CN217660027U

CN217660027U - Locator for inner ankle osteotomy

Info

Publication number: CN217660027U
Application number: CN202221025164.6U
Authority: CN
Inventors: 孙义元; 李棋
Original assignee: West China Hospital of Sichuan University
Current assignee: West China Hospital of Sichuan University
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-28
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to the technical field of medical equipment, a positioner for ankle osteotomy is disclosed, including the locating support, the locating support includes interconnect's first support and second support, form 120 contained angles between first support and the second support, the other end middle part of second support is connected with the cavity sleeve, telescopic axis with form 150 contained angles between the second support. The utility model discloses a locator, simple structure accords with ordinary human physiology anatomical structure, cuts bone direction and fixed the operation of being convenient for of screw implantation angle and bone healing, can avoid repeated drilling or fix, is favorable to bone healing, reduces operation infection probability and doctor-patient radiation exposure risk.

Description

Locator for inner ankle osteotomy

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to locator is used in ankle osteotomy operation.

Background

Medial malleolar osteotomies are a well-established classic approach to the treatment of fractures and lesions of the talar cartilage, but the manner of osteotomy is diverse and includes transverse, oblique, transverse-vertical and oblique-vertical incisions. Oblique osteotomies are a technique commonly used by many surgeons. It has many advantages, including relatively simple technique, good exposure of the talus, retention of the deltoid ligament and optimal screw compression, and is the preferred approach for autologous osteochondral grafts or metal implants to treat medial talar lesions.

Relevant research "Direction of the oblique medial malleolus osseous surgery for exposure of the talus" (Arch ortho ankle osteotomy exposing the oblique cut Direction of the talus) showed that, as shown in fig. 1, an internal ankle osteotomy oriented at an average of 30 ° with respect to the tibial axis perpendicular to the tibial cartilage entering the joint, the osteotomy Direction healing rate was the best, the bone screw locking Direction was perpendicular to the osteotomy Direction, and the fixation strength was the best; marking the osteotomy entrance of the pendulum saw as point A, the osteotomy exit of the pendulum saw as point C, the entry point of the bone screw as point B, the termination point of the bone screw as point D and AC reverse T BD. Clinically, an empirical kirschner wire is generally drilled into the bone cutting line to position the bone cutting line, then a C-arm machine is used for carrying out multiple times of perspective to confirm whether the bone cutting line is suitable or not until the bone cutting line is adjusted to the optimal position so as to meet the requirement of exposing a fracture or a pathological change part, repeated drilling or fixation seriously influences bone healing because of less bone of an inner ankle, and the operation infection probability and the radiation risk of doctors and patients are increased.

SUMMERY OF THE UTILITY MODEL

For solving the deficiencies in the prior art, the utility model provides a locator for the internal ankle osteotomy with accurate location, once only accomplish the location of osteotomy direction and bone screw locking direction.

In order to realize the technical purpose, the utility model discloses a technical scheme is:

the utility model provides an ankle osteotomy operation uses locator, includes locating support, locating support includes interconnect's first support and second support, form 120 contained angles between first support and the second support, the other end middle part of second support is connected with the cavity sleeve, telescopic axis with form 150 contained angles between the second support.

Further, the second support is a telescopic support.

Furthermore, the second support comprises an inner support and an outer support, a hollow slot is formed in the outer support, an insertion block is arranged on the inner support, and the insertion block is connected in the slot in a sliding mode.

Furthermore, a threaded hole perpendicular to the slot is formed in the outer support, and a jacking screw is connected in the threaded hole.

Furthermore, scale mark lines are arranged on the inserting block of the inner support.

Furthermore, the starting point of the scale mark line is the end point far away from one end of the outer bracket.

Furthermore, the scale mark line ranges from 0mm to 10mm, and the precision is 0.1mm.

Further, the minimum length of the second stent is 10mm.

Further, the first support and the second support are of plate-shaped structures.

Compared with the prior art, the beneficial effects of the utility model are that:

the positioner of the utility model has simple structure, conforms to the physiological anatomical structure of the common human body, is convenient for operation and bone healing because of the fixed bone cutting direction and the fixed screw implantation angle, can avoid repeated drilling or fixation, is beneficial to bone healing, and reduces the operation infection probability and the doctor-patient radiation exposure risk; the utility model discloses a locator, the length of second support can accurate regulation and control, can adjust according to patient's the condition, and the commonality is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic representation of a prior art chamfer orientation of an exposed talus bone of an ankle osteotomy;

fig. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an embodiment of the present invention in practical use;

FIG. 4 is another schematic diagram of the embodiment of the present invention

Reference numerals: 1-a first bracket, 2-a second bracket, 3-a sleeve, 21-an inner bracket, 22-an outer bracket, 23-an insert block, 24-a jacking screw and 25-a scale mark line.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

A positioner for an inner ankle osteotomy operation is disclosed, as shown in fig. 2, and comprises a positioning support, wherein the positioning support comprises a first support 1 and a second support 2 which are connected with each other, an included angle of 120 degrees is formed between the first support 1 and the second support 2, a hollow sleeve 3 is connected to the middle part of the other end of the second support 2, and an included angle of 150 degrees is formed between the axis of the sleeve 3 and the second support 2; the sleeve 3 and the first bracket 1 are positioned on the same side of the second bracket 2.

Preferably, various sizing specifications can be made according to different lengths of the second bracket, so that different patients can be conveniently selected. Preferably, the second support 2 is a telescopic support, and the length is adjustable. The second support 2 comprises an inner support 21 and an outer support 22, a hollow slot is arranged in the outer support 22, an insertion block 23 is arranged on the inner support 21, the insertion block 23 is connected in the slot in a sliding mode, a threaded hole is formed in the outer support 22, a jacking screw 24 is connected in the threaded hole, and the insertion block 23 of the inner support 21 is tightly pressed and fixed through screwing the jacking screw 24.

The minimum length of the second bracket 2 is 10mm, namely when the plug is completely arranged in the slot, the length of the second bracket is 10mm; the inserted block 23 of the inner support is provided with a scale mark line 25, the starting point of the scale mark line 25 is the end point far away from one end of the outer support 22, the range of the scale mark line is 0-10 mm, and the precision is 0.1mm. The insert 23 is pulled out, the length of the second bracket 2 can be adjusted, and the length value of the second bracket can be read out at the same time and is fixed by a tightening screw 24 at a proper position.

Preferably, the first bracket 1 and the second bracket 2 have a plate-like structure.

The following describes the use method of the locator specifically, as shown in fig. 3 and 4:

for convenience of description, marking the cutting bone inlet of the pendulum saw as point A, the cutting bone outlet of the pendulum saw as point C, the bone screw entry point as point B, the bone screw termination point as point D, and AC ^ BD; defining a first bracket and a second bracket to form an angle EAB, and forming an angle ABF by the second bracket and a sleeve, wherein the utility model discloses the fixed angle EAB =120 DEG and the angle ABF =150 DEG; since AC ≠ BD, angle EAB =120 °, triangle ABC is an equilateral triangle.

When the device is used, a doctor firstly determines the positions of a C point of an osteotomy outlet of a swing saw and a B point of a bone screw entry point according to an X-ray/CT image of a patient, and measures the distance BC; and adjusting the length of the second support, namely the length of AB, so that AB = BC can determine the position of the point A of the osteotomy entrance of the pendulum saw, wherein EA of the first support is the osteotomy pendulum saw direction, the osteotomy depth AC = AB, and the direction of the sleeve FB is the bone screw insertion direction after the osteotomy operation is completed.

The operation method comprises the following steps: a preoperative doctor can determine the positions of a C point of a bone cutting outlet of a swing saw and a B point of a bone screw entry point according to an X-ray/CT image of a patient, positioning and selection in an operation are facilitated, BC and the upper edge of an ankle joint are in the same horizontal line, the B point is determined, for example, different C points are selected in figures 3 and 4, the distance BC is measured, the distance BC = AB is determined, the length of AB is determined and adjusted, namely the length of a second support is determined, a positioner is placed at the ankle, a bone is cut along the EAC direction, a lesion position is exposed, and after the operation is completed, screws are placed along the FB direction. The width BC of the medial malleolus of an adult is about 15-18 mm, and the length of the second support can be adjusted according to measurement data so as to meet the requirements of different patients and realize the universality of the tool.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims

1. The utility model provides a locator is used in ankle osteotomy operation which characterized in that: including the locating support, the locating support includes interconnect's first support (1) and second support (2), form 120 contained angles between first support (1) and second support (2), the other end middle part of second support (2) is connected with cavity sleeve (3), the axis of sleeve (3) with form 150 contained angles between second support (2).

2. The locator for medial ankle osteotomy of claim 1, wherein: the second support (2) is a telescopic support.

3. The locator for use in medial ankle osteotomy as in claim 2, wherein: the second support (2) comprises an inner support (21) and an outer support (22), a hollow slot is formed in the outer support (22), an insertion block (23) is arranged on the inner support (21), and the insertion block (23) is connected in the slot in a sliding mode.

4. The locator for use in medial ankle osteotomy procedures of claim 3, wherein: the outer bracket (22) is provided with a threaded hole perpendicular to the slot, and the threaded hole is connected with a tightening screw (24).

5. The locator for use in medial ankle osteotomy procedures of claim 3, wherein: and scale marking lines (25) are arranged on the inserting blocks (23) of the inner support.

6. The locator for use in medial ankle osteotomy procedures of claim 5, wherein: the starting point of the scale mark line (25) is an end point far away from one end of the outer bracket (22).

7. The locator for medial ankle osteotomy of claim 5, wherein: the scale mark lines (25) range from 0mm to 10mm, and the precision is 0.1mm.

8. The locator for use in medial ankle osteotomy procedures of claim 7, wherein: the minimum length of the second bracket (2) is 10mm.

9. The locator for use in medial ankle osteotomy procedures of claim 1, wherein: the first support (1) and the second support (2) are of plate-shaped structures.