Deformable puncture suture suspension device

Abstract

The invention provides a deformable puncture suture suspension device which is used for solving the technical problem that an existing puncture needle has a large safety risk during puncture. The device comprises a puncture needle, a deformable puncture assembly and a suspension assembly which are sequentially arranged from outside to inside in a sleeving mode. The puncture needle is of a hollow straight tube needle structure; the deformable puncture assembly comprises a deformable needle tube and a push-pull tube which are sequentially communicated from front to back. The deformable needle tube is of a hollow straight tube needle structure in the initial state and is made of memory alloy materials, the memory shape of the middle of the deformable needle tube is arc, the front end of the deformable needle tube is located in the head of the puncture needle, the rear end of the deformable needle tube is connected with the front end of the push-pull tube, and the rear end of the push-pull tube extends out of the tail of the puncture needle. The suspension assembly comprises a stop lever and a suspension line which are sequentially connected from front to back; the stop lever is positioned in the front end of the deformable needle tube; the front end of the suspension line is connected with the middle of the stop lever, and the rear end extends out of the rear end of the push-pull tube; the suspension line is a memory alloy line, and the memory shape of the end, connected with the stop lever, of the suspension line is L-shaped.

Description

Technical Field

[0001] The present invention relates to a puncture device for minimally invasive surgery, and particularly to a deformable puncture suture suspension device. Background Art

[0002] Compared with traditional open surgery, minimally invasive surgery has the advantages of small incisions, less trauma, significantly reduced blood loss, rapid postoperative recovery, and shortened hospital stay of patients. Currently, it has become an inevitable trend in the development of surgery. With the development of technology, minimally invasive surgery has also transitioned from multi-port laparoscopic surgery to single-port laparoscopic surgery and robot-assisted surgery, which further indicates that minimally invasive surgery aims to treat with the least damage to tissues and organs (the damage includes the trauma caused by surgical incisions, surgical paths, and the establishment of surgical fields), with the lightest systemic stress response, the best internal environment stability state of the patient, and the most ideal scar healing to obtain the best treatment effect.

[0003] Minimally invasive surgery generally needs to establish channels with the help of puncture devices, and these channels generally form incisions larger than 3 mm on the patient's body surface. Currently, common puncture devices on the market are mostly puncture needles with built-in suspension devices, where the puncture needles are straight. When puncturing and suspending the target tissue, restricted by the locking of the puncture point position on the body surface, the puncture position of the puncture needle on the target tissue is limited. When facing a target tissue with an internal cavity, to make the release process of the suspension device visible, the entire tissue needs to be penetrated to release the suspension device to suspend the corresponding target tissue. However, when facing tissues / organs with a safe puncture structure on the epidermis but a puncture risk inside, such as the gallbladder, stomach, uterus, etc., using this straight puncture needle has a relatively high safety risk. Summary of the Invention

[0004] The object of the present invention is to solve the technical problem that the existing puncture needles have a relatively high safety risk when facing tissues / organs with a safe puncture structure on the epidermis but a puncture risk inside, and to provide a deformable puncture suture suspension device.

[0005] To achieve the above object, the technical solution provided by the present invention is as follows:

[0006] A deformable puncture suture suspension device, characterized in that:

[0007] It includes a puncture needle, a deformable puncture assembly, and a suspension assembly that are sleeved in sequence from outside to inside;

[0008] The puncture needle has a hollow straight tube needle structure and is used for puncturing the skin;

[0009] The deformable puncture assembly includes a deformable needle tube and a push-pull tube that are connected in series from front to back; the initial state of the deformable needle tube is a hollow straight needle structure for puncturing the epidermis of the target tissue; the deformable needle tube is made of a shape memory alloy material and the memory shape of its middle part is an arc; the front end of the deformable needle tube is located inside the head of the puncture needle, the rear end is connected to the front end of the push-pull tube, and the rear end of the push-pull tube extends out of the tail of the puncture needle.

[0010] The suspension assembly includes a stop rod and a suspension wire that are connected in series from front to back; the stop rod is located inside the front end of the deformable needle tube and is parallel to the deformable needle tube; the front end of the suspension wire is connected to the middle part of the stop rod, and the rear end extends out of the rear end of the push-pull tube; the suspension wire is a shape memory alloy wire, and the memory shape of its connection end with the stop rod is an L shape.

[0011] When the push-pull tube pushes the deformable needle tube out of the head of the puncture needle, the deformable needle tube restores its memory shape; when the suspension wire pushes the stop rod out of the front end of the deformable needle tube, the suspension wire restores its memory shape and is perpendicular to the stop rod.

[0012] Further, the rear end of the deformable needle tube and the front end of the push-pull tube are connected through an adapter tube.

[0013] Further, the adapter tube is a flexible tube and can be stacked and unfolded along the axial direction.

[0014] Further, the adapter tube is a metal bellows or a plastic bellows.

[0015] Further, the adapter tube is a rigid plastic straight tube.

[0016] Further, the puncture needle is made of stainless steel and its outer diameter is less than or equal to 2 mm.

[0017] Further, the stop rod is made of hollow metal material, and one end of the suspension wire extends into the stop rod and is connected to the stop rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. A deformable puncture suture suspension device provided by the present invention includes a puncture needle, a deformable puncture assembly, and a suspension assembly. Among them, the puncture needle is used for puncturing the skin; the deformable puncture assembly is located inside the puncture needle and includes a deformable needle tube and a push-pull tube that are connected in series from front to back and are used for puncturing the epidermis of the target tissue; the suspension assembly is located inside the deformable puncture assembly and includes a stop rod and a suspension wire and is used for realizing the suspension of the target tissue. With the cooperation of each component, the puncture and suspension of the target tissue can be realized quickly and safely, thus facilitating the smooth progress of the operation.

[0020] 2. In the deformable puncture suture suspension device provided by the present invention, the deformable needle tube is connected to the push-pull tube through a connecting tube. The connecting tube can be a flexible tube and can be stacked and unfolded along the axial direction, thereby increasing the movement space of the deformable puncture assembly.

[0021] 3. In the deformable puncture suture suspension device provided by the present invention, the connecting tube can also be a rigid plastic straight tube, thereby extending the length of the rear end of the deformable needle tube and facilitating the smooth progress of the puncture or suture process.

[0022] 4. In the deformable puncture suture suspension device provided by the present invention, the outer diameter of the puncture needle is less than or equal to 2 mm, and the surgical wound is small, which is beneficial to postoperative recovery.

[0023] 5. The deformable puncture suture suspension device provided by the present invention is applicable to patients of various body types and does not occupy the instrument channel, with high versatility.

[0024] 6. The deformable puncture suture suspension device provided by the present invention is different from the straight needle puncture suspension device on the market, increasing the advantages of suture suspension. It can be suspended at any position according to the surgical needs, and no manual management or intervention is required after suspension, thus reducing the manpower occupation.

[0025] 7. In the deformable puncture suture suspension device provided by the present invention, the process of pushing and releasing the suspension assembly is relatively simple, without the need for suturing, and the structure is firm and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the puncture needle in Embodiment 1 of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the suspension assembly in the initial state in Embodiment 1 of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the suspension assembly after release in Embodiment 1 of the present invention;

[0030] Figure 5 It is a state reference diagram of the deformable needle tube and the suspension assembly after release in Embodiment 1 of the present invention;

[0031] Figure 6 It is a state reference diagram of the suspension assembly suspending and fixing the target tissue in Embodiment 1 of the present invention;

[0032] Figure 7 It is another state reference diagram of the use of Embodiment 1 of the present invention;

[0033] Figure 8 It is a schematic structural diagram of the second embodiment of the present invention;

[0034] Figure 9 It is a schematic structural diagram of the deformable puncture assembly in the second embodiment of the present invention;

[0035] Figure 10 It is a schematic structural diagram after the release of the deformable needle tube and the suspension assembly in the second embodiment of the present invention.

[0036] The reference numerals are as follows:

[0037] 1 - puncture needle, 2 - deformable needle tube, 3 - push - pull tube, 4 - stop bar, 5 - suspension wire, 6 - adapter tube. Detailed implementation manners

[0038] To make the objectives, advantages and features of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present invention, and the purpose is not to limit the protection scope of the present invention.

[0039] In the traditional straight puncture needle, both the body surface puncture point and the tissue puncture point are on the line constrained by the puncture needle, and the direction can only be from the body surface to the tissue, and it must penetrate the tissue to complete. Based on this, a deformable needle tube system is nested inside the puncture needle of the present invention. The body surface puncture point and the tissue puncture point are respectively borne by the puncture needle and the deformable needle tube system, and the deformable needle tube changes from a straight line to a curve, so that puncture suspension in more directions and more positions can be realized, and the puncture depth of the suspended tissue can also be selectively controlled.

[0040] Embodiment 1

[0041] As Figure 1 shown, a deformable puncture and suture suspension device provided in this embodiment includes a puncture needle 1, a deformable puncture assembly, and a suspension assembly that are sleeved from outside to inside in sequence.

[0042] As Figure 2 shown, the puncture needle 1 has a hollow straight - tube needle structure and is used for puncturing the skin. The puncture needle 1 in this embodiment is a stainless - steel percutaneous puncture needle with an outer diameter ≤ 2 mm, and the puncture needle 1 provides a channel for the deformable needle tube system to enter the surgical space.

[0043] Combined with Figure 1 and Figure 3As shown in the figure, the deformable puncture assembly includes a deformable needle tube 2 and a push-pull tube 3 that are connected in sequence from front to back and communicate with each other, providing an internal passage for the suspension assembly to pass through. The initial state of the deformable needle tube 2 is a hollow straight needle structure for puncturing the epidermis of the target tissue. The deformable needle tube 2 is made of a shape memory alloy material, and the memory shape in the middle is an arc. In this embodiment, the memory shape of the deformable needle tube 2 is a conventional medical arc-shaped suture needle, and both ends are straight and extend a certain length respectively. Among them, the straight shape at the needle tip provides space for the built-in stop rod 4, and the straight shape design at the tail end of the needle tube aims to increase the stability of the operation when it is retracted into the puncture needle 1.

[0044] The front end of the deformable needle tube 2 is located inside the head of the puncture needle 1, and the rear end is connected to the front end of the push-pull tube 3. The rear end of the push-pull tube 3 extends out of the tail of the puncture needle 1. When the deformable needle tube 2 is pushed out of the head of the puncture needle 1 through the push-pull tube 3, the deformable needle tube 2 restores its memory shape due to its material properties in the body temperature environment.

[0045] Combined with Figure 3 and Figure 4 As shown in the figure, the suspension assembly includes a stop rod 4 and a suspension wire 5 that are connected in sequence from front to back. The stop rod 4 is a hollow metal tube, which is located inside the front end of the deformable needle tube 2 and is parallel to the deformable needle tube 2. The front end of the suspension wire 5 extends into the stop rod 4 from the middle of the stop rod 4 and is connected to the stop rod 4, and the rear end extends out of the rear end of the push-pull tube 3. The suspension wire 5 is a shape memory alloy wire, and the memory shape of the connection end with the stop rod 4 is an L shape. When the suspension wire 5 pushes the stop rod 4 out of the front end of the deformable needle tube 2, the suspension wire 5 automatically pulls the stop rod to rotate in the body temperature environment, restores its memory shape and is perpendicularly connected to the stop rod 4, making the whole suspension assembly in a T shape ( Figure 4 as shown in the figure).

[0046] In this embodiment, both the deformable needle tube 2 and the suspension wire 5 can be selected from titanium-nickel shape memory alloy materials. Since the titanium-nickel shape memory alloy is a high-performance biological material and is very safe to use in the human body, the safety of the surgical process can be improved; at the same time, this material also has very good elasticity, and its shape is easy to process and can be shaped according to design requirements, so as to ensure that its structural shape meets the use requirements.

[0047] In this embodiment, the deformable puncture assembly is nested inside the puncture needle 1. The body surface puncture point and the tissue puncture point are respectively borne by the puncture needle 1 and the deformable needle tube 2, and the middle part of the deformable needle tube 2 can change from a straight line to a curve, so as to realize puncture suspension in more directions and more positions, and the puncture depth of the suspended tissue can also be selectively controlled.

[0048] Taking the cholecystectomy as an example, the usage method of this embodiment will be described in detail below.

[0049] When performing a cholecystectomy, a puncture needle 1 is used to enter the abdominal cavity through the patient's skin. The push-pull tube 3 is pushed to eject the deformable needle tube 2 from the puncture needle 1. The operator can then use forceps to grip the deformable needle tube 2 and puncture / suture the target organ. When puncturing, the arc-shaped design of the deformable needle tube 2 can be used to simply and quickly penetrate the surface structure of the organ without damaging its internal tissues, thereby reducing the trauma to the organ. After the puncture is completed, the suspension assembly is ejected. When the stop rod 4 completely extends out of the deformable needle tube 2, the suspension wire 5 returns to its memory shape and forms a T shape with the stop rod 4. At this time, the stop rod 4 blocks outside the puncture exit, and suspension can be achieved, as Figure 5 shown.

[0050] After the release of the suspension assembly is completed, the push-pull tube 3 is pulled. First, the deformable needle tube 2 is retracted into the puncture needle 1, and then the puncture needle 1 and the deformable puncture assembly (i.e., the deformable needle tube 2 and the push-pull tube 3) are removed together, leaving only the suspension assembly (i.e., the stop rod 4 and the suspension wire 5). The tail of the suspension wire 5 is pulled. When the suspension height meets the requirements, the suspension wire 5 just exposed on the body surface is clamped with a needle holder, and the fixation of the suspension wire 5 on the body surface can be completed ( Figure 6 shown). After fixation, the suspension assembly does not require manual management or intervention.

[0051] After the operation is completed, the suspension wire 5 is loosened, and the stop rod 4 is pulled to remove the stop rod 4 and the suspension wire 5 together.

[0052] Figure 7 Another usage method of this embodiment is shown. After the suspension is completed, the entire target tissue can be stably suspended to the corresponding height, facilitating the smooth progress of the operation.

[0053] Embodiment 2

[0054] As Figure 8 shown, compared with Embodiment 1, the rear end of the deformable needle tube 2 in this embodiment is connected to the front end of the push-pull tube 3 through an adapter tube 6.

[0055] As Figure 9 and Figure 10 shown, the adapter tube 6 is a flexible tube and can be stacked and unfolded axially. The flexible tube is made of a polymer material. The flexible tube is pre-stacked and installed in the puncture needle 1, which is convenient for the push-pull tube 3 to push the entire deformable puncture assembly, so that the deformable needle tube 2 protrudes from the head of the puncture needle 1. When the operator grips the deformable needle tube 2 and pulls out the flexible tube, the stacked part of the flexible tube extends axially, which is convenient for the operator to grip the deformable needle tube 2 and then arbitrarily select the suture / puncture position in the cavity.

[0056] The adapter tube 6 of this embodiment is selected as a metal corrugated tube or a plastic corrugated tube. After the suspension assembly is released, the operator can use a needle holder to clamp the part of the flexible tube containing the suspension wire 5 on the body surface, thereby fixing the suspension wire 5 on the body surface.

[0057] Embodiment III

[0058] Compared with Embodiment I, in this embodiment, the rear end of the deformable syringe tube 2 and the front end of the push-pull tube 3 are connected through an adapter tube 6. Among them, the adapter tube 6 is a rigid plastic straight tube, and materials such as TPU and PTFE can be selected.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present invention.

Claims

1. A deformable puncture suture suspension device, characterized in that: It includes a puncture needle (1), a deformable puncture assembly, and a suspension assembly that are sleeved from outside to inside in sequence; The puncture needle (1) is a hollow straight tube needle structure for puncturing the skin; The deformable puncture assembly includes a deformable needle tube (2) and a push-pull tube (3) that are connected in sequence from front to back; the initial state of the deformable needle tube (2) is a hollow straight tube needle structure for puncturing the epidermis of the target tissue; the deformable needle tube (2) is made of a shape memory alloy material and the memory shape in the middle is an arc. The front end of the deformable needle tube (2) is located inside the head of the puncture needle (1), and the rear end is connected to the front end of the push-pull tube (3). The rear end of the push-pull tube (3) extends out of the tail of the puncture needle (1); The suspension assembly includes a stop rod (4) and a suspension wire (5) that are connected in sequence from front to back; the stop rod (4) is located inside the front end of the deformable needle tube (2) and is parallel to the deformable needle tube (2); the front end of the suspension wire (5) is connected to the middle of the stop rod (4), and the rear end extends out of the rear end of the push-pull tube (3); the suspension wire (5) is a shape memory alloy wire, and the memory shape of the connection end with the stop rod (4) is an L shape; When the push-pull tube (3) pushes the deformable needle tube (2) out of the head of the puncture needle (1), the deformable needle tube (2) restores its memory shape; When the suspension wire (5) pushes the stop rod (4) out of the front end of the deformable needle tube (2), the suspension wire (5) restores its memory shape and is perpendicular to the stop rod (4).

2. The deformable puncture suture suspension device according to claim 1, characterized in that: The rear end of the deformable needle tube (2) is connected to the front end of the push-pull tube (3) through an adapter tube (6).

3. The deformable puncture suture suspension device according to claim 2, characterized in that: The adapter tube (6) is a flexible tube and can be stacked and unfolded along the axis.

4. The deformable puncture suture suspension device according to claim 3, characterized in that: The adapter tube (6) is a metal bellows or a plastic bellows.

5. The deformable puncture suture suspension device according to claim 2, characterized in that: The adapter tube (6) is a rigid plastic straight tube.

6. The deformable puncture suture suspension device according to claim 1, characterized in that: The puncture needle (1) is made of stainless steel, and its outer diameter is less than or equal to 2 mm.

7. The deformable puncture suture suspension device according to claim 6, characterized in that: The stop rod (4) is made of hollow metal, and one end of the suspension wire (5) extends into the stop rod (4) and is connected to the stop rod (4).

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