Intramedullary guide needle guider

Abstract

The utility model relates to the technical field of medical instruments, in particular to an intramedullary guide needle guider which comprises an annular frame, a positioning column is fixedly arranged at the bottom of the annular frame, a guide assembly used for guiding a guide wire to penetrate into bone marrow is fixedly arranged at the top of the annular frame, and a vertically-arranged fixing rod is fixedly arranged on the inner side of the annular frame. The guide assembly comprises a fixed cylinder fixedly arranged at the top of the annular frame, an adjusting bolt is in threaded connection with the outer wall of the fixed cylinder, an adjusting column is movably connected into the fixed cylinder, distance scales are arranged on the outer wall of the adjusting column, a guide column perpendicular to the adjusting column is fixedly arranged at the end, located outside the fixed cylinder, of the adjusting column, and a guide hole is formed in the guide column; according to the intramedullary guide needle guider, the correct needle inserting direction can be determined, the puncture frequency and the perspective frequency in an operation are reduced, the radiation dosage to a patient is reduced, the operation time is shortened, the bleeding amount is reduced, the operation risk is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an intramedullary guide needle guide. Background Technique

[0002] For the surgical treatment of humeral shaft and femoral shaft fractures by orthopedic surgeons, it is currently popular to use intramedullary nails to fix fractures. Before using the intramedullary nail, a guide needle needs to be inserted into the bone marrow of the humerus or femur. The guide needle needs to be located at the center of the bone marrow. After the puncture position of the guide needle is satisfactory, the intramedullary nail is implanted into the medullary cavity of the bone through the guide needle. At present, the entry point of the guide needle can be determined, but the direction control is inaccurate and it is easy to deflect, resulting in a large number of punctures and a large number of C-arm fluoroscopies. Therefore, there will be problems such as extended operation time, increased bleeding volume, and increased radiation dose received by patients. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides an intramedullary guide needle guide, which solves the technical problem of inaccurate control of the penetration direction of the guide needle.

[0004] To solve the above technical problems, the utility model provides the following technical solutions: an intramedullary guide needle guide, including an annular frame, a positioning column is fixedly arranged at the bottom of the annular frame, and a guide assembly for guiding a guide wire into the bone marrow is fixedly arranged at the top. A vertically arranged fixing rod is fixedly arranged inside the annular frame;

[0005] The guide assembly includes a fixed cylinder fixedly arranged at the top of the annular frame. An adjusting bolt is threadedly connected to the outer wall of the fixed cylinder. An adjusting column is movably connected inside the fixed cylinder. A distance scale is arranged on the outer wall of the adjusting column. One end of the adjusting column outside the fixed cylinder is fixedly provided with a guide column perpendicular to it. A guide hole is arranged on the guide column.

[0006] Preferably, a plurality of pin holes are formed in the positioning column, and pins are inserted into the pin holes.

[0007] Preferably, a plurality of equally spaced perforations one and perforations two are respectively formed in the annular frame and the fixing rod, and the perforations one and perforations two are on the same horizontal line.

[0008] Preferably, the diameters of the perforations one and perforations two are 1.5 mm to 2 mm.

[0009] Preferably, a limiting slider is fixedly arranged at one end of the adjusting column inside the fixed cylinder, and the limiting slider is slidably arranged in a limiting chute formed on the inner wall of the fixed cylinder.

[0010] Preferably, an installation groove is arranged inside the top of the annular frame, and a limiting ring is detachably installed in the installation groove through a fixing bolt.

[0011] With the above technical solutions, the present utility model provides an intramedullary guide needle guide, which has at least the following beneficial effects:

[0012] 1. For this intramedullary guide needle guide, by setting a guiding component, the guide wire can be guided to penetrate into the bone marrow through the guiding column. At the same time, multiple Kirschner wires are sequentially penetrated into the first perforation and the second perforation and fixed on the bone, so as to determine the penetration direction of the guide wire through X-ray imaging, and then determine the correct needle insertion direction, reducing the number of punctures and fluoroscopies during the operation, reducing the fluoroscopy times to lower the radiation dose to the patient, reducing the operation time and blood loss, reducing the surgical risk, and improving the surgical efficiency.

[0013] 2. For this intramedullary guide needle guide, by setting a limiting ring and a fixing bolt, the position of the annular frame can be restricted in the front-back direction to avoid deviation of the guiding direction, and the detachable limiting ring facilitates storage and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of this application:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the whole of the present utility model;

[0016] Figure 2 It is a structural schematic diagram of the connection between the annular frame and the limiting ring of the present utility model;

[0017] Figure 3 It is a structural schematic diagram of the guiding component of the present utility model.

[0018] Reference Numerals:

[0019] 1. Annular frame; 11. First perforation; 12. Installation groove; 2. Positioning column; 21. Pin hole; 3. Pin; 4. Fixed rod; 41. Second perforation; 5. Guiding component; 51. Fixed cylinder; 511. Limiting sliding groove; 52. Adjusting column; 53. Limiting slider; 54. Distance scale; 55. Adjusting bolt; 56. Guiding column; 561. Guiding hole; 6. Limiting ring; 7. Fixed bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] During the operation, the intramedullary guide needle introducer can puncture through soft tissues and bone structures to the target position, providing stable guidance for the intramedullary guide needle. Under the guidance of X-ray images or real-time images, the doctor uses the introducer to safely implant the intramedullary guide needle into the designated position. By using the intramedullary guide needle introducer, it can help the doctor accurately locate the surgical target, reduce the surgical risk, and improve the accuracy and success rate of the operation.

[0022] Based on the technical defect of inaccurate control of the penetration direction of the guide needle in the existing technology, please refer to Figures 1-3 , a kind of intramedullary guide needle introducer provided by the utility model can determine the correct needle insertion direction, reduce the number of punctures and fluoroscopies during the operation, reduce the fluoroscopy times to reduce the radiation dose to the patient, reduce the operation time and blood loss, reduce the surgical risk, and improve the operation efficiency. The introducer includes an annular frame 1, a positioning column 2 is fixedly arranged at the bottom of the annular frame 1, and a guiding component 5 for guiding the guide wire into the bone marrow is fixedly arranged at the top. A vertically arranged fixing rod 4 is fixedly arranged inside the annular frame 1; the whole is fixed on the bone by using the positioning column 2, and then the guide wire is passed through the guiding component 5 into the bone marrow. At the same time, multiple Kirschner wires are sequentially passed through the first perforation 11 and the second perforation 41 and fixed on the bone, so as to determine the penetration direction of the guide wire.

[0023] To achieve the guiding effect on the guide wire, please refer to Figure 3 , the guiding component 5 includes a fixing cylinder 51 fixedly arranged at the top of the annular frame 1. An adjusting bolt 55 is threadedly connected to the outer wall of the fixing cylinder 51. An adjusting column 52 is movably connected inside the fixing cylinder 51. A distance scale 54 is arranged on the outer wall of the adjusting column 52. One end of the adjusting column 52 outside the fixing cylinder 51 is fixedly provided with a guiding column 56 perpendicular to it. A guiding hole 561 is arranged on the guiding column 56; the position of the guiding column 56 can be accurately adjusted through the adjusting bolt 55 and the distance scale 54, and then the guide wire is passed through the guiding hole 561 and into the bone marrow.

[0024] To achieve the fixation of the whole, a plurality of pin holes 21 are opened on the positioning column 2, and pins 3 are inserted into the pin holes 21; the positioning column 2 can be installed and fixed by using the pins 3.

[0025] To determine the penetration direction of the guide wire, a plurality of equally spaced first perforations 11 and second perforations 41 are respectively opened on the annular frame 1 and the fixing rod 4. The first perforations 11 and the second perforations 41 are on the same horizontal line; multiple Kirschner wires are sequentially passed through the first perforations 11 and the second perforations 41 and fixed on the bone, so as to determine the penetration direction of the guide wire.

[0026] To ensure that the Kirschner wire can be smoothly penetrated, the diameters of the first perforation 11 and the second perforation 41 are 1.5 mm to 2 mm; since the diameter of the Kirschner wire is 1.5 mm, the first perforation 11 and the second perforation 41 with such a diameter can ensure the smooth penetration of the Kirschner wire.

[0027] To ensure that the adjusting column 52 does not rotate when adjusting its length, a limiting slider 53 is fixedly arranged at one end of the adjusting column 52 inside the fixed cylinder 51, and the limiting slider 53 is slidably arranged in a limiting chute 511 formed on the inner wall of the fixed cylinder 51; by the action of the limiting slider 53 and the limiting chute 511, the rotation of the adjusting column 52 can be restricted.

[0028] To limit the position of the annular frame 1 in the front-back direction, an installation groove 12 is provided inside the top of the annular frame 1, and a limiting ring 6 is detachably installed in the installation groove 12 through a fixing bolt 7; by setting the limiting ring 6, the position of the annular frame 1 can be restricted in the front-back direction to avoid deviation of the guiding direction, and under the action of the fixing bolt 7, the limiting ring 6 can be detached, which is convenient for storage and replacement.

[0029] As can be seen from the above embodiments: the whole is fixed on the bone by using the positioning post 2, and then under the action of the guiding assembly 5, first, the position of the guiding post 56 can be accurately adjusted through the adjusting bolt 55 and the distance scale 54, then the guide wire passes through the guiding hole 561 and enters the bone marrow, and at the same time, multiple Kirschner wires are sequentially inserted into the first through hole 11 and the second through hole 41 and fixed on the bone, so as to determine the penetration direction of the guide wire through the X-ray image, and then the correct needle insertion direction can be determined.

[0030] It should be noted that the term "comprise", "include" or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0031] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intramedullary guide needle guide, comprising an annular frame (1), characterized in that: The bottom of the annular frame (1) is fixedly provided with a positioning column (2), the top is fixedly provided with a guide assembly (5) for guiding the guide wire to penetrate into the bone marrow, and the inner side of the annular frame (1) is fixedly provided with a vertically arranged fixing rod (4); The guide assembly (5) comprises a fixed cylinder (51) fixedly mounted on the top of the annular frame (1); an adjusting bolt (55) is threadedly connected to the outer wall of the fixed cylinder (51); an adjusting column (52) is movably connected inside the fixed cylinder (51); a distance scale (54) is provided on the outer wall of the adjusting column (52); a guide column (56) is fixedly mounted on one end of the adjusting column (52) outside the fixed cylinder (51) and is perpendicular to the adjusting column (52); and a guide hole (561) is provided on the guide column (56).

2. The intramedullary guide needle guide according to claim 1, characterized in that: The positioning column (2) is provided with a plurality of pin holes (21), and pins (3) are inserted into the pin holes (21).

3. The intramedullary guide needle guide according to claim 1, characterized in that: The annular frame (1) and the fixed rod (4) are respectively provided with a plurality of equally spaced first through holes (11) and second through holes (41), and the first through holes (11) and the second through holes (41) are located on the same horizontal line.

4. The intramedullary guide needle guide according to claim 3, characterized in that: The diameters of the first perforation (11) and the second perforation (41) are 1.5 mm to 2 mm.

5. The intramedullary guide needle guide according to claim 1, characterized in that: A limiting slide block (53) is fixedly provided on one end of the adjusting column (52) located inside the fixed cylinder (51), and the limiting slide block (53) is slidably arranged in a limiting slide groove (511) provided on the inner wall of the fixed cylinder (51).

6. The intramedullary guide needle guide according to claim 1, characterized in that: A mounting groove (12) is provided on the inner side of the top of the annular frame (1), and a limit ring (6) is detachably mounted in the mounting groove (12) via a fixing bolt (7).

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