A new type of spiral blade for medical intramedullary nail

Abstract

The utility model relates to the technical field of medical intramedullary nails, and specifically to a novel medical intramedullary nail spiral blade, comprising a blade body, a connecting assembly is provided inside the blade body, and a plurality of groups of spiral blades are provided outside the blade body, a through groove is opened inside the spiral blade, and a sleeve is provided at one end of the blade body away from the spiral blade; the connecting assembly is used for connecting the blade body with the sleeve, and the connecting assembly consists of a fixed block, a connecting block, a clamping block, an extrusion ring, a sealing ring and a guide groove, the fixed block is located inside the blade body and close to one end of the sleeve, the connecting block is threadedly connected to the outside of the fixed block, two groups of the clamping blocks are respectively located at one end of the connecting block and the fixed block close to each other, and the extrusion ring is located inside the fixed block. Compared with the existing spiral blade, the utility model can improve the overall safety of the spiral blade through design.

Description

Technical Field

[0001] The utility model relates to the technical field of medical intramedullary nails, in particular to a novel spiral blade for medical intramedullary nails. Background Art

[0002] With the progress of society and the development of medicine, fracture surgery is becoming more and more advanced. Intramedullary nailing can be used to connect and fix broken bones. Intramedullary surgery can control the axial force line of the fracture site. Locking intramedullary nails can prevent rotational deformity of the fracture and reduce the risk of fracture of the implant. The use of closed and minimally invasive techniques can reduce the surgical infection rate. The use of spiral blades can facilitate the patient's weight-bearing.

[0003] After searching, the announcement number CN214104579U discloses an anti-rotation combination structure of an intramedullary nail spiral blade, comprising: a blade, whose outer wall is provided with a plurality of grooves arranged in a circumference, and the length direction of each groove is parallel to the axial direction of the blade; an anti-rotation device, which comprises: a cylinder, which is suitable for being inserted from the end of the blade along the axial direction of the blade; the inner wall of the cylinder is protruding with a protrusion matched with the groove; the anti-rotation device is inserted from the end of the blade, and at this time the protrusion is matched with the groove, thereby limiting the rotation of the blade. During the hand speed process, only the insertion depth of the blade needs to be considered, and there is no need to consider the anti-rotation position of the blade; its defect is that: the spiral blade may cut or penetrate the acetabulum, which may lead to internal fixation fracture failure, etc. Therefore, it is particularly important to improve the existing spiral blade and design a new type of medical intramedullary nail spiral blade to solve the above-mentioned technical defects and improve the safety of the overall spiral blade. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of medical intramedullary nail spiral blade, which combines bone cement with the spiral blade, injects a certain amount of bone cement into the bone structure, improves the immediate stability of internal fixation, and fills the loose gap with bone cement, which has a certain buffering effect on the fracture structure and adjacent parts, reduces the local stress around the fracture, and can effectively avoid the main nail from cutting out, penetrating, and withdrawing after surgery. The patient's own joints are retained, and the patient can get out of bed early after surgery to carry out partial weight-bearing activities, avoiding the occurrence of deep vein thrombosis, bedsores, aspiration pneumonia, and urinary tract infection caused by long-term bed rest, and improving the overall safety of the spiral blade to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel medical intramedullary nail spiral blade comprises a blade body, a connecting assembly is arranged inside the blade body, and a plurality of spiral blades are arranged outside the blade body, a through groove is opened inside the spiral blade, and a sleeve is arranged at one end of the blade body away from the spiral blade;

[0007] The connecting assembly is used for connecting the blade body and the sleeve.

[0008] As a preferred solution of the utility model, the connecting assembly consists of a fixed block, a connecting block, a clamping block, an extrusion ring, a sealing ring and a guide groove, the fixed block is located inside the blade body and close to one end of the sleeve, the connecting block is threadedly connected to the outside of the fixed block, the two groups of the clamping blocks are respectively located at one end of the connecting block and the fixed block close to each other, the extrusion ring is located inside the fixed block, the sealing ring is located inside the fixed block and on the outside of the connecting block, and the guide groove is opened inside the connecting block and away from one end of the clamping block.

[0009] As a preferred solution of the utility model, the two groups of the clamping blocks are designed to be corresponding, and the connecting block is connected to the extrusion ring via the clamping block.

[0010] As a preferred solution of the utility model, a thread groove is formed at one end of the connection block away from the guide groove, the internal structure size of the thread groove is designed to correspond to the external structure size of the sleeve, and the sleeve is connected to the connection block via the thread groove.

[0011] As a preferred solution of the utility model, a gasket is provided inside the fixing block and at one end close to the sealing ring, and the fixing block is connected to the sealing ring through the gasket.

[0012] As a preferred solution of the utility model, a connecting groove is opened inside the blade body, and the blade body is connected to the through groove and the guide groove respectively through the connecting groove.

[0013] As a preferred solution of the utility model, a plurality of groups of spiral blades are distributed at equal intervals on the outside of the blade body, and a plurality of groups of mud dispersion holes are provided inside the spiral blades.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, the sleeve is connected to the threaded groove through the design of the connecting assembly and the sleeve, so that the sleeve can be connected to the connecting block, and the sleeve is rotated again to drive the connecting block to rotate, so that the connecting block can be threadedly connected to the fixing block. When the connecting block is connected to the fixing block, the two groups of clamping blocks are connected to each other, so that the connecting block can be connected to the extrusion ring through the clamping block. When the clamping block contacts the sealing ring through the extrusion ring, the sealing ring can be squeezed by the gasket, so that the sealing ring fits the outer side of the connecting block. When the connecting block is connected to the fixing block, the stability of the connection can be increased to prevent leakage of bone cement. Thereby, the bone cement inside the sleeve can be introduced into the interior of the connecting block. When the bone cement is introduced into the interior of the through groove, the bone cement can be introduced into the interior of the loose mud hole, discharged from the outside of the spiral blade, and evenly diffused into the bone structure, thereby improving the immediate stability of internal fixation. The loose gap filled with bone cement has a certain buffering effect on the fracture structure and adjacent parts, reducing the local stress around the fracture, and can effectively avoid the main nail from cutting out, penetrating, and withdrawing after surgery, preserving the patient's own joints, allowing the patient to get out of bed early after surgery to partially bear weight, thereby avoiding the occurrence of deep vein thrombosis, bedsores, aspiration pneumonia, and urinary tract infection caused by long-term bed rest. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the blade body of the utility model;

[0018] Figure 3 For this utility model Figure 2 A is a schematic diagram of the enlarged structure.

[0019] In the figure: 1. blade body; 2. connecting assembly; 3. spiral blade; 4. through groove; 5. sleeve; 6. fixing block; 7. connecting block; 8. clamping block; 9. extrusion ring; 10. sealing ring; 11. guide groove; 12. gasket; 13. connecting groove; 14. mud loosening hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0023] A novel medical intramedullary nail spiral blade comprises a blade body 1, a connecting assembly 2 is arranged inside the blade body 1, and a plurality of spiral blades 3 are arranged outside the blade body 1, a through groove 4 is opened inside the spiral blade 3, and a sleeve 5 is arranged at one end of the blade body 1 away from the spiral blade 3;

[0024] The connecting assembly 2 is used for connecting the blade body 1 and the sleeve 5 .

[0025] Furthermore, the connecting assembly 2 is composed of a fixed block 6, a connecting block 7, a clamping block 8, an extrusion ring 9, a sealing ring 10 and a guide groove 11. The fixed block 6 is located inside the blade body 1 and close to one end of the sleeve 5. The connecting block 7 is threadedly connected to the outside of the fixed block 6. The two groups of clamping blocks 8 are respectively located at one end of the connecting block 7 and the fixing block 6 close to each other. The extrusion ring 9 is located inside the fixing block 6. The sealing ring 10 is located inside the fixing block 6 and outside the connecting block 7. The guide groove 11 is opened inside the connecting block 7 and away from the end of the clamping block 8. The sleeve 5 is connected to the connecting assembly 2 so that the sleeve The tube 5 can be sealed and connected with the blade body 1, and the bone cement inside it is introduced into the interior of the blade body 1 through the sleeve 5, and is discharged by the spiral blade 3 and evenly diffused into the bone structure, thereby improving the immediate stability of internal fixation. The bone cement filling the loose gap has a certain buffering effect on the fracture structure and adjacent parts, reduces the local stress around the fracture, and can effectively avoid the main nail from cutting out, penetrating, and withdrawing after surgery, preserves the patient's own joints, and allows the patient to get out of bed early after surgery to carry out partial weight-bearing activities, thereby avoiding the occurrence of deep vein thrombosis, bedsores, aspiration pneumonia, and urinary tract infections caused by long-term bed rest.

[0026] Among them, the two groups of clamping blocks 8 are designed correspondingly, and the connecting block 7 is connected to the extrusion ring 9 through the clamping block 8. The two groups of clamping blocks 8 are connected to each other so that the connecting block 7 can be connected to the extrusion ring 9 through the clamping block 8.

[0027] Secondly, a threaded groove is provided at one end of the connecting block 7 away from the guide groove 11. The internal structure size of the threaded groove is designed to correspond to the external structure size of the sleeve 5. The sleeve 5 is connected to the connecting block 7 through the threaded groove. The sleeve 5 is connected to the threaded groove so that the sleeve 5 can be connected to the connecting block 7, thereby allowing the bone cement inside the sleeve 5 to be introduced into the interior of the connecting block 7.

[0028] Furthermore, a gasket 12 is provided inside the fixing block 6 and at one end close to the sealing ring 10, and the fixing block 6 is connected to the sealing ring 10 through the gasket 12. When the clamping block 8 contacts the sealing ring 10 through the extrusion ring 9, the gasket 12 can squeeze the sealing ring 10, so that the sealing ring 10 fits the outer side of the connecting block 7. When the connecting block 7 and the fixing block 6 are connected, the stability of the connection can be increased to prevent leakage of bone cement.

[0029] Furthermore, a connecting groove 13 is opened inside the blade body 1, and the blade body 1 is connected to the through groove 4 and the guide groove 11 respectively through the connecting groove 13. The connecting groove 13 is connected to the through groove 4 and the guide groove 11 respectively, so that the blade body 1 can be connected to the through groove 4 and the guide groove 11.

[0030] Furthermore, multiple groups of spiral blades 3 are distributed at equal intervals on the outside of the blade body 1, and multiple groups of mud dispersion holes 14 are opened inside the spiral blade 3, and the mud dispersion holes 14 are connected to the through groove 4. When bone cement is introduced into the through groove 4, the bone cement can be introduced into the mud dispersion holes 14 and discharged from the outside of the spiral blade 3.

[0031] In this embodiment, the implementation scenario is specifically as follows: when the blade body 1 is in use, the sleeve 5 is connected to the thread groove so that the sleeve 5 can be connected to the connecting block 7, and the sleeve 5 is rotated again to drive the connecting block 7 to rotate so that the connecting block 7 can be threadedly connected to the fixing block 6. When the connecting block 7 is connected to the fixing block 6, the two groups of clamping blocks 8 are connected to each other, so that the connecting block 7 can be connected to the extrusion ring 9 through the clamping block 8. When the clamping block 8 contacts the sealing ring 10 through the extrusion ring 9, the gasket 12 can be used to squeeze the sealing ring 10, so that the sealing ring 10 fits the outer side of the connecting block 7. When the connecting block 7 is connected to the fixing block 6, the stability of the connection can be increased to prevent leakage of bone cement, thereby making the sleeve The bone cement inside the tube 5 can be introduced into the interior of the connecting block 7. When the bone cement is introduced into the interior of the through groove 4, the bone cement can be introduced into the interior of the loose mud hole 14, and discharged from the outside of the spiral blade 3, and evenly diffused into the bone structure, thereby improving the immediate stability of the internal fixation. The loose gap filled with bone cement has a certain buffering effect on the fracture structure and the adjacent parts, reducing the local stress around the fracture, and can effectively avoid the main nail from cutting out, piercing, and withdrawing after surgery, retaining the patient's own joints, and the patient can get out of bed early after surgery to carry out partial weight-bearing activities, thereby avoiding the occurrence of deep vein thrombosis, bedsores, aspiration pneumonia, and urinary tract infection caused by long-term bed rest. Compared with the existing spiral blades, the utility model can improve the overall safety of the spiral blades through design.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel medical intramedullary nail spiral blade, comprising a blade body (1), characterized in that: A connecting assembly (2) is provided inside the blade body (1), and a plurality of groups of spiral blades (3) are provided outside the blade body (1), a through slot (4) is provided inside the spiral blade (3), and a sleeve (5) is provided at one end of the blade body (1) away from the spiral blade (3); The connecting assembly (2) is used to connect the blade body (1) and the sleeve (5).

2. The novel spiral blade for medical intramedullary nail according to claim 1, characterized in that: The connecting assembly (2) is composed of a fixed block (6), a connecting block (7), a clamping block (8), an extrusion ring (9), a sealing ring (10) and a guide groove (11); the fixed block (6) is located inside the blade body (1) and close to one end of the sleeve (5); the connecting block (7) is threadedly connected to the outside of the fixed block (6); two groups of clamping blocks (8) are respectively located at one end of the connecting block (7) and the fixed block (6) close to each other; the extrusion ring (9) is located inside the fixed block (6); the sealing ring (10) is located inside the fixed block (6) and outside the connecting block (7); and the guide groove (11) is opened inside the connecting block (7) and at one end away from the clamping block (8).

3. The novel spiral blade for medical intramedullary nail according to claim 2, characterized in that: The two groups of the clamping blocks (8) are designed to be corresponding, and the connecting block (7) is connected to the extrusion ring (9) via the clamping blocks (8).

4. The novel spiral blade for medical intramedullary nail according to claim 2, characterized in that: A thread groove is formed at one end of the connection block (7) away from the guide groove (11); the internal structure size of the thread groove is designed to correspond to the external structure size of the sleeve (5); and the sleeve (5) is connected to the connection block (7) via the thread groove.

5. The novel spiral blade for medical intramedullary nail according to claim 2, characterized in that: A gasket (12) is provided inside the fixing block (6) and at one end close to the sealing ring (10), and the fixing block (6) is connected to the sealing ring (10) via the gasket (12).

6. The novel spiral blade for medical intramedullary nail according to claim 2, characterized in that: A connecting groove (13) is provided inside the blade body (1), and the blade body (1) is respectively connected to the through groove (4) and the guide groove (11) via the connecting groove (13).

7. The novel spiral blade for medical intramedullary nail according to claim 1, characterized in that: The plurality of groups of spiral blades (3) are distributed at equal intervals on the outside of the blade body (1), and the interior of the spiral blades (3) is provided with a plurality of groups of mud dispersion holes (14).

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