Loop and wire surgical instrument

Abstract

The present invention relates to the field of medical device technology, and specifically to a loop-and-wire surgical instrument. This type of loop-and-wire surgical instrument comprises a needle shaft, a needle core, a lead wire, and a ligature. The needle shaft comprises a hollow rod body, one end of which is a puncture end for puncturing the abdominal wall. The rod body is provided with a threading hole. One end of the lead wire is provided with a coil. The needle core is inserted into the needle shaft. When the needle core passes through the threading hole, it penetrates into the coil to fix the lead wire to the needle shaft. The diameter of the ligature is smaller than the inner diameter of the needle shaft. The ligature can be inserted into the needle shaft and out of the threading hole. The loop-and-wire surgical instrument provided by the present invention has a simple structure. Both the needle shaft and the needle core are hookless designs, ensuring that the abdominal wall is not easily scratched during operation. When used, the abdominal wall only needs to be punctured once. The ligature is brought out of the abdominal wall by using the coiled wire to wrap the wire, replacing the original operation method of using a hook to hook the wire. It is more convenient and reliable and prevents tissue from being hooked.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a loop-and-wire surgical instrument. Background Art

[0002] A hernia occurs when an organ or tissue in the body moves from its normal anatomical position and enters another location through a congenital or acquired weakness, defect, or opening. Common hernias include umbilical hernia, direct inguinal hernia, indirect hernia, incisional hernia, surgically recurrent hernia, linea alba hernia, and femoral hernia. Current laparoscopic pediatric hernia surgery requires two incisions and punctures to establish two access channels. A hernia needle is inserted through a small skin incision at the top of the internal ring opening, puncturing the abdominal wall. A threaded needle is then inserted into the abdominal wall with thread, leaving a ligature inside. After the needle is withdrawn from the body, another hooked needle is used to re-puncture the abdominal wall and remove the ligature from the anterior abdominal wall space outside the internal ring opening to close the hernial ring. However, this technique has several drawbacks. It can easily damage the spermatic cord, leading to maldevelopment. It also requires puncturing the abdominal wall, increasing the risk of local injury. Furthermore, the two punctures required are technically demanding and result in severe postoperative pain for the patient.

[0003] To solve the above problems, the invention patent with patent number CN201821688314.5 discloses a pediatric hernia guide needle that does not require abdominal insertion, including a pressing device and a puncture device, wherein the pressing device includes a button and a pull-wire needle with an arc-shaped hook, and the puncture device includes a handle and a hollow puncture needle, wherein the puncture needle is fixedly mounted on the handle, and the handle is provided with a mounting groove for movably mounting the button; the pull-wire needle is located inside the puncture needle, and the end of the pull-wire needle that is not provided with an arc-shaped hook extends into the handle and is fixedly connected to the button. This hernia needle can achieve a single puncture. During the operation, the patient's abdominal wall is peeled off by the front end of the puncture needle, and the ligature is found using the hook. The guide needle is withdrawn to the top of the inner ring opening (still kept in the anterior abdominal wall space), and the same method is used to sneak through the outer half circle of the inner ring opening to the bottom of the inner ring opening. Driven by the elastic member, the ligature is brought back to the inside of the puncture needle through the hook, the puncture needle is withdrawn, the ligature is taken out and tied at the hernia position to complete the operation. This method can achieve a single puncture, but the process of hooking the ligature with a hook needle is difficult, the hook is difficult, and the hook is easy to fall off, resulting in ligation failure. Repeated puncture increases surgical complications and prolongs the operation time. In addition, for a considerable number of children, the vas deferens and spermatic cord are difficult to bypass, and additional operation holes are needed to help pull the abdominal wall to increase the anterior abdominal wall operation space, thereby increasing the trauma of the children, and multiple operation holes affect the appearance. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a loop-and-wire surgical instrument that only requires one puncture and is easy to operate.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a loop-and-wire surgical instrument, characterized in that it includes a needle rod, a needle core, and a lead wire. The needle rod includes a hollow rod body, one end of the rod body is a puncture end for puncturing the abdominal wall, a threading hole is provided on the rod body, and a coil is provided at one end of the lead wire. The needle core can be inserted into the needle rod, and when the needle core passes through the threading hole, it penetrates into the coil to fix the lead wire to the needle rod.

[0006] Furthermore, the puncture end is a structure in which the rod body is bent to one side.

[0007] Furthermore, the angle between the bent portion of the puncture end and the axis of the rod body is 10-30 degrees.

[0008] Furthermore, the threading hole is provided on the rod wall at or around the bending part between the rod body and the puncture end.

[0009] Furthermore, a gripping portion is provided on the needle rod, and the gripping portion is arranged at the tail end of the needle rod which is different from the puncture end.

[0010] Furthermore, a limiting portion is provided at one end of the needle core, and the limiting portion is detachably connected to the gripping portion when the needle core is inserted into the needle rod.

[0011] Furthermore, corresponding card slots and card blocks are respectively provided on the contact surfaces of the limiting portion and the gripping portion for detachable connection.

[0012] Furthermore, the diameter of the needle rod is 1.5-3 mm, the inner diameter of the lumen is 1.2-2.5 mm, and the length of the puncture end is 1-2 cm.

[0013] Furthermore, the circumference of the lead wire coil is 1.5 cm to 5 cm.

[0014] Furthermore, it also includes a ferrule, which is connected to the lead wire at one end away from the lead coil. The ferrule can be slidably mounted outside the needle rod along the needle rod, and the ferrule tightens or loosens the lead wire when the needle rod slides.

[0015] From the description of the present invention, it can be seen that the loop-and-wire surgical instrument provided by the present invention fixes the lead wire on the needle rod through the needle core, and releases the lead wire when the needle core is separated from the rod body. Its structure is simple, and both the needle rod and the needle core are hook-free designs, ensuring that the abdominal wall is not easily scratched during operation, and only one puncture of the abdominal wall is required during use; the threading hole of the present invention facilitates the passage of the ligature wire, and the ligature wire is brought out of the abdominal wall by using a coiled wire, replacing the original operation method of using a hook to hook the wire, which is more convenient and reliable and prevents tissue from being hooked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the needle rod of the loop-and-wire surgical instrument;

[0017] Figure 2 This is a schematic diagram of the connection between the needle rod, needle core and lead wire of the loop-and-wire surgical instrument;

[0018] Figure 3 for Figure 2 Enlarged view of the middle M;

[0019] Figure 4 This is a schematic diagram of the structure of the loop-and-wire surgical instrument when the lead wire is released;

[0020] Figure 5 It is a three-dimensional schematic diagram of a loop-and-wire surgical instrument.

[0021] Figure 6 It is a three-dimensional schematic diagram of a loop-and-wire surgical instrument. DETAILED DESCRIPTION

[0022] In order to better understand the technical solution of the present invention, the present invention is further described below through specific embodiments.

[0023] Reference Figures 1 to 6 As shown, a loop-and-thread surgical instrument comprises a needle shaft 1, a needle core 2, and a lead wire 3. A ligature 4 is also used during the operation. The ligature 4 is a ligature conventionally used in medical surgical operations.

[0024] The needle rod 1 includes a hollow rod body 11, which is made of medical stainless steel. One end of the rod body 11 is a puncture end 12 for puncturing the abdominal wall. The rod body is provided with a threading hole 13. The puncture end 12 is a structure in which the rod body 11 is bent to one side. The angle between the bent portion of the puncture end 12 and the axis of the rod body 11 is 10-30 degrees. The threading hole 13 is provided on the rod wall at or around the bend between the rod body 11 and the puncture end 12. A grip portion 14 is provided at the tail end of the needle rod 11 that is different from the puncture end. In this embodiment, the diameter of the rod body 11 is 1.5-3 mm, the inner diameter of the lumen is 1.2-2.5 mm, and the length of the puncture end is 1-2 cm.

[0025] The needle core 2 is made of medical stainless steel, and a limiting portion 21 is provided at one end of the needle core. When the needle core 2 is inserted into the rod body 11, the limiting portion 21 is connected to the gripping portion 14. The limiting portion 21 and the gripping portion 14 are detachably connected, and the connection method can be a thread, a slot, an insert, a plug-in connection, etc. In this embodiment, a slot 141 is provided on the end surface of the gripping portion 14, and a block 211 is provided on the contact surface to match the slot 141. The slot 141 and the block 211 are plugged into each other;

[0026] One end of the lead wire 3 is provided with a coil 31. The needle core 2 is inserted into the needle rod 1. When the needle core 2 passes through the threading hole 13, it penetrates into the coil 31 to fix the lead wire 3 to the needle rod 1. The circumference of the lead wire coil is 1.5cm-5cm. The end of the lead wire away from the lead wire coil is provided with a clamping sleeve 32 that is detachably connected to the needle rod. The clamping sleeve 32 can be slidably mounted on the outside of the needle rod along the needle rod to tighten or loosen the lead wire 32 as the needle rod slides.

[0027] The diameter of the ligature 4 is smaller than the inner diameter of the needle shaft 1. The ligature 4 can be passed through the needle shaft 1 and passed through the threading hole. The ligature uses a nylon thread with a diameter of 0.2-0.3 mm. The preferred ligature is surgical thread No. 4.

[0028] Reference Figures 1 to 6 As shown, before the operation, the needle rod 1, the needle core 2, and the lead 3 are assembled, the needle core 2 is inserted into the rod body 11, and the needle core 2 passes through the threading hole 13 and is inserted into the coil 31 to fix the lead 3 to the needle rod 11, and the clamping sleeve 32 moves toward the grip portion 14 to tighten the lead 3;

[0029] During the operation, the needle rod 1 passes through the abdominal wall around the hernia sac to be repaired, and the puncture end 12 punctures the abdominal wall. The puncture end 12 has a bent structure on one side to facilitate separation and sneaking. The needle rod 1 and the lead wire 3 penetrate the abdominal wall corresponding to the hernia ring and reach the lower abdominal wall. The puncture end 12 and the lead wire 3 penetrate the abdominal wall after passing half a circle under the abdominal wall; the needle core 2 is pulled out to separate the lead wire 3 from the needle rod 1, and the coil 31 of the lead wire 3 remains in the abdominal wall; the needle rod 1 is operated to retreat, and the puncture end 12 retreats half a circle to the original penetration point under the abdominal wall and turns, and then passes another half circle under the abdominal wall. Then penetrate into the abdominal wall, insert the puncture end 12 into the coil 31, and pass the ligature 4 from the tail end of the rod body 11 into the lumen of the needle rod 1 and out from the threading hole 13. At this time, the puncture end 12 is operated to retreat to the underside of the abdominal wall, and the ligature 4 is still in the coil 31. Pull the lead wire 3 outward to pull the ligature 4 out of the abdominal wall along with the lead wire 3. Withdraw the needle rod 1, pull out the tail end of the ligature 4, tie a knot at the head and tail ends of the ligature 4 outside the abdominal wall and tighten them, cut off the excess ligature 4, and retract the ligature joint to the subcutaneous tissue.

[0030] Reference Figures 1 to 6As shown, it can be seen from the above description of the present invention that the loop-and-wire surgical instrument provided by the present invention fixes the lead wire 3 on the needle rod 1 through the needle core 2, and releases the lead wire 3 when the needle core 2 is separated from the rod body 11. Its structure is simple, and the needle rod 1 and the needle core 2 are both hook-free designs, ensuring that the abdominal wall is not easily scratched during operation, and only one puncture of the abdominal wall is required during use; the puncture end 12 of the present invention is a structure bent to one side, which is convenient for separation and sneaking, and the threading hole 13 is provided on the rod wall at the bending part of the rod body 11 and the puncture end 12 or around it, which is convenient for the ligature line 4 to pass through. The ligature line 4 is brought out of the abdominal wall by using the coil 31 to wrap the line, which replaces the original operation method of using a hook to hook the line, which is more convenient and reliable and prevents tissue from being hooked.

[0031] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the patent application and the contents of the specification should still fall within the scope of the patent of the present invention.

Claims

1. A loop-and-wire surgical instrument, characterized in that: It includes a needle rod, a needle core, and a lead wire. The needle rod includes a hollow rod body, one end of the rod body is a puncture end for puncturing the abdominal wall, a threading hole is provided on the rod body, and one end of the lead wire is provided with a coil. The needle core can be inserted into the needle rod, and when the needle core passes through the threading hole, it penetrates into the coil to fix the lead wire to the needle rod. The threading hole is set on the rod wall at the bending part or around the rod body and the puncture end. The puncture end is a structure in which the rod body is bent to one side, and also includes a sleeve. The sleeve is connected to the lead wire away from the end with the coil. The sleeve can be slidably sleeved on the outside of the needle rod along the needle rod, and the sleeve tightens or loosens the lead wire when the needle rod slides.

2. The loop-and-wire surgical instrument according to claim 1, characterized in that: The angle between the bent portion of the puncture end and the axis of the rod body is 10-30 degrees.

3. The loop-and-wire surgical instrument according to claim 1, characterized in that: The needle rod is provided with a gripping portion, and the gripping portion is arranged at a tail end of the needle rod that is different from the puncture end.

4. The loop-and-wire surgical instrument according to claim 1, characterized in that: A limiting portion is provided at one end of the needle core, and the limiting portion is detachably connected to the gripping portion when the needle core is inserted into the needle rod.

5. The loop-and-wire surgical instrument according to claim 4, characterized in that: The contact surfaces of the position-limiting portion and the gripping portion for detachable connection are respectively provided with matching card slots and card blocks.

6. The loop-and-wire surgical instrument according to claim 1, characterized in that: The diameter of the needle rod is 1.5-3 mm, the inner diameter of the needle rod is 1.2-2.5 mm, and the length of the puncture end is 1-2 cm.

7. The loop-and-wire surgical instrument according to claim 1, characterized in that: The circumference of the lead wire coil is 1.5 cm to 5 cm.

Images