An auxiliary guide device for solid nail placement in minimally invasive spinal surgery

Abstract

The present invention provides an auxiliary guide device for inserting a solid screw in minimally invasive spinal surgery, comprising an outer sleeve and an inner sleeve; the outer sleeve comprises a cylindrical fixing portion, the lower end of which is provided with a cylindrical first outer positioning portion, the lower end of which is provided with a conical second outer positioning portion; the inner sleeve comprises a first inner positioning portion, the lower end of which is provided with a conical second inner positioning portion, the lower end of which is provided with a cylindrical third inner positioning portion. The present invention replaces hollow screws with solid screws and guide devices, thereby increasing the strength of screw placement and improving surgical efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of minimally invasive spinal surgery, and in particular to an auxiliary guide device for inserting solid nails in minimally invasive spinal surgery. Background Art

[0002] Minimally invasive spinal surgery means avoiding large incisions under certain medical risks, using tiny incisions or puncture channels, using special instruments and devices, and reaching the lesion from the normal anatomical structure under the monitoring of imaging instruments or the guidance of navigation technology. Various miniature manual or electric instruments and equipment are used to complete the entire surgical process under visual conditions, with the goal of achieving smaller incisions, less tissue trauma, less bleeding, higher operating precision, definite results, and faster postoperative functional recovery than traditional or standard spinal surgery.

[0003] At present, in the process of minimally invasive spinal surgery, the guide pin is often inserted first and then the hollow screw is inserted along the guide pin. However, hollow screws have certain disadvantages: 1. The strength is not as good as solid screws; 2. The price is expensive. However, although solid screws are better than hollow screws, solid screws currently lack guide devices, making it difficult to implement the placement of solid screws in minimally invasive surgery. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides an auxiliary guiding device for the placement of solid nails in minimally invasive spinal surgery, so as to realize the placement of solid nails in minimally invasive spinal surgery.

[0005] The present invention provides an auxiliary guide device for the placement of solid nails in minimally invasive spinal surgery, comprising:

[0006] An outer sleeve; the outer sleeve comprises a cylindrical fixing portion, a cylindrical first outer positioning portion is provided at the lower end of the fixing portion, and a conical second outer positioning portion is provided at the lower end of the first outer positioning portion; the inner diameter of the first outer positioning portion is equal to the inner diameter of the fixing portion, and the large inner diameter of the second outer positioning portion is equal to the inner diameter of the first outer positioning portion;

[0007] The outer sleeve is composed of a left sleeve and a right sleeve, and the fixing part is composed of a left fixing part arranged on the left sleeve and a right fixing part arranged on the right sleeve; one or two latches are arranged at the end of the left fixing part, and a latch groove matching the latch is arranged on the right fixing part, and the latch groove is engaged with the latch groove;

[0008] The large inner diameter of the second outer positioning portion is larger than the outer diameter of the solid nail, and the small inner diameter of the second outer positioning portion is smaller than the outer diameter of the solid nail;

[0009] Inner sleeve; the inner sleeve comprises a first inner positioning portion, a conical second inner positioning portion is provided at the lower end of the first inner positioning portion, and a cylindrical third inner positioning portion is provided at the lower end of the second inner positioning portion; the inner diameters of the first inner positioning portion, the second inner positioning portion and the third inner positioning portion are equal; the inner sleeve is placed inside the outer sleeve, and the first inner positioning portion and the second inner positioning portion overlap with the first outer positioning portion and the second outer positioning portion respectively; the third inner positioning portion is placed outside the outer sleeve;

[0010] The inner diameter of the inner sleeve is greater than the outer diameters of the guide needle and the tap.

[0011] Preferably, the inner surface of the top of the first inner positioning portion is in an outwardly convex arc shape.

[0012] Preferably, the outer sleeve and the inner sleeve are both made by 3D printing.

[0013] Preferably, the implementation method of the device comprises the following steps:

[0014] S1, inserting the outer sleeve into the articular process;

[0015] S2, taking out a guide needle and placing it inside the inner sleeve, the guide needle drives the inner sleeve to reach the target bone surface, the inner sleeve is stuck in the articular process, and the guide needle is taken out;

[0016] S3, taking a tap and placing it inside the inner sleeve, and tapping the surface of the target bone along the inner sleeve;

[0017] S4. After the tapping is completed, take out the tap and the inner sleeve in turn;

[0018] S5, taking a solid nail and placing it inside the outer sleeve, and placing the nail on the surface of the target bone along the outer sleeve;

[0019] S6. As the solid nail is placed, the left sleeve and the right sleeve are gradually separated;

[0020] S7. After the solid nail is placed, remove the separated left sleeve and right sleeve.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention designs an outer sleeve and an inner sleeve, and the inner sleeve is positioned by detecting the surface of the traumatic bone through a guide needle. The positioned inner sleeve guides the tap to tap the surface of the traumatic bone. After tapping, the outer sleeve is used to guide the solid nail to place the nail on the surface of the traumatic bone, thereby achieving the purpose of guiding the placement of the solid nail.

[0023] 2. The present invention replaces hollow screws with solid nails and guide devices, which increases the strength of the nail placement and improves the efficiency of the operation. In addition, hollow screws are expensive, while the guide device in the present invention can be made using 3D printing technology, which greatly reduces the cost. After the present invention is widely used, it can bring huge economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 2 is a schematic cross-sectional view of an outer sleeve in an embodiment of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the left sleeve in an embodiment of the present invention.

[0027] Figure 3 It is a schematic structural diagram of the right sleeve in an embodiment of the present invention.

[0028] Figure 4 2 is a schematic cross-sectional view of an inner sleeve in an embodiment of the present invention.

[0029] Among them, 100-outer sleeve, 101-first outer positioning part, 102-second outer positioning part, 103-fixing part, 1031-left fixing part, 1032-right fixing part, 104-left sleeve, 105-right sleeve, 106-card, 107-card slot, 200-inner sleeve, 201-first inner positioning part, 202-second inner positioning part, 203-third inner positioning part. DETAILED DESCRIPTION

[0030] The following examples are provided for a better understanding of the present invention, but are not intended to limit the best mode of implementation, nor to limit the content and protection scope of the present invention. Any product identical or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior arts shall fall within the protection scope of the present invention. Example

[0031] Reference Figure 1-4 An auxiliary guide device for inserting solid screws in minimally invasive spinal surgery includes an outer sleeve 100 and an inner sleeve 200.

[0032] The outer sleeve 100 includes a cylindrical fixing portion 103, a cylindrical first external positioning portion 101 is provided at the lower end of the fixing portion 103, and a conical second external positioning portion 102 is provided at the lower end of the first external positioning portion 101; the inner diameter of the first external positioning portion 101 is equal to the inner diameter of the fixing portion 103, and the largest inner diameter of the second external positioning portion 102 is equal to the inner diameter of the first external positioning portion 101; the length of the first external positioning portion 101 is greater than the length of the second external positioning portion 102.

[0033] Furthermore, the outer sleeve 100 is composed of a left sleeve 104 and a right sleeve 105, and the fixing portion 103 is composed of a left fixing portion 1031 provided on the left sleeve 104 and a right fixing portion 1032 provided on the right sleeve 105; two symmetrically arranged latches 106 are provided at the end of the left fixing portion 1031, and two slots 107 matching the latches 106 are provided on the right fixing portion 1032, and the latches 106 are engaged with the slots 107, and both the latches 106 and the slots 107 are placed on the two outer sides of the first outer positioning portion 101.

[0034] Furthermore, the large inner diameter of the second outer positioning portion 102 is slightly larger than the outer diameter of the solid nail, and the small inner diameter of the second outer positioning portion 102 is slightly smaller than the outer diameter of the solid nail.

[0035] Since the outer diameter of the top of the solid nail is large, it is difficult to directly remove the outer sleeve along the solid nail. According to the above design, when the solid nail is gradually inserted along the outer sleeve 100, the left sleeve 104 and the right sleeve 105 will automatically separate under the pressure of the solid nail. At this time, the solid nail has been inserted more firmly, and the left sleeve 104 and the right sleeve 105 can be easily and quickly removed.

[0036] The inner sleeve 200 includes a first inner positioning portion 201, and the inner surface of the top of the first inner positioning portion 201 is in an outward convex arc shape to facilitate better detection by the guide needle; a conical second inner positioning portion 202 is provided at the lower end of the first inner positioning portion 201, and a cylindrical third inner positioning portion 203 is provided at the lower end of the second inner positioning portion 202; the inner diameters of the first inner positioning portion 201, the second inner positioning portion 202, and the third inner positioning portion 203 are equal; the inner sleeve 200 is placed inside the outer sleeve 100, and the first inner positioning portion 201 and the second inner positioning portion 202 coincide with the first outer positioning portion 101 and the second outer positioning portion 10 respectively; the third inner positioning portion 203 is placed outside the outer sleeve 100, and the first inner positioning portion 201 can be partially placed outside the outer sleeve 100; the inner diameter of the inner sleeve 200 is slightly larger than the outer diameters of the guide needle and the tap.

[0037] Furthermore, the size of the articular process is calculated based on the CT image, and the device is 3D printed. The implementation method of the device includes the following steps:

[0038] S1. Insert the outer sleeve 100 into the articular process. In actual operation, the outer sleeve 100 is usually inserted into the soft tissue of the articular process.

[0039] S2, take out the guide needle and place it inside the inner sleeve 200, the guide needle drives the inner sleeve 200 to reach the target bone surface (traumatic bone surface), the inner sleeve 200 is inserted into the soft tissue of the articular process through the third inner positioning portion 203, and the guide needle is taken out;

[0040] S3, taking a tap and placing it inside the inner sleeve 200, tapping the surface of the target bone along the inner sleeve 200 to expand the opening on the surface of the target bone and facilitate the insertion of the solid nail; at this time, the outer sleeve 100 can also be fine-tuned according to the position of the inner sleeve 200, so that the inner sleeve 200 is placed at the center of the outer sleeve 100;

[0041] S4, after the tapping is completed, the tap and the inner sleeve 200 are taken out in sequence;

[0042] S5, taking a solid nail and placing it inside the outer sleeve 100, and placing the nail on the surface of the target bone along the outer sleeve 100;

[0043] S6. As the solid nail is placed, the left sleeve 104 and the right sleeve 105 are gradually separated;

[0044] S7. After the solid nail is placed, the separated left sleeve 104 and right sleeve 105 are taken out.

[0045] In this embodiment, the inner sleeve 200 is positioned by detecting the surface of the traumatic bone through a guide needle. After being positioned, the inner sleeve 200 guides the tap to tap the surface of the traumatic bone. After tapping, the outer sleeve 100 is used to guide the solid nail to place the nail on the surface of the traumatic bone, thereby achieving the purpose of guiding the placement of the solid nail, and at the same time increasing the strength of the nail placement, improving the surgical efficiency, reducing the cost, and having huge economic benefits.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An auxiliary guide device for the placement of solid nails in minimally invasive spinal surgery, characterized in that: include: An outer sleeve; the outer sleeve comprises a cylindrical fixing portion, a cylindrical first outer positioning portion is provided at the lower end of the fixing portion, and a conical second outer positioning portion is provided at the lower end of the first outer positioning portion; the inner diameter of the first outer positioning portion is equal to the inner diameter of the fixing portion, and the large inner diameter of the second outer positioning portion is equal to the inner diameter of the first outer positioning portion; The outer sleeve is composed of a left sleeve and a right sleeve, and the fixing part is composed of a left fixing part arranged on the left sleeve and a right fixing part arranged on the right sleeve; one or two latches are arranged at the end of the left fixing part, and a latch groove matching the latch is arranged on the right fixing part, and the latch groove is engaged with the latch groove; The large inner diameter of the second outer positioning portion is larger than the outer diameter of the solid nail, and the small inner diameter of the second outer positioning portion is smaller than the outer diameter of the solid nail; Inner sleeve; the inner sleeve comprises a first inner positioning portion, a conical second inner positioning portion is provided at the lower end of the first inner positioning portion, and a cylindrical third inner positioning portion is provided at the lower end of the second inner positioning portion; the inner diameters of the first inner positioning portion, the second inner positioning portion and the third inner positioning portion are equal; the inner sleeve is placed inside the outer sleeve, and the first inner positioning portion and the second inner positioning portion coincide with the first outer positioning portion and the second outer positioning portion respectively; the third inner positioning portion is placed outside the outer sleeve; the inner surface of the top of the first inner positioning portion is in an outward convex arc shape; The inner diameter of the inner sleeve is larger than the outer diameters of the guide pin and the tap; the outer sleeve and the inner sleeve are both made by 3D printing; The implementation method of the device comprises the following steps: S1, inserting the outer sleeve into the articular process; S2, taking out a guide needle and placing it inside the inner sleeve, the guide needle drives the inner sleeve to reach the target bone surface, the inner sleeve is stuck in the articular process, and the guide needle is taken out; S3, taking a tap and placing it inside the inner sleeve, and tapping the surface of the target bone along the inner sleeve; S4. After the tapping is completed, take out the tap and the inner sleeve in turn; S5, taking a solid nail and placing it inside the outer sleeve, and placing the nail on the surface of the target bone along the outer sleeve; S6. As the solid nail is placed, the left sleeve and the right sleeve are gradually separated; S7. After the solid nail is placed, remove the separated left sleeve and right sleeve.

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