CN213310239U

CN213310239U - Extensible parallel screw guider for single-side external fixing frame

Info

Publication number: CN213310239U
Application number: CN202022033285.2U
Authority: CN
Inventors: 杨征
Original assignee: Beijing Jishuitan Hospital
Current assignee: Beijing Jishuitan Hospital
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-06-01
Anticipated expiration: 2030-09-16

Abstract

The utility model relates to an extensible parallel screw guider for a unilateral external fixation frame, which comprises a handle, wherein two slide rails are symmetrically arranged on the two sides of the first end of the handle, and the second end of the handle is a free end with adjustable length and is used for being held by medical staff; the number of the sliding blocks is two, the two sliding blocks are respectively matched with the two sliding rails, sliding block screws are arranged at the first ends of the two sliding blocks and used for fixedly connecting the sliding blocks with the sliding rails, threaded guide holes are uniformly distributed in the two sliding blocks, and internal threads are arranged in the threaded guide holes; the screw thread guide sleeve is of a hollow tubular structure, the first end of the screw thread guide sleeve is provided with an external screw thread, and the external screw thread is matched with the internal screw thread of the screw thread guide hole; the sleeve core is of a needle-shaped structure and is matched with the thread guide sleeve. The utility model discloses the device is simple, can help the doctor to realize putting the nail parallel fast, improves operation efficiency.

Description

Extensible parallel screw guider for single-side external fixing frame

Technical Field

The utility model relates to a can prolong parallel screw director for unilateral external fixation frame belongs to medical instrument technical field.

Background

The tibia fracture is the most common fracture of lower limb bones, the fracture is divided into upper, middle and lower fractures due to the action of external force, the fracture is most common at the position 1/3 below the middle part of the tibia, the muscle is less under the shank because the muscle skin wraps the bone, the fracture is particularly easy to occur at the position where the bone faces the bone, and the tibia fracture is particularly easy to occur due to the force of rotation or direct violence. The fracture line can be horizontal, oblique, spiral or comminuted fracture; the fracture of the branch is often found in children.

The fracture can be divided into tibial plateau fracture and tibial shaft fracture according to fracture parts, and the tibial plateau fracture refers to fracture of the proximal tibia and the articular surface for supporting femoral condyles. This damage is very severe and can lead to joint dysfunction if not treated properly. This fracture often occurs in violent injuries in young men and mild injuries in older osteoporotic women. When the tibial plateau is fractured, symptoms such as knee pain, swelling and inability to bear weight of the lower limb occur. Limited active and passive knee joint movement, localized tenderness of the proximal tibia and knee joint, tension in the musculoskeletal compartment of the calf and associated loss of sensation in the foot.

Tibial shaft fractures are the most common long tubular fractures, and tibial fractures can be divided into proximal, distal and middle fractures, with the degree of fracture injury depending on the degree of crus violence. Tibial shaft fractures include fatigue fractures, stable non-displaced fractures caused by mild violence, and soft tissue defects, nervous system disorders, vascular insufficiency, and bone defects caused by extreme violence, all of which may lead to amputation. The anterior and medial sides of the tibia cling to the skin, and are characterized by open fracture, serious trauma, large wound area, comminuted fracture, serious pollution and tissue contusion.

At present, the serious fracture needs surgical intervention treatment, a single-side fixing frame is arranged at the fracture part, the screws which are arranged in the process of arranging the single-side fixing frame are required to be absolutely parallel, and otherwise, the installation is difficult or the fracture end is displaced. To achieve parallelism of the implanted screws, it is often necessary to adjust the direction of the implanted screws multiple times under fluoroscopy, increasing the time of the patient's surgery, surgical trauma and radiation exposure. At present, a guide device capable of assisting in placing screws is clinically lacked, so that the distance between the screws can be adjusted, and each screw pair can be ensured to be parallel.

SUMMERY OF THE UTILITY MODEL

To the above outstanding problem, the utility model provides a can prolong parallel screw director for unilateral external fixation frame, the device need not many times the direction that the screw was put into in many times of perspective adjustment, greatly reduces patient's trauma probability and radiation exposure's time.

In order to achieve the purpose, the utility model adopts the following technical proposal:

an extendable parallel screw guide for a unilateral external fixation frame, comprising the following components:

the medical nursing handle comprises a handle, wherein two sliding rails are symmetrically arranged on two sides of a first end of the handle, and a second end of the handle is a free end with adjustable length and is used for being held by medical staff;

the number of the sliding blocks is two, the two sliding blocks are respectively matched with the two sliding rails, sliding block screws are arranged at the first ends of the two sliding blocks and used for fixedly connecting the sliding blocks with the sliding rails, threaded guide holes are uniformly distributed in the two sliding blocks, and internal threads are arranged in the threaded guide holes;

the screw thread guide sleeve is of a hollow tubular structure, the first end of the screw thread guide sleeve is provided with an external screw thread, and the external screw thread is matched with the internal screw thread of the screw thread guide hole;

the sleeve core is of a needle-shaped structure and is matched with the thread guide sleeve.

The extendable parallel screw guide, preferably, the slider screw is located on a side adjacent to the first end of the handle.

The extensible parallel screw guide is preferably arranged such that the length of the slide rail is 1.5 to 3 times the length of the slide block.

The distance between two adjacent thread guide holes of the extensible parallel screw guide is preferably 1.0-3.0 cm.

The extendable parallel screw guide preferably has a screw guide hole with a diameter of 0.5-1.0 cm.

Preferably, the length of the thread guide sleeve is 3.0-10.0cm, and the inner hole diameter is 0.25-0.5 cm.

The extendable parallel screw guide preferably has an extendable length of 5.0-10.0 cm.

The utility model discloses owing to take above technical scheme, it has following advantage:

1. the utility model designs the parallel screw guider composed of the slide rail and the slide block, which can assist doctors to insert parallel screws into the bone of a patient once and in parallel according to the screw setting distance set before the operation when the operation is performed on the tibia of a fracture patient, thereby avoiding the problem that the screws are set for many times in the traditional operation through multiple perspectives to ensure that each pair of screws are parallel, and greatly reducing the trauma probability of the patient and the radiation exposure time;

2. the utility model discloses the device is simple, can help the doctor to realize putting the nail parallel fast, improves operation efficiency.

Drawings

FIG. 1 is a schematic view of the structure of the handle of the device of the present invention;

FIG. 2 is a schematic structural view of a slider in the device of the present invention;

FIG. 3(a) is a schematic sectional view taken along the direction B-B in FIG. 2, and FIG. 3(B) is a schematic sectional view taken along the direction A-A in FIG. 2;

fig. 4(a) is a schematic structural view of a thread guide sleeve in the device of the present invention, and fig. 4(b) is a schematic structural view of a sleeve core in the device of the present invention;

FIG. 5 is a schematic view of the overall structure of the device of the present invention after the slide rail is matched with the slide block;

the respective symbols in the figure are as follows:

1-a handle; 2-a slide rail; 3-sliding block, 301-sliding block screw, 302-thread guide hole; 4-a threaded guide sleeve; 5-sleeve core.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by the ordinary person in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "first end", "second end", etc. are used to define the components, and are only used for the convenience of distinguishing the components, and if not stated otherwise, the terms do not have special meanings, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 5, the utility model provides a can prolong parallel screw director for unilateral external fixation frame, including following part:

the medical nursing handle comprises a handle 1, wherein two sliding rails 2 are symmetrically arranged on two sides of a first end of the handle 1, and a second end of the handle 1 is a free end with adjustable length and used for being held by medical staff; as shown in fig. 1;

the number of the sliding blocks 3 is two, the two sliding blocks 3 are respectively matched with the two sliding rails 2, sliding block screws 301 are arranged at the first ends of the two sliding blocks 3 and are used for fixedly connecting the sliding blocks 3 with the sliding rails 2, threaded guide holes 302 are uniformly distributed in the two sliding blocks 3, and internal threads are arranged in the threaded guide holes 302; as shown in fig. 2 and 3;

the thread guide sleeve 4 is of a hollow tubular structure, and a first end of the thread guide sleeve 4 is provided with an external thread which is matched with the internal thread of the thread guide hole 302; as shown in fig. 4;

and the sleeve core 5 is of a needle-shaped structure, and the sleeve core 5 is matched with the threaded guide sleeve 4, as shown in fig. 4.

In this embodiment, the slider screw 301 is preferably located on a side near the first end of the handle 1.

In this embodiment, the length of the slide rail 2 is preferably 2 times the length of the slider 3.

In this embodiment, the distance between two adjacent screw guide holes 302 is preferably 1.5 cm.

In this embodiment, the diameter of the threaded guide hole 302 is preferably 0.8 cm.

In this embodiment, the length of the screw guide sleeve 4 is preferably 6cm, and the inner diameter is preferably 0.3 cm.

In this embodiment, the extendable length of the handle 1 is preferably 9 cm.

The utility model discloses the operation method of device as follows:

1. before an operation, determining the distance between screws preset in the bone of a patient, and sliding the sliding block 3 to a preset position;

2. the slide block screw 301 is screwed down to fix the slide block 3 and the slide rail 2;

3. screwing the thread guide sleeve 4 into the thread guide hole 302 selected in the step 1;

4. inserting the sleeve core 5 into the threaded guide sleeve 4 in the step 3;

5. cutting skin and separating to bone surface, placing the screw thread guide sleeve 4 and the sleeve core 5 into the cut to abut against the bone surface;

6. the sleeve core 5 is pulled out, and screws for operation are driven into the sleeve along the thread guide sleeve 4 to complete the operation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An extendable parallel screw guide for a single-sided external fixator, comprising:

the medical nursing handle comprises a handle (1), wherein two sliding rails (2) are symmetrically arranged on two sides of a first end of the handle (1), and a second end of the handle (1) is a free end with adjustable length and is used for being held by medical staff;

the number of the sliding blocks (3) is two, the two sliding blocks (3) are respectively matched with the two sliding rails (2), sliding block screws (301) are arranged at first ends of the two sliding blocks (3) and are used for fixedly connecting the sliding blocks (3) with the sliding rails (2), thread guide holes (302) are uniformly distributed in the two sliding blocks (3), and internal threads are arranged in the thread guide holes (302);

the thread guide sleeve (4) is of a hollow tubular structure, and a first end of the thread guide sleeve (4) is provided with an external thread which is matched with the internal thread of the thread guide hole (302);

the sleeve core (5) is of a needle-shaped structure, and the sleeve core (5) is matched with the thread guide sleeve (4).

2. The extendable parallel screw guide of claim 1, wherein said slider screw (301) is located on a side near the first end of said handle (1).

3. The extendable parallel screw guide of claim 1, wherein the length of said sliding rail (2) is 1.5-3 times the length of said sliding block (3).

4. The extendable parallel screw guide of claim 1, wherein the pitch between two adjacent threaded guide holes (302) is 1.0-3.0 cm.

5. The extendable parallel screw guide of claim 1, wherein the threaded guide hole (302) has a bore diameter of 0.5-1.0 cm.

6. The extendable parallel screw guide of claim 1, wherein the threaded guide sleeve (4) has a length of 3.0-10.0cm and an inner bore diameter of 0.25-0.5 cm.

7. The extendable parallel screw guide of claim 1, wherein the extendable length of the handle (1) is 5.0-10.0 cm.