, the positioning end further comprises a first thickened steel bar connected with the positioning needle, and the guide wire connecting part is connected with the first thickened steel bar.

In an alternative or preferred embodiment, the barbs are V-shaped.

In an alternative or preferred embodiment, a guide wire extension is further connected to the rear end of the second thickened steel rod.

Based on the technical scheme, the embodiment of the utility model provides a following beneficial effect has at least: above-mentioned technical scheme adds thick rod iron through the design second, makes the easy centre gripping of location seal wire and fixed at the normal position, and second adds thick rod iron front end and is located the hole, at the in-process of removing the trocar, location seal wire atress, and the location seal wire can not take place bending deformation yet to ensure that the location seal wire can be firmly fixed in the position of focus.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural view of a trocar according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the positioning guide wire in the embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the positional or orientational descriptions, such as the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., are the positional or orientational relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, if the terms "first" and "second" are used, they are used for distinguishing technical features, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, "a plurality" means one or more, "a plurality" means two or more, "more than", "less than", "more than" and the like are understood as excluding the present number, "more than", "less than", "more than" and the like are understood as including the present number, unless otherwise specifically limited.

In the description of the present invention, unless explicitly defined otherwise, terms such as "set", "arrange", "install", "connect", "fix" and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.

In the description of the present invention, unless otherwise expressly limited, a first feature "on" or "under" a second feature may be directly contacting the first feature or the second feature or indirectly contacting the first feature or the second feature through intervening media. Also, a first feature may be "on" or "over" or "on" a second feature, and may be directly on or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature being "under" or "beneath" a second feature may be directly under or obliquely under the second feature, or simply indicate that the first feature is at a lesser level than the second feature.

Referring to fig. 1 to 3, a breast biopsy positioning needle comprises a trocar 100 and a positioning guide wire 200, wherein the trocar 100 is internally provided with an inner hole penetrating through the front and the back. In this embodiment, "front", "back" and "back" are for convenience of describing the specific structure of the breast biopsy positioning needle, and are not limited thereto, and in this embodiment, the insertion end of the trocar 100 is a front end, and the operation end is a back end. Before operation, the positioning guide wire 200 is pre-arranged in the inner hole, that is, the positioning guide wire 200 can move axially relative to the trocar 100, it can be understood that, as shown in fig. 1, the rear end of the positioning guide wire 200 is not arranged in the inner hole, and in actual operation, when the trocar 100 is pulled out, the front end of the positioning guide wire 200 firstly exits from the inner hole.

The positioning guide wire 200 includes a positioning end 210 at the front side and a clamping end 220 at the rear side, and the positioning end 210 and the clamping end 220 are connected by a guide wire connecting portion 230. The positioning end 210 comprises a positioning needle 211, a barb 213 is arranged at the front end of the positioning needle 211, the clamping end 220 comprises a second thickened steel bar 221 connected with the guide wire connecting part 230, and the front end of the second thickened steel bar 221 is arranged in the inner hole. Further, the positioning end 210 further includes a first thickened steel bar 212 connected to the positioning needle 211, the guide wire connecting portion 230 is connected to the first thickened steel bar 212, and the rear end of the second thickened steel bar 221 is further connected to the guide wire extending portion 222.

The trocar 100 comprises a needle tube 101 and a needle seat 102, wherein the front part of the needle tube 101 is provided with a tip, the barb 213 is V-shaped, the positioning guide wire 200 is preset in the trocar 100 before use, the tip of the barb 213 of the positioning guide wire 200 is flush with the tip of the needle tube 101, and the V-shaped barb 213 is preset in the inner hole of the needle tube 101 in a closed state.

The front end of the second thickened steel bar 221 of the clamping end 220 is inserted into the inner hole of the trocar 100, and the rear end is exposed out of the needle seat 102 of the trocar 100, so that after the needle tube 101 of the trocar 100 penetrates into a focus, the second thickened steel bar 221 of the clamping end 220 is clamped and fixed to accurately release the positioning guide wire 200 into the focus. Preferably, during the positioning operation, needle cannula 101 is inserted into the breast tissue to a predetermined depth, leaving hub 102 outside the body. The needle tubing 101 is carved with the interval sign in the outside, and the interval sign includes the scale mark of equidistance, and in this embodiment, adjacent scale mark interval 1cm adopts black scale mark to sign for the degree of depth that the sign needle tubing 101 inserted the mammary tissue.

First, in the embodiment of the present invention, the length of the second thickened steel bar 221 of the clamping end 220 is 50mm, the diameter of the second thickened steel bar is smaller than the inner hole of the trocar 100, the front end of the second thickened steel bar is inserted into the inner hole of the trocar 100, the diameter of the second thickened steel bar 221 is larger than that of the current guide wire, so as to facilitate the clamping of the surgical instrument, and the positioning guide wire 200 and the surgical instrument clamping the same cannot be displaced relatively in the clamping process; meanwhile, because the rigidity of the second thickened steel bar 22 is enhanced, the positioning guide wire 200 is favorably and firmly fixed in place, and the front end of the second thickened steel bar 221 of the clamping end 220 is inserted into the inner hole of the trocar 100, so that the positioning guide wire 200 is not bent and deformed when the trocar 100 is pulled out and the positioning guide wire 200 is fixed.

Secondly, in the embodiment of the present invention, it is further preferable that the second thickened steel bar 221 is provided with a mark point 223, and the mark point 223 is located outside the trocar 100. Specifically, the length of the barb 213 is defined as the barb length, the distance of the marker point 223 from the trocar 100 is defined as the marker distance, the marker distance is not less than the barb length, and the marker distance is the distance of the marker point 223 from the rear end of the needle hub 102. Note that the indication distance is not less than the barb length, which means that the barb length is the axial length of the barb 213 in the closed state, and the indication distance is the distance between the indication point 223 and the rear end of the needle seat 102 when the tip of the barb 213 of the positioning guide wire 200 is flush with the tip of the needle tube 101. It can be understood that, when the trocar 100 is pulled out, the positioning guide wire 200 is firmly fixed in place, so that the relative distance between the mark point 223 added on the second thickened steel bar 221 of the clamping end 220 on the positioning guide wire 200 and the needle seat 102 of the trocar 100 is reduced, and the naked eye can judge whether the positioning guide wire 200 is axially displaced along with the pulling out of the trocar 100, thereby ensuring the positioning accuracy. In this embodiment, the length of the barb 213 is 9mm, when the marking point 223 completely enters the needle seat 102 of the trocar 100 during the extraction of the trocar 100, it indicates that the barb 213 has completely released outside the needle tube 101 of the trocar 100, the barb 213 hooks the mammary tissue in a V shape, and at this time, the positioning guide wire 200 has completely released, so that the trocar 100 can be safely and quickly and completely extracted.

Thirdly, in the embodiment of the utility model, the location syringe needle 211 is provided with the sign rod iron 214, and the sign rod iron 214 is located the location syringe needle 211 middle part. The length of the marking steel rod 214 is 2mm, the distance between the marking steel rod 214 and the first thickened steel rod 212 of the positioning end 210 is 9mm, the distance between the rear end of the marking steel rod 214 and the front end of the first thickened steel rod 212 is referred to herein, and the distance between the marking steel rod 214 and the tip of the barb 213 in the positioning needle 211 is 9 mm. After the trocar 100 is pulled out and the positioning guide wire 200 is completely hooked and fixed in the mammary tissue, the positions of the focus and the positioning guide wire 200 need to be determined again through the molybdenum target, the marking steel rod 214 and the first thickened steel rod 212 at the positioning end are clearly visible in the molybdenum target photograph and the operation visual field, the position of the focus can be judged before and during the operation, and at the moment, the position of the focus can be accurately positioned by an operating doctor in the operation process through the relative positions of the focus displayed in the molybdenum target, the marking steel rod 214 and the first thickened steel rod 212 at the positioning end 210, so that the accurate excision of the focus is facilitated.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. A breast biopsy positioning needle is characterized in that: comprises that

A trocar (100) having an inner hole penetrating through the front and rear portions; and

preset and be in location seal wire (200) of hole, it is including location end (210) that are located the front side and the exposed core (220) that are located the rear side, location end (210) with exposed core (220) are connected through seal wire connecting portion (230), location end (210) are including location syringe needle (211), location syringe needle (211) front end is provided with barb (213), exposed core (220) are including the second of being connected with seal wire connecting portion (230) with thick rod iron (221), the second adds thick rod iron (221) front end and is located in the hole.

2. The breast biopsy positioning needle of claim 1, wherein: the location syringe needle (211) is provided with sign rod iron (214), sign rod iron (214) are located location syringe needle (211) middle part.

3. The breast biopsy positioning needle of claim 1, wherein: the second thickened steel bar (221) is provided with an identification point (223), and the identification point (223) is located outside the trocar (100).

4. The breast biopsy positioning needle of claim 3, wherein: the length of the barb (213) is defined as a barb length, and the distance from the identification point (223) to the trocar (100) is defined as an identification distance which is not less than the barb length.

5. The breast biopsy positioning needle of claim 4, wherein: the trocar (100) comprises a needle tube (101) and a needle seat (102), the front part of the needle tube (101) is provided with a tip, the barb (213) is closed and arranged in the needle tube (101), and the barb (213) is flush with the tip of the needle tube (101).

6. The breast biopsy positioning needle of claim 5, wherein: the identification distance is the distance between the identification point (223) and the rear end of the needle seat (102).

7. The breast biopsy positioning needle of claim 5, wherein: the needle tubing (101) outside is carved with the interval sign, the interval sign includes the scale mark of equidistance.

8. The breast biopsy positioning needle according to any one of claims 1 to 7, wherein: the positioning end (210) further comprises a first thickened steel bar (212) connected with the positioning needle (211), and the guide wire connecting part (230) is connected with the first thickened steel bar (212).

9. The breast biopsy positioning needle according to any one of claims 1 to 7, wherein: the barb (213) is V-shaped.

10. The breast biopsy positioning needle according to any one of claims 1 to 7, wherein: the rear end of the second thickened steel bar (221) is also connected with a guide wire extension part (222).

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