Neonatal pyloric ring muscle cutting device

Abstract

This invention provides a pyloric myotomy device capable of performing opening and cutting operations with a single instrument, comprising: an operating rod having a fixed jaw at one end and a fixed handle at the other end; a movable jaw hinged to the fixed jaw; a movable handle rotatably connected to the fixed handle and connected to the movable jaw via a connecting assembly for controlling the opening and closing of the movable jaw; and an operating sleeve fixedly fitted on the outer surface of the operating rod and positioned close to the fixed handle. The operating rod has a receiving groove extending along its length, and a blade is disposed within the receiving groove. The operating sleeve has an operating handle connected to the other end of the blade for controlling the blade to extend or retract from the opening. The operating handle has a limiting element that prevents the movable handle from rotating, so that the movable handle cannot rotate when the blade extends from the opening under the control of the operating handle, thereby limiting the opening of the movable jaw.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a neonatal pyloric myotomy device. Background Technology

[0002] Pyloric myotomy is the standard surgical procedure for treating congenital hypertrophic pyloric stenosis in newborns. The main procedure is to cut open the excessively thickened muscle layer of the pylorus to relieve the obstruction of the gastric outlet.

[0003] Currently, laparoscopic minimally invasive surgery is commonly used in clinical practice for pyloric myotomy. Because the surgical site needs to be opened and cut during the procedure, two types of laparoscopic instruments—a retractor and a cutting blade—must be used alternately. This necessitates repeated instrument changes, which not only reduces the smoothness of the surgical procedure and prolongs the operation time but also increases the anesthetic risks associated with the extended operation. Furthermore, the repeated entry and exit of instruments into the neonatal abdominal cavity increases the likelihood of accidental injury. Summary of the Invention

[0004] To address the aforementioned problems, the present invention provides a pyloric circular muscle cutting device capable of performing both distraction and cutting operations using a single instrument.

[0005] This invention specifically provides a neonatal pyloric myotomy device, comprising: an operating rod with a fixed jaw at one end and a fixed handle at the other end; a movable jaw hinged to the fixed jaw; a movable handle rotatably connected to the fixed handle and connected to the movable jaw via a connecting assembly for controlling the opening and closing of the movable jaw; and an operating sleeve fixedly fitted on the outer surface of the operating rod and positioned close to the fixed handle. The operating rod has a receiving groove extending along its length, with an opening at one end of the receiving groove on the fixed jaw. A blade is provided within the receiving groove, with one end of the blade located at the opening. An operating handle is provided on the operating sleeve and connected to the other end of the blade for controlling the blade to extend or retract from the opening. The operating handle has a limiting member that prevents the movable handle from rotating, thus limiting the opening of the movable jaw when the blade extends from the opening under the control of the operating handle.

[0006] The neonatal pyloric myotomy device provided by the present invention, since the movable handle is connected to the movable jaws via a connecting assembly, can control the opening and closing of the movable jaws. Simultaneously, the blade at the fixed jaws is connected to the operating handle, which has a limiting component that prevents the movable handle from rotating. Therefore, the movable handle cannot rotate when the blade is extended, preventing the movable jaws from opening due to accidental contact with the movable handle during the incision operation, thus avoiding interference from the movable jaws during the incision operation. Furthermore, the movable jaws can only open when the blade is retracted, preventing interference from the blade or accidental injury to non-target areas during the expansion operation. Thus, the neonatal pyloric myotomy device of the present invention can perform both expansion and incision operations without interference between the two processes, reducing the number of instruments required for pyloric myotomy, minimizing the wound, and reducing the difficulty of the operation.

[0007] The neonatal pyloric myotomy device provided by this invention may also have the following technical features: the operating handle has a handle body, and the operating sleeve has a guide groove for accommodating the handle body. This guide groove extends along the length direction, allowing the handle body to move along the length direction. The movable handle has a limiting groove that matches a limiting member. This limiting groove has an opening on the surface of the movable handle away from the fixed jaws, allowing the limiting member to enter the limiting groove as the handle body moves, thereby limiting the rotation of the movable handle. By allowing the handle body to move along the length direction via the guide groove, and simultaneously providing a limiting groove on the movable handle, the limiting member can achieve the restriction or release of rotation of the movable handle through simple movement. The structure is simple and easy to manufacture.

[0008] Furthermore, the neonatal pyloric myotomy device provided by the present invention may also have the following technical features: the operating handle has a connecting rod, and the blade has a shank connected to the blade. The shank has a connecting hole, and the connecting rod is inserted into the connecting hole to connect the operating handle and the blade. This method of connecting rod and connecting hole makes the connection structure between the operating handle and the blade simple, and allows for disassembly, facilitating installation and maintenance.

[0009] Furthermore, the neonatal pyloric myotomy device provided by this invention may also have the following technical feature: the width of the limiting member on the side near the fixed jaws is smaller than the width on the side away from the fixed jaws, and the shape of the limiting groove matches the limiting member. Because the two ends of the limiting member have different widths, and the width on the side away from the fixed jaws is larger (i.e., the width corresponding to the opening of the limiting groove is larger), the limiting member can more easily enter the limiting groove, and can smoothly restrict the movable handle even in the case of slight misalignment.

[0010] The neonatal pyloric myotomy device provided by this invention also features a blade made of conductive material, with an electrode wire connected to it for electrical connection to electrosurgical equipment. Preferably, both the outer surface of the blade and the inner surface of the receiving groove are provided with an insulating coating. Therefore, the neonatal pyloric myotomy device of this invention can use the blade to electrocoagulate and stop bleeding at the incision process, further expanding its functionality and improving surgical outcomes.

[0011] The neonatal pyloric myotomy device provided by this invention may also have the following technical features: the movable jaw has a beak portion whose shape matches the fixed jaw and a connecting portion extending from the end of the beak portion; the operating rod is provided with a mounting groove, and the end of the connecting portion is hinged in the mounting groove. Further, in the neonatal pyloric myotomy device provided by this invention, the connecting assembly may include: a first hinge rod, one end of which is hinged to the movable jaw; a second hinge rod, one end of which is hinged to the other end of the first hinge rod; and a connecting wire, one end of which is connected to the other end of the second hinge rod, and the other end of which is connected to the movable handle. In this invention, because the movable jaw is hinged in the mounting groove, and the connecting assembly uses two hinged rods that are hinged to each other, the movement of the movable jaw when the connecting wire pulls it to rotate is smoother, and it is less likely to cause problems such as skewness or rotation failure.

[0012] The neonatal pyloric myotomy device provided by this invention may further include: an operating button; an operating sleeve having an operating groove extending along its length; the operating button being disposed outside the operating groove and connected to the operating handle via a connecting component passing through the operating groove. This operating button allows medical personnel to more easily manipulate the operating handle, further reducing the difficulty of operation. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the neonatal pyloric myotomy device according to an embodiment of the present invention.

[0014] Figure 2 This is a structural diagram of the operating lever according to an embodiment of the present invention.

[0015] Figure 3 This is a cross-sectional view of the pyloric ring muscle cutting device of this invention at the fixed beak portion.

[0016] Figure 4 This is a structural diagram of the cutting tool according to an embodiment of the present invention.

[0017] Figure 5 This is a structural diagram of the operating sleeve according to an embodiment of the present invention.

[0018] Figure 6 This is a structural diagram of the operating handle according to an embodiment of the present invention.

[0019] Figure 7 This is a schematic diagram illustrating the interaction between the limiting component and the movable handle in an embodiment of the present invention.

[0020] Figure 8-9 This is a schematic diagram illustrating the usage of the neonatal pyloric myotomy device according to an embodiment of the present invention, wherein... Figure 8 This refers to the state during the expansion operation. Figure 9 This is the state during the cutting operation.

[0021] Reference numerals: Neonatal pyloric myotomy device 100; operating rod 1; fixed beak 11; fixed handle 12; receiving groove 13; opening 14; mounting groove 15; connecting groove 16; blade 2; blade 21; cutting edge 211; blade shank 22; electrode wire 221; connecting hole 222; movable beak 3; beak 31; connecting part 32; connecting pin 33; movable handle 4; hinge part 41; limiting groove 42; connecting assembly 5; first hinge rod 51; second hinge rod 52; connecting wire 53; operating sleeve 6; guide groove 61; operating groove 62; operating handle 7; handle body 71; connecting rod 72; limiting member 73; operating button 8. Detailed Implementation

[0022] The specific embodiments of the present invention will be described below with reference to the accompanying drawings and examples.

[0023] <Example>

[0024] Figure 1 This is a three-dimensional structural diagram of the neonatal pyloric myotomy device according to an embodiment of the present invention.

[0025] like Figure 1 As shown, the neonatal pyloric myotomy device 100 (hereinafter referred to as device 100) of this embodiment includes an operating rod 1, a blade 2, a movable forceps beak 3, a movable handle 4, a connecting assembly 5, an operating sleeve 6, an operating handle 7, and an operating button 8.

[0026] Figure 2 This is a structural diagram of the operating lever according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of the pyloric ring muscle cutting device of this invention at the fixed beak portion.

[0027] like Figure 1-3 As shown, the operating lever 1 is a slender rod-shaped component with an outer diameter of approximately 3 mm. One end of the operating lever 1 is provided with a fixed jaw 11, and the other end is provided with a fixed handle 12. In the following description of the embodiments, unless otherwise specified, "length direction" refers to the length direction of the operating lever 1, "front" refers to the direction closer to the fixed jaw 11, and "rear" refers to the direction closer to the fixed handle 12.

[0028] The fixed jaw 11 is located on the upper side of the end of the operating lever 1 and is integrally formed with the operating lever 1. The width and thickness of the end of the fixed jaw 11 away from the operating lever 1 are smaller than the width of the part close to the operating lever 1, presenting a thin and wide shape, and all edges have rounded chamfers.

[0029] like Figure 3 As shown, the operating lever 1 has a receiving groove 13 extending along the length direction inside. The receiving groove 13 extends from the end of the fixed jaw 11 to the position of the operating lever 1 near the fixed handle 12, and has an opening 14 on the front end face of the fixed jaw 11.

[0030] Figure 4 This is a structural diagram of the cutting tool according to an embodiment of the present invention.

[0031] like Figure 1 , 3 As shown in Figure 4, the cutting tool 2 is disposed in the receiving groove 13, including the cutting blade 21 and the cutting tool shank 22.

[0032] The blade 21 is located at the front end of the receiving groove 13, and its cross-sectional shape and size match the receiving groove 13, allowing it to extend or retract from the opening 14. The cutting edge 211 of the blade 21 faces the opening 14 and is exposed when the blade 21 extends from the opening 14, thus enabling it to perform a cutting action. In this embodiment, the extension length of the blade 21 is 5 mm, and the blade 21 is provided with graduations (not shown in the figure) to indicate the cutting depth, thereby preventing the problem of cutting too deeply.

[0033] The scalpel 22 is a long rod-shaped structure, with one end connected to the rear end of the blade 21 and integrally formed with it. The total length of the scalpel 22 and the blade 21 is less than the length of the receiving groove 13 to facilitate the extension and retraction of the blade 21. In this embodiment, an electrode wire 221 is connected to the rear end of the scalpel 22. This electrode wire 221 extends from the opening at the rear end of the operating rod 1 and is used for electrical connection with the electrosurgical device. The scalpel 22 and the blade 21 are made of conductive and hard metal materials such as stainless steel, titanium, and tungsten alloy. When the electrode wire 221 is connected to the electrosurgical device, high-frequency electrical energy can be applied, enabling the blade 21 to electrocoagulate and stop bleeding at the bleeding points during the incision process. In addition, the outer surface of the scalpel 22 and the inner surface of the receiving groove 13 are both provided with an insulating coating to prevent leakage and ensure that the current only acts on the target area through the blade 21.

[0034] like Figure 3As shown, the movable jaw 3 has a beak portion 31 whose shape matches that of the fixed jaw 11, and a connecting portion 32 extending from the end of the beak portion 31. A mounting groove 15 is provided on the operating lever 1 near the fixed jaw 11. The end of the connecting portion 32 is hinged in the mounting groove 15 by a connecting pin 33, allowing it to rotate around the connecting pin 33 to open or close relative to the fixed jaw 11. In this embodiment, the hinge portion of the connecting portion 32 is also provided with a spring wire (not shown in the figure), which keeps the movable jaw 3 in contact with the fixed jaw 11 without external force.

[0035] The movable handle 4 is located at the fixed handle 12, and a hinge part 41 is provided at the upper part of its middle section. The hinge part 41 is hinged to the fixed handle 12, so that the movable handle 4 can rotate relative to the fixed handle 12.

[0036] like Figure 1 , 3 As shown, the connecting assembly 5 is used to connect the movable handle 4 and the movable jaw 3, and includes a first hinge rod 51, a second hinge rod 52 and a connecting wire 53.

[0037] Both the first hinge rod 51 and the second hinge rod 52 are located in the mounting groove 15. One end of the first hinge rod 51 is hinged to the movable jaw 3, and its hinged part is located further outward (i.e. further away from the fixed jaw 11) relative to the connecting pin 33. One end of the second hinge rod 52 is hinged to the other end of the first hinge rod 51.

[0038] The operating lever 1 has a through-hole (not shown in the figure) extending along its length. One end of the through-hole is located at the mounting groove 15, and the other end is located near the upper end of the movable handle 4, close to the fixed handle 12. A connecting wire 53 is disposed in the through-hole, with one end connected to the other end of the second hinge rod 52 and the other end passing through the through-hole and connected to the upper end of the movable handle 4. When the movable handle 4 is pressed down, its upper end drives the connecting wire 53 to move rearward (i.e., away from the fixed jaw 11). This movement of the connecting wire 53 causes the second hinge rod 52 and the first hinge rod 51 to move rearward, thereby causing the movable jaw 3 to rotate and open relative to the fixed jaw 11.

[0039] In this embodiment, a spring (not shown in the figure) is provided at the hinge part 41. When the force pressing down on the movable handle 4 is removed, the movable handle 4 returns to its original position under the action of the spring. At the same time, the movable jaw 3 rotates under the action of the spring wire, thereby closing relative to the fixed jaw 11. In addition, the receiving hole and the receiving groove 13 are not connected to each other to avoid interference between the movement of the blade 2 and the connecting steel wire 53.

[0040] like Figure 3As shown, the side of the operating lever 1 is provided with a connecting groove 16 extending along the length direction. The connecting groove 16 is located at the position of the operating sleeve 6. It extends inward from the outer surface of the operating lever 1 into the receiving groove 13 and communicates with the receiving groove 13.

[0041] Figure 5 This is a structural diagram of the operating sleeve according to an embodiment of the present invention.

[0042] like Figure 1 , Figure 5 As shown, the operating sleeve 6 is cylindrical and is fixedly sleeved on the outer surface of the operating lever 1, located near the fixed handle 12.

[0043] The operating sleeve 6 has a guide groove 61 extending along its length inside, and the guide groove 61 has an opening on the rear surface of the operating sleeve 6. The outer side of the guide groove 61 is connected to an operating groove 62, which is rectangular in its length and has a rectangular opening on the outer surface of the operating sleeve 6. At the same time, the inner side of the guide groove 61 is also connected to a connecting groove (not shown in the figure) extending along its length. The position, shape and size of the connecting groove match the connecting groove 16 and are opposite to the connecting groove 16.

[0044] In addition, in this embodiment, the operating sleeve 6 is a spliced ​​structure, that is, it is composed of two semi-annular cylindrical parts or more arc-shaped cylindrical parts spliced ​​together and fixed to the outside of the operating rod 1 by adhesive or snap-fit, so as to facilitate the installation and connection of other components such as the operating handle 7 on the operating sleeve 6.

[0045] Figure 6 This is a structural diagram of the operating handle according to an embodiment of the present invention.

[0046] like Figure 1 , 6 As shown, the operating handle 7 is mounted on the operating sleeve 6 and includes a handle body 71, a connecting rod 72, and a limiting member 73.

[0047] A portion of the handle body 71 is located within the guide groove 61, and its shape and size match the guide groove 61, allowing it to move back and forth along its length within the guide groove 61. Another portion of the handle body 71 extends from the opening of the guide groove 61 to the movable handle 4, and is located on the outer side of the movable handle 4.

[0048] One end of the connecting rod 72 is connected to the portion of the handle body 71 located within the guide groove 61, and is located on the surface facing inward (i.e., towards the operating lever 1). For example... Figure 5As shown, the end of the tool holder 22 furthest from the blade 21 has a connecting hole 222. The connecting rod 72 passes through the connecting groove and the communicating groove 16 in sequence and is then inserted into the connecting hole 222, allowing the tool holder 22 to move along the length direction together with the handle body 71. In this embodiment, the connecting rod 72 is made of a non-conductive material, or its surface is coated with an insulating coating, to prevent current leakage at the tool holder 22 through the connecting rod 72.

[0049] The limiting member 73 is located at the end of the handle body 71 outside the guide groove 61 and is provided on the surface facing the movable handle 4.

[0050] Figure 7 This is a schematic diagram illustrating the interaction between the limiting component and the movable handle in an embodiment of the present invention.

[0051] like Figure 1 , 7 As shown, the movable handle 4 is provided with a limiting groove 42, which is aligned with the limiting member 73 in the longitudinal direction. The limiting groove 42 has an opening on the rear surface of the movable handle 4. When the limiting member 73 moves back and forth with the handle body 71 in the longitudinal direction, it can enter the limiting groove 42 from the rear and engage within the limiting groove 42, or disengage from the limiting groove 42. When the limiting member 73 is located within the limiting groove 42, the rotation of the movable handle 4 is restricted by the limiting member 73 and the handle body 71 and cannot rotate. When the limiting member 73 disengages from the limiting groove 42, the movable handle 4 can be pressed down under the action of external force and thus rotate.

[0052] In this embodiment, the front width of the limiting member 73 is smaller than the rear width, presenting an approximately trapezoidal shape, and the shape of the limiting groove 42 matches that of the limiting member 73. Therefore, when the limiting member 73 moves forward with the handle body 71, it is easier for it to enter the limiting groove 42.

[0053] The operation button 8 is located on the outside of the operation slot 62, and its inner surface is connected to the handle body 71 through a connecting member passing through the operation slot 62. When the operation button 8 is pushed along the length direction, the handle body 71 can be moved back and forth along the length direction.

[0054] Figure 8-9 This is a schematic diagram illustrating the usage of the neonatal pyloric myotomy device according to an embodiment of the present invention, wherein... Figure 8 This refers to the state during the expansion operation. Figure 9 This is the state during the cutting operation.

[0055] like Figure 8As shown, during use, medical personnel first push the operating button 8 backward to disengage the limiting member 73 from the limiting groove 42. At this time, the medical personnel can press down the movable handle 4, causing its upper end to retract, which in turn causes the connecting assembly 5 to rotate the movable jaw 3 away from the fixed jaw 11. At this point, the two jaws open, completing the opening operation. During operation, if it is necessary to close the movable jaw 3, the movable handle 4 can be released, allowing the spring at the connecting part 32 to return the movable handle 4 to its original position. Simultaneously, the spring at the connecting pin 33 actuates the movable jaw 3 to close again. Then, the movable handle 4 can be pressed down again to open the movable jaw 3 as needed.

[0056] like Figure 9 As shown, after the opening operation is completed, the movable handle 4 needs to be released to close the movable jaw 3 and maintain it in the closed state. Then, the operating button 8 can be pushed forward, causing the blade 21 to extend while the limiting member 73 engages in the limiting groove 42. At this time, under the limiting effect of the cooperation between the limiting member 73 and the limiting groove 42, even if the movable handle 4 is accidentally pressed, it will not rotate. Correspondingly, the movable jaw 3 can remain in the closed state, thereby avoiding affecting the cutting operation of the blade 21.

Claims

1. A neonatal pyloric myotomy device, characterized in that, include: The operating lever has a fixed jaw at one end and a fixed handle at the other end; The movable jaws are hinged nearby to the fixed jaws; The movable handle is rotatably connected to the fixed handle and is connected to the movable jaws via a connecting assembly, and is used to control the opening and closing of the movable jaws; An operating sleeve is fixedly fitted onto the outer surface of the operating lever, and its position is close to the fixed handle. The operating lever has a receiving groove extending along its length, and the end of the receiving groove has an opening on the fixing jaws. The receiving groove is provided with a cutting tool, one end of which has a blade located at the opening. The operating sleeve is equipped with an operating handle, which is connected to the other end of the blade and is used to control the blade to extend or retract from the opening. The operating handle has a limiting element that can prevent the movable handle from rotating, so that the movable handle cannot rotate when the blade is extended from the opening by the operating handle, thereby limiting the opening of the movable jaws.

2. The neonatal pyloric myotomy device according to claim 1, characterized in that: in, The operating handle has a handle body. The operating sleeve has a guide groove for receiving the handle body, the guide groove extending along the length direction, allowing the handle body to move along the length direction. The movable handle is provided with a limiting groove that matches the limiting member. The limiting groove has an opening on the surface of the movable handle away from the fixed jaws, so that the limiting member can enter the limiting groove as the handle body moves, thereby limiting the rotation of the movable handle.

3. The neonatal pyloric myotomy device according to claim 2, characterized in that: in, The operating handle also has a connecting rod. The cutting tool also has a shank connected to the blade, and the shank has a connecting hole. The connecting rod is inserted into the connecting hole to connect the operating handle to the cutting tool.

4. The neonatal pyloric myotomy device according to claim 2, characterized in that: in, The width of the limiting member on the side closer to the fixed jaws is smaller than the width on the side farther from the fixed jaws. The shape of the limiting groove matches the limiting element.

5. The neonatal pyloric myotomy device according to claim 1, characterized in that: in, The cutting tool is made of conductive material and is also connected to electrode wires. The electrode wires are used for electrical connection to electrosurgical equipment.

6. The neonatal pyloric myotomy device according to claim 5, characterized in that: in, Both the outer surface of the blade and the inner surface of the receiving groove are provided with an insulating coating.

7. The neonatal pyloric myotomy device according to claim 1, characterized in that: in, The movable jaw has a beak portion whose shape matches that of the fixed jaw and a connecting portion extending from the end of the beak portion. The operating lever is provided with a mounting groove, and the end of the connecting part is hinged in the mounting groove.

8. The neonatal pyloric myotomy device according to claim 7. Its features are: in, The connection component includes: The first hinge rod is hinged at one end to the movable jaw; The second hinge rod has one end hinged to the other end of the first hinge rod; and A connecting wire is attached, with one end connected to the other end of the second hinge rod and the other end connected to the movable handle.

9. The neonatal pyloric myotomy device according to claim 1, characterized in that, Also includes: Operation button The operating sleeve is provided with an operating groove extending along the length direction. The operation button is located on the outside of the operation slot and is connected to the operation handle through a connecting component passing through the operation slot.

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