Feeding tool for anterior column intramedullary nail

Abstract

The utility model relates to a feeding tool for an anterior column intramedullary nail, which belongs to the technical field of orthopedic medical instruments and comprises a hammer rod, a connector and an anterior column intramedullary nail butt joint, one end of the hammer rod is provided with a hammering surface, and one end, far away from the hammering surface, of the hammer rod is in butt joint with the anterior column intramedullary nail butt joint through the connector; wherein a screw cap is arranged on the front column intramedullary nail butt joint, and external threads are arranged on the outer wall of the screw cap; the hammer rod and the screw cap of the butt joint of the anterior column intramedullary nail are located on the same straight line so as to ensure that knocking force borne by the hammering face can be transmitted to the screw cap, then the force is transmitted to the tail end of the anterior column intramedullary nail through the screw cap, and then the anterior column intramedullary nail is fed into the pelvic bone. The utility model provides a feeding tool for an anterior column intramedullary nail, which is used for feeding the anterior column intramedullary nail into a pelvic bone under the matching assistance of an in-vitro guide frame for fixing and reinforcing the intramedullary nail in a percutaneous manner around an acetabulum, can quickly and effectively relieve the symptoms of a pelvic metastatic cancer patient, and enables the patient to recover daily life as soon as possible, so that systematic treatment can be continued.

Description

Technical Field

[0001] The utility model relates to the technical field of orthopedic medical instruments, in particular to a delivery tool for anterior column intramedullary nails. 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. The pelvis is the second most common site of tumor bone metastasis after the spine. 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 utility model application with application number 202311786273.9 discloses an extracorporeal guide frame for percutaneous internal fixation and reinforcement of intramedullary nails around the acetabulum, including a universal guide frame, the universal guide frame including an arc component, the arc component including a left arc guide plate, an intermediate guide plate and a right arc guide plate, the two ends of the intermediate plate are respectively detachably connected to the left arc guide plate and the right arc guide plate, and are spliced ​​into an arc component; a cross-column nail catheter and a front column nail catheter are provided on the left arc guide plate or the right arc guide plate, the intermediate plate is connected to at least one arc rod, and a rear column nail catheter is fixed to the end of the arc rod; three internal fixation reinforcement intramedullary nails that are spatially staggered and arranged in a tripod-like manner are respectively inserted into the pelvic bone around the diseased acetabulum through the cross-column nail catheter, the front column nail catheter and the rear column nail catheter, which can immediately and significantly relieve the patient's pain symptoms and restore motor function. The three internal fixation and reinforcement intramedullary nails are: cross-column nail, posterior column nail and anterior column nail. The cross-column nail refers to: passing through one of the points between the anterior superior iliac spine and the anterior inferior iliac spine of the affected ilium, and taking this as the starting point, passing through the top of the acetabulum, along the cancellous bone of the greater sciatic notch to reach the sacroiliac joint but not passing through the articular surface. The posterior column nail refers to: passing through the ischial tuberosity of the buttocks, and taking the ischial tuberosity of the ischial tuberosity as the starting point, along the inside of the sciatic ramus bone, passing through the posterior wall of the acetabulum, and passing to the proximal end of the greater sciatic notch but not passing through the cortical bone. The anterior column nail refers to: passing through the ilium at the apex of the acetabulum, and taking this as the starting point, passing through the acetabulum top and the anterior wall of the acetabulum, to the pubic superior limb at the apex of the acetabulum, and ending at the pubic symphysis on the affected side but not passing through the cortical bone. Indeed, the invention application "An extracorporeal guide frame for percutaneous internal fixation and enhanced intramedullary nailing around the acetabulum" with application number 202311786273.9 solves the problems of long operation time, high incidence of surgical complications and wound complications, slow patient recovery, etc. in the existing treatment methods for metastatic cancer around the acetabulum due to open surgery, as well as the high technical difficulty, long learning curve, and low tolerance for complications of manual tripod-like internal fixation and enhanced intramedullary nailing surgery. It significantly improves surgical accuracy, reduces surgical technical difficulty, shortens operation time, and thus benefits patients.

[0004] Although 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, it still requires a matching intramedullary nail. Only when the intramedullary nail is used in conjunction with the extracorporeal guide frame can the intramedullary nail be percutaneously inserted into the body and fixed around the acetabulum. However, at present, there is not only no special intramedullary nail for pelvic metastatic cancer on the market that can be used in conjunction with the extracorporeal guide frame, but also no tool for delivering the anterior column intramedullary nail in the special intramedullary nail, which restricts the promotion and application of surgical operations for pelvic bone metastatic cancer. Utility Model Content

[0005] In view of the above problems, the purpose of the utility model is to provide a tool for delivering an anterior column intramedullary nail, which is used to solve the problem that there are not only no special intramedullary nails that can be used with an extracorporeal guide frame on the market, but also no tools for delivering the anterior column intramedullary nail in the special intramedullary nail, which restricts the promotion and application of surgical operations for pelvic bone metastasis cancer.

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

[0007] The utility model discloses a delivery tool for anterior column intramedullary nail, which is used to deliver the anterior column intramedullary nail into the pelvis with the assistance of an external guide frame for percutaneous internal fixation and reinforcement of intramedullary nails around the acetabulum, wherein the inner wall of a hollow channel at the tail end of the anterior column intramedullary nail is provided with an internal thread, and the delivery tool for the anterior column intramedullary nail comprises a hammer rod, a connector and a front column intramedullary nail butt joint, one end of the hammer rod is provided with a hammering surface, and the end of the hammer rod away from the hammering surface is butted with the anterior column intramedullary nail butt joint through the connector ; Wherein, a screw cap is provided on the butt joint of the anterior column intramedullary nail, and the outer wall of the screw cap is provided with an external thread, which is used to be fixedly connected with the tail end of the anterior column intramedullary nail through a thread; the hammering surface is used to withstand knocking; the hammer rod and the screw cap of the butt joint of the anterior column intramedullary nail are located on the same straight line to ensure that the knocking force borne by the hammering surface can be transmitted to the screw cap, and then the screw cap transmits the force to the tail end of the anterior column intramedullary nail, thereby delivering the anterior column intramedullary nail into the pelvis.

[0008] Furthermore, it also includes a handle, and the connector is a three-head connector, on which three plug interfaces are arranged, two of which are located in the same straight line, and the third plug interface is perpendicular to the line connecting the two plug interfaces located in the same straight line; the end of the hammer rod away from the hammering surface and the anterior column intramedullary nail docking joint are respectively docked with the two plug interfaces of the connector located in the same straight line; the handle is arranged on the third plug interface of the connector.

[0009] Furthermore, it also includes a sliding hammer, which is slidably sleeved on the outer side of the hammer rod.

[0010] Preferably, a sliding hammer impact block is provided on the hammer rod between the sliding hammer and the connector, and the sliding hammer impact block is fixedly sleeved on the hammer rod.

[0011] Preferably, the anterior column intramedullary nail is arc-shaped.

[0012] Preferably, the surface of the anterior column intramedullary nail is smooth to prevent it from penetrating into the joint cavity.

[0013] Preferably, the front end of the anterior column intramedullary nail is cut to form a cut surface.

[0014] Preferably, the anterior column intramedullary nail is provided with a tail cap, and a tight thread is provided on the outer wall of the tail cap for firmly fixing it on the cortical bone, and the tail end of the anterior column intramedullary nail is connected to the tail cap by a thread.

[0015] 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 hollow channel at 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 hollow channel at 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.

[0016] Preferably, a ferrule is provided on the butt joint of the front column intramedullary nail, and at least two cards are provided on the ferrule, and at least two cards are evenly spaced and circumferentially arranged on the ferrule, and at least two card slots are provided on the outer wall of the tail end of the front column intramedullary nail; when the front column intramedullary nail butt joint is docked with the tail of the front column intramedullary nail, the screw cap of the front column intramedullary nail butt joint is screwed into the hollow channel of the tail of the front column intramedullary nail, the ferrule is sleeved on the outside of the tail end of the front column intramedullary nail, and the card of the ferrule is just snapped into the card slot of the hollow channel of the tail of the front column intramedullary nail.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model provides a delivery tool for anterior column intramedullary nails, comprising a hammer rod, a connector and a front column intramedullary nail butt joint, wherein a hammer surface is provided at one end of the hammer rod, and an end of the hammer rod away from the hammer surface is butted with the front column intramedullary nail butt joint through the connector; wherein a screw cap is provided on the front column intramedullary nail butt joint, and an outer wall of the screw cap is provided with an outer thread, which is used for being fixedly connected with the tail end of the front column intramedullary nail through a thread; the hammer surface is used for bearing knocking; the hammer rod and the screw cap of the front column intramedullary nail butt joint are located on the same straight line, so as to ensure that the knocking force borne by the hammer surface can be transmitted to the screw cap, and then the screw cap transmits the force to the tail end of the front column intramedullary nail, thereby delivering the front column intramedullary nail into the pelvis. The utility model provides an anterior column intramedullary nail delivery tool, which delivers a special intramedullary nail, namely, an anterior column intramedullary nail, into the pelvis with the assistance of an extracorporeal guide frame for percutaneous internal fixation and reinforcement of the intramedullary nail around the acetabulum, and can quickly and effectively relieve the symptoms of patients with pelvic metastatic cancer, so that the patients can resume their daily lives as soon as possible, thereby continuing to connect with systemic treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a schematic diagram of the anterior column intramedullary nail and the universal intramedullary nail provided in Example 1 of the utility model being placed into the pelvis together as a cross-column nail and a posterior column nail;

[0020] Figure 2 It is a front view of the anterior column intramedullary nail for percutaneous internal fixation of the pelvis provided in Example 2 of the utility model;

[0021] Figure 3 It is a back view of the anterior column intramedullary nail for percutaneous internal fixation of the pelvis provided in Example 2 of the utility model;

[0022] Figure 4 This is a schematic diagram of the use of anterior column intramedullary nail and tail cap for percutaneous pelvic fixation provided by Utility Model Example 2;

[0023] Figure 5 A partial enlarged view of the anterior column intramedullary nail and the tail cap used in conjunction with each other for percutaneous internal fixation of the pelvis provided in Example 2 of the utility model;

[0024] Figure 6 It is a schematic structural diagram of a delivery tool for anterior column intramedullary nail without a slide hammer provided in Example 3 of the utility model;

[0025] Figure 7 It is a schematic structural diagram of an anterior column intramedullary nail delivery tool with a slide hammer provided in Example 3 of the utility model;

[0026] Figure 8 This is a schematic diagram of the structure in which the tail end of the front column intramedullary nail provided by Example 3 of the present utility model is connected to the front column intramedullary nail butt joint through a ferrule;

[0027] Fig. 9 is a top view of the tail end of the anterior column intramedullary nail provided in Example 3 of the utility model;

[0028] Fig.10 It is a schematic diagram of the anterior column intramedullary nail of the pelvic percutaneous internal fixation provided by the utility model embodiment 3 penetrating into the pelvis.

[0029] Description of reference numerals: 1-anterior column intramedullary nail, 10-tail cap;

[0030] 2- hammer rod, 21- hammer surface;

[0031] 3- Connector;

[0032] 4- anterior column intramedullary nail butt joint, 40- screw cap;

[0033] 5-Handle;

[0034] 6-sliding hammer, 61-sliding hammer impact block;

[0035] 7-card holder, 30-card, 31-card slot. DETAILED DESCRIPTION

[0036] 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.

[0037] In order to solve the problem that there is not only no special intramedullary nail that can be used with an extracorporeal guide frame on the market, but also no tool for delivering the front column intramedullary nail in the special intramedullary nail, which restricts the promotion and application of surgical operations for pelvic bone metastasis cancer, the utility model provides a delivery tool for anterior column intramedullary nail, including a hammer rod, a connector and a front column intramedullary nail docking joint, one end of the hammer rod is provided with a hammering surface, and the end of the hammer rod away from the hammering surface is docked with the front column intramedullary nail docking joint through the connector; wherein a screw cap is provided on the front column intramedullary nail docking joint, and the outer wall of the screw cap is provided with an external thread, which is used for being fixedly connected with the tail end of the front column intramedullary nail through a thread; the hammering surface is used for bearing knocking; the hammer rod and the screw cap of the front column intramedullary nail docking joint are located on the same straight line to ensure that the knocking force borne by the hammering surface can be transmitted to the screw cap, and then the screw cap transmits the force to the tail end of the front column intramedullary nail, thereby delivering the front column intramedullary nail into the pelvis. The utility model provides an anterior column intramedullary nail delivery tool, which delivers a special intramedullary nail, namely, an anterior column intramedullary nail, into the pelvis with the assistance of an extracorporeal guide frame for percutaneous internal fixation and reinforcement of the intramedullary nail around the acetabulum, and can quickly and effectively relieve the symptoms of patients with pelvic metastatic cancer, so that the patients can resume their daily lives as soon as possible, thereby continuing to connect with systemic treatment.

[0038] Example 1: An intramedullary nail for percutaneous fixation of the pelvis

[0039] Embodiment 1 of the present invention provides an intramedullary nail for percutaneous fixation of the pelvis, and its structure is described in detail below in conjunction with the accompanying drawings.

[0040] refer to Figure 1 The intramedullary nail for percutaneous internal fixation of the pelvis includes an anterior column intramedullary nail 1 and a universal intramedullary nail, which are used in conjunction with an extracorporeal guide frame for percutaneous internal fixation and reinforcement of the intramedullary nail around the acetabulum. The extracorporeal guide frame for percutaneous internal fixation and reinforcement of the intramedullary nail around the acetabulum includes a cross-column nail guide, an anterior column nail guide and a posterior column nail guide.

[0041] A hollow channel is provided inside the anterior column intramedullary nail 1 for inserting a guide needle for the anterior column nail. The guide needle for the anterior column nail passes through the anterior column nail catheter of the external guide frame of the percutaneous internal fixation reinforcement intramedullary nail around the acetabulum, so that the anterior column intramedullary nail 1 passes through the ilium at the apex of the acetabulum, and from this point, passes through the acetabulum top and the anterior wall of the acetabulum, until it penetrates into the superior pubic branch and part of the ilium at the apex of the acetabulum, and ends at the pubic symphysis on the affected side without penetrating the cortical bone;

[0042] The universal intramedullary nail is provided with a hollow channel inside for inserting a cross-column nail guide needle or a posterior column nail guide needle. The universal intramedullary nail can be used as a cross-column nail and a posterior column nail.

[0043] When the universal intramedullary nail is used as a cross-column nail, the cross-column nail guide wire passes through the cross-column nail catheter of the extracorporeal guide frame of the percutaneous internal fixation and reinforcement intramedullary nail around the acetabulum, so that the cross-column nail passes through one of the points between the anterior superior iliac spine and the anterior inferior iliac spine, and takes this as the starting point, passes through the top of the acetabulum, along the bone of the greater sciatic notch to reach the sacroiliac joint but does not pass through it; when the universal intramedullary nail is used as a posterior column nail, the posterior column nail guide wire passes through the posterior column nail catheter of the extracorporeal guide frame of the percutaneous internal fixation and reinforcement intramedullary nail around the acetabulum, so that the posterior column nail passes through the ischial tuberosity of the buttocks, and takes the ischial tuberosity of the ischial tuberosity as the starting point, along the inside of the sciatic ramus bone, passes through the posterior wall of the acetabulum, and penetrates to the proximal end of the greater sciatic notch but does not penetrate the cortical bone.

[0044] When the universal guide frame is set on the patient, the cross-column nail guide tube, the rear column nail guide tube and the front column nail guide tube are respectively opposite to the anterior superior iliac spine and the anterior inferior iliac spine around the acetabulum on the affected side of the patient's pelvis, the ischial tuberosity of the buttocks and the pubic superior limb direction of the acetabulum vertex;

[0045] The cross-column nail catheter is used to penetrate the cross-column nail guide needle and guide it, so that the cross-column nail passes through one of the points between the anterior superior iliac spine and the anterior inferior iliac spine, and takes this as the starting point, passes through the acetabulum top, along the greater sciatic notch bone to reach the sacroiliac joint but does not pass through it;

[0046] The posterior column nail catheter is used to insert and guide the posterior column nail guide needle, so that the posterior column nail passes through the ischial tuberosity of the buttocks, and takes the ischial tuberosity of the ischial tuberosity as the starting point, along the inside of the sciatic ramus bone, passes through the posterior wall of the acetabulum, and passes to the proximal end of the greater sciatic notch but does not pass through the cortical bone;

[0047] The anterior column nail catheter is used to insert and guide the anterior column nail guide needle, so that the anterior column nail passes through the iliac part of the acetabulum apex, and takes this as the starting point, passes through the acetabulum top and the anterior wall of the acetabulum, to the pubic upper limb, and ends at the pubic symphysis on the affected side but does not penetrate the cortical bone; and the cross-column nail, the posterior column nail and the anterior column nail are staggered in space to form a percutaneous acetabulum tripod to reinforce the area around the acetabulum to be reinforced.

[0048] Among them, the anterior column intramedullary nail 1 is only used to penetrate the superior pubic ramus and part of the ilium;

[0049] Furthermore, the universal intramedullary nail, in addition to being used as a cross-column nail and a posterior column nail, can also be used to penetrate the pelvic bones other than the superior pubic ramus and part of the ilium, including the inferior pubic ramus, ischium, ilium, sacroiliac joint and sacral vertebrae.

[0050] By using the intramedullary nail for percutaneous internal fixation of the pelvis disclosed in the utility model and the extracorporeal guide frame for percutaneous internal fixation of the acetabulum around the acetabulum disclosed in the utility model application with application number 202311786273.9, a percutaneous nailing internal fixation surgery can be performed. The doctor only needs to insert the universal intramedullary nail serving as a cross-column nail and a posterior column nail and the anterior column intramedullary nail 1 along the cross-column nail catheter, the posterior column nail catheter and the anterior column nail catheter in chronological order, thereby significantly shortening the operation time, reducing the incidence of surgical complications, improving the accuracy of the operation and significantly reducing the difficulty of the operation.

[0051] Example 2: Anterior column intramedullary nail for percutaneous fixation of the pelvis

[0052] Embodiment 2 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.

[0053] refer to Figures 2 to 5 A hollow channel is provided inside the anterior column intramedullary nail 1 for inserting a guide needle for the anterior column nail. The guide needle for the anterior column intramedullary nail 1 is used to penetrate only the superior pubic branch and part of the ilium.

[0054] Specifically, the front end of the anterior column intramedullary nail 1 is cut into a cutting surface to form a tip.

[0055] Specifically, the anterior column intramedullary nail 1 is arc-shaped so as to pass along the superior pubic branch and part of the ilium.

[0056] Specifically, the surface of the anterior column intramedullary nail 1 is smooth to prevent it from penetrating into the joint cavity.

[0057] In order to prevent the nail from backing out, the anterior column intramedullary nail 1 is provided with a tail cap 10 , and a tight thread is arranged on the outer wall of the tail cap 10 for firmly fixing it on the cortical bone. The tail end of the anterior column intramedullary nail 1 is connected to the tail cap 10 by thread.

[0058] As a specific implementation method of realizing the threaded connection between the anterior column intramedullary nail 1 and the tail cap 10, the tail cap 10 includes a screw portion and a nut portion, the screw portion and the nut portion are fixedly connected, and a tight thread is provided on the outer wall of the nut portion for fixing on the cortical bone;

[0059] The outer wall of the screw portion is provided with an external thread, and the inner wall of the hollow passage at the tail end of the anterior column intramedullary nail 1 is provided with an internal thread. The screw portion of the tail cap 10 is screwed into the hollow passage at the tail end of the anterior column intramedullary nail 1 to achieve a threaded connection between the two.

[0060] The end surface of the tail cap 10 away from the screw portion is provided with a hexagonal hole for inserting a hexagonal tool to tighten the tail cap 10 and fix the tail cap 10 on the cortical bone.

[0061] In order to ensure that the screw portion of the tail cap 10 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 10 by threads is thicker than the middle and front parts.

[0062] Embodiment 3: A delivery tool for anterior column intramedullary nail

[0063] Embodiment 3 provides an anterior column intramedullary nail delivery tool, which is used to deliver the anterior column intramedullary nail of Embodiment 2 into the patient's body. The structure thereof is described in detail below in conjunction with the accompanying drawings.

[0064] refer to Figure 6 and Figure 7 The delivery tool of the front column intramedullary nail comprises a hammer rod 2, a connector 3 and a front column intramedullary nail joint 4.

[0065] One end of the hammer rod 2 is provided with a hammering surface 21, and the end of the hammer rod 2 away from the hammering surface 21 is butted with the anterior column intramedullary nail butt joint 4 through the connector 3;

[0066] Wherein, a screw cap 40 is provided on the anterior column intramedullary nail joint 4, and an outer wall of the screw cap 40 is provided with an external thread, which is used to be fixedly connected with the tail end of the anterior column intramedullary nail 1 through a thread;

[0067] The hammering surface 21 is used to withstand the hammering;

[0068] The hammer rod 2 and the screw cap 40 of the anterior column intramedullary nail joint 4 are located on the same straight line to ensure that the striking force borne by the hammer surface 21 can be transmitted to the screw cap 40, and then transmitted to the tail end of the anterior column intramedullary nail 1 by the screw cap 40, thereby delivering the anterior column intramedullary nail 1 into the pelvis.

[0069] In order to facilitate the doctor to operate the screw cap 40 of the front column intramedullary nail docking joint 4, the front column intramedullary nail delivery tool also includes a handle 5, and the connector 3 is a three-head connector, on which three plug interfaces are arranged, two of which are located on the same straight line, and the third plug interface is perpendicular to the line connecting the two plug interfaces located on the same straight line; the end of the hammer rod 2 away from the hammering surface 21 and the front column intramedullary nail docking joint 4 are respectively docked with the two plug interfaces of the connector 3 located on the same straight line; the handle 5 is arranged on the third plug interface of the connector 3.

[0070] In order to facilitate fine-tuning of the position of the anterior column intramedullary nail 1 in the pelvis, it is necessary to transmit a small force to the screw cap 40, and then to the tail end of the anterior column intramedullary nail 1, and the delivery tool of the anterior column intramedullary nail also includes a slide hammer 6, and the slide hammer 6 is slidably sleeved on the outside of the hammer rod 2. When the doctor pushes the slide hammer 6 to move on the hammer rod 2 until it hits the connector 3, the thrust is transmitted to the screw cap 40, and the position of the anterior column intramedullary nail 1 in the pelvis can be fine-tuned.

[0071] In order to prevent the sliding hammer 6 from damaging the connector 3 , a sliding hammer impact block 61 is provided on the hammer rod 2 between the sliding hammer 6 and the connector 3 , and the sliding hammer impact block 61 is fixedly sleeved on the hammer rod 2 .

[0072] When the doctor pushes the sliding hammer 6 to move on the hammer rod 2 until it hits the sliding hammer impact block 61, the sliding hammer impact block 61 transmits the force to the hammer rod 2, and the hammer rod 2 transmits the force to the screw cap 40, thereby achieving fine adjustment of the position of the anterior column intramedullary nail 1 in the pelvis.

[0073] In order to enhance the stability of the connection between the anterior column intramedullary nail 1 and its delivery tool, the delivery tool of the anterior column intramedullary nail also includes a clamping sleeve 7. Figure 8 and Fig. 9 At least two cards 70 are arranged on the ferrule 7, and at least two cards 70 are evenly spaced and circumferentially arranged on the ferrule 7. At least two card slots 71 are arranged on the outer wall of the tail end of the front column intramedullary nail 1; the ferrule 7 is sleeved on the front column intramedullary nail docking joint 4, and when the front column intramedullary nail docking joint 4 is docked with the tail of the front column intramedullary nail 1, the screw cap 40 of the front column intramedullary nail docking joint 4 is screwed into the hollow channel of the tail of the front column intramedullary nail 1, and the ferrule 7 is sleeved on the outer side of the tail end of the front column intramedullary nail 1, and the card 70 of the ferrule 7 is just snapped on the card slot 71 of the hollow channel of the tail of the front column intramedullary nail 1.

[0074] The utility model provides a delivery tool for anterior column intramedullary nails. With the assistance of an external guide frame for percutaneous internal fixation of the acetabulum to strengthen the intramedullary nails, a special intramedullary nail, the anterior column intramedullary nail, is delivered into the pelvis. Nearly 100 clinical applications have shown that it can significantly improve the symptoms of patients with pelvic metastatic cancer, with extremely low complications. Patients can walk a few hours after surgery, significantly reducing various medical expenses and shortening hospital stays. Fig.10 shown.

[0075] 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. A delivery tool for anterior column intramedullary nail, used to deliver anterior column intramedullary nail (1) into the pelvis with the assistance of an external guide frame for percutaneous internal fixation of the acetabulum to strengthen the intramedullary nail, wherein the inner wall of the hollow channel at the tail end of the anterior column intramedullary nail (1) is provided with an internal thread, characterized in that: It comprises a hammer rod (2), a connector (3) and an anterior column intramedullary nail butt joint (4). One end of the hammer rod (2) is provided with a hammering surface (21), and the end of the hammer rod (2) away from the hammering surface (21) is butted with the anterior column intramedullary nail butt joint (4) via the connector (3); Wherein, a screw cap (40) is arranged on the anterior column intramedullary nail joint (4), and an outer wall of the screw cap (40) is provided with an external thread for being fixedly connected with the tail end of the anterior column intramedullary nail (1) through a thread; The hammering surface (21) is used to withstand hammering; The hammer rod (2) and the screw cap (40) of the anterior column intramedullary nail joint (4) are located on the same straight line to ensure that the striking force borne by the hammer surface (21) can be transmitted to the screw cap (40), and then the screw cap (40) transmits the force to the tail end of the anterior column intramedullary nail (1), thereby delivering the anterior column intramedullary nail (1) into the pelvis.

2. The delivery tool for anterior column intramedullary nail according to claim 1, characterized in that: Also includes a handle (5), The connector (3) is a three-pin connector, on which three plug interfaces are arranged, two of which are located on the same straight line, and the third plug interface is perpendicular to the line connecting the two plug interfaces located on the same straight line; One end of the hammer rod (2) away from the hammering surface (21) and the anterior column intramedullary nail docking joint (4) are respectively docked with two plugging interfaces of the connector (3) located in the same straight line; The handle (5) is arranged on the third plug-in interface of the connector (3).

3. The delivery tool for anterior column intramedullary nail according to claim 2, characterized in that: Also includes a slide hammer (6), The sliding hammer (6) is slidably sleeved on the outer side of the hammer rod (2).

4. The delivery tool for anterior column intramedullary nail according to claim 3, characterized in that: A sliding hammer impact block (61) is provided on the hammer rod (2) between the sliding hammer (6) and the connector (3), and the sliding hammer impact block (61) is fixedly sleeved on the hammer rod (2).

5. The anterior column intramedullary nail delivery tool according to claim 1, characterized in that: The anterior column intramedullary nail (1) is in an arc shape.

6. The anterior column intramedullary nail delivery tool according to claim 1, characterized in that: The surface of the anterior column intramedullary nail (1) is smooth to prevent it from penetrating into the joint cavity.

7. The anterior column intramedullary nail delivery tool according to claim 1, characterized in that: The front end of the anterior column intramedullary nail (1) is cut to form a cut surface.

8. The anterior column intramedullary nail delivery tool according to claim 1, characterized in that: The anterior column intramedullary nail (1) is provided with a tail cap (10), the outer wall of which is provided with a tight thread for firmly fixing the nail on the cortical bone. The tail end of the anterior column intramedullary nail (1) is connected to the tail cap (10) via a thread.

9. The delivery tool for anterior column intramedullary nail according to claim 8, characterized in that: The tail cap (10) 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 hollow channel 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 (10) is screwed into the hollow channel at the tail end of the anterior column intramedullary nail (1) to achieve a threaded connection between the two; A hexagonal hole is provided on the end surface of the tail cap (10) at one end away from the screw rod portion, and is used to pass a hexagonal tool through the end cap (10) so as to tighten the tail cap (10) and fix the tail cap (10) on the cortical bone.

10. The delivery tool for anterior column intramedullary nail according to claim 9, characterized in that: The anterior column intramedullary nail butt joint (4) is sleeved with a clamping sleeve (7). At least two cards (70) are arranged on the clamping sleeve (7), and the at least two cards (70) are evenly spaced and circumferentially arranged on the clamping sleeve (7), and at least two card slots (71) are arranged on the outer wall of the tail end of the anterior column intramedullary nail (1); When the anterior column intramedullary nail docking joint (4) is docked with the tail of the anterior column intramedullary nail (1), the screw cap (40) of the anterior column intramedullary nail docking joint (4) is screwed into the hollow channel of the tail of the anterior column intramedullary nail (1), the ferrule (7) is sleeved on the outer side of the tail end of the anterior column intramedullary nail (1), and the card (70) of the ferrule (7) is just snapped into the card slot (71) of the hollow channel of the tail of the anterior column intramedullary nail (1).

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