Vertebral plate rongeur for decompression surgery of cervical spinal cord injury

Abstract

The invention discloses a vertebral plate rongeur for decompression surgery of cervical spinal cord injury, and relates to the technical field of surgical operating instruments. The lower nipper plate is connected with the upper nipper plate in a sliding fit mode, the rear handle is fixedly connected with the lower nipper plate, the front handle is connected with a rotating shaft of the rear handle, the upper end of the front handle is in transmission coupling with the rear end of the upper nipper plate, an inverted-U-shaped bone rongeur is arranged at the front end of the upper nipper plate, and a containing groove is formed in the bottom face of the upper nipper plate. The containing groove is communicated with an inlet of the inverted-U-shaped bone rongeur. A through hole is upwards formed in the rear part of the accommodating groove; a hook frame is arranged at the front end of the lower forceps plate and matched with the inverted-U-shaped bone rongeur in a butt joint mode. A cutter pad is detachably connected into the hook frame, and the hardness of the cutter pad is lower than that of the inverted-U-shaped bone rongeur. The inverted-U-shaped bone rongeur can be prevented from generating notches or becoming blunt due to hard bone tissue, and the service life is longer. The bone tissue can be temporarily stored in the biting process, and the operation time can be shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, in particular to a vertebral plate bone-binding forceps for cervical spinal cord injury decompression surgery, and may be related to an international patent classification number of A61B17 / 16. Background Art

[0002] Compression surgery after cervical spinal cord injury is mainly to restore the stability of the spine. When the cervical spine is traumatized, such as fracture, dislocation, etc., the normal structure of the spine is destroyed, which may cause compression on the spinal cord. Surgery can relieve this compression and rebuild the stable structure of the spine, creating favorable conditions for the recovery of the spinal cord.

[0003] In cervical spinal cord injury surgery, if the posterior cervical approach is used for decompression, lamina rongeurs are often used to bite off part of the lamina and the yellow ligament. When cervical fractures or lesions cause the lamina and the yellow ligament to deform and thicken, compressing the spinal cord, the use of lamina rongeurs can accurately remove the lamina and the yellow ligament tissue that compress the spinal cord, expand the volume of the spinal canal, and relieve the posterior compression of the spinal cord.

[0004] In order to successfully remove the lamina tissue and the yellow ligament, the pliers head of the lamina rongeur are sharp and hard, and fit closely with the hook frame of the pliers head. Therefore, the pliers head of the lamina rongeur has high precision. When biting off harder bone tissue, there are two situations that cause its precision to be damaged; 1. At the moment when the bone tissue is cut off, the pliers head cutter hits the hook frame, causing the blade to have a notch or become blunt. The harder the bone tissue, the greater the impact force, and the shorter the service life. When biting off the yellow ligament, the notched pliers head will not be able to completely cut off. In this case, moving the pliers body will cause the yellow ligament to tear. 2. The bitten bone tissue and yellow ligament need to be removed from the surgical opening in time, and the operation time is long. The pliers body using negative pressure adsorption can solve the above problems, but it needs to be connected to a negative pressure pipeline, which is relatively bulky to use. 3. The bitten bone tissue is harder. Once it is stuck between the upper and lower pliers, it will cause jamming and cannot be smoothly bitten and opened. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a laminar bone rongeur for cervical spinal cord injury decompression surgery, which can prevent the inverted U-shaped bone rongeur from being notched or blunted due to the harder bone tissue, and has a longer service life. During the biting process, the bone tissue and the yellow ligament can be temporarily stored, and there is no need to repeatedly remove them, which can shorten the operation time.

[0006] The technical solution adopted by the present invention is: to provide a laminar bone rongeur for decompression surgery of cervical spinal cord injury, comprising an upper pliers plate, a lower pliers plate slidably connected to the upper pliers plate, a rear handle fixedly connected to the lower pliers plate, and a front handle connected to the rear handle rotating shaft, wherein the upper end of the front handle is transmission-coupled with the rear end of the upper pliers plate, and a first reset spring is arranged between the upper pliers plate and the lower pliers plate;

[0007] The front end of the upper pliers plate is provided with an inverted U-shaped bone biting knife, and the bottom surface of the upper pliers plate is provided with a receiving groove, and the receiving groove is communicated with the inlet of the inverted U-shaped bone biting knife; the cross section of the receiving groove gradually increases from front to back; the rear part of the receiving groove is provided with a through hole upward;

[0008] The front end of the lower jaw plate is provided with a hook frame, and the hook frame is docked with the inverted U-shaped bone-biting knife; a knife pad is detachably connected to the hook frame, and the hardness of the knife pad is lower than that of the inverted U-shaped bone-biting knife; the upper surface of the knife pad is a concave arc surface.

[0009] To further optimize the technical solution, a vertebral plate bone biting forceps is provided for decompression surgery of cervical spinal cord injury, wherein a push rod is vertically arranged in the middle of the concave arc surface of the knife pad, and the push rod is plugged into and fits with the blade of the inverted U-shaped bone biting knife; the lower part of the push rod is slidably limitedly connected with the slot of the knife pad, and a second return spring is provided between the push rod and the slot; when the push rod is in the lowest position in the slot, the top of the push rod is located below the concave arc surface.

[0010] To further optimize the technical solution, a vertebral plate bone-holding forceps used in cervical spinal cord injury decompression surgery has a knife pad and a hook frame that are embedded and matched.

[0011] To further optimize the technical solution, a blade pad of a vertebral plate bone-holding forceps used for decompression surgery of cervical spinal cord injury is locked on the hook frame by a screw penetrating the hook frame.

[0012] To further optimize the technical solution, a through hole of a vertebral plate bone-holding forceps used in decompression surgery for cervical spinal cord injury is covered with a sealing plug.

[0013] To further optimize the technical solution, a vertebral lamina rongeur used in decompression surgery for cervical spinal cord injury has a blade pad made of PEEK.

[0014] To further optimize the technical solution, a vertebral plate rongeur used for decompression surgery of cervical spinal cord injury is provided with a depth mark on the lower jaw plate, and a reference line is provided on the upper jaw plate. The reference line and the depth mark are used together to indicate the depth of the blade pad of the inverted U-shaped rongeur.

[0015] In the technical solution recorded in the present invention, the bitten-off bone tissue can enter the receiving groove from the entrance of the inverted U-shaped bone biting knife for temporary storage. Since the bitten-off bone tissue is not circular but has an inverted U-shaped cross-section, and since the cross-section of the receiving groove gradually increases from front to back, once the bone tissue enters the receiving groove, the corner will not fall out. When a certain amount of bone tissue has accumulated, it can be sucked out from the through hole of the receiving groove by negative pressure, thereby improving the efficiency of the operation.

[0016] A knife pad with a lower hardness than the inverted U-shaped bone-biting knife is set in the hook frame to prevent the blade from being blunted or causing impact cuts. The knife pad is used as a consumable to ensure the accuracy of the entire pliers body.

[0017] There are two functions of setting the push rod on the knife pad:

[0018] On the one hand, when the inverted U-shaped bone biting knife completely cuts off the bone tissue or yellow ligament, the push rod can bounce the cut bone tissue or yellow ligament into the receiving groove for a certain distance, so that its position is deflected, thus preventing it from falling out.

[0019] On the other hand, since a cut mark is produced when the knife pad and the inverted U-shaped bone-cutting knife collide and contact, the vibration generated is buffered and absorbed when the knife sinks into the cut mark, so the operator cannot feel whether the bone tissue or the yellow ligament is completely cut. When the traditional vertebral plate bone-cutting knife cuts the bone tissue, a crisp impact sound can be heard as feedback of complete cutting. In the present invention, the second function of the push rod is to use its rebound to produce an impact sound to give feedback to the operator.

[0020] Other technical effects of the present invention will be gradually clarified in the development of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a partial cross-sectional schematic diagram of the hook frame;

[0023] Figure 3 Schematic diagram of the structure of the upper clamp plate;

[0024] Figure 4 This is a disassembly schematic diagram of the present invention.

[0025] In the figure, 1, upper jaw; 2, lower jaw; 3, rear handle; 4, front handle; 5, first return spring; 6, inverted U-shaped bone gnaw; 7, receiving groove; 8, through hole; 9, hook; 10, knife pad; 11, push rod; 12, slot; 13, second return spring; 14, screw; 15, sealing plug; 16, depth mark; 17, reference line. DETAILED DESCRIPTION

[0026] For the sake of simplicity, "clamp body" is used as the abbreviation of "a vertebral plate rongeur for decompression surgery of cervical spinal cord injury". "Front" in the present invention refers to the position of the inverted U-shaped rongeur 6; "rear" refers to the position of the handle.

[0027] like Figure 1-4 As shown, a laminar bone rongeur for decompression surgery of cervical spinal cord injury is provided, comprising an upper jaw 1, a lower jaw 2 connected to the upper jaw 1 with sliding cooperation, a rear handle 3 fixedly connected to the lower jaw 2, and a front handle 4 connected to the rotating shaft of the rear handle 3, wherein the upper end of the front handle 4 is transmission coupled with the rear end of the upper jaw 1, and a first reset spring 5 is arranged between the upper jaw 1 and the lower jaw 2;

[0028] The front end of the upper pliers 1 is provided with an inverted U-shaped bone-biting knife 6, and the bottom surface of the upper pliers 1 is provided with a receiving groove 7, and the receiving groove 7 is communicated with the inlet of the inverted U-shaped bone-biting knife 6; the cross section of the receiving groove 7 gradually increases from front to back; the rear part of the receiving groove 7 is provided with a through hole 8 upward;

[0029] A hook frame 9 is provided at the front end of the lower jaw plate 2, and the hook frame 9 is docked with the inverted U-shaped bone-biting knife 6; a knife pad 10 is detachably connected to the hook frame 9, and the hardness of the knife pad 10 is lower than the hardness of the inverted U-shaped bone-biting knife 6; the upper surface of the knife pad 10 is a concave arc surface.

[0030] like Figure 1 As shown, the front part of the clamp body is pointed in order to facilitate accurate positioning of the lamina biting position. The cross-section of the upper clamp plate 1 gradually increases from front to back, and the accommodating groove 7 arranged on its lower end face also gradually increases accordingly. The upper end face of the lower clamp plate 2 forms a sliding seal with the accommodating groove 7. The bitten bone tissue is temporarily stored in the accommodating groove 7. When the accumulated bone tissue needs to be cleared, the bone tissue or yellow ligament is sucked out from the through hole 8 using a negative pressure air source.

[0031] It is worth noting that the negative pressure gas source mentioned here is different from the rongeur with a negative pressure tube in the prior art. In the prior art, such rongeur is always connected to the negative pressure tube during use, so the negative pressure tube is thin and cannot be opened at a large flow rate during the operation. The negative pressure gas source in this embodiment is used outside the surgical incision of the forceps body, so the thickness of the tube is not limited, and the flow rate of the negative pressure gas source is not limited, so the bone tissue can be quickly and centrally sucked out from the receiving groove 7.

[0032] To further optimize this embodiment, a vertebral plate bone biting forceps is provided for decompression surgery of cervical spinal cord injury, wherein a push rod 11 is vertically arranged in the middle of the concave arc surface of the knife pad 10, and the push rod 11 is plugged into and fits with the blade of the inverted U-shaped bone biting knife 6; the lower part of the push rod 11 is slidably limitedly connected with the slot 12 of the knife pad 10, and a second reset spring 13 is provided between the push rod 11 and the slot 12; when the push rod 11 is at the lowest position in the slot 12, the top of the push rod 11 is located below the concave arc surface.

[0033] When the inverted U-shaped bone biting knife 6 cuts bone tissue, the push rod 11 is pressed into the inside of the knife pad 10 by the bone tissue, which can prevent the push rod 11 from being crushed and allow the bone tissue to fully contact the concave arc surface of the knife pad 10. The shape of the concave arc surface can prevent the bone tissue from slipping. When the bone tissue is cut off, the cut bone tissue loses its connection with the vertebral plate. Since the cross-section of the receiving groove 7 gradually increases backward, the contact between the cut bone tissue and the inverted U-shaped bone biting knife 6 is only left with friction in the direction parallel to the blade. If the elastic force provided by the second reset spring 13 that pushes the push rod 11 is greater than the friction force, the bone tissue can be bounced into the receiving groove 7 and hit the limit position of the knife pad 10 to give feedback to the operator.

[0034] To further optimize this embodiment, a blade pad 10 of a vertebral plate bone-holding forceps used for decompression surgery of cervical spinal cord injury is engaged with a hook frame 9.

[0035] The knife pad 10 is a consumable part. As the knife marks of the pliers body are gradually deepened with the use of the pliers, it should be replaced immediately before being cut through. It can be peeled off from the hook frame 9 using a special pry tool, and then a new knife pad 10 can be embedded for use.

[0036] To further optimize the present embodiment, a blade pad 10 of a vertebral lamina rongeur used for decompression surgery of cervical spinal cord injury is locked on the hook frame 9 by means of a screw 14 penetrating the hook frame 9 .

[0037] After the inverted U-shaped bone-biting knife 6 cuts into the knife pad 10 to a certain depth, it generates an upward friction force with the knife pad 10 when withdrawing. The screw 14 is locked to prevent the knife pad 10 from being loosened and being taken out.

[0038] To further optimize the present embodiment, a sealing plug 15 is provided on the through hole 8 of a vertebral plate bone-holding forceps used for decompression surgery of cervical spinal cord injury.

[0039] The sealing plug 15 can prevent the bone tissue or yellow ligament accumulated in the receiving groove 7 from falling out, and can also prevent the operator from being scratched by the edge of the through hole 8.

[0040] To further optimize this embodiment, the blade pad 10 of a vertebral plate rongeur used for decompression surgery of cervical spinal cord injury is made of PEEK material. PEEK material can be used as a medical plastic directly in contact with the human body, and has a relatively high hardness, is relatively durable, and the surface is not easily scratched to cause fiber flash.

[0041] To further optimize the present embodiment, a vertebral ridge bone rongeur used for decompression surgery of cervical spinal cord injury is provided with a depth mark 16 on the lower jaw plate 2, and a reference line 17 is provided on the upper jaw plate 1. The reference line 17 cooperates with the depth mark 16 to indicate the depth of the extended blade pad 10 of the inverted U-shaped bone rongeur 6.

[0042] The knife pad 10 is a consumable and its consumption level can be judged and indicated by the depth scale line 16 so that it can be replaced in advance to prevent the knife pad 10 from being cut through during use and causing damage to the inverted U-shaped bone biting knife 6.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A vertebral plate rongeur for decompression surgery of cervical spinal cord injury, comprising an upper pliers plate, a lower pliers plate slidably connected to the upper pliers plate, a rear handle fixedly connected to the lower pliers plate, and a front handle connected to the rear handle shaft, wherein the upper end of the front handle is transmission-coupled with the rear end of the upper pliers plate, and a first return spring is arranged between the upper pliers plate and the lower pliers plate; characterized in that: The front end of the upper pliers plate is provided with an inverted U-shaped bone biting knife, and the bottom surface of the upper pliers plate is provided with a receiving groove, and the receiving groove is communicated with the inlet of the inverted U-shaped bone biting knife; the cross section of the receiving groove gradually increases from front to back; the rear part of the receiving groove is provided with a through hole upward; The front end of the lower jaw plate is provided with a hook frame, and the hook frame is docked with the inverted U-shaped bone-biting knife; a knife pad is detachably connected to the hook frame, and the hardness of the knife pad is lower than that of the inverted U-shaped bone-biting knife; the upper surface of the knife pad is a concave arc surface.

2. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: A push rod is vertically arranged in the middle of the concave arc surface of the knife pad, and the push rod is plugged into and matched with the blade of the inverted U-shaped bone biting knife; the lower part of the push rod is slidably limitedly connected with the slot of the knife pad, and a second return spring is arranged between the push rod and the slot; when the push rod is at the lowest position in the slot, the top of the push rod is located below the concave arc surface.

3. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: The knife pad is engaged with the hook frame.

4. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: The knife pad is locked on the hook frame by means of screws penetrating the hook frame.

5. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: The through hole is covered with a sealing plug.

6. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: The knife pad is made of PEEK material.

7. The laminar bone rongeur for decompression surgery of cervical spinal cord injury according to claim 1, characterized in that: The lower jaw plate is provided with a depth scale line, and the upper jaw plate is provided with a reference line. The reference line and the depth scale line are used together to indicate the depth of the blade pad of the inverted U-shaped bone-biting knife.

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