Telescopic elastic intramedullary needle extraction device

Abstract

The utility model relates to the field of orthopedic minimally invasive surgical instruments, in particular to a telescopic elastic intramedullary needle taking-out device which comprises a trephine sleeve, an outer thread is arranged on the top of the surface of the trephine sleeve, and the top end of the trephine sleeve is in threaded connection with a handle through the outer thread. The taking-out mechanism used for taking out the intramedullary needle is installed on the surface of the trephine sleeve in a penetrating mode; when the intramedullary nail is fixed, a medical worker hooks one end of the intramedullary nail into the threaded fixing block through a shifting hook and extends the end of the intramedullary nail out of an inner cavity of the trephine sleeve through a containing groove and a through hole, meanwhile, the medical worker screws a threaded plug into the inner cavity of the threaded fixing block through a tool, the intramedullary nail is pressed, and the intramedullary nail is fixed. And the limiting rod is inserted into the inner cavity of the trephine sleeve to limit the threaded plug, so that the purposes that the fixing strength of the intramedullary nail can be enhanced, movement of the threaded plug is limited through limiting of the limiting rod, and the fixing stability is improved are achieved.

Description

Technical Field

[0001] The utility model relates to the field of orthopedic minimally invasive surgical instruments, in particular to a telescopic elastic intramedullary needle removal device. Background Art

[0002] Bone fractures are a common type of fracture in children. Elastic intramedullary nails have the characteristics of low iatrogenic trauma, convenient surgical operation, satisfactory fracture reduction, firm fixation, rapid fracture healing, and short hospitalization time. Therefore, this technology has become the preferred method for pediatric orthopedic surgeons to treat long bone fractures in children. The traditional method of removing the needle after fracture healing is to use flat-head pliers to pull out the elastic intramedullary nail. There are the following difficulties during the operation: (1) According to the width of the flat-head pliers, the surgical incision often needs to be extended on the basis of the original incision, which enlarges the postoperative surgical scar and even causes subcutaneous fat liquefaction under the irritation of the flat-head pliers, inducing incision infection and increasing iatrogenic trauma in children; (2) The flat-head pliers have thicker pliers heads. When the exposed tail end of the elastic intramedullary nail is short or embedded in bone, it is often impossible to clamp the tail end of the intramedullary nail directly. Needle-nosed pliers are needed to pull the intramedullary nail out of the bone for a distance before it can be used. This is time-consuming and labor-intensive, increases the number of removal steps, and prolongs the operation time;

[0003] After searching, the elastic intramedullary nail closed extractor with the authorization announcement number of CN219089611U is found. Although the device has the advantages of simple structure, convenient clinical operation, simple surgical procedure, and can remove the elastic intramedullary nail through a small incision, the device fixes the intramedullary nail by squeezing the screw and the first thread. Since the material of the intramedullary nail is hard and difficult to squeeze, the screw is easily dislocated when the intramedullary nail is knocked out, causing the intramedullary nail to fall off.

[0004] Therefore, a telescopic elastic intramedullary nail removal device is proposed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a telescopic elastic intramedullary nail removal device in order to solve the above problems, which improves the problem that the intramedullary nail is hard and difficult to squeeze, and the screw is easily dislocated when the intramedullary nail is knocked out, causing the intramedullary nail to fall off.

[0006] The utility model achieves the above-mentioned purpose through the following technical scheme: a telescopic elastic intramedullary needle removal device, comprising: a trephine sleeve, the top of the surface of the trephine sleeve is provided with an external thread, and the top of the trephine sleeve is threadedly connected to a handle through the external thread; a removal mechanism, the removal mechanism for removing the intramedullary needle is installed through the surface of the trephine sleeve; wherein the removal mechanism comprises a fixing component and a removal component, the fixing component for fixing the intramedullary needle is installed through the bottom of the surface of the trephine sleeve, and the removal component for hammering and removing the intramedullary needle is installed on the surface of the trephine sleeve.

[0007] Preferably, the fixing assembly includes a threaded fixing block fixedly installed at the bottom of the inner cavity of the trepanation sleeve, a placement groove is provided on one side of the threaded fixing block, a through hole is provided on the surface of the trepanation sleeve and located on one side of the placement groove, the inner cavity of the threaded fixing block is threadedly connected with a threaded plug, and a hexagonal groove is provided on the top of the threaded plug.

[0008] Preferably, a mounting cylinder is fixedly installed on the bottom of one side of the circumferential drill sleeve, a piston plate is slidably installed in the inner cavity of the mounting cylinder, a limiting rod is fixedly installed on one side of the piston plate, one end of the limiting rod passes through the circumferential drill sleeve and extends to the top of the threaded plug, and a pull rod is fixedly installed on the other side of the piston plate, one end of the pull rod passes through the mounting cylinder and extends to the outside of the mounting cylinder, and a return spring is sleeved on the surface of the pull rod.

[0009] Preferably, the removal assembly includes a sliding hammer slidably mounted on the surface of the ring drill sleeve, a fixed plate is fixedly mounted on the bottom of the ring drill sleeve surface, a sliding plate is slidably mounted on the surface of the ring drill sleeve and located on the top of the fixed plate, and an elastic member is installed between the sliding plate and the fixed plate.

[0010] Preferably, guide rails are fixedly installed on both sides of the surface of the trepanation sleeve, and sliding grooves are opened on both sides of the inner side wall of the slide hammer, and the guide rails are slidably connected to the sliding grooves.

[0011] Preferably, anti-collision pads are fixedly mounted on both sides of the bottom of the handle, and the material of the anti-collision pads is a rubber component.

[0012] Preferably, the number of the elastic members is four, and the four elastic members are equidistantly installed between the fixed plate and the sliding plate.

[0013] The beneficial effects of the utility model are:

[0014] 1. When fixing the intramedullary nail, the medical staff hooks one end of the intramedullary nail into the interior of the threaded fixing block through the hook, and extends one end of the intramedullary nail out of the inner cavity of the trephine sleeve through the placement groove and the through hole. At the same time, the medical staff screws the threaded plug into the inner cavity of the threaded fixing block through the tool to compress the intramedullary nail, and inserts the limit rod into the inner cavity of the trephine sleeve to limit the threaded plug, which can strengthen the fixing strength of the intramedullary nail, and limit the movement of the threaded plug through the limit rod to increase the fixing stability;

[0015] 2. When removing the intramedullary nail, the handle is connected to the trephine sleeve. At the same time, the medical staff holds the sliding hammer and moves it upward to hammer the handle. While the sliding hammer moves up and down on the surface of the trephine sleeve, the elastic part and the slide plate limit the sliding hammer and increase the hammering force, which makes it easier for medical staff to remove the intramedullary nail and changes the traditional method of removing it with clamps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the fixing assembly of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the threaded fixing block of the utility model;

[0019] Figure 4 for Figure 3 Enlarged view of area A in the middle;

[0020] Figure 5 It is a schematic diagram of the structure of the removal component of the utility model.

[0021] In the figure: 1. trephine sleeve; 2. external thread; 3. handle; 4. removal mechanism; 41. fixing assembly; 411. threaded fixing block; 412. placement groove; 413. threaded plug; 414. hexagonal groove; 415. mounting cylinder; 416. piston plate; 417. limit rod; 418. pull rod; 419. return spring; 42. removal assembly; 421. slide hammer; 422. fixing plate; 423. slide plate; 424. elastic member; 425. guide rail. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] When implementing: Figure 1-5As shown, a telescopic elastic intramedullary needle removal device comprises: a trephine sleeve 1, the top of the surface of the trephine sleeve 1 is provided with an external thread 2, and the top of the trephine sleeve 1 is threadedly connected with a handle 3 through the external thread 2; a removal mechanism 4, the removal mechanism 4 for removing the intramedullary needle is installed through the surface of the trephine sleeve 1; wherein the removal mechanism 4 comprises a fixing component 41 and a removal component 42, the fixing component 41 for fixing the intramedullary needle is installed through the bottom of the surface of the trephine sleeve 1, and the removal component 42 for hammering and removing the intramedullary needle is installed on the surface of the trephine sleeve 1; anti-collision pads are fixedly installed on both sides of the bottom of the handle 3, and the material of the anti-collision pads is rubber components.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the fixing assembly 41 includes a threaded fixing block 411 fixedly installed at the bottom of the inner cavity of the trephine sleeve 1, a placement groove 412 is provided on one side of the threaded fixing block 411, a through hole is provided on the surface of the trephine sleeve 1 and located on one side of the placement groove 412, the inner cavity of the threaded fixing block 411 is threadedly connected with a threaded plug 413, and the top of the threaded plug 413 is provided with a hexagonal groove 414; a mounting cylinder 415 is fixedly installed at the bottom of one side of the trephine sleeve 1, a piston plate 416 is slidably installed in the inner cavity of the mounting cylinder 415, and a limiting rod 417 is fixedly installed on one side of the piston plate 416, and one end of the limiting rod 417 passes through the trephine sleeve 1 and extends to the threaded plug At the top of 413, a pull rod 418 is fixedly installed on the other side of the piston plate 416, one end of the pull rod 418 passes through the installation tube 415 and extends to the outside of the installation tube 415, and a reset spring 419 is sleeved on the surface of the pull rod 418. The medical staff hooks one end of the intramedullary nail into the interior of the threaded fixing block 411 through the pull hook, and extends one end of the intramedullary nail out of the inner cavity of the trepanation sleeve 1 through the placement groove 412 and the through hole. At the same time, the medical staff screws the threaded plug 413 into the inner cavity of the threaded fixing block 411 through a tool to tighten the intramedullary nail, and inserts the limit rod 417 into the inner cavity of the trepanation sleeve 1 to limit the threaded plug 413.

[0025] like Figure 1 and Figure 2As shown, the removal component 42 includes a sliding hammer 421 slidably mounted on the surface of the trephine sleeve 1, a fixing plate 422 is fixedly mounted on the bottom of the surface of the trephine sleeve 1, a slide plate 423 is slidably mounted on the surface of the trephine sleeve 1 and located on the top of the fixing plate 422, and an elastic member 424 is installed between the slide plate 423 and the fixing plate 422 to connect the handle 3 with the trephine sleeve 1. At the same time, the medical staff holds the sliding hammer 421 and moves upward to hammer the handle 3, and while the sliding hammer 421 moves up and down on the surface of the trephine sleeve 1, the elastic member 424 and the slide plate 423 increase the hammering force while limiting the sliding hammer 421; guide rails 425 are fixedly mounted on both sides of the surface of the trephine sleeve 1, and sliding grooves are opened on both sides of the inner wall of the sliding hammer 421, and the guide rails 425 are slidably connected with the sliding grooves; the number of elastic members 424 is four, and the four elastic members 424 are equidistantly installed between the fixing plate 422 and the slide plate 423.

[0026] When the utility model fixes the intramedullary nail, the medical staff hooks one end of the intramedullary nail into the interior of the threaded fixing block 411 through the pull hook, and extends one end of the intramedullary nail out of the inner cavity of the trepanation sleeve 1 through the placement groove 412 and the through hole. At the same time, the medical staff screws the threaded plug 413 into the inner cavity of the threaded fixing block 411 through a tool to compress the intramedullary nail, and inserts the threaded plug 413 into the inner cavity of the trepanation sleeve 1 through the limiting rod 417 to limit the threaded plug 413. When the intramedullary nail is taken out, the handle 3 is connected to the trepanation sleeve 1. At the same time, the medical staff holds the sliding hammer 421 and moves it upward to hammer the handle 3. When the sliding hammer 421 moves up and down on the surface of the trepanation sleeve 1, the elastic member 424 and the slide plate 423 can increase the hammering force while limiting the sliding hammer 421.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A telescopic elastic intramedullary nail removal device, characterized in that: include: A trephine sleeve (1), wherein the top of the surface of the trephine sleeve (1) is provided with an external thread (2), and the top of the trephine sleeve (1) is threadedly connected to a handle (3) via the external thread (2); A removal mechanism (4), used for removing the intramedullary needle, the removal mechanism (4) being installed through the surface of the trephine sleeve (1); The removal mechanism (4) comprises a fixing component (41) and a removal component (42), wherein the fixing component (41) for fixing the intramedullary needle is installed through the bottom of the surface of the trephine sleeve (1), and the removal component (42) for hammering and removing the intramedullary needle is installed on the surface of the trephine sleeve (1).

2. A telescopic elastic intramedullary nail removal device according to claim 1, characterized in that: The fixing assembly (41) comprises a threaded fixing block (411) fixedly mounted on the bottom of the inner cavity of the trephine sleeve (1); a placement groove (412) is provided on one side of the threaded fixing block (411); a through hole is provided on the surface of the trephine sleeve (1) and located on one side of the placement groove (412); a threaded plug (413) is threadedly connected to the inner cavity of the threaded fixing block (411); and a hexagonal groove (414) is provided on the top of the threaded plug (413).

3. A telescopic elastic intramedullary nail removal device according to claim 2, characterized in that: A mounting cylinder (415) is fixedly mounted on the bottom of one side of the trepanation sleeve (1), a piston plate (416) is slidably mounted in the inner cavity of the mounting cylinder (415), a limiting rod (417) is fixedly mounted on one side of the piston plate (416), one end of the limiting rod (417) passes through the trepanation sleeve (1) and extends to the top of the threaded plug (413), a pull rod (418) is fixedly mounted on the other side of the piston plate (416), one end of the pull rod (418) passes through the mounting cylinder (415) and extends to the outside of the mounting cylinder (415), and a return spring (419) is sleeved on the surface of the pull rod (418).

4. The telescopic elastic intramedullary nail removal device according to claim 1, characterized in that: The removal assembly (42) comprises a sliding hammer (421) slidably mounted on the surface of the trephine sleeve (1); a fixing plate (422) is fixedly mounted on the bottom of the surface of the trephine sleeve (1); a sliding plate (423) is slidably mounted on the surface of the trephine sleeve (1) and located on the top of the fixing plate (422); and an elastic member (424) is mounted between the sliding plate (423) and the fixing plate (422).

5. A telescopic elastic intramedullary nail removal device according to claim 4, characterized in that: Guide rails (425) are fixedly mounted on both sides of the surface of the trephine sleeve (1), and sliding grooves are provided on both sides of the inner side wall of the slide hammer (421), and the guide rails (425) are slidably connected to the sliding grooves.

6. The telescopic elastic intramedullary nail removal device according to claim 1, characterized in that: Anti-collision pads are fixedly mounted on both sides of the bottom of the handle (3), and the material of the anti-collision pads is a rubber component.

7. The telescopic elastic intramedullary nail removal device according to claim 4, characterized in that: The number of the elastic members (424) is four, and the four elastic members (424) are installed at equal distances between the fixing plate (422) and the sliding plate (423).

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