CN105935307B

CN105935307B - Puncture core tip and puncture core and puncture device with same

Info

Publication number: CN105935307B
Application number: CN201610474575.6A
Authority: CN
Inventors: 孙宝峰; 马猛
Original assignee: Jiangsu Fengh Medical Equipment Co Ltd
Current assignee: Jiangsu Fengh Medical Equipment Co Ltd
Priority date: 2016-06-27
Filing date: 2016-06-27
Publication date: 2021-08-06
Anticipated expiration: 2036-06-27
Also published as: CN105935307A

Abstract

The invention discloses a puncture core tip, a puncture core with the same and a puncture outfit, and relates to the technical field of medical equipment; wherein, puncture core point includes: the tip body and a plurality of separation structures; the surface of the front part of the tip body is a puncture acting surface, the puncture acting surface is provided with a contour line, and the contour line comprises at least two straight line segments; along the puncture direction of the puncture core tip, the included angle between the at least two straight line sections and the central axis of the tip body is gradually increased; the plurality of separation structures are distributed on the puncture action surface, any separation structure has a unidirectional separation direction, and the separation directions of the separation structures are the same. The puncture core tip has higher strength and better safety, reduces the risk of damaging the internal tissues of a patient, and is beneficial to puncture. Meanwhile, the puncture core tip is provided with a plurality of one-way separation structures, and the strength of the puncture core tip is further improved.

Description

Puncture core tip and puncture core and puncture device with same

Technical Field

The invention relates to the field of medical equipment, in particular to a puncture core tip, a puncture core with the puncture core tip and a puncture outfit.

Background

In abdominal cavity examination, abdominal cavity operation and other minimally invasive or surgical operations, a puncture outfit is an indispensable surgical instrument. The puncture instrument can establish an access channel in the abdominal wall of the human body for the laparoscopic or other surgical instruments (e.g., endoscope, scissors, stapler, guide wire, catheter, filter, stent, etc.) to enter into the abdominal cavity and provide a passage for the gas to enter and exit from the abdominal cavity to control the pneumoperitoneum required for the operation to perform the examination or surgical operation. When a minimally invasive laparoscopic medical operation is started, a doctor generally firstly cuts a small incision on the abdomen of a patient, then the top point of a puncture end is aligned with the cut small incision to reciprocate and move downwards, and the puncture cannula penetrates through the cortex of the abdomen of the patient by the puncture outfit.

As shown in FIG. 1, the front portion a of the tip of the prior art piercing core is of a tapered configuration, thus facilitating, though to some extent, the opening of the incision in the abdomen of the patient. However, the tip of the puncture core with the conical structure is relatively sharp, which is beneficial to puncture, but has poor strength, and when the tip of the puncture core enters the abdomen of the patient, the tip of the puncture core with the conical structure risks damaging the internal tissues of the patient.

Meanwhile, the existing separation structure of the puncture core tip is designed in a symmetrical mode and has a bidirectional separation cutting direction. Therefore, the cutting efficiency is lower, and the wound of the patient can be damaged in the reciprocating direction, so that unnecessary damage is brought to the patient.

Therefore, it is necessary to provide a further solution to the above problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a puncture core tip, a puncture core with the puncture core tip and a puncture outfit, so as to overcome the defects in the prior art.

To achieve the above object, the present invention provides a puncture core tip comprising: the tip body and a plurality of separation structures;

the surface of the front part of the tip body is a puncture acting surface, the puncture acting surface is provided with a contour line, the contour line comprises at least two straight line segments, and an included angle between the straight line segments and the central axis of the tip body is gradually increased along the puncture direction of the tip of the puncture core; the plurality of separation structures are distributed on the puncture action surface, any separation structure has a unidirectional separation direction, and the separation directions of the separation structures are the same.

As the improvement of the puncture core tip, the contour line rotates 360 degrees by taking the central axis of the tip body as a rotating shaft to form the puncture acting surface.

As an improvement of the puncture core tip, the puncture action surface formed by the rotation of each straight line segment is formed by intersecting a corresponding number of planes.

As an improvement of the piercing core tip of the present invention, the contour line further comprises a curved segment.

As an improvement of the puncture core tip, the curve segment is positioned at one end of the contour line; or the curve segments are respectively positioned at the end parts of the contour lines, and the at least two straight line segments are positioned between the two curve segments; or the straight line section and the curve section are arranged at intervals.

As an improvement to the piercing core tip of the present invention, the straight section intersects the curved section.

As an improvement of the piercing core tip of the present invention, the curved section is a convex and/or concave curve.

As an improvement of the puncture core tip of the present invention, any one of the separation structures includes a separation body having at least two faces, which are a first face and a second face, the first face intersecting with the puncture action face; the first face and the second face intersect and the intersection line forms a cutting edge, or at least one face is arranged between the first face and the second face, and the at least one face and the second face intersect and the intersection line forms a cutting edge; the second face forms a transition surface between the cutting edge and the piercing action surface.

As an improvement of the puncture core tip, the first surface is a plane or a curved surface intersecting with the puncture action surface, and the second surface is a plane or a curved surface tangent with the puncture action surface.

As an improvement of the puncture core tip, the rear part of the tip body is provided with a mounting structure which is a hollow structure or a solid structure.

To achieve the above object, the present invention also provides a piercing core having a piercing core tip as described above.

In order to achieve the above object, the present invention further provides a puncture instrument having the puncture core as described above.

Compared with the prior art, the invention has the beneficial effects that: the puncture core tip has higher strength and better safety, reduces the risk of damaging the internal tissues of a patient, and is beneficial to puncture. Meanwhile, the puncture core tip provided by the invention is provided with a plurality of one-way separation structures, so that the damage to a patient is reduced, and the strength of the puncture core tip is further improved.

Drawings

FIG. 1 is a schematic plan view of a prior art piercing core tip;

FIG. 2 is a schematic plan view of one embodiment of the piercing core tip of the present invention, wherein the direction indicated by arrow B is the piercing direction;

FIG. 3 is an enlarged front view of the tip body of FIG. 2;

FIG. 4 is a sectional view taken along the line A-A in FIG. 2, in which the number of the separation structures is three;

FIG. 5 is a schematic plan view of one embodiment of a piercing core of the present invention;

FIG. 6 is a schematic plan view of one embodiment of a piercing core of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.

2 in describing the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "reciprocating," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing and simplifying the invention, 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 thus should not be considered as limiting the invention.

3 furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

4 the embodiments described below with reference to the drawings are illustrative and are intended to be illustrative of the invention and should not be construed as limiting the invention. The following describes each embodiment of the present invention in detail with reference to specific embodiments. In the following, the terms "front", "rear", "leading" and "trailing" refer to the puncturing direction of the puncture device, i.e., the puncturing direction is from the rear to the front and from the trailing to the leading. The direction indicated by the arrow B is the puncture direction.

5 As shown in FIG. 2, the piercing core tip 1 of the present invention comprises: a tip body 10 and a number of separation structures 20.

6 wherein, the anterior surface of pointed end body 10 is puncture acting surface 110, puncture acting surface 110 has corresponding contour line 111, contour line 111 includes two at least straightways, so, forms bead structure 112 between the part puncture acting surface that adjacent straightway corresponds, and this bead structure 112 can play the effect of strengthening rib to be favorable to improving the intensity of pointed end body 10. In addition, adopt above-mentioned design, can also overcome the relative sharp-pointed problem of puncture core point of current toper structure, reduced the risk of puncture in-process injury patient's internal tissue.

7 as shown in fig. 3, further, in the piercing direction of the piercing core tip 1, the included angle α between each straight line segment and the central axis L1 of the tip body gradually increases, so that one end of the straight line segment gradually approaches to the central axis L1 of the tip body, thereby forming the foremost end C of the piercing core tip 1.

8 the puncture acting surface 110 is a revolution surface, and for realizing the purpose, the contour line uses the central axis of the tip body as a rotating shaft, and rotates for 360 degrees to form the puncture acting surface 110. At this time, the whole puncture action surface formed by the rotation of each straight line segment is formed by intersecting and combining a corresponding number of truncated conical surfaces, and the intersecting line between the adjacent truncated conical surfaces forms the rib structure 112. Note that, in fig. 2, only the case where the straight line segment is three is shown, and the case where the straight line segment is two and more than three is not shown.

In other embodiments, the contour line further comprises a curved line segment. The relationship between the curve segment and the straight line segment is as follows: the curve segment is located at one end of the contour line, wherein the curve segment can be located at the front end of the contour line and also can be located at the rear end of the contour line. Or the curve segments are respectively positioned at the end parts of the contour lines, wherein the curve segments are respectively positioned at the front ends and the rear ends of the contour lines, and the at least two straight line segments are positioned between the two curve segments. Or the straight line section and the curve section are arranged at intervals, wherein the straight line section can be separated by one curve section, and can also be separated by more than two curve sections. Similarly, the curved line segment may be separated by one straight line segment, or may be separated by more than two straight line segments.

In the above embodiment, the straight line segment intersects the curved line segment, so that the portions of the puncture action surfaces corresponding to the straight line segment and the curved line segment intersect with each other, and thus, the intersection line of the straight line segment and the curved line segment forms the rib structure. In addition, according to the requirement, the curve section can be a convex curve, a concave curve or a combination of the convex curve and the concave curve.

The rear part of the tip body 10 is provided with a mounting structure 12, namely, the puncture core tip 1 of the invention is fixedly connected with the puncture core rod through the mounting structure 12. In particular, the mounting structure 12 may be sleeved or inserted on the end of the piercing mandrel.

In one embodiment, when the mounting structure 12 is connected to the end of the piercing mandrel in a sleeving manner, the mounting structure 12 is a hollow structure, the hollow mounting structure 12 has a mounting opening 120, and the hollow mounting structure 12 is sleeved on the piercing mandrel through the mounting opening 120.

Specifically, a mounting space is formed inside the hollow mounting structure 12, and the end of the piercing core rod is accommodated in the mounting space, so that the mounting and fixing of the piercing core rod and the piercing core rod are realized. In addition, the end of the mounting structure 12 having the mounting opening 120 has a continuously disposed bevel 121, and the bevel 121 can serve as a guide during the puncturing process. The guiding function is that when the inclined plane 121 contacts with the skin at the abdominal incision along the penetration core rod, the skin at the abdominal incision is transited to the penetration core rod along the inclined plane 121 along with the penetration of the tip body 10.

In the above embodiment, when the mounting structure 12 is a hollow structure, in order to further reduce the weight of the tip body 10, the front portion of the tip body 10 may be a hollow structure, and in this case, the mounting structure 12 is in communication with the front portion of the tip body 10 and is integrally formed with the same.

In another embodiment, the mounting structure 12 is a solid structure, and the mounting structure 12 is inserted into the end of the piercing mandrel. Specifically, an installation space is formed inside the puncture core bar, and the installation structure 12 is entirely accommodated in the installation space of the puncture core bar, so that the installation and fixation of the two are realized. Accordingly, at this time, the front portion of the tip body 10 may also be provided as a solid structure, and preferably, the mounting structure 12 is integrally formed with the front portion of the tip body 10. In addition, when fixedly connected by means of a plug-in connection, the mounting structure 12 and the front portion of the tip body 10 may also adopt a hollow structure as described above, as needed.

The separation structure 20 is used to separate an incision of a human body during a puncturing procedure, so as to facilitate the puncturing procedure. Specifically, the number of the separation structures 20 is several, and several separation structures 20 are distributed on the acting surface 110. Preferably, a plurality of separation structures 20 are equally spaced and uniformly distributed on the puncture action surface 110 of the front portion of the tip body 10.

"a plurality of separation structures 20 are distributed on the acting piercing surface 110" means: the separation structure 20 is integrally formed with the puncture action surface 110, or the separation structure 20 is attached to the puncture action surface 110 by bonding, welding, fixing by a connector, or the like. Note that fig. 4 only shows the case of "integral molding", and the case of attachment is not shown.

Any of the separating structures 20 has a unidirectional separating direction, and the separating directions of the separating structures 20 are the same. So set up, when carrying out the puncture, only when rotatory according to unidirectional separation direction, just carry out notched cutting, when rotatory according to the opposite direction, can not carry out the secondary cutting to avoid bringing unnecessary damage to the patient.

As shown in fig. 4, in particular, any one of the separation structures 20 comprises a separation body 21, the separation body 21 having at least two faces, a first face 211 and a second face 212. Wherein the first face 211 intersects the lancing action face 110, and at the same time, the first face 211 intersects the second face 212 and the intersection line forms a cutting edge 210; the second face 212 forms a transition surface between the cutting edge 210 and the lancing action surface. Alternatively, when there is at least one surface between the first surface 211 and the second surface 212, the at least one surface intersects the second surface 212 and the intersecting line forms a cutting edge. Fig. 4 only shows that the separation body 21 has two faces, and does not show that at least one face is provided between the first face 211 and the second face 212.

When the separation body 21 is rotated in the unidirectional separation direction during puncturing, the cutting edge 210 comes into contact with the incision of the abdomen of the human body, and the incision is cut; when the puncture outfit is rotated according to the opposite direction of the separation direction, the transition surface plays a guiding role at the moment, namely in the puncture process, when the puncture outfit is rotated, the abdominal cortex of a patient slides across the cutting edge 210 along the transition surface, and the purposes of avoiding the cutting edge 210 from cutting and separating the abdominal cortex are achieved. In addition, since the separation body 21 has the transition surface, it itself can function as a reinforcing rib, thereby improving the strength of the puncture core tip.

In one embodiment, the first surface 211 may be a curved surface or a flat surface intersecting the puncture action surface 110. When the first surface 211 is a curved surface intersecting with the puncture action surface 110, the curved surface is a convex or concave curved surface; when the first surface 211 is a plane intersecting the puncturing action surface 110, the angle between the plane and the puncturing action surface 110 may be an acute angle, a right angle, or an obtuse angle. The second surface 212 is a curved surface or a flat surface tangent to the acting surface 110, and preferably, the curved surface is an arc-shaped surface or a convex smooth curved surface.

Further, the number of the plurality of separation structures 20 is equal to or greater than three, and preferably, the number of the separation structures 20 is three. At this time, the angle between the separation structures 20 is 120 °. Therefore, when the doctor performs the puncture operation, the angle of the puncture outfit can correspond to the angle of the puncture outfit which is rotated for one time, namely, the puncture outfit is rotated for 90 to 120 degrees for one time, thereby meeting the operation habit of operators and being beneficial to forming smoother incisions.

As shown in FIG. 5, the present invention also provides a puncture tip 2 having the puncture tip 1 as described above, based on the puncture tip 1 as described above.

Specifically, the puncture core 2 comprises a puncture core rod 220 and a puncture core tip 1, wherein the puncture core rod 220 and the puncture core tip 1 are arranged in a split manner, and specifically, the puncture core tip 1 is mounted at the end of the puncture core rod 220. As described above, the piercing core tip 1 can be fixedly connected to the end of the piercing core rod 220 by means of a sleeve or a plug.

In this embodiment, the piercing core pin 220 has a diameter different from the diameter of the mounting structure at the rear of the tip body 10. When the two are fixedly connected in a sleeving manner, the diameter of the mounting structure at the rear part of the tip body 10 is larger than that of the puncture core rod 220; when the two are fixedly connected in a plugging manner, the diameter of the mounting structure at the rear part of the tip body 10 is smaller than that of the puncture core rod 220.

In another embodiment of the lancet 3, as shown in fig. 6, the lancet 3 has a lancet tip 1 as described above.

Specifically, the puncture core 3 includes a puncture core rod 320 and a puncture core tip 1, wherein the puncture core rod 320 and the puncture core tip 1 are integrally formed, and the integrally forming manner may be injection molding or the like. Preferably, the piercing mandrel 320 has a diameter equal to the diameter of the mounting structure on the rear of the tip body 10.

The present invention also provides a puncture instrument having the above-described

puncture cores

2 and 3, based on the above-described

puncture cores

2 and 3.

In conclusion, the puncture core tip has higher strength and better safety, reduces the risk of damaging the internal tissues of a patient, and is beneficial to puncture. Meanwhile, the puncture core tip provided by the invention is provided with a plurality of one-way separation structures, so that the damage to a patient is reduced, and the strength of the puncture core tip is further improved.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A piercing core tip, comprising: the tip body and a plurality of separation structures;

the surface of the front part of the tip body is a puncture acting surface, and the puncture acting surface is provided with a contour line; the contour line comprises at least two straight line segments, and a convex rib structure is formed between the puncture action surfaces of the parts corresponding to the adjacent straight line segments; or the contour line comprises a curved line section and at least two straight line sections, and a convex rib structure is formed between the straight line sections and the adjacent straight line sections or the parts of the puncture action surfaces corresponding to the curved line sections; along the puncture direction of the puncture core tip, the included angles between the at least two straight line sections and the central axis of the tip body are gradually increased, and the included angles are acute angles; the plurality of separation structures are distributed on the puncture action surface, any separation structure has a unidirectional separation direction, and the separation directions of the separation structures are the same.

2. The puncture core tip according to claim 1, wherein the contour line is rotated 360 ° about the central axis of the tip body to form the puncture action surface.

3. The puncture core tip according to claim 2, wherein the puncture action surface is formed by intersecting a corresponding number of truncated conical surfaces formed by rotating each straight line segment by 360 ° about the central axis of the tip body as the rotation axis.

4. The puncture core tip according to claim 1, wherein the curved segment is located at one end of the contour line; or one curve segment is positioned at the front end of the contour line, one curve segment is positioned at the rear end of the contour line, and the at least two straight line segments are positioned between the two curve segments; or the straight line section and the curve section are arranged at intervals.

5. The puncture core tip according to claim 4, wherein the straight line segment intersects a curved line segment.

6. The puncture core tip according to claim 1, wherein the curved section is a convex and/or concave curve.

7. The piercing core tip of claim 1, wherein any one of the separation structures comprises a separation body having at least two faces, a first face and a second face, the first face intersecting the piercing action face; the first face and the second face intersect and the intersection line forms a cutting edge, or at least one face is arranged between the first face and the second face, and the at least one face and the second face intersect and the intersection line forms a cutting edge; the second face forms a transition surface between the cutting edge and the piercing action surface.

8. The puncture core tip according to claim 7, wherein the first face is a plane or a curved face intersecting the puncture action face, and the second face is a plane or a curved face tangential to the puncture action face.

9. The puncture core tip according to claim 1, wherein the rear portion of the tip body is a mounting structure, the mounting structure being a hollow structure or a solid structure.

10. A puncture core, characterized in that the puncture core has a puncture core tip according to any one of claims 1 to 9.

11. A puncture instrument having the puncture core according to claim 10.