CN214907672U

CN214907672U - Medullary cavity reaming device matched with intramedullary nail anatomy

Info

Publication number: CN214907672U
Application number: CN202023230012.3U
Authority: CN
Inventors: 房志刚; 李平敬; 贺军; 陆立荣
Original assignee: Dean Medical Technology Co ltd
Current assignee: Dean Medical Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-28
Publication date: 2021-11-30
Anticipated expiration: 2030-12-28
Also published as: CN112716562A

Abstract

The utility model relates to a with intramedullary nail anatomy assorted pulp cavity reaming device, its innovation point lies in: including the rigidity reaming pole, be equipped with the reaming arch of vertically and horizontally staggered arrangement on the periphery wall of rigidity reaming pole, the rigidity reaming pole is including distal end section, near-end section and the section of handling that each other is as an organic whole or fixed connection, the whole of distal end section is the arc form. The utility model discloses can cut the sclerotin and stereotype the reaming to the pulp cavity to set up and dissect the insert passageway of appearance looks adaptation with the intramedullary nail, reduced the pulp cavity wall extrusion force that the intramedullary nail received in the insertion process moreover, warp, make can keep with the external same accuracy in vitro after inserting the pulp cavity at the distal end aiming device when subsequently implanting the intramedullary nail, improve the location precision.

Description

Medullary cavity reaming device matched with intramedullary nail anatomy

Technical Field

The utility model relates to a reaming device, concretely relates to reaming device suitable for thighbone and shin bone pulp chamber among bone surgery belongs to medical instrument technical field.

Background

Modern tibial intramedullary nails are widely applied to bone fracture and have the advantages of simple operation, stable structure and small wound. In the traditional intramedullary nail fixation operation, the problem of low precision always exists in the location aiming of the distal end hole site of the intramedullary nail, and the main reason is that the intramedullary nail is deformed by the extrusion of the medullary cavity wall in the process of being inserted into the medullary cavity, so that deviation is generated between the intramedullary nail and an external aiming device, the phenomenon of inaccurate location is caused, and the operation efficiency and the effect are further influenced. In order to overcome the above phenomena, a doctor can pre-establish a channel for facilitating the insertion of an intramedullary nail, specifically, a soft rod is provided with a drill bit with a specification adapted at the head part, and the medullary cavity is reamed by the drill bit.

Disclosure of Invention

The utility model aims at: provides a medullary cavity reaming device which can ream the medullary cavity by cutting bone, establishes an insertion channel matched with the anatomical shape of the intramedullary nail and reduces the medullary cavity wall extrusion force applied to the intramedullary nail in the insertion process.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a reaming device of pulp cavity with intramedullary nail anatomy assorted which innovation point lies in: including the rigidity reaming pole, be equipped with the reaming arch of vertically and horizontally staggered arrangement on the periphery wall of rigidity reaming pole, the rigidity reaming pole is including distal end section, near-end section and the section of handling that each other is as an organic whole or fixed connection, the whole of distal end section is the arc form.

In the above technical scheme, the rigid reaming rod is a hollow rod, and the outer wall of the rigid reaming rod is provided with a through hole communicated with the inner cavity of the rigid reaming rod and used for draining bone marrow grease.

In the above technical solution, the through hole is a circular through hole or a kidney-circular through hole.

In the technical scheme, the radian of the distal section of the rigid reaming rod is 4-8 degrees.

In the technical scheme, the head of the distal end section of the rigid reaming rod is provided with a guide conical section, and the outer surface of the guide conical section is smooth.

In the above technical solution, the proximal section of the rigid reamer spindle is entirely conical.

In the above technical scheme, part of the peripheral wall of the handling section of the rigid reaming rod is provided with the reaming bulges which are arranged in a criss-cross manner, the peripheral wall of the rest part is smooth, and the tail part of the rest part is provided with the positioning notch connected with the electric tool.

In the technical scheme, the whole handling section of the rigid reaming rod is arc-shaped, the radian of the handling section is 3-7 degrees, and the outer diameter of the far-end section of the rigid reaming rod is smaller than that of the handling section.

In the above technical solution, the whole of the handling section is arc-shaped, and a plane where the arc-shaped handling section is located is perpendicular to a plane where the arc-shaped distal end section is located.

In the technical scheme, the reaming bulge of the rigid reaming rod is a file tooth or a bulge with a pointed head at the end part, and when the expansion bulge is the file tooth, the height of the expansion bulge is controlled within the range of 0.8 mm-2 mm.

The utility model discloses the positive effect who has is: adopt the utility model discloses an after dissecting assorted pulp cavity reaming device with intramedullary nail, because the utility model discloses a rigidity reaming pole, be equipped with vertically and horizontally staggered arrangement's reaming arch on the periphery wall of rigidity reaming pole, rigidity reaming pole is including each other distal segment, near-end section and the section of handling that is as an organic whole or fixed connection, the whole of distal segment is the arc form, if pulp cavity inner space is difficult to implant the intramedullary nail because of less, before this doctor inserts rigidity reaming pole in advance in the pulp cavity, and rigidity reaming pole is at pulp cavity reciprocating vibration for the reaming arch of rigidity reaming pole periphery wall is realized filing the sclerotin to pulp cavity wall, improves design reaming effect, like this, compares with prior art, the utility model discloses just can establish the insert channel of dissecting assorted pulp cavity appearance looks adaptation with intramedullary nail, and reduced the pulp cavity wall extrusion force that the intramedullary nail received at the insert in-process extrusion force, The deformation enables the far-end aiming device inserted into the medullary cavity to keep the same accuracy in vitro, and ensures that the intramedullary nail can be inserted more smoothly, so that the accurate reaming of the medullary cavity is realized, the far-end positioning aiming accuracy of the intramedullary nail is improved, and the operation efficiency and effect of the subsequent implanted intramedullary nail are improved.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the present invention;

FIG. 2 is a schematic left side view of FIG. 1;

FIG. 3 is a schematic view of a partial cross-sectional structure of the rigid reamer of the present invention;

FIG. 4 is an enlarged schematic view of the counterbore protrusion of FIG. 1;

fig. 5 is a schematic perspective view of the present invention;

fig. 6 is a schematic diagram of fig. 4 after the plane is established.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, but is not limited thereto.

As shown in fig. 1, 2, 3, 4 and 5, a medullary cavity reaming device anatomically matched with an intramedullary nail comprises a rigid reaming rod 1, wherein reaming protrusions 2 which are arranged in a criss-cross manner are arranged on the peripheral wall of the rigid reaming rod 1, the rigid reaming rod 1 comprises a distal end section 11, a proximal end section 12 and a handling section 13 which are integrated or fixedly connected with each other, and the entirety of the distal end section 11 is arc-shaped.

When a prior femur or tibia fracture needs to be reamed, excessive medullary cavity pressure can cause fat particles in the bone marrow to enter blood vessels from ruptured veins. These fat particles tend to cause pulmonary embolism as the blood flows to the lungs; flow to the heart is liable to cause myocardial infarction; it flows to the brain and is liable to cause cerebral infarction. In order to solve the problem, as shown in fig. 3, the rigid reaming rod 1 is a hollow rod, and a plurality of through holes 3 communicated with an inner cavity of the rigid reaming rod 1 and distributed in a staggered manner for draining bone marrow grease are arranged on the outer wall of the rigid reaming rod 1. Thus, the utility model discloses at the during operation, the sclerotin that the reaming marrow dropped, by during materials such as extruded yellow marrow can get into the inner chamber of rigidity reaming pole 1 through-hole 3, like this can the yellow marrow of significantly reducing is extruded the possibility that gets into the blood vessel, prevents the emergence probability that the fat decreases the stopper.

As shown in fig. 4, in order to make the structure more reasonable, the through hole 3 of the present invention is a circular through hole or a waist-round through hole.

As shown in fig. 2 and 5, further, in order to make the present invention capable of keeping the same with different anatomical shapes of intramedullary nails, the radian of the distal section 11 is 4 to 8 °. That is, as shown in FIG. 2, the distal section has an outward deflection angle A of 4 to 8.

As shown in fig. 1 and 2, in order to provide a guiding function during the insertion of the rigid reamer 1, the head of the distal section 11 of the rigid reamer 1 is provided with a guiding conical section 111, and the outer surface of the guiding conical section 111 is smooth.

As shown in fig. 1 and 2, in order to further improve the structural rationality of the present invention, the proximal section 12 of the rigid reamer 1 is tapered as a whole.

As shown in fig. 1, 2 and 5, in order to connect the handling section 13 with an external electric tool and improve the operation feeling of a doctor, part of the outer peripheral wall of the handling section 13 of the rigid reaming rod 1 is provided with reaming protrusions 2 arranged in a criss-cross manner, the outer peripheral wall of the rest part is smooth, and the tail part of the rest part is provided with a positioning notch 131 connected with the electric tool.

As shown in fig. 1 and 4, in order to further improve the consistency of the present invention with different anatomical shapes of intramedullary nails, the whole handling section 13 of the rigid reaming rod 1 is arc-shaped, and the radian of the handling section 13 is 3 to 7 °. That is, as shown in fig. 1, the handling section 13 has an outward deviation angle B of 3 ° to 7 °.

As shown in fig. 6, in order to ensure that the channel of the reaming device can be consistent with the implantation channel of the intramedullary nail implant when the reaming device is placed in the intramedullary canal, and the hole pattern can also be consistent with the intramedullary canal nail after the reaming device is used for reaming, so as to ensure that the intramedullary canal nail is conveniently implanted, the whole handling section 13 of the rigid reaming rod 1 is arc-shaped, and the plane of the arc-shaped handling section 13 is vertical to the plane of the arc-shaped distal end section 11.

As shown in fig. 1 and 2, in order to enhance the rigidity strength of the handling section 13 of the rigid reamer 1, the outer diameter of the distal end section 11 of the rigid reamer 1 is smaller than the outer diameter of the handling section 13.

As shown in fig. 1, 2 and 5, in order to achieve bone filing in the medullary cavity and improve reaming effect, the reaming protrusion 2 of the rigid reaming rod 1 is a tooth or a protrusion with a tip at the end.

As shown in FIG. 3, further, the expansion protrusion 2 of the present invention is preferably a tooth file, so as to improve the reaming efficiency, and the height thereof is controlled within the range of 0.8 mm-2 mm.

The utility model discloses a theory of operation: if the intramedullary nail is not easy to implant due to smaller space in the medullary cavity, a doctor inserts the rigid reaming rod 1 into the medullary cavity in advance, and the operation section 13 of the rigid reaming rod 1 is connected with an external electric tool, the rigid reaming rod 1 vibrates in the medullary cavity under the action of the electric tool, so that the reaming bulge 2 on the peripheral wall of the rigid reaming rod 1 realizes bone filing on the medullary cavity wall, and the shaping reaming effect is improved, thus compared with the prior art, the utility model can establish an insertion channel matched with the anatomical shape of the intramedullary nail, reduce the extrusion force and deformation of the medullary cavity wall in the insertion process of the intramedullary nail, ensure that the far-end aiming device can keep the same accuracy as that in vitro after being inserted into the medullary cavity when the intramedullary nail is subsequently implanted, ensure that the intramedullary nail can be inserted more smoothly, realize the accurate reaming of the medullary cavity, and improve the far-end positioning aiming accuracy of the intramedullary nail, thereby improving the operation efficiency and effect of subsequent intramedullary nail implantation. And a plurality of through holes 3 which are communicated with the inner cavity of the rigid hole expanding rod 1 and are arranged in a staggered manner for draining bone marrow grease are arranged on the outer wall of the rigid hole expanding rod 1. Thus, the utility model discloses at the during operation, the sclerotin that the reaming marrow dropped, by during materials such as extruded yellow marrow can get into the inner chamber of rigidity reaming pole 1 through-hole 3, like this can the yellow marrow of significantly reducing is extruded the possibility that gets into the blood vessel, prevents the emergence probability that the fat decreases the stopper.

To sum up, the utility model discloses a match is not only dissected with the intramedullary nail to medullary cavity reaming device's reaming pole, even keep the same accurate in vitro after implanting its distal end aiming device of intramedullary nail and inserting medullary cavity in the follow-up, moreover the utility model discloses can also get into rigidity reaming pole 1's inner chamber through-hole 3 with the sclerotin that drops, by materials such as extruded yellow marrow at design reaming in-process, yellow marrow that can significantly reduce like this is extruded and is got into vascular possibility, prevents the emergence probability that fat decreases the stopper.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A medullary cavity reaming device matched with intramedullary nail anatomy is characterized in that: including rigidity reaming pole (1), be equipped with the reaming arch (2) that vertically and horizontally staggered arranged on the periphery wall of rigidity reaming pole (1), rigidity reaming pole (1) is including each other distal end section (11), near-end section (12) and the section of handling (13) that are integrative or fixed connection, the whole of distal end section (11) is the arc form.

2. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the rigid reaming rod (1) is a hollow rod, and a through hole (3) communicated with the inner cavity of the rigid reaming rod (1) and used for draining bone marrow grease is formed in the outer wall of the rigid reaming rod.

3. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 2, wherein: the through hole (3) is a circular through hole or a waist-round through hole.

4. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the radian of the distal end section (11) of the rigid reaming rod (1) is 4-8 degrees.

5. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the head of the far end section (11) of the rigid reaming rod (1) is provided with a guide conical section (111), and the outer surface of the guide conical section (111) is smooth.

6. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the whole body of the proximal end section (12) of the rigid hole expanding rod (1) is conical.

7. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the outer peripheral wall of a part of the handling section (13) of the rigid hole expanding rod (1) is provided with hole expanding bulges (2) which are arranged in a criss-cross mode, the outer peripheral wall of the rest part is smooth, and the tail part of the rest part is provided with a positioning notch (131) connected with an electric tool.

8. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the whole handling section (13) of the rigid reaming rod (1) is arc-shaped, the radian of the handling section (13) is 3-7 degrees, and the outer diameter of the far-end section (11) of the rigid reaming rod (1) is smaller than that of the handling section (13).

9. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the whole handling section (13) is arc-shaped, and the plane where the arc-shaped handling section (13) is located is perpendicular to the plane where the arc-shaped far-end section (11) is located.

10. The intramedullary canal reaming device compatible with intramedullary nail anatomy of claim 1, wherein: the reaming bulge (2) of the rigid reaming rod (1) is a file tooth or a bulge with a tip at the end part, and the height of the reaming bulge (2) is controlled within the range of 0.8 mm-2 mm when the reaming bulge is a file tooth.