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CN-122005000-A - Pelvis fracture external fixation frame fixed iliac crest nail placement guider and use method thereof

CN122005000ACN 122005000 ACN122005000 ACN 122005000ACN-122005000-A

Abstract

The invention relates to a nail-placing guide device for fixing an iliac crest of an external fixation frame for pelvic fracture and a use method thereof, wherein the guide device comprises a drilling guide tube, an auxiliary guide column and a connecting structure; the connecting structure comprises a connecting piece, a first puncture needle and a second puncture needle which is identical to the first puncture needle in structure, wherein a drilling guide tube and an auxiliary guide column are respectively fixed at two ends of the connecting piece, one ends of the two puncture needles are of a pointed cone structure, the other ends of the two puncture needles are fixedly arranged on one side of the auxiliary guide column, the connecting piece and the two puncture needles are parallel to each other, and the length of the connecting piece is identical to that of the two puncture needles. The optimal nail feeding point is precisely positioned through the guide device, and the Schanz nail is guided to run in cancellous bone between the inner and outer ilium plates all the time by combining with a probe open method, so that the aims of improving the accuracy of nail placement, increasing the fixing strength, reducing complications, shortening the operation time and reducing the medical cost are finally achieved.

Inventors

  • JIAN ZHENGGUANG

Assignees

  • 苏州瑞华骨科医院有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. 1. A nail-placing guider for fixing an iliac crest of an external fixation frame for pelvic fracture, which is characterized by comprising a drilling guide tube, an auxiliary guide column and a connecting structure; The connecting structure comprises a connecting piece, a first puncture needle and a second puncture needle which is the same as the first puncture needle in structure; Drilling guide pipes and auxiliary guide columns are respectively fixed at two ends of the connecting piece; One end of each puncture needle is in a pointed cone structure, and the other ends of the two puncture needles are fixedly arranged on one side of the auxiliary guide column; the connecting piece and the two puncture needles are parallel to each other.
  2. 2. The external fixation device for pelvic fracture fixation of iliac crest fixation screw guide of claim 1, wherein the length of said connector is consistent with the length of two piercing needles.
  3. 3. The external fixation device for pelvic fracture fixation of iliac crest fixation guide according to claim 2, wherein a distance between said two piercing needles is 2 times a distance between the connector and the first piercing needle; the diameter of the connecting piece is 2 times of the diameters of the two puncture needles.
  4. 4. A use method of a nail-placing guider for a pelvic fracture external fixation frame for fixing an iliac crest is characterized in that, a staple guide for use in the external fixation frame for pelvic fractures of any of claims 1-3, the method comprising: Penetrating the guide into a preset position; after penetrating into the preset position, drilling operation is carried out at the pointing position of the drilling guide tube of the guide device, so as to form drilling holes; Deepening the drilled hole to a preset drilling depth to form a nail channel; expanding the nail channel to a preset nail channel diameter to form a nail channel to be placed; And screwing the preset nails into the nail channels to be nailed to the preset nail depth.
  5. 5. The method of using the pelvic fracture external fixation device for fixation of an iliac crest fixation screw guide of claim 4, wherein the preset positions comprise at least a first preset position and a second preset position; the first preset position is a position which is located behind the anterior superior iliac spine and is penetrated by a first distance and is close to the outer edge of the iliac crest; the second preset position is a position which is penetrated by a second distance behind the anterior superior iliac spine and is close to the outer edge of the iliac crest.
  6. 6. The method of claim 5, wherein the drilling guide tube has an inner diameter matching an outer diameter of the bone cone, wherein the drilling operation is performed at the position pointed by the drill guide tube of the guide, and wherein the forming the drill hole comprises: Cutting the whole layer until reaching the surface of the iliac crest at the pointing position of the drilling guide tube; drilling through the cortical bone on the surface of the iliac crest according to the pointing position of the drilling guide tube by using a bone cone, and establishing a drilling hole; the bone awl and the drill guide are sequentially pulled out to form a drill.
  7. 7. The method of using the external fixation device for pelvic fracture to fix the iliac crest screw guide of claim 6, wherein the drilling the hole deepening to a predetermined hole depth to form the screw channel comprises: Inserting a probe from the borehole; pushing the probe along a preset planning direction so that the probe penetrates into a preset drilling depth; The probe is withdrawn to form the tack tract.
  8. 8. The method of using the pelvic fracture external fixation device for iliac crest fixation of a nail guide according to claim 7, wherein said enlarging the nail tract to a predetermined nail tract diameter is performed prior to forming the nail tract to be placed, said method further comprising: judging whether the actual insertion depths of the probes are consistent with the preset nail lengths or not: if yes, recording the insertion depth values of the first probe and the second probe, and executing the subsequent steps; Otherwise, the actual insertion depth of the probe is adjusted, and the judgment of whether the actual insertion depths of the probe are consistent with the preset nail length is re-executed.
  9. 9. The method of using the external fixation device for pelvic fracture iliac crest fixation screw guide according to claim 8, wherein said expanding the screw channel to a predetermined screw channel diameter to form a screw channel to be placed comprises: Inserting along the nail path through a nail path expander; advancing the lane expander to a preset position so that the lane is expanded to a preset lane diameter; the nail channel expander is pulled out to form the nail channel to be placed.
  10. 10. The method of using the external fixation device for pelvic fracture ilium fixation nail guide of claim 9, wherein after the enlarging the nail tract to a preset nail tract diameter to form the nail tract to be placed, the method further comprises: Inserting the probe into the nail channel to be placed until the bottom of the nail channel is reached; And (3) pulling out the probe, and scraping the bone walls on the inner side and the outer side of the nail channel through the round head at the front end of the probe in the process of pulling out the probe so as to ensure that the whole process of the nail channel is positioned in a preset range.

Description

Pelvis fracture external fixation frame fixed iliac crest nail placement guider and use method thereof Technical Field The invention relates to the technical field of medical instruments, in particular to the technical field of auxiliary instruments for orthopedic surgery, and in particular relates to a nail-placing guider for fixing an iliac crest of an external fixation frame for pelvic fracture and a use method. Background External fixation is an important temporary or final fixation modality in emergency treatment of pelvic fractures. Among them, accurate and firm placement of Schanz nails into the ilium is critical to the success of the procedure. However, the ilium morphology is irregular, the thickness is not uniform, and most bones except the iliac crest are not accessible or directly visible from the body surface. Therefore, how to improve the accuracy and safety of the nail placement is always a difficult point and development direction in the technical field. At present, although a plurality of nail placing methods exist clinically, the methods have obvious defects, and the clinical requirements of accuracy, minimally invasive, convenience and low cost cannot be met. The existing nail placing method mainly comprises the following three steps: firstly, a traditional direct electric drill drilling nail placing method, namely an operator only depends on the iliac crest touched by the body surface as a reference, clinical experience and hand feeling are completely relied on, and a Schanz nail is directly drilled into the iliac bone by an electric drill, but the method is very easy to penetrate out of the bone due to incapability of directly viewing the internal structure and trend of the bone, so that the fixation is unstable and loose, nail tract infection is caused, external fixation failure is finally caused, the accuracy is low, and the experience requirement on the operator is very high; As shown in figure 1, at the position A, the same nail feeding point has different nail feeding angles, only the path B can reach an ideal position, at the position of figure 1-B, the nail feeding point has the same angle, the position of the nail feeding point is different, and only the path B can reach the ideal position, so that the influence of different nail feeding points and directions on the Schanz nail position is very large, the probability that the Schanz nail can be directly drilled into the iliac crest by an electric drill through the skin is very low, and as shown in figure 2, chanz nails are not placed in the ideal position, and only a small part of the nails are positioned in bones, so that the fixation is unstable. The method II, cut and expose and put the nail method, namely through the operation incision, peel off the soft tissue extensively, expose the inner plate of ilium, bore chanz nails under the direct vision, but it causes the operation wound to be big, has increased the bleeding and risk of infecting in the operation, and even if there is above-mentioned risk, because ilium itself is thinner, schanz nail still wears out the risk, and the postoperative scar is big, the patient resumes slowly; The method three comprises the steps of 3D printing an individualized guide plate to assist in nail placement, namely 3D printing the individualized guide plate attached to the surface of ilium according to CT data of a patient before operation, placing the guide plate on the bone surface during operation, and placing nails through guide holes in the guide plate. Accordingly, there is a need in the art for a new external fixation device for pelvic fractures to fix the iliac crest staple guides and guide solutions to address the above-described problems. Disclosure of Invention Based on the above, the invention provides a nail-placing guide for the external fixation rack for pelvic fracture to fix the iliac crest and a use method thereof, which solve the technical problem that the prior art cannot simultaneously meet the requirements of precision, minimally invasive, aging and cost. According to a first aspect of the present invention there is provided a pelvic fracture external fixation mount fixation iliac crest staple guide comprising a drill guide tube, an auxiliary guide post and a connecting structure; The connecting structure comprises a connecting piece, a first puncture needle and a second puncture needle which is the same as the first puncture needle in structure; Drilling guide pipes and auxiliary guide columns are respectively fixed at two ends of the connecting piece; One end of each puncture needle is in a pointed cone structure, and the other ends of the two puncture needles are fixedly arranged on one side of the auxiliary guide column; the connecting piece and the two puncture needles are parallel to each other. According to an embodiment of the invention, the length of the connector corresponds to the length of two piercing needles. According to an embodiment of the invention, the