3D purse-string nail

Abstract

The invention relates to the field of medical instruments, and aims at providing a 3D pouch nail, a body of the 3D pouch nail is a pouch nail, the pouch nail comprises a nail body and two nail legs, the two nail legs are connected to the left end and the right end of the nail body respectively, the nail legs incline towards the front side direction or the rear side direction of the nail body, and the inclination directions of the nail legs on the left side and the right side are opposite. The situation that the tail ends of nail legs of a traditional pouch nail extrude one another is avoided, and the fixing quality of a suture line can be improved.

Description

Technical Field

[0001] The invention relates to the field of medical devices, in particular to a 3D purse-string nail. Background Art

[0002] A purse-string staple is a medical device used in conjunction with a purse-string anastomosis device.

[0003] Purse-string staples can be cut through the laparoscope to anastomose the purse-string device, and the sutures are fixed to the tissues by purse-string staples instead of traditional manual sutures. However, the traditional purse-string staples have some defects in the process of staple formation. Specifically, in the process of purse-string staple formation, such as Figure 6 As shown, there is a probability that the ends of the two parallel nail legs will be squeezed against each other, resulting in poor nail quality and unsatisfactory effect of fixing the suture line. Summary of the invention

[0004] The object of the present invention is to provide a 3D purse-string nail, which avoids the situation in which the ends of the legs of a traditional purse-string nail are squeezed against each other and can improve the fixation quality of the suture.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A 3D purse nail, whose main body is a purse nail, comprises a nail body and two nail legs, the two nail legs are respectively connected to the left and right ends of the nail body, the nail legs are inclined toward the front or rear direction of the nail body, and the inclination directions of the left and right nail legs are opposite.

[0007] Compared with the prior art, the advantages of the present invention are: by means of the nail legs that are tilted in the opposite direction relative to the nail body and the arc segments A and C that are twisted in the opposite direction, the ends of the two nail legs can be offset from each other and closed to form a nail during the nailing process of the purse nail, thereby avoiding the situation in which the ends of the traditional purse nail are easily squeezed against each other during nailing, thereby improving the stability of the nailing and the fixation quality of the suture line, and achieving a more secure suturing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a top view of the structure of a 3D purse-string nail embodiment of the present invention;

[0009] Figure 2 It is a structural schematic diagram of a 3D purse-string nail embodiment of the present invention;

[0010] Figure 3 It is a structural front view of a 3D purse-string nail embodiment of the present invention;

[0011] Figure 4 It is a structural front view of a 3D purse-string nail embodiment of the present invention;

[0012] Figure 5This is a schematic diagram of the nailing effect of a 3D purse-string nail embodiment of the present invention;

[0013] Figure 6 This is a schematic diagram of the effect of nailing a traditional purse.

[0014] Explanation of reference numerals: 1 nail body, 101 arc segment A, 102 arc segment B, 103 arc segment C, 2 nail leg, 3 traditional purse nail leg. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0016] like Figure 1-5 As shown, it is a schematic diagram of an embodiment of a 3D purse-string nail provided by the present invention:

[0017] A 3D purse nail, whose main body is a purse nail, comprises a nail body 1 and two nail legs 2, the two nail legs 2 are respectively connected to the left and right ends of the nail body 1, the nail legs 2 are inclined toward the front or rear direction of the nail body 1, and the inclination directions of the left and right nail legs 2 are opposite.

[0018] The nail body 1 has a wave-shaped profile, and includes a circular arc segment A 101, a circular arc segment B 102, and a circular arc segment C 103 which are connected in sequence;

[0019] The openings of the arc segment A 101 and the arc segment C 103 are oriented opposite to the opening of the arc segment B 102, and the arc segment A 101 and the arc segment C 103 are twisted in opposite directions respectively, and drive the nail leg 2 to tilt in the opposite direction.

[0020] The radius R1 of the outer arc of the arc segment A 101 and the arc segment C 103 is 0.3 mm to 1 mm, and the radius R2 of the inner arc of the arc segment B 102 is 0.5 mm to 2.5 mm.

[0021] As the most preferred embodiment, the radius R1 of the outer arc of the arc segment A 101 and the arc segment C 103 is 0.6 mm, and the radius R2 of the inner arc of the arc segment B 102 is 0.9 mm.

[0022] The overall width d of the purse string nail is 2.6 mm to 3.5 mm, and the overall height h of the purse string nail is 2 mm to 5 mm.

[0023] As the most preferred embodiment, the overall width d of the purse string nail is 2.9 mm, and the overall height h of the purse string nail is 2.5 mm.

[0024] The left and right nail legs 2 are relatively inclined inward, and the inner contour lines of the left and right nail legs 2 on the projection surface in the front-back direction extend to form an angle α1, and the angle α1 is 10° to 50°.

[0025] Most preferably, the angle α1 is 18°.

[0026] The cross section of the nail leg 2 perpendicular to its central axis is circular, the diameter φ of the circle is 0.18 mm to 0.35 mm, and the nail body 1 and the nail leg 2 are integrally formed with equal cross sections.

[0027] Most preferably, the diameter φ of the circle is 0.2 mm.

[0028] Furthermore, the nail body 1 and the nail body 2 should be made of TA2G (titanium metal) material.

[0029] The ends of the nail legs 2 are provided with beveled surfaces, and the beveled surfaces of the two nail legs 2 are arranged back to back (specifically, the beveled surfaces of the two nail legs 2 are arranged back to back, that is, the end point of the left nail leg 2 is located at the rightmost side of the left nail leg, and the end point of the right nail leg 2 is located at the leftmost side of the right nail leg 2, and the distance between the end points of the two nail legs 2 is the shortest distance between the two nail legs 2).

[0030] Furthermore, the maximum distance d2 between the oblique cut surfaces of the two nail legs 2 on the projection surface in the front-to-back direction is 2 mm to 3 mm.

[0031] Most preferably, the distance d2 is 2.4 mm.

[0032] The oblique cut surface of the nail leg 2 and the inner contour line of the nail leg 2 on the projection surface in the front-back direction form an angle α2, and the angle α2 is 25° to 50°.

[0033] Most preferably, the angle α2 is 33°.

[0034] The distance d1 between the tip of the chamfered surface of the nail leg 2 and the longitudinal section passing through the central axis of the nail body 1 is 0.05mm to 0.5mm (the distance d1 specifically refers to the vertical distance from the tip of the chamfered surface of the nail leg 2 to the longitudinal section passing through the central axis of the nail body 1).

[0035] Furthermore, the distance d1 may be 0.08 mm, 0.15 mm, 0.3 mm, and 0.5 mm. Most preferably, the distance d1 is 0.08 mm.

[0036] The central axes of the two nail legs 2 form a torsion angle α3 on the projection surface in the left-right direction, and the torsion angle α3 is 4° to 28°.

[0037] Most preferably, the torsion angle α3 is 4.2°.

[0038] The usage of 3D purse string staples can be found in the prior patent document: A laparoscopic cutting and anastomosis purse string stapler anastomosis mechanism (CN 116421245 A).

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. For example, the purse-string nail can be scaled up or down in the same proportion based on its most preferred size. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention.

Claims

1. A 3D purse nail, the main body of which is a purse nail, the purse nail comprising a nail body (1) and two nail legs (2), the two nail legs (2) being respectively connected to the left and right ends of the nail body (1), characterized in that: The nail legs (2) are inclined toward the front or rear direction of the nail body (1), and the inclination directions of the left and right nail legs (2) are opposite.

2. The 3D purse-string nail according to claim 1, characterized in that: The nail body (1) has a wave-shaped profile, and comprises a circular arc segment A (101), a circular arc segment B (102), and a circular arc segment C (103) which are connected in sequence; The openings of the arc segment A (101) and the arc segment C (103) are oriented in opposite directions to the opening of the arc segment B (102), and the arc segment A (101) and the arc segment C (103) are twisted in opposite directions respectively, driving the nail legs (2) to tilt in opposite directions.

3. The 3D purse-string nail according to claim 2, characterized in that: The radius R1 of the outer arc of the arc segment A (101) and the arc segment C (103) is 0.3 mm to 1 mm, and the radius R2 of the inner arc of the arc segment B (102) is 0.5 mm to 2.5 mm.

4. The 3D purse-string nail according to claim 1, characterized in that: The overall width d of the purse string nail is 2.6 mm to 3.5 mm, and the overall height h of the purse string nail is 2 mm to 5 mm.

5. The 3D purse-string nail according to claim 1, characterized in that: The left and right nail legs (2) are relatively inclined inwards, and the inner contour lines of the left and right nail legs (2) on the projection surface in the front-back direction extend to form an angle α1, and the angle α1 is 10° to 50°.

6. The 3D purse-string nail according to claim 1, characterized in that: The cross section of the nail leg (2) perpendicular to its central axis is circular, the diameter φ of the circle is 0.18 mm to 0.35 mm, and the nail body (1) and the nail leg (2) are integrally formed with equal cross sections.

7. The 3D purse-string nail according to claim 1, characterized in that: The ends of the nail legs (2) are provided with chamfered surfaces, and the chamfered surfaces of the two nail legs (2) are arranged back to back.

8. The 3D purse-string nail according to claim 7, characterized in that: The oblique cut surface of the nail leg (2) and the inner contour line of the nail leg (2) on the projection surface in the front-back direction form an angle α2, and the angle α2 is 25° to 50°.

9. The 3D purse-string nail according to claim 7, characterized in that: The distance d1 between the tip of the oblique section of the nail leg (2) and the longitudinal section passing through the central axis of the nail body (1) is 0.05 mm to 0.5 mm.

10. The 3D purse-string nail according to any one of claims 1 to 9, characterized in that: The central axes of the two nail legs (2) form a torsion angle α3 on the projection surface in the left-right direction, and the torsion angle α3 is 4° to 28°.

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