WO2022126651A1

WO2022126651A1 - Biopsy needle and full-automatic biopsy needle

Info

Publication number: WO2022126651A1
Application number: PCT/CN2020/137766
Authority: WO
Inventors: 王沁
Original assignee: 苏州市立普医疗科技有限公司
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2022-06-23

Abstract

A biopsy needle and a full-automatic biopsy needle; the biopsy needle comprises an inner needle (72), an inner needle base (71) connected to the inner needle (72), an outer needle (82), and an outer needle base (81) connected to the outer needle (82); a fastening structure is provided between the inner needle (72) and the inner needle base (71) and between the outer needle (82) and the outer needle base (81); relative movement generated between the inner needle (72) and the inner needle base (71) and between the outer needle (82) and the outer needle base (81) in the axis direction of the inner needle (72) and the outer needle (82) is limited by means of the fastening structures. The fastening structures can avoid inertial displacement of the inner needle (72) and the outer needle (82) caused by high-speed movement of the inner needle (72) and the outer needle (82), and can avoid separation of the inner needle (72) from the inner needle base (71), so that the inner needle (72) and the outer needle (82) are accurately matched in position, have an accurate triggering range, can accurately reach the position of a lesion according to a position set by a surgeon, and can protect the personal safety of medical personnel and patients; and the biopsy needle has the characteristics of a safe, reliable and stable structure.

Description

A kind of biopsy needle and automatic biopsy needle

technical field

The invention relates to the technical field of puncture equipment, in particular to a biopsy needle and an automatic biopsy needle.

Background technique

Tissue tumors are diseases that seriously endanger human health and life. In recent years, the incidence has gradually increased, and the age of onset has gradually decreased. Therefore, early and correct diagnosis of tissue tumors is of great significance. Correct diagnosis requires a combination of clinical, imaging and pathology. Among them, pathological diagnosis plays a key role in the selection of treatment plans, and needle biopsy is the main way to obtain tissue samples.

For needle biopsy of any part of the patient, such as prostate, kidney, liver, spleen, breast and other tissues, the main sampling device used during the operation is a biopsy needle, a qualified biopsy needle. The most basic requirements are accurate positioning and safe operation. , so that the operation can be successfully carried out, and the safety of the patient and the medical staff during the operation can be guaranteed.

The fully automatic biopsy needle is a commonly used device for puncture biopsy. During the puncture biopsy operation, the doctor takes out the biopsy needle from the packaging box and presses the corresponding two winding buttons respectively, so as to drive the inner and outer needles to shrink to a limited position, and the spring is compressed. , at this time the inner and outer needles are in the state to be excited. Under the guidance of the ultrasonic imaging equipment, after the puncture position is determined, push the excitation button, the inner and outer needles are released, and the rebound force released by the spring drives the inner and outer needles to move forward rapidly toward the lesion area. The excitation of the inner and outer needles has a time difference, that is, The inner needle enters the lesion first, and the outer needle enters later, so that a certain tissue sample can be obtained in the sampling groove of the inner needle.

When the biopsy needle is excited, the inner and outer needles are subject to a large rebound force, so the release speed is very fast. After the inner and outer needles reach the limited position, due to the existence of inertia, the needle seats of the inner and outer needles will exert a certain amount of force on the limiting structure. force. Therefore, if the inner and outer needles are not firmly connected to the corresponding needle bases, the inner and outer needles will move to a certain extent, so that the puncture needle cannot reach the preset position. In severe cases, the inner and outer needles may be separated. The fully automatic biopsy needle flies out, which brings certain hazards to the safety of patients and medical staff.

SUMMARY OF THE INVENTION

The invention provides a biopsy needle and an automatic biopsy needle. The inverted buckle structure can avoid relative displacement or separation between the inner needle and the inner needle needle seat, and between the outer needle and the outer needle needle seat, so that the inner needle and the outer needle can be separated from each other. The needle position is matched accurately, the excitation range is accurate, and the use is more safe and reliable.

One aspect of the present invention provides a biopsy needle, comprising an inner needle, an inner needle hub connected to the inner needle, an outer needle and an outer needle hub connected to the outer needle, and between the inner needle and the inner needle hub, An undercut structure is arranged between the outer needle and the outer needle seat; the relative movement between the inner needle and the inner needle seat and between the outer needle and the outer needle seat along the axis direction of the inner needle and the outer needle is restricted by the undercut structure .

Optionally, the outer wall of the inner needle is provided with a raised undercut structure, the undercut structure is located in the inner needle needle seat, and the inner needle needle seat is provided with a chamber for accommodating the undercut structure, or, the inner needle The outer wall is provided with a concave undercut structure, the undercut structure is located in the inner needle needle seat, and the inner needle needle seat is provided with a stopper for inserting the undercut structure.

Optionally, the outer wall of the outer needle is provided with a raised undercut structure, the undercut structure is located in the outer needle needle seat, and the outer needle needle seat is provided with a cavity for accommodating the undercut structure.

Optionally, the inner needle and the inner needle hub are integrally formed, and the outer needle and the outer needle hub are integrally structured.

Optionally, a raised undercut structure is provided on the outer wall of the inner needle, and the undercut structure includes at least one raised rib.

Optionally, the undercut structure includes a plurality of raised ribs, and the plurality of raised ribs are evenly arranged along the circumferential direction of the inner needle.

Optionally, a concave undercut structure is provided on the outer wall of the inner needle, and the undercut structure is a notch.

Optionally, the notch has a set width along the axial direction of the inner needle, and the depth of the notch is not less than the radius of the inner needle.

Optionally, the undercut structure includes a truncated sleeve, the first end of the sleeve is connected with the tail end of the outer needle, and the outer diameter of the first end is the same as that of the outer needle, and the outer diameter of the second end of the sleeve is the same as the outer diameter of the outer needle. The diameter is larger than the outer diameter of the first end; the end of the outer needle seat away from the needle tip of the outer needle is provided with a groove for accommodating the sleeve, the cross-section of the groove is in the shape of a bell mouth, and the outer wall of the sleeve and the side wall of the groove are in contact with each other. catch.

Another aspect of the present invention also provides a fully automatic biopsy needle, including the above biopsy needle.

In the technical solution provided by the present invention, an undercut structure is arranged between the needle body (including the inner needle and the outer needle) and the needle seat (including the inner needle needle seat and the outer needle needle seat), and the undercut structure plays a fixing role, which can make The needle body and the needle seat are connected more firmly.

When the biopsy needle is in use, the inverted structure can avoid the inertial displacement of the inner needle and the outer needle caused by their high-speed motion, and can avoid the separation of the inner needle and the inner needle holder, so that the inner needle and the outer needle can be accurately matched, and the excitation range is accurate. According to the position set by the surgeon, the location of the lesion can be accurately reached, and the personal safety of medical staff and patients can be protected. In the technical solution provided by the present invention, the biopsy needle has the characteristics of safe, reliable and stable structure.

Description of drawings

For purposes of illustration and not limitation, the present invention will now be described in accordance with preferred embodiments thereof, particularly with reference to the accompanying drawings, wherein:

1 is a cross-sectional view of an inner needle in a biopsy needle provided by an embodiment of the present invention;

2 is a cross-sectional view of an outer needle in a biopsy needle provided by an embodiment of the present invention;

Fig. 3 is a partial enlarged view of the inner needle seat in Fig. 1;

Fig. 4 is the structural representation of the inverted structure on the inner needle in Fig. 1;

Fig. 5 is a partial enlarged view of the outer needle hub in Fig. 2;

Fig. 6 is the structural representation of the inverted structure on the outer needle in Fig. 2;

7 is another structural schematic diagram of an inverted structure in a biopsy needle provided by an embodiment of the present invention;

Figure 8 is a cross-sectional view of the inverted buckle structure in Figure 7 in use;

9 is a schematic structural diagram of a fully automatic biopsy needle provided by an embodiment of the present invention;

FIG. 10 is an exploded view of the fully automatic biopsy needle provided by the embodiment of the present invention.

In the picture:

1: rear trigger button; 2: handle; 3: left slide rail; 4: right slide rail; 5: spring; 6: side trigger button; 7: inner needle assembly; 8: outer needle assembly; 9: front cover; 10: First winding button; 11: Second winding button; 71: Inner needle seat; 72: Inner needle; 81: Outer needle seat; 82: Outer needle; 722: Raised edge; 723: Notch; 822: sleeve.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related content, rather than limit the present application. For the sake of brevity, in the description of the various embodiments of the present application, the same or similar device/method steps are used with the same or similar reference numerals.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other if there is no conflict.

1 is a cross-sectional view of an inner needle in a biopsy needle provided by an embodiment of the present invention; FIG. 2 is a cross-sectional view of an outer needle in a biopsy needle provided by an embodiment of the present invention. As shown in FIGS. 1 and 2 , the biopsy needle includes an inner needle 72 , an inner needle hub 71 connected to the inner needle 72 , an outer needle 82 and an outer needle hub 81 connected to the outer needle 82 , the inner needle 72 and the inner needle Between the needle seat 71 and between the outer needle 82 and the outer needle needle seat 81, there is an undercut structure; the undercut structure restricts the space between the inner needle 72 and the inner needle needle seat 71, and between the outer needle 82 and the outer needle 82 seat Relative movement in the axial direction of the inner needle 72 and the outer needle 82 is produced.

The barb structure belongs to the limit structure in the axial direction of the inner needle 72 and the outer needle 82, and the barb structure can avoid the needle body (the inner needle 72 and the outer needle 82) and the needle seat (the inner needle needle seat 71 and the outer needle needle seat) 81) to produce axial movement or separation, making the connection between the needle body and the needle seat more firm. When the biopsy needle is in use, the inverted structure can avoid the inertial displacement of the inner needle 72 and the outer needle 82 caused by their high-speed motion, and can avoid the separation of the inner needle 72 and the inner needle 72 seat, so that the inner needle 72 and the outer needle 82 are matched in position. Accurate, accurate excitation range, can accurately reach the lesion position according to the position set by the surgeon, and protect the personal safety of medical staff and patients. In the technical solution provided by the present invention, the biopsy needle has the characteristics of safe, reliable and stable structure.

In the embodiment of the present invention, the outer wall of the inner needle is provided with a raised undercut structure, the undercut structure is located in the inner needle needle seat 71, and the inner needle needle seat 71 is provided with a chamber for accommodating the undercut structure, or The outer wall of the inner needle 72 is provided with a concave undercut structure, the undercut structure is located in the inner needle needle seat 71, and the inner needle needle seat 71 is provided with a block for inserting the undercut structure. The outer wall of the outer needle 82 is provided with a raised undercut structure, the undercut structure is located in the outer needle needle seat 81 , and the outer needle needle seat 81 is provided with a cavity for accommodating the undercut structure. The inner needle 72 is a solid structure, and the outer needle 82 is a hollow structure. Therefore, the undercut structure on the inner needle 72 can be a convex structure or a concave structure, while the undercut structure on the outer needle 82 is only a convex structure up the structure.

In the embodiment of the present invention, the inner needle 72 and the inner needle hub 71 are integrally constructed, and the outer needle 82 and the outer needle hub 81 are integrally constructed, wherein the inner needle 72 and the inner needle hub 71, and the outer needle 82 and the outer needle The needle seat 81 is integrally formed by injection molding, and the injection molding structure is adopted, so that the connection between the two is more tightly and firmly, and the stability of the connection between the needle body and the needle seat is further improved.

FIG. 3 is a partial enlarged view of the needle seat of the inner needle in FIG. 1 ; FIG. 4 is a schematic structural diagram of the inverted structure on the inner needle in FIG. 1 . As shown in FIG. 1 , FIG. 3 and FIG. 4 , the outer wall of the inner needle 72 is provided with a raised undercut structure, and the undercut structure includes at least one raised rib 722 . The inverted structure includes a plurality of raised ribs 722 , and the plurality of raised ribs 722 are evenly arranged along the circumferential direction of the inner needle 72 . The raised rib 722 enlarges the outer diameter of the inner needle 72, and this part of the structure is inserted into the inner needle needle seat 71, so that the inner needle 72 and the inner needle needle seat 71 are connected more firmly.

FIG. 7 is another structural schematic diagram of the undercut structure in the biopsy needle provided by the embodiment of the present invention; FIG. 8 is a cross-sectional view of the undercut structure in FIG. 7 when in use. As shown in Figures 7 and 8, the outer wall of the inner needle 72 is provided with a concave undercut structure, and the undercut structure is a notch 723. The notch 723 has a set width along the axial direction of the inner needle 72 , and the depth of the notch 723 is not less than the radius of the inner needle 72 . The inner needle seat 71 is provided with a corresponding protruding stopper, and the stopper is inserted into the notch 723 to form a firm limiting structure.

FIG. 5 is a partial enlarged view of the needle seat of the outer needle in FIG. 2 ; FIG. 6 is a schematic structural diagram of the inverted structure on the outer needle in FIG. 2 . As shown in FIG. 2, FIG. 5 and FIG. 6, the undercut structure includes a truncated truncated sleeve 822, the first end of the sleeve 822 is connected with the tail end of the outer needle 82, and the outer diameter of the first end is connected with the outer needle 82 have the same outer diameter, the outer diameter of the second end of the sleeve 822 is larger than the outer diameter of the first end; the end of the outer needle seat 81 away from the needle tip of the outer needle 82 is provided with a groove for accommodating the sleeve 822, and the cross section of the groove In the shape of a bell mouth, the outer wall of the sleeve 822 is in contact with the side wall of the groove. The inverted buckle structure is set as a circular truncated structure, which can not only play a limiting role, but also appropriately increase the diameter of the outer needle 82 to facilitate the insertion operation of the inner needle 72 .

FIG. 9 is a schematic structural diagram of the fully automatic biopsy needle provided by the embodiment of the present invention; FIG. 10 is an exploded view of the fully automatic biopsy needle provided by the embodiment of the present invention. As shown in FIGS. 9 and 10 , the fully automatic biopsy needle includes a power device, an inner needle assembly 7 and an outer needle assembly 8 . The power device includes the first winding button 10, the second winding button 11, the handle 2, the front cover 9, the side trigger button 6, the rear trigger button 1, the left slide rail 3, the right slide rail 4 and the spring 5, the inner needle assembly 7 Including an inner needle 72 and an inner needle hub 71 , the outer needle assembly 8 includes an outer needle 82 and an outer needle hub 81 .

Continue to refer to Figure 9 and Figure 10, as shown in the figure, when using the automatic biopsy needle, confirm the appropriate range according to the location and size of the lesion; follow the direction of the arrow on the first winding button 10, press the first winding Push the button 10 to the limited position, at this time, the outer needle 82 shrinks to the limited position; along the direction of the arrow on the second winding button 11, press the second winding button 11 to the limited position, at this time, the inner needle 72 shrinks to the limited position. Under the guidance of the ultrasound imaging equipment, confirm that the biopsy needle has penetrated the corresponding part of the human body. At this time, push the activation button (side activation button 6 or rear activation button 1), and the inner and outer needles 82 are released at intervals, that is, the inner needle 72 penetrates first. Then, the outer needle 82 pierces the lesion again, so that a certain tissue sample is obtained from the sampling groove of the inner needle 72 of the biopsy needle. Then, the biopsy needle is taken out, and the tissue sample is placed in a designated vessel to complete a puncture sampling operation.

The inverted structure can avoid the inertial displacement of the inner needle 72 and the outer needle 82 caused by their own high-speed motion, and can avoid the separation of the inner needle 72 and the inner needle 72 seat, so that the inner needle 72 and the outer needle 82 can be accurately matched in position, and the firing range can be stimulated. Accurate, it can accurately reach the location of the lesion according to the position set by the surgeon, and protect the personal safety of medical staff and patients.

The above-mentioned specific embodiments do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

A biopsy needle, comprising an inner needle (72), an inner needle hub (71) connected with the inner needle (72), an outer needle (82), and an outer needle hub (81) connected with the outer needle (82), It is characterized in that an inverted buckle structure is arranged between the inner needle (72) and the inner needle needle seat (71) and between the outer needle (82) and the outer needle needle seat (81);

The inner needle (72) and the inner needle needle seat (71), and between the outer needle (82) and the outer needle seat (81) are restricted by the undercut structure to create a direction along the axis of the inner needle (72) and the outer needle (82). relative movement.
The biopsy needle according to claim 1, characterized in that a raised undercut structure is provided on the outer wall of the inner needle (72), the undercut structure is located in the inner needle needle seat (71), and the inner needle needle seat (71) ) is provided with a chamber for accommodating the inverted buckle structure, or, the outer wall of the inner needle (72) is provided with a concave inverted buckle structure, and the inverted buckle structure is located in the inner needle needle seat (71), the inner needle needle seat (71) is provided with a stopper for inserting the inverted structure.
The biopsy needle according to claim 2, wherein the outer wall of the outer needle (82) is provided with a raised undercut structure, the undercut structure is located in the outer needle needle seat (81), and the outer needle needle seat (81) ) is provided with a chamber for accommodating the inverted structure.
The biopsy needle according to claim 3, characterized in that, the inner needle (72) and the inner needle needle seat (71) are of an integrated structure, and the outer needle (82) and the outer needle needle seat (81) are of an integrated structure.
The biopsy needle according to claim 2, characterized in that a raised undercut structure is provided on the outer wall of the inner needle (72), and the undercut structure includes at least one raised rib (722).
The biopsy needle according to claim 5, wherein the inverted structure comprises a plurality of raised ribs (722), and the plurality of raised ribs (722) are evenly arranged along the circumferential direction of the inner needle (72).
The biopsy needle according to claim 2, wherein a concave undercut structure is provided on the outer wall of the inner needle (72), and the undercut structure is a notch (723).
The biopsy needle according to claim 7, wherein the notch (723) has a set width along the axis direction of the inner needle (72), and the depth of the notch (723) is not less than the radius of the inner needle (72).
The biopsy needle according to claim 3, characterized in that the undercut structure comprises a truncated truncated sleeve (822), the first end of the sleeve (822) is connected with the tail end of the outer needle (82), and the first end of the sleeve (822) is connected with the tail end of the outer needle (82) The outer diameter of one end is the same as the outer diameter of the outer needle (82), and the outer diameter of the second end of the sleeve (822) is larger than the outer diameter of the first end;

The end of the outer needle seat (81) away from the needle tip of the outer needle (82) is provided with a groove for accommodating the sleeve, the cross-section of the groove is in the shape of a bell mouth, and the outer wall of the sleeve (822) is in contact with the side wall of the groove. catch.
A fully automatic biopsy needle, characterized by comprising the biopsy needle according to any one of claims 1 to 9.