Puncture suspension device with positioning structure

Abstract

The invention provides a puncture suspension device with a positioning structure. The puncture suspension device mainly solves the technical problems that an existing puncture suspension device is too tedious in operation process, limited in use occasion and the like. The device comprises a puncture needle and a suspension assembly, the puncture needle is of a hollow straight tube needle structure and is used for puncturing skin and target tissue; the suspension assembly is located in the puncture needle and comprises a fixing piece and a suspension line which are sequentially connected from front to back. The fixing piece is arranged in the head of the puncture needle; the suspension line is of a parallel double-line structure, one end of the suspension line is connected with the middle of the fixing piece, and the other end of the suspension line extends out of the tail of the puncture needle. After puncture, the fixing piece can be pushed out, penetrates through the lower portion of the tissue and surrounds the tissue, then the fixing piece penetrates through the suspension line, the suspension line is tensioned, rapid suspension can be achieved, the wound to the skin is small, and the suspended tissue is free of wound.

Description

Technical Field

[0001] The present invention relates to a puncture suspension device for minimally invasive surgery, and particularly to a puncture suspension device with a positioning structure. 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 shows 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 patients, and the most ideal scar healing to obtain the best treatment effect.

[0003] Minimally invasive surgery generally needs to establish channels with the aid of puncture devices. To establish these channels, incisions larger than 3 mm need to be formed on the patient's body surface, and at the same time, laparoscopic surgical instruments are used to cooperate to traction and lift the viscera / tissues so that they are exposed within the surgical field. In addition, for relatively complex laparoscopic minimally invasive surgeries, they are generally completed by the surgeon and an assistant working together, and at most 2 assistants can be equipped to assist in completion, but a doctor can operate 2 instruments, and the quantity is limited. Therefore, how to fully expose the viscera in a narrow surgical space has always been a technical problem that surgeons are thinking about and waiting to break through.

[0004] Currently, many doctors choose to use a suture purse-string needle to suspend the target tissue in laparoscopic minimally invasive surgery. The specific operation method is to first straighten the suture needle, insert it into the abdominal cavity from the abdomen, suture the target viscera (at least sew two stitches to ensure reliable suture), then pierce the suture needle through the abdominal wall, and tie a knot outside the body, or tie a knot inside the body after suturing the viscera. This method can achieve the suspension of the viscera to a certain extent, thus facilitating the smooth progress of the surgery. However, its operation process is too cumbersome. Especially when piercing the suture needle out of the abdominal cavity, affected by the long rod and operation angle limitation of the laparoscopic instrument, a lot of force is required to complete it. In addition, this method is limited by the length of the suture needle and is only applicable to thinner patients. For relatively obese patients, due to the thick abdominal fat, the use effect is not ideal. In addition, for tissues / organs with a safe puncture structure on the epidermis but a puncture risk inside, such as the gallbladder, stomach, uterus, etc., there are also relatively large safety risks when using this method. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems that the existing puncture suspension device has a too cumbersome operation process and limited application scenarios, and to provide a puncture suspension device with a positioning structure.

[0006] To achieve the above object, the technical solution provided by the present invention is as follows:

[0007] A puncture suspension device with a positioning structure, characterized in that:

[0008] It includes a puncture needle and a suspension assembly;

[0009] The puncture needle is a hollow straight tube needle structure for puncturing the skin and the target tissue;

[0010] The suspension assembly is located inside the puncture needle and includes a fixing member and a suspension wire connected in sequence from front to back; the fixing member is arranged inside the head of the puncture needle; the suspension wire is a parallel double-wire structure, one end of which is connected to the middle of the fixing member, and the other end extends out from the tail of the puncture needle.

[0011] Furthermore, it further includes an inner core tube that can slide inside the puncture needle;

[0012] The inner core tube is a flexible or rigid hollow tube; the inner core tube is slidably sleeved on the suspension wire, and the rear end of the inner core tube extends out from the tail of the puncture needle.

[0013] Furthermore, it further includes an inner core surrounding tube that can slide inside the puncture needle;

[0014] The inner core surrounding tube is a flexible hollow tube; the inner core surrounding tube is slidably sleeved on the suspension wire and is located between the fixing member and the inner core tube.

[0015] Furthermore, the suspension wire is provided with 1 or N open segments, where N≥2; the open segment divides the suspension wire into 2 or N + 1 parallel segments; the open segment is for the fixing member to pass through.

[0016] Furthermore, it further includes at least 1 inner core surrounding tube and / or 1 inner core tube located inside the puncture needle;

[0017] The inner core surrounding tube is a flexible hollow tube; the inner core tube is a flexible or rigid hollow tube;

[0018] The inner core surrounding tube is sleeved on the parallel segment of the suspension wire and is located between the fixing member and the open segment or between two adjacent open segments;

[0019] The inner core tube is located behind the last open segment, and the rear end of the inner core tube extends out from the tail of the puncture needle.

[0020] Furthermore, the inner core tube is selected from a polytetrafluoroethylene tube or a stainless steel tube; the inner core surrounding tube is selected from a polytetrafluoroethylene tube; the open segment is circular or polygonal.

[0021] Furthermore, the number of the inner core surrounding tubes is 1 and is located between the fixing member and the open segment close to the fixing member.

[0022] Further, the fixing member is a hollow tube structure or a solid column structure;

[0023] A fixing hole is provided in the middle of the fixing member along the radial direction, and one end of the suspension line extends into the fixing hole from inside and is connected to the fixing member;

[0024] Alternatively, two fixing holes are symmetrically provided in the middle of the fixing member along the radial direction, and one end of the suspension line extends into the two fixing holes from inside respectively and is connected to the fixing member.

[0025] Further, the suspension line is one and is folded in half, and the free ends after folding are respectively connected to the fixing member;

[0026] Alternatively, the suspension lines are two and are arranged in parallel, and the same ends of the parallel arrangement are respectively connected to the fixing member.

[0027] Further, the suspension line is made of shape memory alloy, and the memory shape of the end connected to the fixing member is an L shape; when the suspension line pushes the fixing member to extend out from the head of the puncture needle, the suspension line restores its memory shape;

[0028] Alternatively, the suspension line is a plastic wire subjected to heat setting treatment.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] 1. A puncture suspension device with a positioning structure provided by the present invention includes a puncture needle and a suspension assembly, wherein the suspension assembly includes a fixing member and a suspension line connected in sequence from front to back. The suspension line is a parallel double-line structure. During use, the tissue is surrounded by the suspension line, and the fixing member is passed through between the suspension lines, so that the surrounding fixation of the target tissue can be realized. This method is simple to operate, has little trauma to the skin, and the suspended tissue is not traumatized.

[0031] 2. In a puncture suspension device with a positioning structure provided by the present invention, a sliding inner core tube is further provided in the puncture needle, and the inner core tube is slidably sleeved on the suspension line. The tissue is surrounded by the suspension line, then the fixing rod is passed through between the suspension lines, and the inner core tube is used for auxiliary locking, so that the surrounding fixation of the target tissue can be realized more firmly.

[0032] 3. In a puncture suspension device with a positioning structure provided by the present invention, a slidable inner core surrounding tube is further provided in the puncture needle, and the inner core surrounding tube is slidably sleeved on the suspension line and is located between the fixing member and the inner core tube. The target tissue is surrounded by the suspension line and the inner core surrounding tube, then the fixing rod is passed through between the suspension lines, and the inner core tube is used for auxiliary locking, thereby solving the problem of tissue cutting caused by the suspension line becoming tighter and tighter when suspending the target tissue.

[0033] 4. In the puncture suspension device with a positioning structure provided by the present invention, one or N opening sections can also be arranged on the suspension line for the quick passing of the fixing piece, thereby improving the puncture efficiency.

[0034] 5. In the puncture suspension device with a positioning structure provided by the present invention, on the basis of arranging the opening section on the suspension line, an inner core surrounding tube and an inner core tube can be added, and the surrounding length can be selected according to needs, so as to be applicable to the puncture suspension of target tissues of different sizes, and the application range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of Embodiment 1 of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the fixing piece extending out of the puncture needle in Embodiment 1 of the present invention;

[0037] Figure 3 It is a schematic diagram of the usage method of Embodiment 1 of the present invention;

[0038] Figure 4 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0039] Figure 5 It is a schematic diagram of the usage method of Embodiment 2 of the present invention;

[0040] Figure 6 It is a schematic structural diagram of Embodiment 3 of the present invention;

[0041] Figure 7 It is a schematic diagram of the usage method of Embodiment 3 of the present invention;

[0042] Figure 8 It is a schematic structural diagram of Embodiment 4 of the present invention;

[0043] Figure 9 It is a schematic structural diagram of the suspension assembly extending out of the puncture needle in Embodiment 4 of the present invention;

[0044] Figure 10 It is a schematic structural diagram of adding an inner core tube in Embodiment 4 of the present invention;

[0045] Figure 11 It is a schematic structural diagram of adding an inner core surrounding tube and an inner core tube in Embodiment 4 of the present invention;

[0046] Figure 12 It is a schematic diagram of the usage method of adding an inner core surrounding tube and an inner core tube in Embodiment 4 of the present invention.

[0047] The reference numerals are as follows:

[0048] 1 - Puncture needle, 2 - Fixing piece, 3 - Suspension wire, 4 - Inner core tube, 5 - Inner core surrounding tube, 6 - Opening section. Detailed implementation mode

[0049] To make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Those skilled in the art should understand that these implementation modes 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.

[0050] Embodiment 1

[0051] As Figure 1 shown, this embodiment provides a puncture suspension device with a positioning structure, including a puncture needle 1 and a suspension assembly.

[0052] The puncture needle 1 is a hollow straight tube needle structure for puncturing the skin and the target tissue. The puncture needle 1 is made of a rigid pipe material, preferably a round pipe, and can also be other concentric or non-concentric pipes of other shapes. The internal space of the puncture needle 1 should be able to accommodate the fixing piece 2 and enable the fixing piece 2 to slide along the inside of the puncture needle 1. At least one end of the puncture needle 1 is pointed, preferably made of stainless steel, and can also be other rigid materials.

[0053] The suspension assembly is located inside the puncture needle 1 and includes a fixing piece 2 and a suspension wire 3 connected in sequence from front to back; the fixing piece 2 is arranged inside the head of the puncture needle 1; the suspension wire 3 is a parallel double-wire structure, one end of which is connected to the middle part of the fixing piece 2, and the other end extends out from the tail of the puncture needle 1.

[0054] The fixing piece 2 of this embodiment is made of a rigid material, which is a hollow structure or at least one side is a hollow structure, and the outer contour is preferably circular, and can also be other shapes. A fixing hole is provided radially in the middle of the fixing piece 2, and one end of the suspension wire 3 extends into the fixing hole and is connected to the fixing piece 2. Or, two fixing holes can be symmetrically provided radially in the middle of the fixing piece 2, and one end of the suspension wire 3 extends into the two fixing holes respectively and is connected to the fixing piece 2. The fixing piece 2 should be connected to the suspension wire 3 without displacement when pulled forcefully through welding, bonding or mechanical friction.

[0055] The suspension wire 3 can be one and folded in half, and the free ends after folding are respectively connected to the fixing piece 2.

[0056] Or, the suspension wire 3 can also be two and arranged in parallel, and the same ends arranged in parallel are respectively connected to the fixing piece 2.

[0057] The suspension wire 3 of this embodiment is made of a shape memory alloy material, preferably a nickel-titanium alloy wire, and the memory shape of the connection end with the fixing piece 2 is an L shape; when the suspension wire 3 pushes the fixing piece 2 to extend out from the head of the puncture needle 1, the suspension wire 2 restores its memory shape and is perpendicularly connected to the fixing piece 2 ( Figure 2as shown

[0058] In some embodiments, the suspension thread 3 can also be a plastic filament after heat setting. One end of the suspension thread 3 connected to the fixing member 2 is shaped into a curved shape, so that the suspension thread 3 can deviate from its main body extension line after being released from the restraint of the puncture needle 1 at the head.

[0059] such as Figure 3 as shown, the usage method of this embodiment is as follows:

[0060] (1). Pass the puncture needle 1 through the skin and then bypass the internal tissue to be fixed.

[0061] (2). Push out the fixing member 2.

[0062] (3). Withdraw the puncture needle 1.

[0063] (4). Use pliers to pass through above the tissue to be fixed and between the two suspension threads 3, bypass the front of the tissue to be fixed and then clamp the fixing member 2, and pull the fixing member 2 to pass through between the two suspension threads 3 above the tissue.

[0064] (5). Lift the two suspension threads 3 outside the body to tighten them, thereby completing the circumferential suspension fixation of the target tissue.

[0065] The puncture suspension device of this embodiment has the advantages of small skin trauma and no trauma to the suspended tissue by surrounding the tissue with double filaments.

[0066] Embodiment Two

[0067] such as Figure 4 as shown, compared with Embodiment One, this embodiment further includes an inner core tube 4 that can slide inside the puncture needle 1. The inner core tube 4 is a flexible or rigid hollow tube. The inner core tube 4 is slidably sleeved on the suspension thread 3, and the rear end of the inner core tube 4 extends out of the tail of the puncture needle 1.

[0068] It should be noted here that there is no friction between the outer wall of the inner core tube 4 and the inner wall of the puncture needle 1, or the inner core tube 4 and the puncture needle 1 generally do not directly contact when moving relative to each other, so as to ensure that when the puncture needle 1 is withdrawn during use, it will not take away the inner core tube 4.

[0069] The inner core tube 4 of this embodiment is preferably a polytetrafluoroethylene flexible tube or a stainless steel rigid tube.

[0070] such as Figure 5 as shown, the usage method of this embodiment is as follows:

[0071] (1). Pass the puncture needle 1 through the skin and then bypass the internal tissue to be fixed.

[0072] (2). Push out the fixing member 2.

[0073] (3) Withdraw the puncture needle 1 and retain the inner core tube 4.

[0074] (4) Using pliers, pass through above the tissue to be fixed, below the inner core tube 4, and between the two suspension threads 3, then bypass the front of the tissue to be fixed and clamp the fixing member 2, and pull the fixing member 2 to pass through between the two suspension threads 3 above the tissue.

[0075] (5) Lift the two suspension threads 3 outside the body and tighten them, and push the inner core tube 4 downward until the target suspended tissue is fixed, thus completing the circumferential fixation.

[0076] In this embodiment, the tissue is circumferentially surrounded by a double wire and assisted by the inner core tube 4 for locking. Compared with Embodiment 1, the locking is more firm.

[0077] Embodiment 3

[0078] As Figure 6 shown, compared with Embodiment 2, this embodiment further includes an inner core circumferential tube 5 that is located inside the puncture needle 1 and can slide.

[0079] The inner core circumferential tube 5 is a flexible hollow tube; the inner core circumferential tube 5 is slidably sleeved on the suspension thread 3 and is located between the fixing member 2 and the inner core tube 4. The inner core circumferential tube 5 is preferably a polytetrafluoroethylene tube.

[0080] As Figure 7 shown, the usage method of this embodiment is as follows:

[0081] (1) Pass the puncture needle 1 through the skin and then bypass the tissue in the body to be fixed.

[0082] (2) Push out the fixing member 2.

[0083] (3) Withdraw the puncture needle 1 and retain the inner core circumferential tube 5 and the inner core tube 4.

[0084] (4) Using pliers, pass through above the tissue to be fixed, below the inner core tube 4, above the inner core circumferential tube 5, and between the two suspension threads 3, then bypass the front of the tissue to be fixed and clamp the fixing member 2, and pull the fixing member 2 to pass through between the two suspension threads 3 above the tissue. At the same time, push the inner core circumferential tube 5 to make it located below the tissue and surround it.

[0085] (5) Lift the two suspension threads 3 outside the body and tighten them, and then push the inner core tube 4 downward to be close to the fixing member 4, thus completing the circumferential fixation.

[0086] In this embodiment, the tissue is circumferentially surrounded by a double wire plus the inner core circumferential tube 5, and assisted by the inner core tube 4 for locking, solving the problem that the puncture suspension device in Embodiment 2 becomes tighter and tighter and may cause tissue cutting.

[0087] Embodiment 4

[0088] As Figure 8 shown, compared with the first embodiment, one or N opening segments 6 are preset on the suspension wire 3 in this embodiment, where N≥2, and the number of the opening segments 6 can be set according to the thickness of the tissue to be surrounded, that is, the corresponding number of the opening segments 6 is set according to different surrounding lengths. The opening segments 6 divide the suspension wire 3 into two or N+1 parallel segments; after the opening segments 6 extend out of the puncture needle 1, they are circular or polygonal (as shown in 9), which are mainly used for the passing of the fixing member 2 and the pliers.

[0089] Combined with Figure 10 、 Figure 11 shown, at least one inner core surrounding tube 5 and / or one inner core tube 4 located in the puncture needle 1 can also be provided in this embodiment. Among them, the inner core surrounding tube 5 is a flexible hollow tube; the inner core tube 4 is a flexible or rigid hollow tube.

[0090] The inner core surrounding tube 5 is sleeved on the parallel segment of the suspension wire 3, and is located between the fixing member 2 and the opening segment 6 or between two adjacent opening segments 6, while the inner core tube 4 is generally located behind the last opening segment 6, and the rear end of the inner core tube 4 extends out of the tail of the puncture needle 1.

[0091] The inner core tube 4 of this embodiment is preferably a polytetrafluoroethylene hose or a stainless steel hard tube, and the inner core surrounding tube 5 is preferably a polytetrafluoroethylene tube.

[0092] Based on the above description, there are three usage methods in this embodiment, specifically:

[0093] When the inner core surrounding tube 5 and the inner core tube 4 are not selected ( Figure 8 shown), its usage method is the same as that of the first embodiment, but the efficiency of surrounding the tissue is higher.

[0094] When the inner core surrounding tube 5 is not selected and the inner core tube 4 is selected ( Figure 10 shown), its usage method is the same as that of the second embodiment.

[0095] When both the inner core surrounding tube 5 and the inner core tube 4 are selected ( Figure 11 shown), its usage method is similar to that of the third embodiment. Combined with Figure 12 , the usage method is specifically described.

[0096] (1). Pass the puncture needle 1 through the skin and then bypass the internal tissue to be fixed.

[0097] (2). Push out the fixing member 2.

[0098] (3). After removing the puncture needle 1, retain the inner core surrounding tube 5 and the inner core tube 4.

[0099] (4) For thinner tissues, use pliers to pass through above the tissue to be fixed, below the inner core tube 4 / inner core surrounding tube 5, and through the front opening section 6 of the two suspension threads 3, then bypass the front of the tissue to be fixed and clamp the fixing part 2. Pull the fixing part 2 through the corresponding opening section 6 on the two suspension threads 3 above the tissue (generally, it can pass through the slightly front opening section 6). At the same time, push the inner core surrounding tube 5 to make it located below the tissue and surround it. Finally, lift and tighten the two suspension threads 3 outside the body, and then push the inner core tube 4 downward to the fixing part 2 to complete the surrounding fixation.

[0100] (5) For thicker tissues, use pliers to pass through above the tissue to be fixed, below the inner core tube 4 / inner core surrounding tube 5, and through the rear opening section 6 of the two suspension threads 3, then bypass the front of the tissue to be fixed and clamp the fixing part 2. Pull the fixing part 2 through the corresponding opening section 6 on the suspension thread 3 above the tissue. At the same time, push the corresponding inner core surrounding tube 5 to make it located below the tissue and surround it. Finally, lift and tighten the two suspension threads 3 outside the body, and then push the inner core tube 4 downward to the fixing part 2 to complete the surrounding fixation.

[0101] In this embodiment, through the double-wire plus multi-stage opening and closing structure, the optional inner core surrounding tube 5 and inner core tube 4 are used to surround the tissue, which solves the problem that the surrounding length cannot be selected as needed in the first, second, and third embodiments.

[0102] 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 described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present invention.

Claims

1. A puncture suspension device with a positioning structure, characterized in that: It includes a puncture needle (1) and a suspension assembly; The puncture needle (1) is a hollow straight tube needle structure for puncturing the skin and target tissue; The suspension assembly is located inside the puncture needle (1) and includes a fixing member (2) and a suspension wire (3) connected in sequence from front to back; the fixing member (2) is arranged inside the head of the puncture needle (1); the suspension wire (3) is a parallel double-wire structure, one end of which is connected to the middle of the fixing member (2), and the other end extends out from the tail of the puncture needle (1).

2. The puncture suspension device with a positioning structure according to claim 1, characterized in that: It further includes an inner core tube (4) that can slide inside the puncture needle (1); The inner core tube (4) is a flexible or rigid hollow tube; the inner core tube (4) is slidably sleeved on the suspension wire (3) and the rear end extends out from the tail of the puncture needle (1).

3. The puncture suspension device with a positioning structure according to claim 2, characterized in that: It further includes an inner core surrounding tube (5) that can slide inside the puncture needle (1); The inner core surrounding tube (5) is a flexible hollow tube; the inner core surrounding tube (5) is slidably sleeved on the suspension wire (3) and is located between the fixing member (2) and the inner core tube (4).

4. The puncture suspension device with a positioning structure according to claim 1, characterized in that: The suspension wire (3) is provided with 1 or N opening segments (6), where N≥2; the opening segment (6) divides the suspension wire (3) into 2 or N + 1 parallel segments; the opening segment (6) is for the fixing member (2) to pass through.

5. The puncture suspension device with a positioning structure according to claim 4, characterized in that: It further includes at least 1 inner core surrounding tube (5) and / or 1 inner core tube (4) located inside the puncture needle (1); The inner core surrounding tube (5) is a flexible hollow tube; the inner core tube (4) is a flexible or rigid hollow tube; The inner core surrounding tube (5) is sleeved on the parallel segment of the suspension wire (3) and is located between the fixing member (2) and the opening segment (6) or between two adjacent opening segments (6); The inner core tube (4) is located behind the last opening segment (6) and the rear end extends out from the tail of the puncture needle (1).

6. The puncture suspension device with a positioning structure according to claim 5, characterized in that: The inner core tube (4) is selected from a polytetrafluoroethylene tube or a stainless steel tube; The inner core surrounding tube (5) is selected from a polytetrafluoroethylene tube; The opening segment (6) is circular or polygonal.

7. The puncture suspension device with a positioning structure according to claim 5, characterized in that: The number of the inner core surrounding tubes (5) is 1 and is located between the fixing member (2) and the opening segment (6) closest to the fixing member (2).

8. The puncture suspension device with a positioning structure according to any one of claims 1 to 7, characterized in that: The fixing member (2) is a hollow tube structure or a solid column structure; A fixing hole is provided in the middle of the fixing member (2) along the radial direction, and one end of the suspension wire (3) extends into the fixing hole and is connected to the fixing member (2); Alternatively, two fixing holes are symmetrically arranged along the radial direction in the middle of the fixing member (2), and one end of the suspension wire (3) extends into the two fixing holes respectively and is connected to the fixing member (2).

9. The puncture suspension device with a positioning structure according to claim 8, wherein: The suspension wire (3) is one and is arranged in a folded manner, and the free ends after folding are respectively connected to the fixing member (2); Alternatively, the suspension wire (3) is two and is arranged side by side, and the same ends arranged side by side are respectively connected to the fixing member (2).

10. The puncture suspension device with a positioning structure according to claim 9, wherein: The suspension wire (3) is made of shape memory alloy, and the memory shape of the end connected to the fixing member (2) is an L shape; after the suspension wire (3) pushes the fixing member (2) to extend out from the head of the puncture needle (1), the suspension wire (2) restores its memory shape; Alternatively, the suspension wire (3) is a plastic wire subjected to heat setting treatment.

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