Anterior column intramedullary nail for pelvis percutaneous internal fixation

Abstract

The utility model relates to an anterior column intramedullary nail for pelvis percutaneous internal fixation, which belongs to the technical field of orthopedic medical instruments and is characterized in that the front end of the anterior column intramedullary nail is cut to form a cut surface to form a tip; the anterior column intramedullary nail is arc-shaped, so that the anterior column intramedullary nail can conveniently penetrate along the suprapubis ramus and part of the ilium; the surface of the anterior column intramedullary nail is smooth so as to be prevented from penetrating into an articular cavity; a hollow channel is formed in the anterior column intramedullary nail, penetrates through the two ends of the anterior column intramedullary nail and is used for allowing an anterior column nail guide pin to penetrate through so that the anterior column intramedullary nail can penetrate into the suprapubis ramus and part of the ilium. The anterior column intramedullary nail for percutaneous internal fixation of the pelvis disclosed by the utility model can be matched with an in-vitro guide frame for percutaneous internal fixation and reinforcement of the intramedullary nail around the acetabulum for use, assists the anterior column intramedullary nail to be percutaneously fixed around the acetabulum, and is suitable for penetrating through an anterior column nail guide tube of the in-vitro guide frame and only penetrating into suprapubic ramus and part of ilium; and popularization and application of pelvic metastatic carcinoma surgery are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic medical instruments, in particular to an anterior column intramedullary nail for percutaneous internal fixation of the pelvis. Background Art

[0002] With the development of diagnosis and treatment technology for malignant tumors, the number of patients with bone metastasis is increasing year by year. The pelvis and acetabulum are important cross-linking sites of the human body's motor system and are also common sites for bone metastasis. Once the tumor metastasizes to the acetabulum, pelvic metastasis often causes significant pain and limited mobility, manifested as severe pain, limited movement, inability to walk, decreased quality of life, pathological fractures and loss of mobility, leading to interruption of systemic treatment, seriously affecting the patient's quality of life, and even accelerating death.

[0003] The invention application with application number 202311786273.9 discloses an extracorporeal guide frame for percutaneous internal fixation of the acetabulum to strengthen the intramedullary nail. It solves the problems of long operation time, high incidence of surgical complications and wound complications, slow patient recovery, etc. in the existing treatment methods of metastatic cancer around the acetabulum due to the use of traditional surgery, as well as the high technical difficulty, long learning curve, and low tolerance for complications of manual tripod-like internal fixation to strengthen the intramedullary nail surgery. It significantly improves surgical accuracy, reduces surgical technical difficulty, shortens operation time, and thus benefits patients.

[0004] However, the invention application with application number 202311786273.9 discloses an extracorporeal guide frame for percutaneous internal fixation around the acetabulum to strengthen the intramedullary nail, which can assist the intramedullary nail to be percutaneously fixed around the acetabulum, but it also requires a matching intramedullary nail. Only the intramedullary nail and the extracorporeal guide frame can be used together to realize the percutaneous placement of the intramedullary nail into the body and internal fixation around the acetabulum. However, there is currently no special anterior column intramedullary nail for pelvic anterior column bone metastasis on the market, which is suitable for passing through the anterior column nail catheter of the extracorporeal guide frame and only penetrates the superior pubic ramus and part of the ilium, which restricts the promotion and application of minimally invasive surgery for pelvic bone metastasis. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide an anterior column intramedullary nail for percutaneous internal fixation of the pelvis, which is used to solve the problem that there is currently no special anterior column intramedullary nail for pelvic anterior column bone metastasis on the market, which is suitable for passing through the anterior column nail catheter of an extracorporeal guide frame and only penetrates the superior pubic branch and part of the ilium, restricting the promotion and application of minimally invasive surgical operations for pelvic bone metastasis.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model discloses an anterior column intramedullary nail for percutaneous fixation of the pelvis, wherein the front end of the anterior column intramedullary nail is cut to form a cutting surface to form a tip; the shape of the anterior column intramedullary nail is arc-shaped, so as to pass along the superior pubic branch and part of the ilium; the surface of the anterior column intramedullary nail is smooth to prevent it from penetrating into the joint cavity; a hollow channel is arranged inside the anterior column intramedullary nail and the hollow channel passes through both ends of the anterior column intramedullary nail, and is used for inserting a front column nail guide needle, so that the anterior column intramedullary nail can penetrate the superior pubic branch and part of the ilium.

[0008] Preferably, the tail end of the anterior column intramedullary nail is designed as an enlarged end, and the enlarged end of the tail end of the anterior column intramedullary nail is configured with a tail cap. The outer wall of the tail cap is provided with a tight thread for firmly fixing it on the cortical bone. The enlarged end of the tail end of the anterior column intramedullary nail is connected to the tail cap by a thread.

[0009] Preferably, the tail cap includes a screw portion and a nut portion, the screw portion and the nut portion are fixedly connected, and the outer wall of the nut portion is provided with a tight thread for fixing to the cortical bone; the outer wall of the screw portion is provided with an external thread, and the inner wall of the enlarged end of the tail end of the anterior column intramedullary nail is provided with an internal thread, and the screw portion of the tail cap is screwed into the enlarged end of the tail end of the anterior column intramedullary nail to achieve a threaded connection between the two; a hexagonal hole is provided on the end face of the tail cap away from the screw portion, for inserting a hexagonal tool to tighten the tail cap to fix the tail cap to the cortical bone.

[0010] Preferably, the enlarged end of the tail of the anterior column intramedullary nail is also provided with a ferrule, and at least two cards are arranged on the ferrule, and at least two cards are evenly spaced and circumferentially arranged on the ferrule, and the enlarged end of the tail of the anterior column intramedullary nail is provided with at least two card slots; the ferrule is used to be sleeved on the docking end of the delivery tool of the anterior column intramedullary nail; when the docking end of the delivery tool of the anterior column intramedullary nail is docked with the enlarged end of the tail of the anterior column intramedullary nail, the ferrule is slid to the enlarged end of the tail of the anterior column intramedullary nail, and the card of the ferrule is just snapped into the card slot of the enlarged end of the tail of the anterior column intramedullary nail.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a front column intramedullary nail for percutaneous internal fixation of the pelvis. Aiming at the specific characteristics of the superior pubic ramus and part of the ilium of the human body, the front end of the front column intramedullary nail is cut to form a cutting surface to form a tip; the shape of the front column intramedullary nail is designed to be arc-shaped, so as to pass along the superior pubic ramus and part of the ilium; the surface of the front column intramedullary nail is smooth to prevent it from penetrating into the joint cavity; a hollow channel is arranged inside the front column intramedullary nail and the hollow channel runs through both ends of the front column intramedullary nail, which is used to insert a front column nail guide needle so that the front column intramedullary nail penetrates the superior pubic ramus and part of the ilium. The front column intramedullary nail for percutaneous internal fixation of the pelvis disclosed by the utility model can be used in conjunction with an extracorporeal guide frame for percutaneous internal fixation and strengthening of intramedullary nails around the acetabulum, and assists in percutaneous fixation of the front column intramedullary nail around the acetabulum, and is suitable for passing through the front column nail catheter of the extracorporeal guide frame and only penetrating the superior pubic ramus and part of the ilium, which is conducive to the promotion and application of surgical operations for pelvic bone metastasis cancer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front view of the anterior column intramedullary nail for percutaneous internal fixation of the pelvis provided in Example 1 of the utility model;

[0014] Figure 2 This is a back view of the anterior column intramedullary nail for percutaneous pelvic fixation provided in Example 1 of the utility model;

[0015] Figure 3 This is a schematic diagram of the anterior column intramedullary nail and the tail cap used in combination for pelvic percutaneous internal fixation provided in Example 1 of the utility model;

[0016] Figure 4 yes Figure 3 A partial enlarged view of the anterior column intramedullary nail and the tail cap used in combination for percutaneous pelvic fixation;

[0017] Figure 5 This is a schematic diagram of the structure of a ferrule configured at the enlarged end of the tail of the anterior column intramedullary nail provided in Example 1 of the utility model;

[0018] Figure 6 It is a top view of the enlarged end of the tail portion of the anterior column intramedullary nail provided by Example 1 of the utility model;

[0019] Figure 7 It is a schematic diagram of the anterior column intramedullary nail of the pelvic percutaneous internal fixation provided by Example 1 of the utility model penetrating into the pelvis.

[0020] Explanation of the reference numerals: 1-anterior column intramedullary nail, 11-enlarged end; 2-tail cap; 3-ferrule, 30-card, 31-card slot; 100-hollow channel. DETAILED DESCRIPTION

[0021] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0022] In order to solve the problem that there is no special anterior column intramedullary nail for pelvic anterior column bone metastasis cancer on the market, which is suitable for passing through the anterior column nail catheter of an extracorporeal guide frame and only penetrates the superior pubic ramus and part of the ilium, restricting the promotion and application of minimally invasive surgical operations for pelvic bone metastasis cancer, the utility model provides an anterior column intramedullary nail for pelvic percutaneous internal fixation. According to the specific superior pubic ramus and part of the ilium of the human body, the front end of the anterior column intramedullary nail is cut to form a cutting surface to form a tip; the shape of the anterior column intramedullary nail is designed to be arc-shaped, so as to pass along the superior pubic ramus and part of the ilium; the surface of the anterior column intramedullary nail is smooth to prevent it from penetrating into the joint cavity; a hollow channel is arranged inside the anterior column intramedullary nail and the hollow channel runs through both ends of the anterior column intramedullary nail, which is used to penetrate the anterior column nail guide needle so that the anterior column intramedullary nail penetrates the superior pubic ramus and part of the ilium. The anterior column intramedullary nail for pelvic percutaneous internal fixation disclosed by the utility model can be used in conjunction with an extracorporeal guide frame for percutaneous internal fixation reinforcement of the intramedullary nail around the acetabulum to assist in the percutaneous fixation of the anterior column intramedullary nail around the acetabulum. The anterior column nail is suitable for passing through a guide tube of the extracorporeal guide frame and only penetrates the superior pubic branch and part of the ilium, which is beneficial to the promotion and application of surgical operations for pelvic bone metastasis cancer.

[0023] Example 1: Anterior column intramedullary nail for percutaneous fixation of the pelvis

[0024] Embodiment 1 of the present invention provides an anterior column intramedullary nail for percutaneous internal fixation of the pelvis, and its structure and connection relationship are described in detail below in conjunction with the accompanying drawings.

[0025] refer to Figures 1 to 4 The front end of the anterior column intramedullary nail 1 of the pelvic percutaneous fixation is cut to form a cutting surface to form a tip; the shape of the anterior column intramedullary nail 1 is arc-shaped, so as to pass along the superior pubic branch and part of the ilium; the surface of the anterior column intramedullary nail 1 is smooth to prevent it from penetrating into the joint cavity; a hollow channel 100 is provided inside the anterior column intramedullary nail 1 and the hollow channel 100 passes through both ends of the anterior column intramedullary nail 1, which is used to insert a front column nail guide needle so that the anterior column intramedullary nail 1 can penetrate the superior pubic branch and part of the ilium.

[0026] In order to prevent the nail from backing out, the tail end of the anterior column intramedullary nail 1 is designed as an enlarged end 11, and the enlarged end 11 of the tail end of the anterior column intramedullary nail 1 is configured with a tail cap 2. The outer wall of the tail cap 2 is provided with a tight thread for firmly fixing it on the cortical bone. The enlarged end 11 of the tail end of the anterior column intramedullary nail 1 is connected to the tail cap 2 by threads.

[0027] As a specific implementation method for realizing the threaded connection between the anterior column intramedullary nail 1 and the tail cap 2, the tail cap 2 includes a screw portion and a nut portion, the screw portion and the nut portion are fixedly connected, and the outer wall of the nut portion is provided with a tight thread for fixing on the cortical bone; the outer wall of the screw portion is provided with an external thread, and the inner wall of the enlarged end 11 of the tail end of the anterior column intramedullary nail 1 is provided with an internal thread, and the screw portion of the tail cap 2 is screwed into the enlarged end 11 of the tail end of the anterior column intramedullary nail 1 to realize the threaded connection between the two; a hexagonal hole is provided on the end face of the tail cap 2 away from the screw portion, which is used to penetrate the hexagonal tool to tighten the tail cap 2 to fix the tail cap 2 on the cortical bone.

[0028] In order to ensure that the screw portion of the tail cap 2 can be smoothly screwed into the hollow channel of the tail end of the anterior column intramedullary nail 1, preferably, the tail end of the anterior column intramedullary nail 1 connected to the screw portion of the tail cap 2 by threads is thicker than the middle and front parts.

[0029] More specifically, different models are designed according to different lengths, and different models are designed according to different diameters, that is, there are intramedullary nails of different lengths and thicknesses.

[0030] In order to achieve docking with the delivery tool of the anterior column intramedullary nail, the enlarged end 11 of the tail end of the anterior column intramedullary nail 1 is provided with an internal thread on the inner wall, and the enlarged end 11 of the tail end of the anterior column intramedullary nail 1 of the pelvic percutaneous internal fixation is also equipped with a ferrule 3.

[0031] refer to Figure 5 and Figure 6 The ferrule 3 is provided with at least two cards 30, and the at least two cards 30 are evenly spaced and circumferentially arranged on the ferrule 3, and the enlarged end 11 of the tail of the anterior column intramedullary nail 1 is provided with at least two card slots 31;

[0032] The ferrule 3 is used to be sleeved on the butt end of the delivery tool of the anterior column intramedullary nail 1.

[0033] When the butt end of the delivery tool of the anterior column intramedullary nail 1 is butted against the enlarged end 11 of the tail of the anterior column intramedullary nail 1, the ferrule 3 is slid to the enlarged end 11 of the tail of the anterior column intramedullary nail 1, and the card 30 of the ferrule 3 is just snapped into the card slot 31 of the enlarged end 11 of the tail of the anterior column intramedullary nail 1.

[0034] Specifically, the delivery tool of the front column intramedullary nail includes a front column intramedullary nail joint, a screw cap is arranged on the front column intramedullary nail joint, and the outer wall of the screw cap is arranged with an external thread, which is used to be fixedly connected with the enlarged end 11 of the tail end of the front column intramedullary nail 1 through a thread. The ferrule 3 is sleeved on the front column intramedullary nail joint, and when the front column intramedullary nail joint is tightened with the enlarged end 11 of the tail of the front column intramedullary nail 1, the ferrule 3 is slid to the enlarged end 11 of the tail of the front column intramedullary nail 1, and the card 30 of the ferrule 3 is just snapped on the card slot 31 of the enlarged end 11 of the tail of the front column intramedullary nail 1. Nearly 100 clinical applications have shown that the use of the anterior column intramedullary nail for pelvic percutaneous internal fixation disclosed in this utility model, in conjunction with the in vitro guide frame for percutaneous internal fixation of the acetabulum and enhanced intramedullary nail disclosed in the utility model application with application number 202311786273.9, can significantly improve patient symptoms with extremely low complications. Patients can walk aground a few hours after surgery, significantly reducing various medical expenses and shortening hospital stays. Figure 7 shown.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An anterior column intramedullary nail for percutaneous fixation of the pelvis, characterized in that: The front end of the anterior column intramedullary nail (1) is cut to form a cutting surface to form a tip; The anterior column intramedullary nail (1) is arc-shaped so as to pass along the superior pubic branch and part of the ilium; The surface of the anterior column intramedullary nail (1) is smooth to prevent it from penetrating into the joint cavity; A hollow channel (100) is provided inside the anterior column intramedullary nail (1) and the hollow channel (100) penetrates both ends of the anterior column intramedullary nail (1) and is used for inserting a anterior column nail guide needle so that the anterior column intramedullary nail (1) penetrates the superior pubic branch and part of the ilium.

2. The anterior column intramedullary nail for percutaneous fixation of the pelvis according to claim 1, characterized in that: The tail of the anterior column intramedullary nail (1) is designed as an enlarged end (11), and the enlarged end (11) of the tail of the anterior column intramedullary nail (1) is provided with a tail cap (2). The outer wall of the tail cap (2) is provided with a tight thread for firmly fixing it on the cortical bone. The enlarged end (11) of the tail of the anterior column intramedullary nail (1) is connected to the tail cap (2) by a thread.

3. The anterior column intramedullary nail for percutaneous internal fixation of the pelvis according to claim 2, characterized in that: The tail cap (2) comprises a screw portion and a nut portion, the screw portion and the nut portion are fixedly connected, and the outer wall of the nut portion is provided with a tight thread for fixing on the cortical bone; The outer wall of the screw portion is provided with an external thread, the inner wall of the enlarged end (11) at the tail end of the anterior column intramedullary nail (1) is provided with an internal thread, and the screw portion of the tail cap (2) is screwed into the enlarged end (11) at the tail end of the anterior column intramedullary nail (1) to achieve a threaded connection between the two; The end surface of the tail cap (2) at one end away from the screw rod portion is provided with a hexagonal hole for inserting a hexagonal tool to tighten the tail cap (2) and fix the tail cap (2) on the cortical bone.

4. The anterior column intramedullary nail for percutaneous internal fixation of the pelvis according to claim 3, characterized in that: The enlarged end (11) of the tail of the anterior column intramedullary nail (1) is also provided with a ferrule (3). The ferrule (3) is provided with at least two cards (30), and the at least two cards (30) are evenly spaced and circumferentially arranged on the ferrule (3), and the enlarged end (11) of the tail of the anterior column intramedullary nail (1) is provided with at least two card slots (31); The ferrule (3) is used to be sleeved on the butt end of the delivery tool of the anterior column intramedullary nail (1); When the butt end of the delivery tool of the anterior column intramedullary nail (1) is butted against the enlarged end (11) at the tail of the anterior column intramedullary nail (1), the ferrule (3) is slid to the enlarged end (11) at the tail of the anterior column intramedullary nail (1), and the card (30) of the ferrule (3) is just snapped into the card slot (31) of the enlarged end (11) at the tail of the anterior column intramedullary nail (1).

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