CN218500756U

CN218500756U - Heel-to-heel axial distractor

Info

Publication number: CN218500756U
Application number: CN202221983729.1U
Authority: CN
Inventors: 廖雄
Original assignee: Changsha central hospital
Current assignee: Changsha central hospital
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-02-21
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a heel is from axial struts ware, including traction needle and two sets of subassemblies that strut, arbitrary subassembly that struts includes fixed vaulting pole, the connecting rod, slip vaulting pole and twist grip, the one end of fixed vaulting pole is provided with the fixed vaulting pole hole that can cup joint traction needle, the one end rigid coupling of the other end and connecting rod, the one end of slip vaulting pole is provided with the slip vaulting pole hole that can cup joint traction needle, the other end is provided with the sliding connection hole with the connecting rod sliding connection, one side rigid coupling of slip vaulting pole is equipped with the threaded sleeve who establishes the screw hole in, twist grip is connected with the screw hole in order can leaning on the mode and the screw hole that lean on the connecting rod other end. The utility model discloses a twist grip, threaded rod will rotate forward in the threaded sleeve and impel, when the front end of threaded rod supported the connecting rod, utilized effort and reaction force principle, will pull the slip vaulting pole and keep away from fixed vaulting pole, reach the purpose of strutting. The fracture end is strongly propped open by mechanical force, and the effect and efficiency of the minimally invasive calcaneal fracture surgery can be obviously improved.

Description

Heel-to-heel axial distractor

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an auxiliary reduction apparatus of calcaneum fracture closed minimal access surgery for carry out the axial closure to the calcaneum and strut, with resume rapidly calcaneum length, height and correct the enstrophe deformity and continuously maintain this kind of state of resetting, restore to the throne fixedly and create key prerequisite for follow-up further percutaneous wicresoft.

Background

Calcaneus fracture is mostly caused by high-energy violence such as traffic accidents or high-fall injuries, deformity such as calcaneus shortening, widening, height loss and inversion often occurs after fracture, and meanwhile, the injury of soft tissues around affected feet is also serious, and the operation treatment is often needed.

The traditional incision reduction internal fixation operation method is adopted for treatment, the incision complication is high, the operation wound is large, the blood loss in the operation is large, and the postoperative recovery is slow. Therefore, such procedures have gradually become alternatives. In order to avoid complications of open surgery, orthopedists began exploring minimally invasive surgical protocols. The percutaneous prying reduction screw internal fixation is used as a pure closed minimally invasive surgery technology for treating calcaneus fracture, has the advantages of small surgical trauma, low soft tissue complications, quick recovery of patients and the like, and is widely developed at home and abroad in recent years. The operation method firstly solves the problem that the fracture broken end is retracted, and then the fracture block which is displaced from the lower articular surface after reduction is pried. While the conventional method is to pass a schanz pin across the tuberosity behind the calcaneus and pull the broken ends of the calcaneus apart by manual traction, the retraction force is very limited and difficult to maintain. Therefore, it is very difficult, if not impossible, to achieve closure and distraction of the fractured ends of the calcaneus without good instrument assistance.

The existing calcaneus distractor widely used in clinical practice has few types, and a plurality of hospitals use the cervical vertebra distractor for replacement. Can not be propped open along the axis of the calcaneus, has small propping force and can not achieve good propping effect for most parts, thereby influencing the resetting quality and the operation effect.

Chinese patent CN2020216517216 discloses a heel axial distractor, which comprises a wrench, a traction needle and two sets of distraction components, wherein any one of the distraction components comprises a traction screw, a nut, a first support rod and a second support rod, the mechanical action of screwing the hexagon nut by the wrench pushes the distal support rod to move to the distal end, and meanwhile, the proximal support rod is given the same reaction force to realize distraction. The fracture end of the calcaneus fracture is expanded by mechanical force, but the following problems can be caused:

1. the traction screw is designed into a cylindrical full thread, the second support rod is connected with the second support rod through a matched circular sleeve, and the rotation of the distractor cannot be controlled by the design, so that the distractor is difficult to maintain to be distracted according to the long axis of the calcaneus, and the best distraction effect is realized;

2. the operation is inconvenient, the screwing of the nut cannot be continuous, the wrench needs to be withdrawn and matched after rotating a certain angle, and the adjustment efficiency is low;

3. the traction screw, the first support rod, the second support rod and other parts are too thick, so that perspective shielding can occur, the perspective effect is influenced, and the intraoperative judgment is further influenced; when the hexagonal nut is screwed by a wrench, particularly when the hexagonal nut is expanded to a certain degree, the wrench can obviously drive the expanding component to swing, so that the stability of the expander cannot be maintained;

4. after the second bracing piece later stage received great traction force, the screw-thread fit probably has the jamming, and it can be more difficult to rotate the nut application of force.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heel is from axial struts ware to solve above-mentioned problem.

In order to realize the above-mentioned purpose, the utility model discloses a novel heel distance axial struts ware, including two traction needles and two sets of subassemblies that strut, arbitrary the subassembly that struts includes fixed vaulting pole, connecting rod, slip vaulting pole and twist grip, the one end of fixed vaulting pole is provided with can cup joint the fixed vaulting pole hole of traction needle, the other end with the one end rigid coupling of connecting rod, the one end of slip vaulting pole is provided with can cup joint the slip vaulting pole hole of traction needle, the other end be provided with the sliding connection hole of connecting rod sliding connection, one side rigid coupling of slip vaulting pole is equipped with the thread bush of establishing the screw hole in, twist grip can support and lean on to arrive the mode of the connecting rod other end with the screw hole is connected.

Furthermore, the traction needle is a common Kirschner wire which is always prepared in an operating room, and the diameter of the Kirschner wire is 2-4mm.

Furthermore, the fixed stay bar and the connecting rod are integrally bent and formed through a straight rod, and the included angle between the fixed stay bar and the connecting rod is 80-100 degrees.

Furthermore, the telescopic sliding support rod further comprises an extension rod and a connecting block, one end of the extension rod is fixedly connected to the sliding support rod in a perpendicular mode, the other end of the extension rod is fixedly connected with the connecting block, and the threaded sleeve is fixedly connected to the connecting block.

Further, the axes of the fixed stay bar hole and the sliding stay bar hole are arranged in parallel.

Further, the twist grip is T type handle, T type handle still include with the dwang of threaded rod perpendicular connection.

Furthermore, the end part of the threaded rod is provided with a limiting counter bore which can be sleeved outside the other end of the connecting rod.

Furthermore, the bottom of the fixed stay bar is fixedly connected with a fixed stay bar lengthening sleeve, the fixed stay bar hole is formed in the fixed stay bar lengthening sleeve, the bottom of the sliding stay bar is fixedly connected with a sliding stay bar lengthening sleeve, and the sliding stay bar hole is formed in the sliding stay bar lengthening sleeve.

Compared with the prior art, the utility model has the advantages of:

1. the utility model discloses a rotatory turning handle to mechanical force promotes the threaded rod and preceeds forward in the threaded sleeve, after the front end of threaded rod supported the connecting rod, because effort and reaction force principle, the threaded rod will pull the slip vaulting pole and keep away from fixed vaulting pole, realizes powerful the strutting.

2. The utility model discloses a two draw the needle to place respectively at calcaneum broken line both ends, and lie in on the calcaneum major axis (near-end draws the needle percutaneous and crosses talus center, and the distal end draws the needle percutaneous and crosses behind the calcaneum tuberosity center), and the major axis that struts according to the calcaneum promptly struts. Thus, when in reduction, the auxiliary reduction function of the soft tissue hinge at the fracture end can be exerted to the maximum.

3. The utility model discloses the mode that struts is the closure, at the in-process that struts, because the effect of fracture end soft tissue hinge (fracture end soft tissue can be with the help of the supplementary tractive fracture end self return of tension when strutting), can resume rapidly the general form of calcaneum, length, width and height promptly.

4. The utility model discloses an axial struts, resumes rapidly behind the calcaneus form, still can continuously maintain this kind of reset state. The method creates a key premise for the subsequent minimally invasive surgery treatment of the joint surface for percutaneous prying reduction calcaneal displacement and percutaneous screw fixation.

5. The utility model discloses only need rotatory twist grip, can realize strutting, can strut the subassembly to inboard and the outside respectively and carry out strutting of different dynamics according to the needs that reset. Is simple and convenient, and can obviously improve the operation efficiency.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a first axial schematic view of a calcaneus distractor according to the preferred embodiment of the present invention;

fig. 2 is a second axial view of the calcaneus distractor disclosed in the preferred embodiment of the present invention;

fig. 3 is a schematic front view of the calcaneus distractor disclosed in the preferred embodiment of the present invention;

FIG. 4 is a schematic top view of the calcaneus distractor disclosed in accordance with a preferred embodiment of the present invention;

fig. 5 is a schematic perspective view of an insertion point of a retractor needle according to a preferred embodiment of the present invention;

FIG. 6 is a schematic axial calcaneus view in plan view illustrating the insertion direction of the traction needle according to the preferred embodiment of the present invention;

FIG. 7 is a schematic view of the heel bone distractor according to the preferred embodiment of the present invention;

fig. 8 is a schematic view of the heel bone axial plane after the heel bone spreader is spread and reset according to the preferred embodiment of the present invention.

Illustration of the drawings:

1. a traction needle; 2. a distraction assembly; 21. fixing the stay bar; 211. fixing a stay bar hole; 22. a connecting rod; 23. a sliding stay bar; 231. a sliding brace rod hole; 232. a sliding connection hole; 24. rotating the handle; 241. rotating the rod; 242. a threaded rod; 243. limiting counter bores; 25. a threaded sleeve; 251. a threaded hole; 26. an extension rod; 27. connecting blocks; 28. a fixed stay bar lengthening sleeve; 29. the sliding support rod is provided with a lengthening sleeve.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1-4, the embodiment of the utility model discloses a calcaneum struts ware, including drawing needle 1 and two sets of subassembly 2 that strut, arbitrary subassembly 2 that strut includes fixed vaulting pole 21, connecting rod 22, slip vaulting pole 23 and twist grip 24, the quantity that draws needle 1 is two, all adopts the diameter that the operating room is equipped with always to be 3 mm's ordinary ke shi needle, and its intensity and rigidity homoenergetic resist the strength of pulling out, non-deformable well. One end of the fixed stay bar 21 is provided with a fixed stay bar hole 211 which can be sleeved with the traction needle 1, the other end of the fixed stay bar is fixedly connected with one end of the connecting rod 22, specifically, the fixed stay bar 21 and the connecting rod 22 are bent into an L shape through a straight rod in an integrated mode, and the fixed stay bar 21 and the connecting rod 22 are vertically arranged at an angle of 90 degrees. One end of the sliding stay 23 is provided with a sliding stay hole 231 which can be sleeved with the traction needle 1, the other end is provided with a sliding connection hole 232 which is in sliding connection with the connecting rod 22, one side of the sliding stay 23 is fixedly connected with a threaded sleeve 25 which is internally provided with a threaded hole 251, and the rotating handle 24 is connected with the threaded hole 251 in a mode of being abutted against the other end of the connecting rod 22.

In this embodiment, in order to realize the fixed mounting of threaded sleeve 25, still include extension rod 26 and connecting block 27, the perpendicular rigid coupling of one end of extension rod 26 is on sliding support 23, and the other end and connecting block 27 rigid coupling, threaded sleeve 25 rigid coupling is on connecting block 27.

In this embodiment, the axes of the fixed stay hole 211 and the sliding stay hole 231 are arranged in parallel, the connecting rod 22 and the threaded rod 242 are arranged coaxially, and meanwhile, the connecting rod 22, the threaded rod 242 and the extension rod 26 are arranged in parallel, so that parallel traction is facilitated.

In this embodiment, the rotating handle 24 is a T-shaped handle, the T-shaped handle includes a rotating rod 241 and a threaded rod 242 which are connected by vertical welding, the threaded rod 242 is connected with the threaded hole 251, and the rotating rod 241 can apply a rotating force more conveniently. Furthermore, in order to prevent the threaded rod 242 from slipping when applying force to the connecting rod 22, the end of the threaded rod 242 is provided with a limiting counterbore 243 which can be sleeved outside the other end of the connecting rod 22, and when the connecting rod rotates, the other end of the connecting rod 22 is always limited in the limiting counterbore 243, so that coaxial driving is ensured.

In this embodiment, when the distractor is inserted into the two ends of the traction needle 1, in order to shorten the working length of the traction needle 1 outside the bone as much as possible and further reduce the deformation of the traction needle 1, the fixed stay lengthening sleeve 28 is fixedly connected to the bottom of the fixed stay 21, and the fixed stay hole 211 is disposed in the fixed stay lengthening sleeve 28, so that the fixed stay lengthening sleeve 28 can be tightly attached to the bone. The bottom of the sliding support rod 23 is fixedly connected with a sliding support rod lengthening sleeve 29, and the sliding support rod hole 231 is arranged in the sliding support rod lengthening sleeve 29, so that the sliding support rod lengthening sleeve 29 can be tightly attached to the bone.

In particular use, and with reference to figures 5-8, the forward extension of the tangent to the upper posterior edge of the normal calcaneus generally passes through the talus neck with the long axis of the calcaneus parallel thereto, i.e., the line connecting the center point of the talus and the center point of the tuberosity behind the calcaneus.

1. The central point of the talar head and the central point of the tuberosity of the posterior calcaneus on the lateral plate were visualized using a 2ml syringe needle as a marker to determine the lateral percutaneous insertion point of the introducer needle 1. Wherein the talus lateral traction needle 1 is arranged in the direction vertical to the sagittal plane of the affected foot; the insertion direction of the calcaneal side traction needle 1 is combined with the calcaneal axial position perspective image and is placed in the direction perpendicular to the longitudinal axis of the calcaneal axial position image. This ensures that the pins are positioned perpendicular to the calcaneus axis and thus distracted along the long axis of the calcaneus (see fig. 5 and 6).

2. Small incisions of 4mm are made at the positions where the traction needles 1 go in and out of the skin in sequence, local skin soft tissues are properly separated, an inner group of distraction components and an outer group of distraction components 2 of the distracter are installed according to the drawing, the fixed stay bar 21 and the sliding stay bar 23 are respectively sleeved into the parts of the two traction needles 1 exposed out of the skin, and the fixed stay bar lengthening sleeve 28 and the sliding stay bar lengthening sleeve 29 are both attached to the calcaneus bone surface. Then, by rotating the T-shaped handle, the threaded rod 242 is pushed forward in the threaded sleeve 25, and when the front end of the threaded rod 242 abuts against the connecting rod 22, the sliding stay 23 is pulled away from the fixed stay 21 by using the principle of acting force and reaction force, so as to achieve the purpose of distraction. Because the mode of strutting is along calcaneum long axis closed distraction, at the in-process that struts, owing to the effect of fracture end soft tissue hinge (fracture end soft tissue can assist tractive fracture piece and fracture broken ends self return with the help of the tension when strutting), can resume the general form of calcaneum rapidly, length, width and height promptly, resume simultaneously that the fracture end of calcaneum is original space, and sustainable maintenance this kind of reset state. The method creates key preconditions for the subsequent minimally invasive surgery treatment of percutaneous prying reduction of the articular surface of calcaneal displacement and percutaneous screw fixation (see fig. 7 and 8).

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The heel axial distractor is characterized by comprising a traction needle (1) and two groups of distraction components (2), wherein any one of the distraction components (2) comprises a fixed stay bar (21), a connecting rod (22), a sliding stay bar (23) and a rotating handle (24), one end of the fixed stay bar (21) is provided with a fixed stay bar hole (211) capable of being sleeved with the traction needle (1), the other end of the fixed stay bar is fixedly connected with one end of the connecting rod (22), one end of the sliding stay bar (23) is provided with a sliding stay bar hole (231) capable of being sleeved with the traction needle (1), the other end of the sliding stay bar is provided with a sliding connection hole (232) in sliding connection with the connecting rod (22), one side of the sliding stay bar (23) is fixedly connected with a threaded sleeve (25) internally provided with a threaded hole (251), and the threaded rod (242) of the rotating handle (24) is connected with the threaded hole (251) in a manner of being capable of abutting against the other end of the connecting rod (22).

2. The calcar axial distractor according to claim 1, characterized in that the traction needle (1) is a common kirschner wire, which is always available in the operating room, and the kirschner wire has a diameter of 2-4mm.

3. The calcar axial spacer according to claim 1, characterized in that the fixed stay (21) and the connecting rod (22) are integrally formed by bending a straight rod, and the included angle between the fixed stay (21) and the connecting rod (22) is 80-100 °.

4. The calcar axial spacer according to claim 1, further comprising an extension rod (26) and a connecting block (27), wherein one end of the extension rod (26) is vertically fixed on the sliding support rod (23), the other end is fixed on the connecting block (27), and the threaded sleeve (25) is fixed on the connecting block (27).

5. The calcaneal axial distractor of claim 1, wherein the axes of the fixed strut bore (211) and the sliding strut bore (231) are disposed in parallel.

6. The calcar axial spacer according to any of claims 1 to 5, characterized in that said rotating handle (24) is a T-handle, said T-handle further comprising a rotating rod (241) perpendicularly connected to said threaded rod (242).

7. The calcaneal axial spacer as recited in claim 6, characterized in that the end of the threaded rod (242) is provided with a limiting counterbore (243) that can be sleeved outside the other end of the connecting rod (22).

8. The calcar axial spacer according to any one of claims 1 to 5, characterized in that a fixed spacer lengthening sleeve (28) is fixed to the bottom of the fixed spacer (21), the fixed spacer hole (211) is provided in the fixed spacer lengthening sleeve (28), a sliding spacer lengthening sleeve (29) is fixed to the bottom of the sliding spacer (23), and the sliding spacer hole (231) is provided in the sliding spacer lengthening sleeve (29).