A stapler and its working method

Abstract

The present invention belongs to the field of medical devices, and particularly relates to a stapler and its working method. The stapler includes a suturing mechanism and a linkage mechanism. The linkage mechanism is adapted to drive the suture hook to move and rotate along a specified trajectory, and after piercing the tissue to be sutured, the barb hooks the suture from the wire clamping groove. During the rotation process of the suture hook, the suture is driven to pass through the tissue to be sutured, and then the suture is cut and knotted to achieve suture stitch by stitch. It is particularly suitable for blind suture operations such as intracavitary patch or suture due to narrow paths or narrow cavities (such as gynecological pelvic cavity suture). The stapler of the present invention uses mechanical power to ensure the accuracy of suture needle distance, suture depth, and suture position, and has the advantages of simple operation, short suture time, good effect, and low surgical risk.

Description

Technical Field

[0001] The present invention relates to a medical device, and more particularly to a stapler and its working method. Background Art

[0002] Suturing in clinical surgery is an important part of the operation. Due to its good stability, simple operation, high suture quality and other advantages, using instrument suturing instead of manual suturing has become a trend in clinical surgical suturing.

[0003] However, current suturing instruments in clinical surgery also have certain limitations. In suturing internal tissues, especially blind suturing operations such as intracavitary patch or suture (e.g., suturing in the pelvic cavity of gynecology), due to the narrow cavity of the tissue to be sutured and the small operation space for suturing, traditional staplers can no longer meet the various suturing requirements such as suture pitch, suture depth, and suture position. Moreover, the current internal stapler sutures the wound in the following way: first, the suture is pierced through the tissue with the needle, then a hook is used to hook out the thread, and then the needle is withdrawn. Due to the particularity of blind suturing, not only is it difficult to accurately insert the needle, but it is also very difficult to accurately find and hook the thread hole with the hook at one time, and it is easy to unhook when pulling the thread outwards. Therefore, it requires a long time, feeling and experience.

[0004] Therefore, in the medical device industry, there is an urgent need for a new stapler that not only meets external suturing but also has good suturing effect, short time, and reduced surgical risk for special parts, so as to fill the gap of such suturing instruments in current clinical surgery. Summary of the Invention

[0005] The object of the present invention is to provide a stapler and its working method, which can accurately align the tissue to be sutured during suturing and complete needle insertion and thread hooking in one go; and has the suturing effects of simple operation, accurate position, short time, and low risk.

[0006] To solve the above technical problems, the present invention provides a stapler, comprising: a suturing mechanism and a linkage mechanism; wherein the linkage mechanism is adapted to drive the suturing mechanism to suture the tissue to be sutured.

[0007] On the other hand, the present invention also provides a stapler, comprising: a suturing mechanism, and a notch is provided at the front end of the suturing mechanism; the tissue to be sutured is adapted to be clamped into the notch and wait for suturing.

[0008] Further, the suturing mechanism comprises: a suturing hook needle with barbs and a thread groove; when the linkage mechanism drives the suturing hook needle to rotate and pierce the tissue to be sutured, the barbs hook the suture from the thread groove; the suturing hook needle rotates back, and at the same time drives the suture to pass through the tissue to be sutured.

[0009] Further, the suture mechanism further includes: a protective sleeve, which is sleeved on the suture mechanism; a first hinge adapted to enable the suture hook needle to rotate is provided inside the protective sleeve; symmetrical notches are respectively provided on both side walls of the protective sleeve, and a wire clamping groove is provided at the bottom of the symmetrical notches; the suture is adapted to span across the two wire clamping grooves and wait for the barbs to hook the suture between the two wire clamping grooves; when suturing the tissue to be sutured, the symmetrical notches are adapted to fit the surface of the tissue to be sutured, and the suture hook needle is adapted to rotate around the first hinge, that is, to move along an arc-shaped movement track, pierce the tissue to be sutured at the symmetrical notches, hook the suture at the wire clamping grooves, and then perform a rotary motion so that the suture passes through the tissue to be sutured along the movement track of the suture hook needle from the wire clamping grooves.

[0010] Further, the linkage mechanism includes: an ejecting mechanism and a holding mechanism; wherein the ejecting mechanism includes: a connecting rod, one end of the connecting rod is hinged to the suture hook needle through a second hinge, and the other end thereof is driven by the holding mechanism; the holding mechanism is adapted to drive the connecting rod to perform an ejecting or pulling-back action; that is, when the connecting rod performs an ejecting action, the suture hook needle rotates to pierce the tissue to be sutured, and when the connecting rod performs a pulling-back action, the suture hook needle rotates and resets.

[0011] Further, the holding mechanism includes: a pair of pliers body and a movable end, and a reset mechanism located therebetween; the movable end is connected to the pliers body through a third hinge; when the movable end is forced to move towards the pliers body, the top of the movable end is adapted to eject the connecting rod; and when the movable end and the pliers body are in a free state, the reset mechanism is adapted to reset the movable end to pull back the connecting rod.

[0012] Further, the reset mechanism includes: female and male elastic pieces respectively located inside the movable end and the pliers body; a plurality of clamping holes are provided on the female elastic piece, and a clamping head is provided on the male elastic piece, and the clamping head is adapted to be inserted into the corresponding clamping hole to adjust the magnitude of the resilience.

[0013] Further, the suture mechanism further includes: a thread clamping and tensioning device; the thread clamping and tensioning device is adapted to fasten both ends of the suture so that the suture between the two wire clamping grooves is in a straightened state.

[0014] Further, the thread clamping and tensioning device is installed on both sides of the top of the movable end; when the top of the movable end pulls back the connecting rod, the thread clamping and tensioning device moves away from the suture.

[0015] Further, the suture hook needle is of an arc-shaped structure, and the barbs are located on its outer arc surface; and the depth of the barbs is not greater than the diameter of the suture so that when the barbs hook the suture, the suture fills the barbs.

[0016] In a third aspect, the present invention further provides a working method of the stapler as described above, wherein the linkage mechanism is suitable for driving the suturing mechanism to perform stitch-by-stitch suturing on the tissue to be sutured.

[0017] The beneficial effect of the present invention is that the suture device of the present invention drives the suture hook needle to move and rotate along a specified trajectory through a linkage mechanism, and after piercing the tissue to be sutured, the barb hooks the suture thread from the wire clamping groove, and the suture hook needle drives the suture thread to pass through the tissue to be sutured during the rotation process, and then realizes stitch by stitch by stitch by cutting and knotting; the suture device of the present invention is not only suitable for external suturing, but also can meet various suturing requirements such as suture needle distance, suture depth and suture position, and is particularly suitable for blind suturing operations such as intracavitary patch or suture due to narrow path or narrow cavity (for example, gynecological pelvic suturing).

[0018] At the same time, the sutures passing through the sutured tissue are double-threaded. When one of the sutures is loosened, it will not cause the remaining sutures to loosen, effectively avoiding adverse consequences caused by the sutures.

[0019] The stapler of the present invention has the advantages of simple operation, short suturing time, good effect, low surgical risk, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 is a structural diagram of the stapler of the present invention;

[0022] Fig. 2 (a) and Fig. 2 (b) are motion trajectory diagrams of the suture hook of the present invention;

[0023] Figure 3(a) , 3(b) 3(c) is a schematic diagram of the suture device of the present invention suturing the arcus tendineus of the pelvic fascia (pelvic cavity);

[0024] Figure 4(a) , 4(b) 4(c) is a schematic diagram of the suture device of the invention suturing the sacrospinous ligament;

[0025] Figure 5 It is a structural diagram of the double-spring-piece reset mechanism of the present invention;

[0026] Figure 6 is a structural diagram of the press-type holding mechanism of the present invention;

[0027] In the figure: suture mechanism 1, suture hook 11, barbs 111, thread clamping groove 12, protective sleeve 13, first hinge 131, thread clamping tension device 14, gasket 141, screw 142, linkage mechanism 2, connecting rod 21, second hinge 211, tissue to be sutured 3, suture thread 4, forceps bodies 51, 61, movable end 52, male elastic piece 511, clamping head 512, female elastic piece 521, clamping hole 522, third hinge 53, push rod 62, return spring 63. Detailed implementation mode

[0028] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only showing the basic structure of the present invention in a schematic way, so they only show the components related to the present invention.

[0029] Embodiment 1

[0030] Figure 1 It is a structural diagram of the stapler of the present invention.

[0031] As Figure 1 shown, Embodiment 1 of the present invention provides a stapler, including: a suture mechanism 1 and a linkage mechanism 2; wherein the linkage mechanism 2 is adapted to drive the suture mechanism 1 to suture the tissue to be sutured 3.

[0032] Among them, the linkage mechanism drives the suture mechanism to perform a circular arc trajectory movement, which belongs to mechanical movement to ensure the stitch spacing, depth, and accurate position; due to the advantages of simple operation, flexibility, and small range, in addition to being suitable for external sutures, it is especially suitable for blind suture operations such as intracavitary patch or suture in narrow paths or due to narrow cavities (such as the hip bottom pelvis in gynecology).

[0033] Embodiment 2

[0034] Embodiment 2 of the present invention further provides a stapler, including: a suture mechanism, and a notch is provided at the front end of the suture mechanism; the tissue to be sutured is adapted to be caught in the notch and wait for suture.

[0035] Embodiment 3

[0036] On the basis of Embodiment 1 and Embodiment 2, the suture mechanism 1 in this stapler includes: a suture hook 11 with barbs 111 and a thread clamping groove 12. Specifically, when the linkage mechanism 2 drives the suture hook 11 to rotate and pierce the tissue to be sutured 3, the barbs 111 hook the suture thread 4 from the thread clamping groove 12; the suture hook 11 rotates back (return stroke), and at the same time drives the suture thread 4 to pass through the tissue to be sutured 3, and after driving the suture thread 4 to pass through the tissue to be sutured 3 again, the suture thread can be ligated by artificial means, but not limited to this, to complete a suture process. This suture mechanism is suitable for suturing the tissue to be sutured stitch by stitch, that is, only one stitch is sutured each time, and then independent ligation is performed to ensure that the tissue to be sutured is not easy to burst after suture.

[0037] Preferably, the suture hook 11 is, for example but not limited to, an arc-shaped pointed structure, and the barb 111 is located on its outer arc surface. Preferably, the outer side of the barb 111 is flush with the outer arc surface of the suture hook 11, and the groove depth of the barb 111 is not greater than the diameter of the suture 4, so that when the barb 111 hooks the suture 4, the suture 4 fills the barb 111, thereby preventing the suture hook 11 from scratching the tissue 3 to be sutured again when it rotates.

[0038] As a preferred embodiment of the suture mechanism.

[0039] Figure 2 is a movement trajectory diagram of the suture hook of the present invention.

[0040] In Figure 2, the suture mechanism 1 further includes: a protective sleeve 13, the protective sleeve 13 is sleeved on the suture mechanism 1; a first hinge 131 adapted to enable the suture hook 11 to rotate is provided inside the protective sleeve 13; symmetric notches are respectively provided on both side walls of the protective sleeve 13, which are the notches provided at the front end of the suture mechanism, and the wire clamping groove 12 is provided at the bottom of the symmetric notches; the suture 4 is adapted to span the two wire clamping grooves 12 and wait for the barb 111 to hook the suture 4 between the two wire clamping grooves 12. Specifically, taking the direction in Figure 2 as an example, when suturing the tissue 3 to be sutured, the symmetric notches are adapted to fit the surface of the tissue 3 to be sutured, and the linkage mechanism 2 drives the suture hook 11 to rotate around the first hinge 131, that is, to rotate counterclockwise (as shown by the direction F1 in Figure 2(a)), and pierce the tissue 3 to be sutured at the symmetric notches; the wire clamping position of the suture 4 is, for example but not limited to, at the bottom of the wire clamping groove 12; when the barb 111 hooks the suture 4 from the bottom of the wire clamping groove 12, at this time the linkage mechanism 2 drives the suture hook 11 to rotate back, that is, to rotate clockwise (as shown by the direction F2 in Figure 2(b)), and at the same time drives the suture 4 to pass through the tissue 3 to be sutured along the movement trajectory of the suture hook 11 from the bottom of the wire clamping groove 12, so as to suture the tissue 3 to be sutured once.

[0041] Preferably, a viewing hole is provided at the top of the protective sleeve 13, which can not only protect the wound from being contaminated, but also observe the movement state of the suture hook 11 through the viewing hole when suturing the tissue 3 to be sutured, so as to facilitate operation and accurately position the suture.

[0042] Preferably, the width of the wire clamping groove 12 is 0.02 mm less than the diameter of the suture 4 to clamp the suture 4 tightly and at the same time tension the suture 4 spanning between the wire clamping grooves 12; the bottom of the wire clamping groove 12 extends a certain distance along the groove opening direction, and the extended distance is preferably 1 mm, which not only facilitates the installation of the suture, but also keeps the suture 4 in a hooked state when the barb 111 rotates (returns) and the suture 4 enters the tissue 3 to be sutured.

[0043] The symmetric notch and the card slot of this embodiment can be arranged on any side wall (except the rear side wall) of the protective cover or have different shapes to meet the suture requirements such as suture pitch, suture depth, and suture site. Among them, the width and depth of the symmetric notch are determined by the set suture pitch and suture depth respectively.

[0044] As an optional implementation manner of the stapler of the present invention for suturing the arcus tendineus fasciae pelvis.

[0045] Figure 3 is a schematic diagram of the stapler of the present invention for suturing the arcus tendineus fasciae pelvis (pelvis).

[0046] In Figure 3, the symmetric notch is arranged at the front part of the protective cover to facilitate the operation of suturing the arcus tendineus fasciae pelvis; the width and depth of the symmetric notch are set according to the shape of the arcus tendineus fasciae pelvis, suture pitch, and suture depth, which can not only ensure that the symmetric notch fits on the surface of the arcus tendineus fasciae pelvis but also ensure the suture quality. Specifically, when the suture hook needle 11 rotates counterclockwise (as shown by the direction F1 in Figure 3(a)), the suture hook needle 11 is adapted to pass through the arcus tendineus fasciae pelvis (the tissue to be sutured 3) at the symmetric notch. When the barb 111 reaches the card slot 12 and hooks the suture thread, the suture hook needle rotates back (as shown by the direction F2 in Figure 3(b)), driving the suture thread to pass through the arcus tendineus fasciae pelvis (the tissue to be sutured 3) along the movement track of the suture hook needle (as shown by the direction F3 in Figure 3(c)), and then moving the stapler away, cutting and ligating the suture thread to complete one suture (as shown in Figure 3(c)).

[0047] As an optional implementation manner of the stapler of the present invention for suturing the sacrospinous ligament.

[0048] Figure 4 is a schematic diagram of the stapler of the invention for suturing the sacrospinous ligament.

[0049] In Figure 4, the symmetric notch is arranged at the left front part of the protective cover. For the specific implementation process, refer to the relevant discussion of the stapler suturing the arcus tendineus fasciae pelvis in this embodiment, which will not be elaborated here.

[0050] In other embodiments, as long as the symmetric notch and the card slot are installed, the suture hook needle can achieve the effect of piercing the tissue to be sutured at the symmetric notch and returning after hooking the suture thread at the card slot, driving the suture thread to pass through the tissue to be sutured. Therefore, as long as the symmetric notch and the card slot are used, they are within the protection scope of this application.

[0051] Further, the linkage mechanism 2 includes: an ejection mechanism and a gripping mechanism; wherein the ejection mechanism includes: a connecting rod 21, one end of the connecting rod 21 is hinged to the suture hook 11 through a second hinge 211, and the other end is driven by the gripping mechanism; the gripping mechanism is adapted to drive the connecting rod 21 to perform an ejection or retraction action; that is, when the connecting rod 21 performs an ejection action, the suture hook 11 rotates to pierce the tissue 3 to be sutured, and when the connecting rod 21 performs a retraction action, the suture hook 11 rotates back to its original position.

[0052] Preferably, the connecting rod 21 is an elongated rod, which can not only reduce the weight of the stapler but also increase the operating depth and save operating space when performing internal sutures.

[0053] Preferably, a hollow tube 22 is sleeved outside the connecting rod 21, and one end of the hollow tube 22 abuts against the protective sleeve 13 to avoid secondary damage caused by the ejection or retraction action of the connecting rod 21 during suturing.

[0054] As an alternative embodiment of the gripping mechanism.

[0055] Figure 1 is the structural diagram of the stapler of the present invention.

[0056] See Figure 1 , the gripping mechanism includes: a clamp body 51 and a movable end 52, and a reset mechanism located between the two; the movable end 52 is connected to the clamp body 51 through a third hinge 53; the clamp body 51 abuts against the bottom of the hollow tube 22. Specifically, when the movable end 52 is forced to move towards the clamp body 51, the top of the movable end 52 is adapted to eject the connecting rod 21; and when the movable end 52 and the clamp body 51 are in a free state, the reset mechanism is adapted to reset the movable end 52 to pull back the connecting rod 21.

[0057] Figure 5 is the structural diagram of the double elastic sheet reset mechanism of the present invention.

[0058] See Figure 5 , optionally, the reset mechanism includes: female and male elastic sheets respectively located inside the movable end 52 and the clamp body 51; a plurality of card holes 522 are provided on the female elastic sheet 521, and a card head 512 is provided on the male elastic sheet 511, and the card head 512 is adapted to be inserted into the corresponding card holes 522 to adjust the magnitude of the resilience force, which has the advantages of simple structure, fast resilience, and reliable mechanical performance.

[0059] As another preferred embodiment of the gripping mechanism.

[0060] Figure 6 is the structural diagram of the pressing-type gripping mechanism of the present invention.

[0061] InFigure 6 Among them, the holding mechanism includes: a pair of pliers bodies 61, a push rod 62 passing through the pair of pliers bodies 61 and connected to the connecting rod 21, and a return spring 63 located at the bottom of the push rod 62; the return spring 63 is adapted to pass through the connecting rod 21 and abut against the bottom of the push rod 62.

[0062] This holding mechanism drives the connecting rod to eject through the push rod, and pulls the connecting rod back to its original position through the return spring. The operation is convenient, and the connecting rod can be accurately moved to the required position, thus avoiding the problem of incomplete suturing caused by the suture hook not reaching the required position.

[0063] Furthermore, the suture mechanism 1 further includes: a thread clamping and tensioning device 14; the thread clamping and tensioning device 14 is adapted to fasten both ends of the suture 4 so that the suture 4 between the two thread clamping grooves 12 is in a straightened state.

[0064] Preferably, the thread clamping and tensioning device 14 is installed on both sides of the top of the movable end 52.

[0065] As an alternative embodiment of the tensioning device.

[0066] Figure 1 It is a structural diagram of the stapler of the present invention.

[0067] As Figure 1 shown: The tensioning device includes gaskets attached to both sides of the movable end 52, and the two gaskets are respectively fixed by corresponding screws; when the top of the movable end 52 pulls the connecting rod 21 back, the thread clamping and tensioning device 14 moves away from the suture 4. Specifically, the gaskets are adapted to clamp both ends of the suture 4 when the screws are tightened, so that the suture 4 is tensioned; when the suture hook 11 rotates, the movable end 52 drives both ends of the suture 4 to move, so that the suture 4 between the thread clamping grooves 12 and the thread clamping and tensioning device 14 is in a relaxed state. When the suture hook 11 rotates back, it drives the suture 4 to pass through the tissue 3 to be sutured. The thread clamping and tensioning device 14 moves away from the suture 4, so that after the suture hook 11 completes the rotation, the suture 4 is in a tensioned state, which is convenient for medical workers to remove both ends of the suture 4 from the clamping device 14 for ligation, effectively improving the suturing quality.

[0068] In other embodiments, as long as a tensioning device appears to tension the suture, it is within the protection scope of the present application.

[0069] Embodiment 4

[0070] Based on the above embodiments, Embodiment 4 of the present invention further provides a working method of the stapler described above. The stapler includes: a suture mechanism and a linkage mechanism; wherein the linkage mechanism is adapted to drive the suture mechanism to suture the tissue to be sutured stitch by stitch.

[0071] For the specific structures and implementation processes of the stitching mechanism and the linkage mechanism, refer to the relevant discussions in Embodiment 1, Embodiment 2, and Embodiment 3, which will not be elaborated here.

[0072] Taking the above ideal embodiments based on the present invention as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A stapler, characterized in that, Comprising: A suturing mechanism and a linkage mechanism; the linkage mechanism is adapted to drive the suturing mechanism to perform stitch-by-stitch suturing on the tissue to be sutured; wherein, The suturing mechanism includes: a suturing hook needle with barbs and a thread slot; After the linkage mechanism drives the suturing hook needle to rotate and pierce the tissue to be sutured, the barbs hook the suture from the thread slot; the suturing hook needle rotates back, and at the same time drives the suture to pass through the tissue to be sutured. A notch is provided at the front end of the suturing mechanism; the tissue to be sutured is adapted to be caught in the notch and wait for suturing; The suturing mechanism further includes: a protective sleeve, and the protective sleeve is sleeved on the suturing mechanism; The linkage mechanism is adapted to drive the suturing mechanism to suture the tissue to be sutured; The linkage mechanism includes: an ejecting mechanism and a holding mechanism; wherein The ejecting mechanism includes: a connecting rod, one end of the connecting rod is hinged to the suturing hook needle through a second hinge, and the other end is driven by the holding mechanism. A hollow tube is sleeved outside the connecting rod, and one end of the hollow tube abuts against the protective sleeve; A first hinge adapted to enable the suturing hook needle to rotate is provided inside the protective sleeve; Symmetrical notches are respectively provided on both side walls of the protective sleeve, which are the notches provided at the front end of the suturing mechanism, and the thread slot is provided at the bottom of the symmetrical notches; The suture is adapted to span the two thread slots and wait for the barbs to hook the suture between the two thread slots; When suturing the tissue to be sutured, the symmetrical notches are adapted to fit the surface of the tissue to be sutured, and the suturing hook needle is adapted to rotate around the first hinge, that is, to move along an arc-shaped trajectory, and pierce the tissue to be sutured at the symmetrical notches, hook the suture at the thread slot, and then perform a rotational movement so that the suture passes through the tissue to be sutured along the movement trajectory of the suturing hook needle from the thread slot.

2. The stapler according to claim 1, wherein The holding mechanism is adapted to drive the connecting rod to perform an ejecting or pulling-back action; that is When the connecting rod performs an ejecting action, the suturing hook needle rotates and pierces the tissue to be sutured, and When the connecting rod performs a pulling-back action, the suturing hook needle rotates back to its original position.

3. The stapler according to claim 2, wherein The holding mechanism includes: a pair of pliers and a movable end, and a reset mechanism located between the two; The movable end is connected to the pair of pliers through a third hinge; When the movable end is forced to move towards the pair of pliers, the top of the movable end is adapted to eject the connecting rod; and When the movable end and the pair of pliers are in a free state, the reset mechanism is adapted to reset the movable end to pull back the connecting rod.

4. The stapler according to claim 3, wherein The reset mechanism includes: female and male elastic pieces respectively located inside the movable end and the pair of pliers; A plurality of card holes are provided on the female elastic piece, and a card head is provided on the male elastic piece, and the card head is adapted to be inserted into the corresponding card hole to adjust the magnitude of the resilience.

5. The stapler according to claim 3 or 4, wherein The suturing mechanism further includes: a thread clamping and tensioning device; The thread clamping and tensioning device is adapted to fasten both ends of the suture so that the suture between the two thread slots is in a straightened state.

6. The stapler according to claim 5, wherein The thread clamping and tensioning device is installed on both sides of the top of the movable end; When the top of the movable end pulls the connecting rod back, the thread clamping and tensioning device moves away from the suture thread; The suture hook is of an arc-shaped structure, and the barbs are located on the outer arc surface thereof; and The depth of the barbs is not greater than the diameter of the suture thread, so that when the barbs hook the suture thread, the suture thread fills the barbs.

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