Distraction device capable of expanding column body

Abstract

The spreader comprises a tube body composed of an inner sleeve and an outer sleeve, at least four first notches are formed in the outer side of the tube body of the inner sleeve, at least eight second notches are formed in the outer side of the tube body of the outer sleeve, the outer sleeve is connected with the inner sleeve in a sleeved and screwed mode, and a spreading mechanism is arranged at one end of the outer sleeve. Compared with a traditional spine nail or titanium cage distraction mode, the balloon distraction technology has the advantages that the balloon distraction technology has remarkable advantages, operation of the balloon distraction technology is relatively simple and convenient, operation time is short, pain of a patient is relieved, the balloon distraction technology can accurately distraction a compressed vertebral body, the height of the vertebral body is recovered, and the balloon distraction technology is suitable for being popularized and applied. Deviation possibly occurring in a traditional method is avoided, the stability of the vertebral body can be enhanced through injection of the bone cement, and re-compression is effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a spreader with an expandable column. Background Art

[0002] In the field of modern medicine, for vertebral compression fractures caused by osteoporosis, this method combines vertebral dilation balloon catheters and vertebroplasty auxiliary devices, bringing significant therapeutic effects to patients.

[0003] Osteoporosis is a common bone disease, which is mainly manifested by thinning and weakening of bones and easy fracture. Vertebral compression fracture is one of the common complications of osteoporosis, which often occurs in the vertebral part of the spine. This fracture will cause the vertebral height to decrease, which will cause symptoms such as pain and spinal deformity, seriously affecting the patient's quality of life; during the operation, the doctor needs to use a vertebral expansion balloon catheter and vertebroplasty auxiliary equipment. The doctor will insert the balloon into the diseased vertebra through the catheter, and then gradually expand the balloon to expand the compressed vertebra and restore its height. This step can not only effectively relieve the patient's pain, but also help to form a bone cement perfusion cavity. After the balloon is expanded and withdrawn, the doctor will inject bone cement into the perfusion cavity; after the balloon has completed the expansion of the compressed vertebra and restored its height, it needs to be withdrawn first, and then the bone cement filling system of the vertebroplasty instrument enters to complete the bone cement injection. Although the above method is more convenient than the traditional spinal nail or titanium cage expansion method, the operation time is shortened, but the operation is still complicated, and compared with the expandable column expander developed this time, there is an additional balloon withdrawal step. Utility Model Content

[0004] The purpose of the utility model is to provide a spreader with an expandable column to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an expandable column expander, comprising a tube body composed of an inner sleeve and an outer sleeve, the outer side of the inner sleeve body is provided with at least four first slots, the outer side of the outer sleeve body is provided with at least eight second slots, the outer sleeve is screwed and connected to the inner sleeve, and an expansion mechanism is provided at one end of the outer sleeve.

[0006] Further optimized, at least eight protrusions are symmetrically provided on the outer circumferential side of one end of the inner sleeve close to the expansion mechanism.

[0007] For further optimization, the eight protrusions are matched and correspondingly engaged with the eight second notches arranged on the outside of the outer sleeve body.

[0008] For further optimization, a threaded portion is provided at one end of the inner sleeve, and the threaded portion is threadedly connected to an inner hole at one end of the outer sleeve.

[0009] In a further optimization, the expansion mechanism is threadedly connected to the tail end of the inner sleeve.

[0010] For further optimization, the inner wall of the spreading mechanism is symmetrically provided with a plurality of sliding connections with the eight second notches.

[0011] Beneficial Effects

[0012] The expandable column expander provided by the utility model has significant advantages over the traditional spinal nail or titanium cage expansion method, and the balloon expansion technology has the advantages of being relatively simple to operate, short in operation time, and reducing the pain of the patient. The balloon expansion technology can accurately expand the compressed vertebrae and restore their height, avoiding the deviations that may occur in traditional methods. The injection of bone cement can enhance the stability of the vertebrae and effectively prevent re-compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the overall structure expansion effect structure of the utility model. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] Example

[0017] like Figure 1-2 As shown, an expandable cylindrical expander includes a tube body consisting of an inner sleeve 1 and an outer sleeve 2. The outer side of the inner sleeve 1 is provided with at least four first slots 7, and the outer side of the outer sleeve 2 is provided with at least eight second slots 4. The outer sleeve 2 is sleeved and screwed with the inner sleeve 1, and an expansion mechanism 6 is provided at one end of the outer sleeve 2.

[0018] In this embodiment, at least eight protrusions 5 are symmetrically provided on the outer circumferential side of one end of the inner sleeve 1 close to the spreading mechanism 6. After the protrusions 5 are inserted into the outer sleeve 2, they can be easily rotated into the eight second slots 4 of the outer sleeve 2, effectively preventing the inner sleeve 1 from detaching from the outer sleeve 2.

[0019] The eight protrusions are matched and correspondingly engaged with the eight second notches 4 arranged on the outer side of the outer sleeve 2 .

[0020] One end of the inner sleeve 1 is provided with a threaded portion, and the threaded portion is threadedly connected to the inner hole of one end of the outer sleeve 2.

[0021] The expansion mechanism 6 is threadedly connected to the rear end of the inner sleeve 1 .

[0022] The inner wall of the spreading mechanism 6 is symmetrically provided with a plurality of slots slidably connected to the eight second slots 4 .

[0023] The outer sleeve is provided with eight slots, while the inner sleeve is designed with four slots. This layout is intended to optimize the injection and diffusion process of bone cement. Eight bumps are arranged on the outer cylindrical surface of the inner sleeve. After being inserted into the outer sleeve, these bumps can be easily rotated into the eight slots of the outer sleeve, effectively preventing the inner sleeve from detaching from the outer sleeve. The front part of the inner sleeve and the front part of the inner hole of the outer sleeve are threadedly connected, further enhancing the stability between the two.

[0024] During use, the fixing effect is achieved through the threaded connection between the expansion mechanism and the tail of the inner sleeve; the expansion mechanism is used to push the outer sleeve forward so that the slotted connecting sections of the outer sleeve are expanded outward, thereby achieving the desired expansion purpose, and bone cement is injected to complete the entire operation process.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A spreader with an expandable column, characterized in that: The invention comprises a tube body consisting of an inner sleeve (1) and an outer sleeve (2), wherein the outer side of the inner sleeve (1) is provided with at least four first notches (7), and the outer side of the outer sleeve (2) is provided with at least eight second notches (4). The outer sleeve (2) is sleeved and screwed to the inner sleeve (1), and one end of the outer sleeve (2) is provided with a spreading mechanism (6).

2. The expandable cylindrical spreader according to claim 1, characterized in that: At least eight protrusions (5) are symmetrically arranged on the outer circumferential side of one end of the inner sleeve (1) close to the spreading mechanism (6).

3. The expandable cylindrical spreader according to claim 2, characterized in that: The eight protrusions (5) are matched and correspondingly engaged with the eight second notches (4) arranged on the outside of the outer sleeve (2).

4. The expandable cylindrical spreader according to claim 1, characterized in that: One end of the inner sleeve (1) is provided with a threaded portion, and the threaded portion is threadedly connected to the inner hole of one end of the outer sleeve (2).

5. The expandable cylindrical spreader according to claim 1, characterized in that: The spreading mechanism (6) is threadedly connected to the rear end of the inner sleeve (1).

6. The expandable cylindrical spreader according to claim 1, characterized in that: The inner wall of the spreading mechanism (6) is symmetrically provided with a plurality of slots slidably connected to the eight second slots (4).

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