CN112168282A - Marrow cavity focus reducing scraping device - Google Patents

Abstract

The invention discloses a marrow cavity focus reducing scraping device, which comprises a long cylinder body extending into a marrow cavity, wherein the upper end of the long cylinder body is connected with a holding plate positioned outside the marrow cavity, a guide column is arranged above the holding plate, and a guide hole is formed in the guide column; the long cylinder is close to the lower part and is evenly provided with the cursory strip that can bend along the circumference, the bottom of the long cylinder is the arc bottom that outwards extrudes, and this arc bottom sets up to the friction surface. This scraping device stretches into the marrow intracavity and can effectually pass narrow portion, thereby can make the scraping strip crooked through tensile first tensile pole when scraping the focus, enlarged the movable diameter of scraping the strip promptly to can be effectual clear away fast comprehensively to the focus.

Description

Marrow cavity focus reducing scraping device

Technical Field

The invention relates to the field of orthopedics, in particular to a marrow cavity focus reducing scraping device.

Background

Clinically, patients with marrow cavity infection of long bones of limbs are frequently encountered, particularly the infection after the intramedullary needle fixation of fracture of the long bones of the limbs, and the infected sections in the marrow cavity of the patients are longer and even diffuse into the whole marrow cavity. There are currently two treatments for such patients to clear the infectedlesion 1 in the bone marrow cavity, using a fenestrated curettage to clear the lesion. This method requires a long segment window on the backbone, affecting the firmness of the backbone. 2. The focus was removed using a medullary cavity file. Because the thickness of each section of the marrow cavity is different, the difference between the narrow part of the marrow cavity and the enlarged part of the marrow cavity is larger, and the narrow part can not pass through if a rasp is used; the enlarged portion of the medullary cavity cannot be removed with a fine file. Neither of these two methods is effective in removing the intramedullary canal lesions.

Disclosure of Invention

The present invention is directed to solve the above problems and to provide a scraping device for reducing the diameter of a lesion in a bone marrow cavity, which can effectively scrape the lesion in the bone marrow cavity.

The invention realizes the purpose through the following technical scheme:

the marrow cavity focus reducing scraping device comprises a long cylinder body extending into a marrow cavity, wherein the upper end of the long cylinder body is connected with a holding plate positioned outside the marrow cavity, a guide column is arranged above the holding plate, and a guide hole is formed in the guide column;

a plurality of bendable scraping strips are uniformly formed on the lower part of the long cylinder body close to the circumference, the bottom of the long cylinder body is an arc-shaped bottom protruding outwards, and the arc-shaped bottom is arranged as a friction surface;

a first stretching rod and a second stretching rod are arranged in the long cylinder body; the upper part of the first stretching rod passes through the first guide hole and extends to the outside of the guide post, and a limiting tangent plane is formed on the side surface of the first stretching rod and matched with the first guide hole so as to prevent the first stretching rod from rotating during stretching. The upper end of the first stretching rod is connected with a handle, and the lower end of the first stretching rod is fixedly connected with a limiting boss; the second stretching rod is fixedly connected with the bottom of the long cylinder body, the interior of the second stretching rod is of a hollow structure, a second guide hole is formed in the upper end of the second stretching rod, the second guide hole is communicated with the hollow structure, and the lower end of the second guide hole is formed into a positioning step; the first stretching rod penetrates through the second guide hole to extend into the hollow structure, a spring is arranged between the limiting boss and the positioning step, the spring is provided with an initial elastic value, when the limiting boss slides to the lowest end of the hollow structure, the initial position is achieved, and the spring is in a compressed state.

When the focus scraping device is used, the initial state of the scraping strip is close to the stretching state, the scraping strip and the long cylinder body penetrate through a marrow cavity to reach the position of a focus, at the moment, the first stretching rod is stretched, the spring between the limiting boss and the positioning step further exerts force on the second stretching rod, and the second stretching rod stretches upwards slowly, so that the scraping strip is stressed, the scraping strips begin to bend slowly to form an oval shape, namely, the diameter range of the scraped focus is expanded, and the focus can be effectively scraped.

As an important technical scheme, a plurality of water spraying holes are formed in the second stretching rod close to the lower part, and the water spraying holes correspond to the gaps between two adjacent scraping strips when the scraping strips are compressed and expanded; a water inlet channel is formed in the first stretching rod and penetrates through the upper end and the lower end of the first stretching rod, and the upper end of the water inlet channel is connected with a water pipe through a connector.

Furthermore, the length of the scraping strip is 3cm-5cm, the width of the scraping strip is 2mm-3mm, and a plurality of friction strips are arranged on the surface of the scraping strip.

Furthermore, the friction surface of the arc-shaped bottom is a net-shaped friction surface formed by a plurality of friction marks.

Furthermore, one side of the guide post is also provided with a locking screw, and when the first stretching rod is stretched to a certain length, the locking screw can be rotated to be matched with the limiting tangent plane to fix the first stretching rod at a certain position.

Further, the length of the second telescopic rod is larger than that of the scraping strip.

Furthermore, the left side and the right side of the inner side surface of the scraping strip are provided with inclined cutting planes, and the left side and the right side of the scraping strip form bent sharp edges when the scraping strip is bent.

Has the advantages that: this scraping device stretches into the marrow intracavity and can effectually pass narrow portion, thereby can make the scraping strip crooked through tensile first tensile pole when scraping the focus, enlarged the movable diameter of scraping the strip promptly to can be effectual clear away fast comprehensively to the focus.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the present invention in use;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an isometric view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is a bottom view of FIG. 1;

FIG. 6 is a front view of the initial state of the present invention;

fig. 7 is a structural view of the wiper strip of the present invention.

The reference numerals are explained below:

1. a long cylinder; 2. a first stretching rod; 2a water inlet channel; 2b, a limiting boss; 2c, limiting the tangent plane; 3. a second stretch rod; 3a, positioning steps; 3b, a second guide hole; 3c, water spraying holes; 4. holding the plate; 5. a guide post; 5a, a first guide hole; 6. a handle; 7. a spring; 8. scraping the strips; 8a, a chamfer surface; 9. an arc-shaped bottom; 9b, a friction surface; 10. and locking the screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a marrow cavity lesion reducing scraping device, which comprises along cylinder 1 extending into a marrow cavity, wherein the upper end of thelong cylinder 1 is connected with a holding plate 4 located outside the marrow cavity, aguide post 5 is arranged above the holding plate 4, and afirst guide hole 5a is arranged inside theguide post 5. Thelong cylinder body 1 is close to the lower portion, a plurality offlexible scraping strips 8 are evenly formed along the circumference, and the initial state of thescraping strips 8 is slightly bent outwards. Preferably, the length of thescraping strip 8 is 3cm-5cm, the width is 2mm-3mm, the surface of thescraping strip 8 is further provided with a plurality of friction strips, the left side and the right side of the inner side surface of thescraping strip 8 are provided withchamfer planes 8a, and the left side and the right side of thescraping strip 8 form bent sharp edges when thescraping strip 8 is bent (as shown in fig. 7). Thescraping strip 8 and thelong cylinder body 1 can be formed at one time, and can also be fixedly connected with thelong cylinder body 1 in a welding mode, when the scraping device stretches into the focus position, the drivingscraping strip 8 is bent to effectively and comprehensively scrape the focus, moreover, theoblique section 8a of the inner side surface of thescraping strip 8 can form a sharp edge in a bent state, and an operator can rotate the scraping device to more effectively and quickly scrape the focus completely.

The bottom of thelong cylinder body 1 is an arc-shaped bottom 9 protruding outwards, and the arc-shaped bottom 9 is arranged as a friction surface 9 b; the friction surface 9b is a reticular friction surface 9b formed by a plurality of friction marks, a focus can be diffused at any part of the marrow cavity or the bottom of the marrow cavity, the focus at the bottom is difficult to scrape clean by adopting a file or a spatula at present, and the reticular friction surface 9b is arranged at the bottom (as shown in figure 5), so that the focus at the bottom of the marrow cavity can be effectively scraped.

Afirst stretching rod 2 and asecond stretching rod 3 are arranged in thelong cylinder body 1, and thefirst stretching rod 2 and thesecond stretching rod 3 are coaxial; the upper part of thefirst stretching rod 2 passes through afirst guide hole 5a and extends to the outside of aguide post 5, a limitingtangent plane 2c is formed on the side surface of thefirst stretching rod 2, the limitingtangent plane 2c is matched with thefirst guide hole 5a, the upper end of thefirst stretching rod 2 is connected with a handle 6, and the lower end of thefirst stretching rod 2 is fixedly connected with alimiting boss 2 b; thesecond stretching rod 3 is fixedly connected with the bottom of thelong cylinder body 1, the inside of the second stretching rod is of a hollow structure, asecond guide hole 3b is formed in the upper end of thesecond stretching rod 3, thesecond guide hole 3b is communicated with the hollow structure, the lower end of the second guide hole is formed into apositioning step 3a, and further, the length of the second telescopic rod is larger than that of thescraping strip 8. Thefirst stretching rod 2 penetrates through thesecond guide hole 3b and extends into the hollow structure, thefirst stretching rod 2 is in sliding fit with thesecond guide hole 3b, a spring 7 is arranged between thelimiting boss 2b and thepositioning step 3a, the spring 7 is provided with an initial elastic value, when thelimiting boss 2b slides to the lowest end of the hollow structure, the initial position is achieved, and the spring 7 is in a compressed state.

In the initial state of the focus scraping device, thescraping strip 8 is nearly in an extended state (slightly bent outward), thelimit boss 2b of thefirst stretching rod 2 is positioned at the bottom of the hollow structure of thesecond stretching rod 3, and at this time, the spring 7 is in a compressed state. And because spring 7 is the compression state, thespacing boss 2b offirst tensile pole 2 is located the bottom of the hollow structure ofsecond tensile pole 3, and thescraping strip 8 presents the slightly crooked state and can not straighten by virtue of self elasticity, and this structure can makescraping strip 8 outwards crooked easily when the scraping device uses.

Specifically, thescraping strip 8 and thelong cylinder 1 together pass through the marrow cavity to the focus position, at this time, thefirst stretching rod 2 is slowly stretched upwards, the spring 7 between thelimiting boss 2b and the positioningstep 3a further forms acting force on thesecond stretching rod 3, thesecond stretching rod 3 is slowly stretched upwards relatively, so that thescraping strip 8 is stressed, as the force applied by the spring 7 to thesecond stretching rod 3 is increased, thescraping strips 8 begin to bend greatly and slowly form an oval shape, namely the diameter range of the scraped focus is enlarged, when thescraping strip 8 contacts the inner wall of the marrow cavity, namely thescraping strip 8 reaches the maximum bending range at this time, the scraping strip can react on thesecond stretching rod 3, because of the existence of the spring 7, thescraping strip 8 has a buffering function, no harm is caused to the inner wall of the marrow cavity, and then the operating doctor tries to rotate thelong cylinder 1, when thescraping strip 8 is sensed to scrape the inner focus, thelocking screw 10 is adopted to lock the first stretching rod at a fixed position, and then thelong cylinder body 1 is continuously rotated to scrape the focus. In the scraping process, because thefirst stretching rod 2 is locked, thescraping strip 8 still has a small buffer when contacting with the focus, thereby avoiding unnecessary damage to the inner wall of the marrow cavity.

In the initial state, a certain distance is provided between twoadjacent scrapers 8, and the diameter of the cylinder formed by the plurality ofscrapers 8 is substantially the same as the diameter of thelong cylinder 1, so that the narrow portion of the medullary cavity can be more easily passed.

As a preferred embodiment of the present invention, a plurality of water spraying holes 3c are provided near the lower portion of thesecond stretching rod 3, each water spraying hole 3c is provided with an atomizing nozzle, and the water spraying holes 3c correspond to the gap between twoadjacent scrapers 8 when thescrapers 8 are compressed and expanded; awater inlet channel 2a is formed in thefirst stretching rod 2, thewater inlet channel 2a penetrates through the upper end and the lower end of thefirst stretching rod 2, and the upper end of thewater inlet channel 2a is connected with a water pipe through a joint. Throughinhalant canal 2a and water piping connection, can strike off the focus and wash by water to the focus position when scraping off the focus, scrape off cleaner. When flushing, the hollow structure of the secondtelescopic rod 3 is filled with water.

Further, a lockingscrew 10 is further disposed on one side of theguide post 5, and when thefirst stretching rod 2 is stretched to a certain length, the lockingscrew 10 is rotated to be capable of being matched with the limitingtangent plane 2c, so that thefirst stretching rod 2 is fixed at a certain position.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (7)

1. Marrow cavity focus reducing scraping device, its characterized in that: the bone marrow taking device comprises a long cylinder body extending into a bone marrow cavity, wherein the upper end of the long cylinder body is connected with a holding plate positioned outside the bone marrow cavity, a guide post is arranged above the holding plate, and a guide hole is formed in the guide post;

a plurality of bendable scraping strips are uniformly formed on the lower part of the long cylinder body close to the circumference, the bottom of the long cylinder body is an arc-shaped bottom protruding outwards, and the arc-shaped bottom is arranged as a friction surface;

a first stretching rod and a second stretching rod are arranged in the long cylinder body; the upper part of the first stretching rod penetrates through the first guide hole and extends to the outside of the guide post, a limiting tangent plane is formed on the side surface of the first stretching rod and matched with the first guide hole, the upper end of the first stretching rod is connected with a handle, and the lower end of the first stretching rod is fixedly connected with a limiting boss; the second stretching rod is fixedly connected with the bottom of the long cylinder body, the interior of the second stretching rod is of a hollow structure, a second guide hole is formed in the upper end of the second stretching rod, the second guide hole is communicated with the hollow structure, and the lower end of the second guide hole is formed into a positioning step; the first stretching rod penetrates through the second guide hole to extend into the hollow structure, a spring is arranged between the limiting boss and the positioning step, the spring is provided with an initial elastic value, when the limiting boss slides to the lowest end of the hollow structure, the initial position is achieved, and the spring is in a compressed state.

2. The intramedullary canal lesion reducing scraping device of claim 1, wherein: a plurality of water spraying holes are formed in the second stretching rod close to the lower part, and correspond to the gap between every two adjacent scraping strips when the scraping strips are compressed and expanded; a water inlet channel is formed in the first stretching rod and penetrates through the upper end and the lower end of the first stretching rod, and the upper end of the water inlet channel is connected with a water pipe through a connector.

3. The intramedullary canal lesion reducing scraping device of claim 1, wherein: the length of the scraping strip is 3cm-5cm, the width of the scraping strip is 2mm-3mm, and a plurality of friction strips are arranged on the surface of the scraping strip.

4. The intramedullary canal lesion reducing scraping device of claim 1, wherein: the friction surface of the arc-shaped bottom is a net-shaped friction surface formed by a plurality of friction marks.

5. The intramedullary canal lesion reducing scraping device of any one of claims 1 to 4, wherein: and when the first stretching rod is stretched to a certain length, the locking screw can be rotated to be matched with the limiting tangent plane to fix the first stretching rod at a certain position.

6. The intramedullary canal lesion reducing scraping device of claim 1, wherein: the length of the second telescopic rod is greater than that of the scraping strip.

7. The intramedullary canal lesion reducing scraping device of claim 6, wherein: the left side and the right side of the inner side surface of the scraping strip are formed with inclined cutting planes, and the left side and the right side of the scraping strip form bent sharp edges when the scraping strip is bent.

Images