Molding and measuring device for medicine-carrying bone cement wrapped intramedullary needle

Abstract

A shaping and measuring device for a medicine-carrying bone cement wrapped intramedullary needle comprises a body, the body is rectangular, an open hole is formed in the body, the open hole is a through hole, and a size mark is marked near the open hole in the body; the size marks are arranged on at least one surface of the body; a blade ring is arranged on one face of the body and surrounds the open hole, a center hole is formed in the center of the blade ring, the diameter of the center hole is the same as that of the open hole, and the center hole and the open hole are aligned and communicated with each other.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical auxiliary tools, in particular to a shaping and measuring device for an intramedullary needle wrapped with drug-loaded bone cement. Background Art

[0002] In the treatment of bone infection and osteomyelitis, in addition to intravenous antibiotics, local use of antibiotics is a very effective means. Bone cement is currently commonly used as an antibiotic carrier. Drug-loaded bone cement is often shaped into a "bead chain" shape and placed at the site of infection. However, for intramedullary infection, bone cement is not easy to shape and insert directly, and it is often necessary to wrap around the intramedullary needle and then insert it into the medullary cavity to achieve a local effective drug concentration. The length of the intramedullary needle is about 17-40cm.

[0003] The general operation of the surgery is to expand the medullary cavity after the proximal opening. The diameter of the intramedullary needle wrapped with drug-loaded bone cement is determined according to the maximum diameter of the expanded medullary cavity. The bone cement and antibiotics are fully mixed and evenly applied to the outside of the intramedullary needle, and the outer diameter is made 10-15mm smaller than the maximum diameter of the expanded medullary cavity. However, the bone cement dries and hardens in about 10-12 minutes, and it cannot be shaped anymore. In addition, it is not easy to shape the intramedullary needle wrapped with bone cement, the diameter cannot be controlled, and it is very difficult to insert it into the medullary cavity. Too much bone cement will make it difficult to insert into the opening and a large amount of bone cement will remain at the opening, and effective drug concentration cannot be achieved at the site of intramedullary infection. In short, this technology is difficult to operate and time-limited. There is currently no instrument for shaping and measuring the diameter of the intramedullary needle wrapped with bone cement. Utility Model Content

[0004] To this end, the utility model provides a shaping and measuring device for an intramedullary nail wrapped with drug-loaded bone cement, which can well solve the above-mentioned problems. It can not only effectively determine the outer diameter of the prepared intramedullary nail wrapped with bone cement, but also help shape the bone cement, greatly reducing the difficulty of the operation and improving the surgical effect.

[0005] In order to achieve the purpose of this utility model, the following technical solutions are adopted:

[0006] A shaping and measuring device for an intramedullary nail wrapped with drug-loaded bone cement comprises a main body, wherein: the main body is rectangular, an opening is formed on the main body, the opening is a through hole, and a size mark is provided on the main body near the opening; the size mark is arranged on at least one surface of the main body; on one surface of the main body, a blade ring is provided around the opening, a center hole is provided at the center of the blade ring, the center hole has the same diameter as the opening, and the center hole is aligned with the opening, and the two are connected to each other.

[0007] The shaping and measuring device for the intramedullary nail wrapped with drug-loaded bone cement, wherein: the number of the openings is multiple, and the multiple openings are arranged in at least one row on the body.

[0008] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the wall thickness of the blade ring is relatively thin.

[0009] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the blade ring is fixed on the body or detachably installed on the body.

[0010] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the blade ring is installed on the body by means of threaded connection.

[0011] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: a groove is provided around the opening on the back of the body, and internal threads are machined in the groove. The lower part of the blade ring is provided with external threads, and the lower part of the blade ring is threadedly engaged with the internal threads of the groove and installed in the groove.

[0012] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the body is a long strip-shaped plate with a length much greater than the width.

[0013] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the body is made of a metal material, and the metal material includes stainless steel and titanium alloy.

[0014] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the blade ring is made of a metal material, and the metal material includes stainless steel and titanium alloy.

[0015] The shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle, wherein: the wall thickness of the blade ring is 0.3 - 0.6 mm. Description of the Drawings

[0016] Figure 1 It is the front view of the shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle;

[0017] Figure 2 It is the top view of the shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle;

[0018] Figure 3 It is the rear view of the shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle;

[0019] Figure 4 It is the structural schematic diagram of the shaping and measuring device for the drug-loaded bone cement-wrapped intramedullary needle. Detailed Embodiments

[0020] The following is combined with the attached Figures 1-4, a detailed description of the specific embodiments of the present utility model will be given. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of protection of the present utility model. The described embodiments are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0021] As Figure 1 shown, the shaping and measuring device for the drug-loaded bone cement wrapped intramedullary needle of the present utility model includes a body 1. The body 1 is rectangular, specifically a long strip plate with a length much greater than the width, and can be made of metal materials such as stainless steel and titanium alloy. An opening 2 is provided on the body 1. The opening 2 is a through hole. The number of the openings 2 can be multiple, and the multiple openings 2 are arranged in a row on the body 1.

[0022] As Figure 1 、 3 shown, both the front and back of the body 1 are marked with size marks near the opening 2, such as 9mm, 10mm, 11mm, for identifying the diameter of the opening 2.

[0023] Optionally, the shaping and measuring device for the drug-loaded bone cement wrapped intramedullary needle may also be provided with a cutting ring. As Figure 2 shown, a cutting ring 3 is provided around the opening 2 on the back of the body 1. The cutting ring 3 is a hollow cylindrical structure with a relatively thin wall thickness. A central hole 4 is provided in the center. The central hole 4 has the same diameter as the opening 2, and the central hole 4 is aligned with the opening 2 and the two are connected to each other.

[0024] Optionally, the height of the cutting ring 3 is 1 - 3 cm, and the wall thickness is 0.3 - 0.6 mm. The material of the cutting ring 3 is metal materials such as stainless steel and titanium alloy.

[0025] In the present utility model, the cutting ring 3 can be fixed on the body 1 or can be installed on the body 1 in a detachable manner.

[0026] As Figure 3 shown, a groove 5 is provided around the opening 2 on the back of the body 1. The groove 5 is processed with internal threads. The cutting ring 3 is an independent part, and an external thread is provided at the lower part. The lower part of the cutting ring 3 is threadedly engaged with the internal thread of the groove 5 and is installed in the groove 5.

[0027] Optionally, two rows of openings 2 can be provided on the body 1 of the shaping and measuring device for the drug-loaded bone cement wrapped intramedullary needle of the present patent. As Figure 4As shown, two rows of openings are parallel to each other and spaced a predetermined distance apart. The diameters of the openings 2 in the first row are 9 mm, 10 mm, 11 mm, and 12 mm respectively; the diameters of the openings 2 in the second row are 13 mm, 14 mm, 15 mm, and 16 mm respectively. The other structures of the drug-loaded bone cement-wrapped intramedullary needle shaping and measuring device with two rows of openings are the same as above.

[0028] When the present utility model is in use, during the operation, the doctor coats the intramedullary needle with drug-loaded bone cement and compares the thickness of the intramedullary needle with the corresponding-sized openings on the drug-loaded bone cement-wrapped intramedullary needle shaping and measuring device. If the dosage is significantly less, the amount of bone cement can be increased again. If there is too much bone cement, the intramedullary needle can be inserted through the blade ring on the back of the body. At this time, the excess bone cement will be scraped off by the wall of the blade ring, so that the diameter of the bone cement remaining on the intramedullary needle meets the requirements, achieving the shaping effect. At the same time, since the blade ring can be disassembled, the whole instrument is convenient to store, and the blade ring can be cleaned separately after use, improving the cleaning efficiency.

[0029] The above is only a preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A shaping and measuring device for an intramedullary nail wrapped with drug-loaded bone cement, comprising a body, characterized in that: The main body is rectangular and has an opening thereon, the opening being a through hole, and a size mark is provided on the main body near the opening; the size mark is provided on at least one surface of the main body; on one surface of the main body, a blade ring is provided around the opening, a center hole is provided at the center of the blade ring, the center hole has the same diameter as the opening, and the center hole is aligned with the opening, and the two are connected to each other.

2. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The number of the openings is multiple, and the multiple openings are arranged in at least one row on the body.

3. The shaping and measuring device for drug-loaded bone cement-wrapped intramedullary nail according to claim 1, characterized in that: The wall thickness of the blade ring is relatively thin.

4. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The blade ring is fixed on the body or detachably installed on the body.

5. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The blade ring is mounted on the body by threaded connection.

6. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 5, characterized in that: A circle of grooves is arranged around the opening on the back of the body, and the grooves are processed with internal threads. The lower part of the blade ring is provided with external threads, and the lower part of the blade ring is installed in the groove through the external threads matching with the internal threads of the groove.

7. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The main body is a long strip plate with a length much greater than a width.

8. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The body is made of metal material, including stainless steel and titanium alloy.

9. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 1, characterized in that: The blade ring is made of metal material, including stainless steel and titanium alloy.

10. The shaping and measuring device for intramedullary nail wrapped with drug-loaded bone cement according to claim 3, characterized in that: The wall thickness of the blade ring is 0.3-0.6mm.

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