阅读说明：本技术 经皮穿刺术的穿刺针与手术组件 (Puncture needle and operation assembly for percutaneous puncture ) 是由 严航 刘洛斌 郑忠伟 梅志华 于 2020-05-15 设计创作，主要内容包括：本发明提供了一种经皮穿刺术的穿刺针与手术组件,包括：内针芯、外针管、内针座与外针座；所述内针芯的针尖与所述外针管的针尖呈角度相匹配的斜面,所述外针管与所述外针座固定连接,所述内针芯与所述内针座固定连接,所述内针芯穿设于所述外针管,所述内针座沿所述内针芯与所述外针管的长度方向位于所述外针座的远离针尖的一侧；所述内针座设有第一周向锁定部,所述外针座设有第二周向锁定部；所述内针座与所述外针座装配后,所述第一周向锁定部对接所述第二周向锁定部,所述外针管相对于所述内针芯的周向旋转位置被固定,且所述内针芯针尖的斜面与所述外针管针尖的斜面持平。(The invention provides a puncture needle and operation assembly for percutaneous puncture, comprising: the needle comprises an inner needle core, an outer needle tube, an inner needle base and an outer needle base; the needle point of the inner needle core and the needle point of the outer needle tube form an inclined plane with a matched angle, the outer needle tube is fixedly connected with the outer needle seat, the inner needle core is fixedly connected with the inner needle seat, the inner needle core penetrates through the outer needle tube, and the inner needle seat is positioned on one side, far away from the needle point, of the outer needle seat along the length direction of the inner needle core and the outer needle tube; the inner needle base is provided with a first circumferential locking part, and the outer needle base is provided with a second circumferential locking part; after the inner needle seat and the outer needle seat are assembled, the first circumferential locking part is butted with the second circumferential locking part, the circumferential rotating position of the outer needle tube relative to the inner needle core is fixed, and the inclined plane of the needle point of the inner needle core is flush with the inclined plane of the needle point of the outer needle tube.)

1. A percutaneous puncture needle, comprising: the needle comprises an inner needle core, an outer needle tube, an inner needle base and an outer needle base; the needle point of the inner needle core and the needle point of the outer needle tube form an inclined plane with a matched angle, the outer needle tube is fixedly connected with the outer needle seat, the inner needle core is fixedly connected with the inner needle seat, the inner needle core penetrates through the outer needle tube, and the inner needle seat is positioned on one side, far away from the needle point, of the outer needle seat along the length direction of the inner needle core and the outer needle tube; the inner needle base is provided with a first circumferential locking part, and the outer needle base is provided with a second circumferential locking part;

after the inner needle seat and the outer needle seat are assembled, the first circumferential locking part is butted with the second circumferential locking part, the circumferential rotating position of the outer needle tube relative to the inner needle core is fixed, and the inclined plane of the needle point of the inner needle core is flush with the inclined plane of the needle point of the outer needle tube.

2. A percutaneous puncture needle according to claim 1, wherein the first circumferential lock portion includes a projection provided on one side of the inner hub in the axial direction of the inner core, and the second circumferential lock portion includes a groove;

after the inner needle seat and the outer needle seat are assembled, the bulge is embedded into the groove.

3. The percutaneous puncture needle according to claim 2, wherein the outer surface of the inner needle holder is provided with claws, and the outer surface of the outer needle holder is provided with a boss;

the inner needle base with outer needle base assembly back, the jack catch joint in keeping away from of boss one side surface of inner needle base is used for the restriction outer needle base is kept away from inner needle base motion.

4. A percutaneous puncture needle according to claim 3, further comprising: the quantity of jack catch is two sets ofly, and two sets of jack catch symmetric distribution in the both sides of interior needle file.

5. A percutaneous puncture needle according to any one of claims 2 to 4, wherein if the number of the projections is at least two, the at least two projections are not symmetrically arranged with respect to the axial center of the inner core.

6. The percutaneous puncture needle according to any one of claims 1 to 4, wherein the inner hub comprises a hub body and an annular outer wall fixedly provided on an outer side of the hub body, a hub passage for connecting the inner hub is provided in the hub body, an inner diameter of the hub passage is matched with that of the inner hub, the first circumferential locking portion is provided on the annular outer wall, and an outer profile of a cross section of the annular outer wall is rectangular.

7. The percutaneous puncture needle according to claim 6, wherein the inner hub further comprises a bypass tube and an instrument tube, an instrument channel is provided in the instrument tube, the instrument tube is connected to the hub body, a water injection channel is provided in the bypass tube, the water injection channel is communicated to the instrument channel, the instrument channel is communicated to the hub channel, the inner hub has a lumen extending through both ends, and the lumen of the inner hub can be communicated with the instrument channel.

8. The percutaneous puncture needle according to claim 6, wherein an extension part is arranged on one side of the outer needle base facing the inner needle base, and a limiting part is arranged outside the extension part;

after the inner needle seat and the outer needle seat are assembled, the extension part can be partially embedded into the space between the needle core seat body and the annular outer wall, and the limiting part is clamped on the end face, facing towards the annular outer wall, of one end of the outer needle seat and used for limiting the movement of the outer needle seat towards the inner needle seat.

9. A percutaneous puncture needle according to any one of claims 1 to 4, wherein the outer surface of the outer needle tube and/or the inner core is provided with a visualization structure;

the developing structure includes at least one of:

sand blasting and polishing structure, ring groove structure, spiral groove structure, pit structure.

10. A percutaneous puncture surgical assembly comprising the percutaneous puncture needle of any one of claims 1 to 9.

Technical Field

The invention relates to the field of medical instruments, in particular to a puncture needle and an operation assembly for percutaneous puncture.

Background

Surgical interventions generally require first a puncture procedure, in the case of percutaneous nephrolithotripsy, also characterized as PCNL, which is a modern minimally invasive surgical technique for lithotripsy and lithotripsy in vivo, with a nephroscope passing through the percutaneous renal passage (a passage that passes percutaneously into the calyx of the renal pelvis).

As shown in fig. 1, the puncture needle used in the conventional PCNL procedure has a canula structure and is divided into an inner core 1 and an outer tube 2. The head end of the inner needle core 1 is a needle point 11 with an inclined surface to form a puncture point; as shown in figure 1, in the puncture needle, the head end of the outer needle tube 2 can be flat, the step surface 22 can form larger resistance after the needle point 11 of the inclined plane is punctured, if the operator increases the pushing force when encountering the resistance, the pushing force is not controlled properly, and the step surface is easy to break through tissues and then the force is suddenly released to puncture too deeply.

Disclosure of Invention

The invention provides a puncture needle and a surgical assembly for percutaneous puncture, which aim to reduce puncture resistance and solve the problem of easy over-deep puncture.

According to a first aspect of the present invention, there is provided a percutaneous puncture needle comprising: the needle comprises an inner needle core, an outer needle tube, an inner needle base and an outer needle base; the needle point of the inner needle core and the needle point of the outer needle tube form an inclined plane with a matched angle, the outer needle tube is fixedly connected with the outer needle seat, the inner needle core is fixedly connected with the inner needle seat, the inner needle core penetrates through the outer needle tube, and the inner needle seat is positioned on one side, far away from the needle point, of the outer needle seat along the length direction of the inner needle core and the outer needle tube; the inner needle base is provided with a first circumferential locking part, and the outer needle base is provided with a second circumferential locking part;

after the inner needle seat and the outer needle seat are assembled, the first circumferential locking part is butted with the second circumferential locking part, the circumferential rotating position of the outer needle tube relative to the inner needle core is fixed, and the inclined plane of the needle point of the inner needle core is flush with the inclined plane of the needle point of the outer needle tube.

Optionally, the first circumferential locking portion includes a protrusion provided on one side of the inner needle holder in the axial direction of the inner needle core, and the second circumferential locking portion includes a groove;

after the inner needle seat and the outer needle seat are assembled, the bulge is embedded into the groove.

Optionally, the outer surface of the inner needle base is provided with a clamping jaw, and the outer surface of the outer needle base is provided with a boss;

the inner needle base with outer needle base assembly back, the jack catch joint in keeping away from of boss one side surface of inner needle base is used for the restriction outer needle base is kept away from inner needle base motion.

Optionally, the number of the clamping jaws is two, and the two groups of clamping jaws are symmetrically distributed on two sides of the inner needle base.

Optionally, if the number of the protrusions is at least two, the at least two protrusions are not symmetrically distributed about the axial center of the inner stylet.

Optionally, the inner needle base includes a stylet base body and an annular outer wall fixedly disposed on the outer side of the stylet base body, a stylet channel for connecting the inner stylet is disposed in the stylet base body, the inner diameter of the stylet channel is matched with the inner stylet, the first circumferential locking portion is disposed on the annular outer wall, and the outer contour of the cross section of the annular outer wall is rectangular.

Optionally, the inner needle holder further includes a bypass tube and an instrument tube, the instrument tube is provided with an instrument channel, the instrument tube is connected to the needle core holder, the bypass tube is provided with a water injection channel, the water injection channel is communicated to the instrument channel, the instrument channel is communicated to the needle core channel, the inner needle core is provided with an inner cavity penetrating through two ends, and the inner cavity of the inner needle core can be communicated with the instrument channel.

Optionally, an extension part is arranged on one side of the outer needle base facing the inner needle base, and a limiting part is arranged on the outer side of the extension part;

after the inner needle seat and the outer needle seat are assembled, the extending part can be partially embedded into the space between the needle core seat body and the annular outer wall, and the limiting part is clamped on the end face, facing towards one end of the outer needle seat, of the annular outer wall and used for limiting the outer needle seat to move towards the inner needle seat.

Optionally, the outer surface of the outer needle tube and/or the inner needle core is provided with a developing structure.

Optionally, the developing structure comprises at least one of:

sand blasting and polishing structure, ring groove structure, spiral groove structure, pit structure.

According to a second aspect of the present invention there is provided a percutaneous puncture surgical assembly comprising a percutaneous puncture needle of the first aspect and its alternatives.

In the puncture needle and the operation assembly for percutaneous puncture provided by the invention, the inclined plane of the needle point of the inner needle core and the inclined plane of the needle point of the outer needle tube are designed to be in a flush state, so that the step resistance caused by the existence of the flat needle tube after the inclined plane of the needle point penetrates into tissues can be eliminated, and the problem of over-deep penetration caused by the step resistance is avoided.

Furthermore, the fixing of the circumferential position between the inner needle base and the outer needle base can be realized through the first circumferential locking part and the second circumferential locking part, and further, the circumferential position between the inner needle core and the outer needle tube can be locked, and meanwhile, the locked circumferential position is configured in such a way that the inclined plane of the needle point of the inner needle core can be flush with the inclined plane of the needle point of the outer needle tube.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the tip region of a prior art lancet;

FIG. 2a is a schematic view of the tip region of the needle with the tip held flat in accordance with one embodiment of the present invention;

FIG. 2b is a schematic view of the tip region of the needle with the tip misaligned in accordance with an embodiment of the present invention;

FIG. 3 is a schematic view of the configuration of a percutaneous puncture needle in accordance with an embodiment of the invention;

FIG. 4 is a schematic illustration of an unassembled percutaneous puncture needle in accordance with an embodiment of the invention;

FIG. 5 is a first assembled configuration of a percutaneous puncture needle in accordance with an embodiment of the present invention;

FIG. 6 is a second assembled configuration of a percutaneous puncture needle in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of a percutaneous puncture needle in misalignment according to an embodiment of the invention;

FIG. 8 is a schematic cross-sectional view of an inner hub according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of a percutaneous puncture needle in accordance with an embodiment of the invention;

FIG. 10 is a partial structural view of an outer needle cannula employing a sand blasting structure as a development structure in accordance with an embodiment of the present invention;

FIG. 11 is a partial structural view of an outer needle cannula employing a ring groove structure as a developer structure in accordance with an embodiment of the present invention;

FIG. 12 is a schematic view showing a partial structure of an outer needle cannula according to an embodiment of the present invention, in which a spiral groove structure is adopted as a developing structure;

FIG. 13 is a partial structural view of an outer needle cannula employing a dimple arrangement as a developer structure in accordance with an embodiment of the present invention.

Description of reference numerals:

1-inner needle core;

11-a needle tip;

2-outer needle tube;

21-needle point;

22-step surface;

23-a development structure;

3-outer needle seat;

31-a second circumferential locking portion;

32-boss;

33-a corrugated structure;

34-an extension;

35-a limiting part;

36-threads;

4-inner needle seat;

41-a first circumferential locking portion;

42-jaw;

43-an annular outer wall;

44-a needle core seat body;

45-an instrument tube;

46-a bypass tube body;

47-a stylet channel;

48-instrument channel;

49-Water injection channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.