Cannula guide for cervical spinous process longitudinal cutting laminoplasty

Abstract

The present invention provides a cannula guide for cervical spinous process longitudinal cutting type laminoplasty, which relates to the technical field of medical devices. The cannula guide for cervical spinous process longitudinal cutting type laminoplasty comprises a guide tube for guiding the cannula; one end of the guide tube is an entry port for inserting the cannula, and the other end is an extension port for extending the cannula. The technical effect of reducing the risk of spinal cord injury is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a sleeve guide for cervical spinous process longitudinal cutting type laminoplasty. Background Art

[0002] Cervical spinous process longitudinal cutting type laminoplasty and coral artificial bone bridge implantation (SLAC) is one of the surgeries for treating cervical spinal stenosis. The intraoperative operation requires the removal of all C3 lamina and the upper part of C7 lamina, and then a cannula with a diameter of about 1.2mm needs to be inserted under the C4-C6 lamina and on the dorsal side of the dura mater, and then a metal wire saw is inserted into the cannula, the cannula is removed, and the spinous process is sawed longitudinally with a wire saw. After grinding out the lateral groove, the lamina is opened to both sides to expand the volume of the spinal canal, and then the coral artificial bone is used as a bone bridge to support the opened lamina and prevent the lamina from closing again. The guide can be inserted into the lamina in a small amount to ensure that the cannula is inserted in a direction parallel to the dura mater and lamina.

[0003] However, the current method of cannula insertion is to use flat forceps or hemostatic forceps to clamp the cannula and insert it between the vertebral plate and the dura mater, and each time the cannula is inserted a few millimeters, and multiple repeated insertion operations are required to insert the catheter to a sufficient length and expose it from the gap between the vertebral plate and the dura mater on the other side. Due to the limited local operating space, the insertion angle is difficult to be completely parallel to the dura mater and the vertebral plate, which causes difficulty in insertion, or forms an acute angle with the dura mater contact surface during the insertion process, and there is a component force that squeezes in the direction of the dura mater, which will cause a certain degree of squeezing on the dura mater, increasing the risk of spinal cord injury. In addition, during the repeated insertion operations, since there is no restriction on the cannula, the cannula is just left between the vertebral plate and the dura mater, so during the gradual insertion process, the cannula may swing, rotate or change the direction of advance.

[0004] Therefore, providing a cannula guide for cervical spinous process longitudinal cutting laminoplasty with low risk of spinal cord injury has become an important technical problem to be solved by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a sleeve guide for cervical spinous process longitudinal cutting type laminoplasty to alleviate the technical problem of high risk of spinal cord injury in the prior art.

[0006] In a first aspect, an embodiment of the present invention provides a cannula guide for cervical spinous process longitudinal cutting type laminoplasty, comprising a guide tube for guiding a cannula;

[0007] One end of the guide tube is an entry port for inserting the cannula, and the other end is an extension port for extending the cannula;

[0008] Holding pieces capable of abutting against the vertebral plates are fixedly arranged on both sides of the protruding opening.

[0009] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the guide tube is curved.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the inlet is funnel-shaped.

[0011] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a handle is fixedly provided on the guide tube.

[0012] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the handle is in a flat sheet shape.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an anti-slip layer is provided on the handle.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a window is provided on the guide tube, and medical personnel can observe the marking on the sleeve in the guide tube through the window.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the above-mentioned window adopts a waist-shaped slot hole, and the extension direction of the waist-shaped slot hole is perpendicular to the extension direction of the guide tube.

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the guide tube is a transparent plastic tube.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the holding piece protrudes from the end of the guide tube;

[0018] The edges of the holding piece are configured as rounded corners.

[0019] Beneficial effects:

[0020] The embodiment of the present invention provides a cannula guide for cervical spinous process longitudinal cutting type laminoplasty, including a guide tube for guiding the cannula; one end of the guide tube is an entry port for inserting the cannula, and the other end is an extension port for extending the cannula.

[0021] During specific use, the medical staff will first prepare an opening on the patient's spine, and then move the guide tube to the opening. The end of the guide can be inserted parallel to the vertebral plate and the dura mater, so as to stably fix the guide tube on the patient's spine. When in use, the medical staff will adjust the guide so that the guide tube presses against the vertebral plate to reduce the compression of the dura mater. Then the medical staff can insert the sleeve along the guide parallel to the vertebral plate and the dura mater of the patient, so as to reduce the compression of the dura mater and thus reduce the risk of spinal cord injury. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a first embodiment of a cannula guide for cervical spinous process longitudinal cutting laminoplasty provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a second embodiment of a cannula guide for cervical spinous process longitudinal cutting laminoplasty provided by an embodiment of the present invention;

[0025] Figure 3 A schematic diagram of a third embodiment of a cannula guide for cervical spinous process longitudinal cutting laminoplasty provided by an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the connection between a cannula guide and a cannula for cervical spinous process longitudinal cutting laminoplasty provided by an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the use of a cannula guide for cervical spinous process longitudinal cutting laminoplasty provided by an embodiment of the present invention;

[0028] Figure 6 An oblique view of a cannula guide for spinal canal enlargement surgery with longitudinal cutting of the spinous process provided by an embodiment of the present invention when in use.

[0029] icon:

[0030] 100 - guide tube; 110 - entry port; 120 - exit port;

[0031] 200 - gripping piece;

[0032] 300 – handle;

[0033] 400 - Window;

[0034] 500 - casing;

[0035] 600 - lamina;

[0036] 700 - Dura mater. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0042] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, an embodiment of the present invention provides a cannula guide for cervical spinous process longitudinal cutting laminoplasty, including a guide tube 100 for guiding a cannula 500; one end of the guide tube 100 is an entry port 110 for inserting the cannula 500, and the other end is an extension port 120 for extending the cannula 500; holding pieces 200 capable of abutting against the vertebral plate 600 are fixedly provided on both sides of the extension port 120.

[0043] During specific use, the medical staff will first prepare an opening on the patient's spine, and then move the guide tube 100 to the opening, and make the holding piece 200 at the end of the guide tube 100 abut against the patient's vertebral plate 600. The end of the guide tube 100 can be inserted parallel to the vertebral plate 600 and the dura mater 700, so as to stably fix the guide tube 100 on the patient's spine. When in use, the medical staff will adjust the guide device so that the guide tube 100 presses against the vertebral plate 600 to reduce the squeezing of the dura mater 700. Then the medical staff can insert the sleeve 500 along the guide tube 100 in parallel between the patient's vertebral plate 600 and the dura mater 700 to reduce the pressure on the dura mater 700, thereby reducing the risk of spinal cord injury.

[0044] Specifically, when medical personnel use the sleeve guide provided in this embodiment for cervical spinous process longitudinal cutting laminoplasty, the medical personnel will insert one end of the guide tube 100 into the patient's vertebral plate 600, and make the extension direction of the extension port 120 of the guide tube 100 parallel to the patient's vertebral plate 600 and dura mater 700.

[0045] Among them, a holding piece 200 is arranged on the outside of the extension port 120 of the guide tube 100. When the medical staff uses the sleeve guide for cervical spinous process longitudinal cutting laminoplasty provided in this embodiment, the medical staff will insert the holding piece 200 at the end of the guide tube 100 between the vertebral plate 600 and the dura mater 700, so that the vertebral plate 600 abuts against the holding piece 200, so that there is a certain squeezing force between the holding piece 200 and the vertebral plate 600, thereby improving the stability of the sleeve guide for cervical spinous process longitudinal cutting laminoplasty provided in this example, which is convenient for the subsequent operation of the medical staff.

[0046] It should be pointed out that one end of the guide tube 100 is an entry port 110, and the other end is an extension port 120. When medical personnel perform surgery, the sleeve 500 is inserted from the entry port 110 of the guide tube 100 and then discharged from the extension port 120 of the guide tube 100. During the surgery, the end of the guide tube 100 will be inserted into the vertebral plate 600, and the extension direction of the extension port 120 of the guide tube 100 is parallel to the vertebral plate 600 and the dura mater 700, so that the guide tube 100 can advance parallel to the vertebral plate 600 and the dura mater 700, thereby preventing the sleeve 500 from causing damage to the dura mater 700.

[0047] See also Figure 1 - Figure 6 As shown, in an optional solution of this embodiment, the guide tube 100 is curved.

[0048] Specifically, the guide tube 100 is configured to be curved, and the extension direction of the entry port 110 of the guide tube 100 forms an obtuse angle with the extension direction of the extension port 120 , so that medical personnel can guide the sleeve 500 between the vertebral plate 600 and the dura mater 700 .

[0049] Specifically, the guide tube 100 is in a continuous and smooth curved shape, so that the guide tube 100 can smoothly guide the sleeve 500 .

[0050] See also Figure 1 - Figure 6 As shown, in an optional solution of this embodiment, the inlet 110 is funnel-shaped.

[0051] Specifically, the entrance port 110 of the guide tube 100 is set to be funnel-shaped, thereby expanding the size of the entrance port 110 of the guide tube 100, so that medical personnel can easily insert the sleeve 500 into the guide tube 100 during the operation, and as the sleeve 500 is inserted into the guide tube 100, the guide tube 100 can constrain and guide the insertion direction of the sleeve 500, thereby preventing the sleeve 500 from contacting the dura mater 700 at an acute angle during the insertion process, thereby forming a component force in the downward direction of the dura mater 700, increasing the risk of spinal cord injury and guiding the direction of the sleeve, so that the sleeve 500 can enter between the vertebral plate 600 and the dura mater 700 in parallel, and move forward in the direction guided by the guide, thereby preventing the sleeve 500 from causing damage to the dura mater 700 due to shaking left and right during the gradual insertion process.

[0052] The extension port 120 and the size of the tube body of the guide tube 100 are adapted to the sleeve 500, so that after the sleeve 500 enters the guide tube 100 from the entry port 110, the sleeve 500 will not shake at will, and will pass through the vertebral plate 600 and the dura mater 700 in the guided direction parallel to the guide tube 100.

[0053] See also Figure 1 - Figure 6 As shown, in an optional solution of this embodiment, a handle 300 is fixedly provided on the guide tube 100 .

[0054] Specifically, a handle 300 is provided on the guide tube 100, and the handle 300 is fixedly provided on the guide tube 100. Through the setting of the handle 300, the medical staff can conveniently hold the guide tube 100, so that the medical staff can adjust the position of the guide tube 100, so that the extension port 120 is maintained at the highest point of the vertebral plate 600 and parallel to the vertebral plate 600 and the dura mater 700, thereby providing a better basis for the subsequent parallel insertion of the sleeve 500, thereby improving the surgical effect.

[0055] In an optional solution of this embodiment, the handle 300 is in the shape of a flat sheet.

[0056] Specifically, the handle 300 is configured to be a flat sheet. With this configuration, medical personnel can conveniently hold the handle 300 with two fingers to control the guide tube 100, which can reduce the constraints on the medical personnel's hands, allowing the medical personnel to do more things and facilitating the medical personnel to perform other operations.

[0057] In addition, one end of the handle 300 away from the guide tube 100 is configured to be in a teardrop shape so that the thumb and index finger of the medical staff can hold the handle 300 , which is helpful for maintaining the stability of the guide tube 100 .

[0058] In an optional solution of this embodiment, an anti-slip layer is provided on the handle 300 .

[0059] Specifically, an anti-skid layer is provided on the handle 300 , and the provision of the anti-skid layer can reduce or even prevent the medical staff from slipping their hands.

[0060] It should be pointed out that those skilled in the art can select the method and material of the anti-slip layer according to actual conditions, which will not be elaborated here.

[0061] See also Figure 1 - Figure 6 As shown, in an optional solution of the present embodiment, a window 400 is provided on the guide tube 100 , and medical personnel can observe the marking on the sleeve 500 inside the guide tube 100 through the window 400 .

[0062] Specifically, a window 400 is provided on the guide tube 100 , and medical personnel can observe the mark on the sleeve 500 in the guide tube 100 through the window 400 , thereby knowing the length of the sleeve 500 inserted into the vertebral plate 600 .

[0063] Among them, the window 400 opened on the guide tube 100 is close to the extension port 120 of the guide tube 100, and the distance between the window 400 and the extension port 120 can be set to 5mm, 10mm, 15mm, etc. The technical personnel in this field should set it according to the actual situation, which will not be repeated here. In addition, the distance between the window 400 and the extension port 120 is marked on the outer wall of the guide tube 100 so that medical personnel can know the length of the window 400 from the extension port 120 when in use.

[0064] It should be pointed out that when in use, the medical staff inserts the sleeve 500 into the guide tube 100, and then inserts it along the guide tube 100 between the vertebral plate 600 and the dura mater 700. During the process of the medical staff inserting the sleeve 500, the medical staff can observe the marking on the outer wall of the sleeve 500 through the window 400. When the medical staff observes the marking, they can know how long the sleeve 500 is inserted between the vertebral plate 600 and the dura mater 700.

[0065] Among them, sleeve 500 is a finished product with a total length of 20 cm. Identification rings are arranged at equal intervals on the outer wall, one identification ring is arranged at the head; one identification ring is arranged 5 cm away from the head; and one identification ring is arranged cm away from the head.

[0066] See also Figure 1 - Figure 6 As shown, in an optional solution of this embodiment, the window 400 adopts a waist-shaped slot hole, and the extension direction of the waist-shaped slot hole is perpendicular to the extension direction of the guide tube 100.

[0067] Specifically, the window 400 is configured as a waist-shaped slot, and the extension direction of the slot is perpendicular to the extension direction of the guide tube 100 . With such a configuration, medical personnel can conveniently observe the sleeve 500 in the guide tube 100 .

[0068] Among them, the length of window 400 is set to 2 mm, so that medical personnel can easily observe the sleeve 500 inside the guide tube 100 without affecting the strength of the guide tube 100; or, the length of window 400 is set to 3 mm, so that medical personnel can easily observe the sleeve 500 inside the guide tube 100 without affecting the strength of the guide tube 100.

[0069] In an optional solution of this embodiment, the guide tube 100 is a transparent plastic tube, and the holding piece 200 is a plastic structure integrated with the guide tube 100, which is convenient for disposable use and disposal.

[0070] Specifically, the guide tube 100 may be a transparent plastic tube. With such a configuration, the medical staff can directly and conveniently observe the position of the sleeve inside the guide tube 100 while ensuring the structural strength of the guide tube 100 , without the need to open a window 400 on the guide tube 100 .

[0071] In an optional solution of this embodiment, the holding piece 200 protrudes from the end of the guide tube 100; the edges of the holding piece 200 are set to be rounded.

[0072] Specifically, the holding pieces 200 disposed on both sides of the extension opening 120 of the guide tube 100 protrude from the end of the guide tube 100 , making it easier for medical personnel to abut the holding pieces 200 against the vertebral plate 600 .

[0073] The edges of the holding piece 200 are rounded to prevent the holding piece 200 from causing damage to the vertebral plate 600 and the dura mater 700 .

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cannula guide for cervical spinous process longitudinal cutting type laminoplasty, It is characterized in that include: A guide tube (100) for guiding the cannula (500); One end of the guide tube (100) is an entry port (110) for inserting the sleeve (500), and the other end is an extension port (120) for extending the sleeve (500); Holding pieces (200) capable of abutting against the vertebral plate (600) are fixedly arranged on both sides of the extension opening (120); The guide tube (100) is curved; The inlet (110) is funnel-shaped; The guide tube (100) is provided with a window (400), and medical personnel can observe the marking on the sleeve (500) in the guide tube (100) through the window (400); The window (400) is a waist-shaped slot hole, and the extending direction of the waist-shaped slot hole is perpendicular to the extending direction of the guide tube (100); The holding piece (200) protrudes from the end of the guide tube (100); the edges of the holding piece (200) are configured as rounded corners; When in use, the medical staff moves the guide tube (100) to the opening of the patient's spine, and makes the holding piece (200) at the end of the guide tube (100) abut against the patient's vertebral plate (600). The end of the guide tube (100) can be inserted parallel to the vertebral plate (600) and the dura mater (700), thereby stably fixing the guide tube (100) on the patient's spine. Then the medical staff can insert the sleeve (500) along the guide tube (100) parallel to the vertebral plate (600) and the dura mater (700), thereby reducing the pressure of the sleeve (500) on the dura mater (700).

2. The cannula guide for cervical spinous process longitudinal cutting laminoplasty according to claim 1, It is characterized in that A handle (300) is fixedly provided on the guide tube (100).

3. The cannula guide for cervical spinous process longitudinal cutting laminoplasty according to claim 2, It is characterized in that The handle (300) is in the shape of a flat sheet; The handle (300) is provided with an anti-slip layer.

4. The cannula guide for cervical spinous process longitudinal cutting laminoplasty according to claim 1, It is characterized in that The guide tube (100) is a transparent plastic tube.

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