CN109984814B

CN109984814B - Fixing assembly

Info

Publication number: CN109984814B
Application number: CN201711498831.6A
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: 2017-12-29
Filing date: 2017-12-29
Publication date: 2020-11-10
Anticipated expiration: 2037-12-29
Also published as: CN109984814A

Abstract

The invention discloses a fixing assembly, which is used for separating a first element from a second element and comprises a fixing block and a body, wherein the fixing block is fixedly connected with the body; the fixing block comprises a through hole, the body is provided with a containing groove for containing the second element, and the through hole is arranged corresponding to the containing groove; the through hole allows the distal end of the first element and the second element to pass through, allows the distal end of the first element to exit, and prevents the second element from separating from the accommodating groove, so that the first element and the second element are separated. According to the fixing structure, the far end of the first element and the second element are allowed to pass through, the far end of the first element is allowed to withdraw, and the second element is prevented from being separated from the accommodating groove, so that the first element and the second element are effectively separated, and the puncture hole is sutured in the narrow puncture hole; avoid the puncture hole hernia caused by the puncture hole of the minimally invasive surgery.

Description

Fixing assembly

Technical Field

The present invention relates to a surgical instrument, and in particular, to a fixation assembly.

Background

Laparoscopic surgery has become widely accepted among surgical procedures, and has many advantages over traditional open surgery, including reduced trauma, faster healing, and reduced risk of infection. 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 may establish an access channel in the abdominal wall of the body for the entry of a stapler or other surgical instrument (e.g., endoscope, scissors, guide wire, catheter, filter, stent, etc.) into the abdominal cavity and provide a passage for the ingress and egress of gas to control the pneumoperitoneum required for the procedure to be performed for examination or surgical procedures. A puncture instrument is a surgical instrument used in laparoscopic surgery for establishing an artificial passage into a body cavity and generally consists of a sealing sleeve assembly and a puncture core assembly. The general clinical use mode is as follows: firstly, a small opening is cut on the skin of a patient, then the puncture end of the puncture outfit is aligned with the small cut which is cut, the puncture outfit is moved downwards while rotating left and right in a reciprocating way, after the puncture outfit enters a body cavity, the puncture core component can be taken away, and the sealing sleeve component is left to be used as a passage for the anastomat or other surgical instruments to enter and exit the body cavity. The existing puncture core assembly only plays a role in puncture, and is discarded after a guide sealing sleeve assembly enters a patient body from an incision of the human abdomen.

And (4) removing the focus, taking out the sealing sleeve component assembly, and finishing the operation. The punctured wound is generally not sutured and is automatically healed only by the patient; because the puncture hole of the minimally invasive surgery is small and deep, particularly, the abdominal wall of an obese patient is thick, the visual field of the suture is small, the skin on the surface of the patient is only sutured after the surgery, and the peritoneum on the inner side of the abdominal wall is difficult to suture. Such patients are prone to serious complications such as hernia in the puncture hole after surgery, and require further treatment. When the puncture holes of patients need to be sutured, especially the puncture holes of fat patients, only a suturing device special for suturing the puncture holes can be used, but surgical instruments are additionally added, the suturing cost is high, the surgical instruments are multiple, and the operation is inconvenient; in addition, the suturing device specially used for suturing the puncture hole has a complex structure and is inconvenient to use.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a puncture core assembly with a puncture function and capable of suturing a puncture hole and a puncture outfit with the same, and the invention is realized by the following technical scheme:

a fixing assembly for separating a first element from a second element comprises a fixing block and a body, wherein the fixing block is fixedly connected with the body; the fixing block comprises a through hole, the body is provided with a containing groove for containing the second element, and the through hole is arranged corresponding to the containing groove; the through hole allows the distal end of the first element and the second element to pass through, allows the distal end of the first element to exit, and prevents the second element from separating from the accommodating groove, so that the first element and the second element are separated.

The main body part of the fixed block is a flat cylinder and comprises at least two through grooves.

The fixed block comprises two through grooves.

The through hole is positioned in the through groove, and the diameter of the near end of the through hole is larger than the width of the through groove.

The through hole comprises a first section of hole and a second section of hole, the diameter of the first section of hole is larger than that of the second section of hole, and the diameter of the second section of hole is larger than that at the far end of the first element.

The diameter of the second section of the hole is smaller than the diameter of the proximal end of the second element.

The accommodating groove and the second element are in contour fit, and the accommodating groove and the second element are in interference fit.

Each of the two sides of the through groove is provided with a deformation sheet, and the other side of each deformation sheet is provided with a yielding groove.

The first element is a suture needle and the second element is a detachable needle tip.

The detachable needle tip includes a winding channel for receiving and securing the suture.

The near end of each fixed block is also provided with anti-skid lines.

The upper surface of the fixed block is set to be an arc surface.

According to the fixing assembly, the distal end of the first element and the second element are allowed to pass through, the distal end of the first element is allowed to withdraw, the second element is prevented from being separated from the accommodating groove, and the first element and the second element are effectively separated, so that the puncture hole is sutured in the narrow puncture hole; avoid the puncture hole hernia caused by the puncture hole of the minimally invasive surgery.

Drawings

FIG. 1 is a schematic structural view of a piercing core assembly according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a piercing core assembly according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a piercing rod assembly according to an embodiment of the present invention;

figure 4 is a schematic structural view of a first inner rod assembly in accordance with an embodiment of the present invention;

figure 5a is a schematic structural view of a second inner rod assembly in accordance with an embodiment of the present invention;

figure 5b is a schematic view of another angular configuration of the second inner rod assembly in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of a knob according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a needle assembly according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a detachable needle tip according to an embodiment of the present invention;

FIG. 9 is a schematic structural view of a piercing tip assembly according to an embodiment of the present invention;

FIG. 10a is a top view of a fixation block according to an embodiment of the present invention;

FIG. 10b is a schematic view of another structure of the fixing block according to the embodiment of the present invention;

FIG. 10c is a cross-sectional view of a fixation block along a suture pathway according to an embodiment of the present invention;

FIG. 11 is a schematic structural view of an initial state of the piercing core assembly according to an embodiment of the present invention;

FIG. 12 is a schematic view of the puncture core assembly after forming a suture space in accordance with an embodiment of the present invention;

FIG. 13 is a schematic representation of the configuration of the puncture core assembly upon suturing in accordance with an embodiment of the present invention;

FIG. 14 is a schematic view of a target tissue after being sutured, according to an embodiment of the invention;

fig. 15 is a schematic structural view of a puncture instrument according to an embodiment 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. In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings. Furthermore, the terms "first", "second" and "first" 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.

The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. As shown in FIG. 1, the puncture core assembly 100 of the present embodiment includes a puncture tip assembly 1, a puncture rod assembly 2, and a suture key 31. For ease of describing the invention and to simplify the description, in embodiments of the invention the end closer to the clinician is "proximal" or "above" and the end further from the clinician, i.e. closer to the patient's body, is "distal" or "below". Based on the orientation or position relationship shown in fig. 1, one end close to the suture key 31 is regarded as "proximal end" or "upper", and one end close to the puncture end 1 is regarded as "distal end" or "lower"; the axial direction of the puncture core assembly 100 is referred to as the "height" direction, and the radial direction of the puncture core assembly 100 is referred to as the "width" direction; the direction toward the central axis of the puncture core assembly 100 is referred to as "inner side", and the direction away from the central axis of the puncture core assembly 100 is referred to as "outer side".

As shown in fig. 1, the puncture core assembly 100 includes a puncture rod assembly 2, a puncture tip assembly 1 disposed at the distal end of the puncture rod assembly 2, a knob 5 disposed at the proximal end of the puncture rod assembly 2, and a suture key 31, and the puncture core assembly 100 further includes a first inner rod assembly 3 and a second inner rod assembly 4. FIG. 2 is a cross-sectional view of the piercing core assembly 100 depicting the composition and assembled relationship of the piercing core assembly 100 in accordance with an embodiment of the present invention. The puncture core assembly 100 comprises a second inner rod assembly 4, a first inner rod assembly 3 and a puncture rod assembly 2 from inside to outside in sequence. At least a portion of the second inner rod assembly 4 is located within the first inner rod assembly 3, and at least a portion of the first inner rod assembly 3 is located within the puncture rod assembly 2; and the central axis of the second inner rod body 40, the central axis of the first inner rod body 30 and the central axis of the puncture rod body 20 are all coincident. At least a part of the second inner rod assembly 4 is located in the first inner rod assembly 3, which means the position relationship between the two, and not all the components of the second inner rod assembly 4 are located in the first inner rod assembly 3.

Referring to fig. 3, the puncture rod assembly 2 includes a puncture rod body 20, the puncture rod body 20 is an elongated cylinder and includes a suture passage 23 extending up and down, and the first inner rod body 30 is located in the suture passage 23 and can move up and down relative to the suture passage 23. The proximal end of the puncture rod body 20 is provided with a stop ring 26 formed by extending along the radial direction of the puncture rod body, a handle 24 is arranged above the stop ring 26, the handle 24 is a hollow cylinder, the diameter of the stop ring 26 is larger than that of the handle 24, the diameter of the handle 24 is larger than that of the puncture rod body 20, and two limiting protrusions 25 are symmetrically arranged on the outer wall of the handle 24. The distal end of the puncture rod body 20 is symmetrically provided with a needle receiving groove 22 for receiving the suture needle 7 and the detachable needlepoint 8. The needle receiving groove 22 extends to the distal end of the puncture rod body 20, the length of the needle receiving groove 22 is equal to or slightly greater than the length of the suture needle 7, and the distal end of the needle receiving groove 22 is further provided with a stopper 21 for restricting the axial movement of the suture needle 7 and the detachable needlepoint 8 in the needle receiving groove 22. The needle receiving slot 22 thus limits the first inner rod body 30 from rotating circumferentially but only up and down within the puncture rod assembly 2. Further, a projection (not shown) on the inner wall of the puncture rod body 20 at the barrier portion 21 abuts on the distal end of the first elastic element 35.

Referring to fig. 4 or 2, the first inner rod assembly 3 comprises a first inner rod body 30, and a suture key 31 fixedly connected to a proximal end of the first inner rod body 30. The distal end of the first inner rod body 30 is further provided with a first elastic element 35, optionally, the first elastic element 35 is a spring, and the distal end of the first inner rod body 30 is fixedly connected to the first elastic element 35. The first inner rod body 30 has a cavity (not shown) formed therein and extending vertically therethrough, and the second inner rod body 40 is located in the cavity and is movable vertically therein. The proximal end of the first inner rod body 30 is also symmetrically provided with first kidney-shaped holes 34, the distal end of the first inner rod body 30 is symmetrically provided with first mounting parts 33 which are matched with the suture needle 7, and the first kidney-shaped holes 34 and the first mounting parts 33 are on the same straight line. After the first inner rod assembly 3 extends into the far end of the puncture rod assembly 100, the first inner rod assembly 3 is adjusted to enable the first installation part 33 of the first inner rod assembly 3 to be aligned with the needle accommodating groove 22 of the puncture rod body 20, so that the suture needles 7 are in interference fit or transition fit with the first installation part 33 from the needle accommodating groove 22, and after the two suture needles 7 are fixedly connected with the first inner rod body 30, the suture needles are respectively accommodated in the needle accommodating groove 22 at the far end of the puncture rod body 20. The detachable needle tip 8 is detachably attached to the distal end of the suture needle 7, and the suture thread 9 is omitted in fig. 4 for clarity of illustration of the positional relationship.

As shown in fig. 5a to 5b, the second inner rod assembly 4 comprises a second inner rod body 40, a puncture tip assembly 1 fixedly connected to the distal end of the second inner rod body 40, and a connector 41 fixedly connected to the proximal end of the second inner rod body 40. The second inner rod body 40 is located inside the first inner rod body 30 and the first elastic element 35. The maximum diameter of the proximal end of the piercing tip assembly 1 is approximately equal to the diameter of the piercing shaft body 20, and the distal end thereof is the piercing tip. The piercing end assembly 1 is substantially conical, which means that the piercing end 1 is conical or similar, i.e. the generatrix of the piercing end assembly 1 may be straight, convex or concave. The second inner rod body 40 sequentially comprises a first rod body 44, a second rod body 45 and a third rod body 46 from near to far, the cross-sectional area of the third rod body 46 is smaller than that of the second rod body 45, and the cross-sectional area of the second rod body 45 is smaller than that of the first rod body 44. As shown in fig. 5a, the outer circumferential dimensions of the first rod 44, the second rod 45 and the third rod 46 are also reduced in sequence. The third rod 46 is a cylinder or a cuboid, and the cross-sectional area of the third rod is smaller than that of the puncture rod body 20, so that an accommodating space is formed between the puncture end 1 and the puncture rod body 20; when it is a cylinder, its diameter is smaller than the diameter of the puncture rod body 20, and when it is a rectangular parallelepiped, its width and length are both smaller than the diameter of the puncture rod body 20. On the premise of meeting the required strength, the smaller the cross-sectional area of the third rod 46 is, the better, so that the accommodating space formed between the proximal end of the puncture tip 1 and the distal end of the puncture rod body 20 is larger. Further, the central axis of the second inner rod body 40 coincides with the central axis of the puncture rod body 20. The distal end of the puncture tip assembly 1 can move relative to the puncture rod body 20 by a distance greater than or equal to the thickness of the patient's subcutaneous tissue.

Referring to fig. 5b, the connection member 41 includes a rotation shaft 411, a step 412, and a through hole 413. The proximal end of the first inner stem body 30 is located within the through bore 413 and the second inner stem body 40 is located within the first inner stem body 30. The central axis of the first stem body 30, the central axis of the second stem body 40 and the central axis of the connector 41 all coincide. The proximal end of the second inner rod body 40 is further symmetrically provided with a second kidney-shaped hole 43, and a pin shaft (not shown) penetrates through the first kidney-shaped hole 34 and the second kidney-shaped hole 43 and is fixedly connected with the connecting piece 41. The groove length of the first kidney-shaped hole 34 is greater than that of the second kidney-shaped hole 43, and the groove length of the second kidney-shaped hole 43 is greater than the diameter of the pin shaft; the width of the first kidney-shaped hole 34 is equal to the width of the second kidney-shaped hole 43, and both are slightly larger than the diameter of the pin shaft, so that the pin shaft limits the second inner rod body 40 to move up and down in the first inner rod body 30 and not to rotate circumferentially.

Referring to fig. 6, the knob 5 is a hollow cylindrical housing, and a limit groove 51 is formed on a side wall thereof. The limit protrusion 25 of the puncture rod assembly 2 can move in the limit groove 51, and two limit grooves 51 are arranged on the side wall of the knob 5 corresponding to the two limit protrusions 25. Each limiting groove 51 comprises a first section 51a, a second section 51b and a third section 51c, wherein the first section 51a and the third section 51c are linear, the middle second section 51b is curved, and the three sections of the limiting groove 51 are sequentially connected smoothly, so that the whole limiting groove is approximately S-shaped. The first section 51a of the limiting groove 51 is an initial position, a first positioning key 511 is arranged on the inner side of the groove, the second section 51b is a stroke adjusting position, the third section 51c is a final position, a second positioning key 512 is arranged on the inner side of the groove, when the limiting protrusion 25 is located at the initial position or the final position, the first positioning key 511 or the second positioning key 512 is respectively used for fixing the limiting protrusion 25 to prevent unexpected movement, and the first positioning key 511 and the second positioning key 512 are protrusions with small height. In order to facilitate the turning of the knob 5, the outer surface thereof is provided with first anti-slip threads 52 to increase the friction force and thus to prevent slipping. Referring to fig. 5b and 6, the knob 5 further has a circular hole wall 53, the circular hole wall 53 surrounds the rotating shaft 411 of the connecting member 41, and the lower surface of the circular hole wall 53 abuts against the upper surface of the step 412 of the connecting member 41.

The suture assembly comprises a suture needle 7 and a detachable needlepoint 8, as shown in fig. 7, the suture needle 7 and the detachable needlepoint 8 are detachably connected, and one end of a suture thread 9 passes through the tissue in the accommodating space through the connected suture needle 7 and the detachable needlepoint 8 by moving. The suture needle 7 comprises a second installation part 71 and a first connection part 72, the suture needle 7 is fixedly connected with the first installation part 33 of the first inner rod body 30 through interference fit or transition fit of the second installation part 71, and the distance between the two suture needles 7 is equal to or slightly smaller than the diameter of the puncture rod body 20. Referring to fig. 8, the detachable needle tip 8 is provided with a blind hole with an upward opening, the blind hole is a second connecting portion 82, the first connecting portion 72 at the distal end of the suture needle 7 extends into the second connecting portion 82, and the first connecting portion 72 and the second connecting portion 82 are connected in a clearance fit manner; the detachable needlepoint 8 further comprises a needlepoint 83 and a winding groove 81, the winding groove 81 is positioned on the side wall or below the second connecting part 82, a tail 91 of the suture 9 is wound on the winding groove 81 and forms a knot at the winding groove 81, two tails 91 of the suture 9 are respectively matched with one detachable needlepoint 8, and the proximal end 92 of the suture 9 extends upwards along the outer wall of the puncture rod body 20.

As shown in fig. 9, the puncture tip assembly 1 comprises a puncture tip body 10 and a fixing block 6, wherein the proximal end of the puncture tip body 10 is provided with symmetrically arranged accommodating grooves 11 for accommodating the detachable needle tip 8 and the distal end of the suture thread 9 after suturing; the containing groove 11 is a groove which is matched with the detachable needle point 8 in a copying manner, and the detachable needle point 8 is in interference fit with the containing groove 11. The near end of the puncture end body 10 is further provided with a mounting hole 13, correspondingly, the far end of the fixing block 6 is provided with mounting columns 66 extending axially, the mounting columns 66 correspond to the mounting holes 13 in number one by one, and the fixing connection between the fixing block 6 and the puncture end body 10 is realized through the interference fit of the mounting columns 66 and the mounting holes 13. The puncture end component 1 is provided with a hole fixedly connected with the second inner rod component 4, and specifically, the distal end of the second inner rod component 4 is fixedly connected with the second inner rod fixing hole 12 on the puncture end body 10 after passing through the second inner rod mounting hole 65 on the fixing block 6.

Referring to fig. 10a to 10c, the main body of the fixing block 6 is a flat cylinder, the flat cylinder includes a through groove 61, preferably, in an embodiment of the present invention, the fixing block 6 includes two through grooves 61, a connecting line of the two through grooves 61 passes through a center of the fixing block 6, a length of each through groove 61 is smaller than a radius of the fixing block 6, a width of each through groove 61 is smaller than a diameter of the first connecting portion 72 of the suture needle 7, and a position of each through groove 61 corresponding to the accommodating groove 11 is expanded outward to form a suture needle through hole 62; two sides of each through groove 61 are respectively provided with a deformation sheet 64, and the other side of each deformation sheet 64 is provided with an abdicating groove 63. The needle through hole 62 includes a first section 62a and a second section 62b, the first section 62a has a diameter larger than that of the second section 62b, and the second section 62b has a diameter larger than that of the first connecting portion 72 of the needle 7. As shown in fig. 10c, the cross-section of the inner walls of the first section of hole 62a and the second section of hole 62b is stepped, inclined or cambered. Thus, when the suture assembly sequentially passes through the suture needle through hole 62, the deformation pieces 64 at the two sides of the suture needle through hole 62 are pressed to deform toward the receding groove 63, so as to allow the detachable needlepoint 8 to pass through the suture needle through hole 62 from near to far into the accommodating groove 11, because the diameter of the second section of hole 62b is larger than the diameter of the first connecting part 72 of the suture needle 7, and the diameter of the second section of hole 62b is smaller than the diameter of the proximal end of the detachable needlepoint 8. The suture needle 7 can be sutured through the suture needle through hole 62, and can be retracted into the needle receiving groove 22 at the distal end of the puncture rod body 20 through the suture needle through hole 62 after suturing. After the detachable needlepoint 8 enters the accommodating groove 11, the diameter of the second section hole 62b of the suture needle through hole 62 is smaller than that of the proximal end of the detachable needlepoint 8, and the suture needle through hole 62 can effectively prevent the detachable needlepoint 8 from moving upwards, so that the risk that the detachable needlepoint 8 falls off from the accommodating groove 11 is avoided. Optionally, the suture needle through hole 62 further includes a third section of hole 62c, and the diameter of the third section of hole 62c is the same as that of the accommodating groove 11; the first, second, and

third holes

62a, 62b, 62c are coaxially arranged.

In another embodiment of the present invention, as shown in fig. 10b, the upper surface of the fixing block 6 may be further provided with an arc-shaped surface to increase the distance between the upper surface of the fixing block 6 and the distal end of the puncture rod assembly 2, i.e., to increase the suturing space. As shown in fig. 9 or fig. 10c, the upper surface of the fixing block 6 is further provided with a second anti-slip pattern 67, which can increase the friction force with the clamped tissue to be sutured, and prevent the tissue to be sutured from slipping out of the space during suturing. In order to clearly show the structure of the fixing block 6, the second anti-slip threads 67 are omitted in fig. 10b and 10 a.

The thread tail 91 of the suture thread 9 is wound on the winding groove 81 and forms a thread knot at the winding groove 81, after the two thread tails 91 of the suture thread 9 are respectively matched with one detachable needlepoint 8, the first connecting part 72 of the suture needle 7 is connected with the second connecting part 82 of the detachable needlepoint 8, the suture needle 7 and the detachable needlepoint 8 are arranged in the needle accommodating groove 22, and the length of the needle accommodating groove 22 is equal to or slightly greater than that of the suture needle 7; and the outer surfaces of the suture needles 7 and the detachable needlepoint 8 do not exceed the outer surface of the puncture rod body 20, so that the suture needles 7 are far away from the puncture hole during suture, and the distance between the two suture needles 7 is equal to or slightly smaller than the diameter of the puncture rod body 20, thereby ensuring that the maximum suture range is provided on the premise of not enlarging the puncture hole.

During operation, firstly, a small incision is cut on the abdomen of a patient, then the puncture tip 14 of the puncture outfit 300 is aligned with the cut small incision to rotate in a left-right reciprocating manner, and the puncture outfit 300 is moved downwards at the same time until the distal end of the cannula assembly 200 passes through the abdominal cortex of the patient to a proper position; in an initial state, the limiting protrusion 25 is positioned in the first section 51a of the limiting groove 51 and is constrained by the first positioning key 511, the limiting protrusion 25 of the puncture rod assembly 2 and the limiting groove 51 of the knob 5 keep relatively static, and the proximal end of the puncture end assembly 1 is abutted against the distal end of the puncture rod body 20, so that no gap exists between the puncture end 1 and the puncture rod body 20, and the tissue of a patient cannot be clamped during puncture. Following withdrawal of the puncture core assembly 100, a stapler or other surgical instrument may be advanced through the puncture cannula assembly 200 into and out of the patient's abdominal cavity for a surgical procedure.

After the intra-abdominal procedure is completed, the puncture core assembly 100 of the present embodiment is reinserted into the patient through the cannula assembly 200, and the cannula assembly 200 is omitted from FIGS. 11-13 to clearly show the mating relationship of the components of the puncture core assembly 100. Referring to FIG. 11, the stop protrusion 25 is located within the first segment 51a of the stop slot 51, and the proximal end of the piercing tip assembly 1 abuts the distal end of the piercing body 20 such that there is no gap between the piercing tip 1 and the piercing body 20. After the puncture tip 14 of the puncture core assembly 100 reaches the target position, the knob 5 is rotated, as shown in fig. 12, the limiting protrusion 25 is acted by an external force and moves from the first section 51a to the second section 51b, the annular hole wall 53 of the knob 5 rotates around the rotating shaft 411 of the connecting member 41, because the lower surface of the annular hole wall 53 abuts against the upper surface of the step 412 of the connecting member 41, the step 412 is forced to move downward, the connecting member 41 is driven to move downward, the force is transmitted to the second inner rod assembly 4 through the pin shaft of the second inner rod assembly 4, because the pin shaft (not shown) penetrates through the first kidney-shaped hole 34 and the second kidney-shaped hole 43 and is fixedly connected with the connecting member 41, and limited by the pin shaft and the first kidney-shaped hole 34, the second inner rod body 40 and the puncture end 1 move downward, so that an accommodating space is formed between the puncture end assembly 1 and the.

The knob 5 is rotated continuously until the limit protrusion 25 moves to the third section 51c, at this time, the distal end of the knob 5 abuts against the stop ring 26 of the puncture rod assembly 2, and the stop ring 26 prevents the knob 5 from rotating continuously. Meanwhile, the limiting protrusion 25 and the limiting groove 51 are kept relatively still under the constraint of the second positioning key 512, so that the puncture rod assembly 2 and the knob 5 are kept relatively still, and the second inner rod assembly 4 does not move downwards any more, thereby achieving the required accommodating space. At this point, the proximal end of the piercing core assembly 100 is grasped and the piercing core assembly 100 is slowly moved upwardly until the grasping surface of the distal end of the anchor block 6 of the piercing tip assembly 1 contacts the underlying layer of the target tissue. Due to the elasticity of the tissue of the human body, the tissue at the puncture hole gradually fills the accommodating space, that is, the tissue at the puncture hole wraps the third rod body 46 of the second inner rod assembly 4, and fills the accommodating space between the proximal end of the fixing block 6 and the distal end of the puncture rod assembly 2.

Next, pressing the suture button 31 downwards, as shown in fig. 13, the suture button 31 pushes the first inner rod body 30, the suture needles 7 and the detachable needle point 8 to move downwards at the same time, the elastic element 35 is compressed by force, and the first connecting portions 72 of the two suture needles 7 respectively guide the detachable needle point 8 and drive the two end tails 91 of the suture thread 9 to move downwards. FIG. 14 illustrates a process by which target tissue is sutured, in accordance with an embodiment of the present invention. The skin of a human body is sequentially provided with a skin layer, a dermis layer and a subcutaneous tissue from outside to inside, and the puncture hole can not be opened as long as the fascia layer at the subcutaneous tissue F at the lowest layer of the puncture hole of a patient is sutured, so that the skin layer and the dermis layer are easy to automatically heal, and the hernia of the puncture hole can be effectively prevented; preferably, the knot is tied in the dermis layer E of the puncture hole of the patient, so that the thread knot is positioned in the puncture hole and the skin of the patient is not exposed, thereby preventing the thread knot from being touched after the operation, preventing the puncture hole from opening because the subcutaneous tissue of the patient is sutured, and facilitating the automatic healing of the epidermis layer or the dermis layer. Preferably, the suture 9 is a human absorbable suture. The first connecting parts 72 of the two suture needles 7 respectively guide the detachable needlepoint 8, and then the two end line tails 91 of the suture line 9 to gradually contact and pierce through the tissues in the accommodating space between the fixed block 6 and the puncture rod assembly 2 from A, B two points of the subcutaneous tissues F, and guide the detachable needlepoint 8 to be installed in the accommodating groove 11 on the piercing end 1, and the two end line tails 91 of the suture line 9 respectively pierce through the fascia layers at the subcutaneous tissues F from D, C two points. Due to the elasticity of human tissue, the tissue at the puncture hole wraps the third rod 46 of the second inner rod assembly 4, so that the suture needle 7 guides the detachable needle point 8 to enter from A, B and exit from D, C. When the detachable tip 8 has been secured within the receiving slot 11 in the piercing end 1 (i.e., indicating that the needle 7 has fully penetrated the subcutaneous tissue of the patient), the detachable tip 8 introduces the tail 91 of the suture 9 below the subcutaneous tissue F of the patient because the tail 91 of the suture 9 has previously formed a knot at the winding slot 81. After the two end tails 91 of the suture thread 9 penetrate the subcutaneous tissue F from D, C, the proximal end of the puncture core assembly 100 is held, and the puncture core assembly 100 is moved downwards by a stroke, so that the puncture end assembly 1 drives the end tails 91 of the suture thread 9 in the accommodating groove 11 to move continuously into the abdominal cavity by a stroke, the distance of the stroke is greater than the thickness of the subcutaneous tissue F, the thickness of the subcutaneous tissue F even including the thickness of the dermis and the epidermis can be compensated, the stroke of the continuous movement enables the end tails 91 to be pulled out from the subcutaneous tissue F even from the abdominal wall when being turned to move upwards, and meanwhile, the distal end of the suture thread 9 gradually enters the body of the patient, so that the suture thread can be pulled out conveniently.

Then, the suture key 31 is released, the first elastic element 35 is released and extends, because the distal end of the first elastic element 35 abuts against a protrusion (not shown) on the inner wall of the puncture rod body 20 at the blocking part 21, and the proximal end of the first elastic element abuts against the distal end of the first inner rod body 30, the elastic restoring force of the first elastic element 35 pushes the first inner rod assembly 3 to move upwards, the first inner rod body 30 drives the suture needle 7 to move upwards, and because the matching mode of the detachable needle point 8 and the accommodating groove 11 of the puncture end 1 is interference fit, the detachable needle point 8 is difficult to separate from the accommodating groove 11 after matching, and the suture needle 7 is in clearance fit with the detachable needle point 8; therefore, after the suture key 31 is released, the first inner rod body 30 drives the suture needle 7 to separate from the detachable needle point 8, the suture needle 7 is retracted to the needle accommodating groove 22 at the distal end of the puncture rod body 20, and the detachable needle point 8 is located in the accommodating groove 11 of the puncture end 1.

Referring again to fig. 14, holding the puncture device 300 and moving the puncture device 300 upward until the puncture tip 14 of the puncture end assembly 1 is separated from the patient, the detachable needle point 8 is fixedly connected with the accommodating groove 11, the detachable needle point 8 is separated from the body of the patient together with the puncture end assembly 1, because the tail 91 of the suture thread 9 is connected with the detachable needle point 8, the tail 91 of the suture thread 9 is located below the subcutaneous tissue of the patient, and during the process of separating the puncture end 1 from the body of the patient, the two tail 91 of the suture thread 9 move upward from the puncture hole, thereby facilitating the pulling of the tail 91 out of the abdominal cavity through the puncture end assembly 1. After the puncture tip assembly 1 is removed from the patient's body, the two suture tails 91 of the suture 9 are pulled tight and tied off, and the excess suture 9 is removed, thereby completing the puncture. The occurrence of puncture hernia can be effectively prevented only by suturing the subcutaneous tissue at the puncture hole of the patient; preferably, the knot is tied in the dermis of the patient so that the knot is positioned in the puncture hole and does not leak out of the skin of the patient, so that the knot is prevented from being touched after the operation, and the puncture hole is not opened because the fascia layer at the subcutaneous tissue of the patient is sutured, and the epidermis layer or the dermis layer is easy to heal automatically. Preferably, the suture 9 is a human absorbable suture.

Based on the puncture core assembly 100 as described above, the present invention further provides a puncture device 300, referring to fig. 15, the puncture device 300 further comprises a cannula assembly 200, during puncturing, the puncture core assembly 100 is inserted into the puncture cannula assembly 200, and the cannula assembly 200 is guided into the abdominal cavity of the patient, so as to allow other surgical instruments to enter the body of the patient for performing a surgical operation, and after the cutting and suturing operation is completed, the puncture device 300 of the present invention can also suture the puncture hole.

In summary, according to the fixing assembly of the present invention, the distal end of the first element and the second element are allowed to pass through, and the distal end of the first element is allowed to withdraw and the second element is prevented from disengaging from the receiving groove, so that the first element and the second element are effectively separated, and the puncture hole is sutured in the narrow puncture hole; avoid the puncture hole hernia caused by the puncture hole of the minimally invasive surgery.

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; may be mechanically coupled, may be electrically coupled or may be in communication with each other; 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 fixing assembly for a puncture instrument, which is used for separating a first element from a second element, is characterized by comprising a fixing block and a body, wherein the fixing block is fixedly connected with the body; the fixing block comprises a through hole, the body is provided with a containing groove for containing the second element, and the through hole is arranged corresponding to the containing groove; the through-hole allows the distal end of first component with the second component passes through, and allows the distal end of first component to withdraw from, and stop the second component breaks away from the storage tank realizes the first component with the separation of second component, the fixed block includes two at least logical grooves, the through-hole is located logical inslot, the diameter of through-hole near-end is greater than the width that leads to the groove, every the both sides that lead to the groove respectively have a shape deformation piece, every the opposite side of shape deformation piece is equipped with the groove of stepping down.

2. The fastening assembly for a puncture instrument according to claim 1, wherein the main body portion of the fastening block is a flat cylinder.

3. The securing assembly for a puncture instrument according to claim 1, wherein the through hole comprises a first section of hole and a second section of hole, the first section of hole having a diameter larger than the second section of hole, the second section of hole having a diameter larger than the diameter at the distal end of the first member.

4. A mounting assembly for a puncture instrument according to claim 3, wherein the diameter of the second section of the bore is smaller than the diameter of the proximal end of the second element.

5. The fastening assembly for a puncture instrument according to claim 1, wherein the receiving groove is adapted to the second member in a form fit manner, and the receiving groove is in an interference fit manner with the second member.

6. A securing assembly for a puncture instrument according to claim 1, wherein the first element is a suture needle and the second element is a detachable needle tip.

7. The fastening assembly for a puncture instrument according to claim 6, wherein the detachable needle tip includes a winding slot for receiving and securing a suture.

8. The fastening assembly for a puncture instrument according to claim 1, wherein the proximal end of the fastening block is further provided with an anti-slip thread.

9. The fastening assembly for a puncture instrument according to claim 1, wherein the upper surface of the fastening block is provided as an arc-shaped surface.