CN219021483U - Double-end pressurization formula screw needle - Google Patents

Abstract

The utility model discloses a double-head pressurized threaded needle, which is characterized in that a needle body is sequentially divided into a needle part, a screwing part, a breaking part and a needle body part which are integrally formed, wherein a screwing thread is arranged on the periphery of the outer end of the needle part, a pressurizing thread is arranged on the periphery of the tail end of the needle part, the outer diameter of the pressurizing thread is larger than that of the screwing thread, the sum of the lengths of the screwing thread and the pressurizing thread does not exceed the length of the needle part, the diameter of the screwing part is larger than that of the needle part, and the diameter of the breaking part is smaller than that of the needle part. When the needle head part is screwed in, the screw thread and the pressurizing thread are used for oppositely pressurizing bones at two sides of the fracture, so that the pressurizing stability is ensured; the screwing part can also facilitate secondary pressurization and also facilitate the later extraction work of the threaded needle; the small-diameter breaking part is arranged at the screwing part, so that a worker can break off the redundant tail conveniently, and even if the breaking part breaks suddenly during screwing, the screwing part can be used for continuing screwing. The threaded needle is convenient to use and simple to operate.

Description

Double-end pressurization formula screw needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a double-head pressurizing type threaded needle.

Background

A pressurized threaded needle (also called a threaded nail) belongs to one of medical instruments, is mainly used for treating fracture, and closes a fracture line by using pressure. When the common threaded needle is used, firstly, a threaded needle with proper length is selected, the tail part of the threaded needle is clamped on an electric hand drill, and the head part of the threaded needle is screwed in along a pore canal; then, when the screw needle is in depth at one end of the screw needle, the screw threads on the screw needle body pull bones at two sides of the fracture part to each other, so that the fracture line is closed; finally, the overlong tail of the threaded needle is sheared, and a certain residual length is reserved, so that the threaded needle is pulled out in the later period.

In the prior art, the conventional threaded needle has the following defects: firstly, when a common threaded needle is used, the whole-section sizing thread is used for pressurizing and closing bones at two sides of a fracture part, but the problem that the fracture part firstly attacks the bones at one side of the thread is solved, because the screwing thread is worn for a long time, the phenomena of loosening of the bones and the screwing thread are easy to occur, and the opposite pressurizing effect at two sides of the fracture part is insufficient, so that the pressurizing is insufficient, and the fracture line is not tightly closed is solved; secondly, when the needle body shears redundant tail parts, not only tools are needed, but also the needle body is complex and laborious.

Disclosure of Invention

The utility model aims to provide a double-end pressurizing type threaded needle, which solves the problems that the tail part is not easy to cut off and the phenomena of loosening of bones and screw threads are easy to occur when the traditional sizing threaded needle is used.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a double-end pressurized thread needle, includes the needle body, the needle body divide into integrated into one piece's tip portion, connects portion soon, rupture portion and needle body portion in proper order, be provided with the screw in screw thread on the periphery of tip portion outer end, set up the pressurization screw thread on the outer peripheral face of tip portion tail end, the external diameter of pressurization screw thread is greater than the external diameter of screw in screw, screw in screw with the length sum of pressurization screw in does not surpass the length of tip portion, the diameter of portion soon is greater than the diameter of tip portion, the diameter of rupture portion is less than the diameter of tip portion.

The further technical scheme is as follows: the section of the screwing part is hexagonal or quincuncial.

The further technical scheme is as follows: the breaking part is a conical rod, and one small-caliber end of the conical rod is connected with the screwing part.

The further technical scheme is as follows: the pressurizing thread is a reducing thread, the large-diameter end of the reducing thread is arranged towards the screwing part, and the minimum outer diameter of the reducing thread is larger than the outer diameter of the screwing thread.

The further technical scheme is as follows: the outer end of the needle body is provided with connecting threads.

The further technical scheme is as follows: the outer end of the needle part is provided with at least one opening.

Compared with the prior art, the utility model has at least one of the following beneficial effects:

according to the double-end pressurizing type threaded needle, the threaded needle is provided with the screwing threads and the pressurizing threads at the needle head part (the implantation part), so that two sections of thread structures can oppositely pressurize bones at two sides of a fracture joint during screwing, one side of the threads is prevented from being tapped into the bones at the fracture part, the phenomenon that the bones and the screwing threads are loosened easily due to long-time abrasion of the screwing threads is avoided, and the pressurizing stability is ensured; the screwing part can facilitate the personnel to carry out secondary pressurization by using the T-shaped wrench, and also facilitates the later-stage extraction work of the threaded needle; the small-diameter breaking part is arranged at the screwing part, so that a worker can break off the redundant tail conveniently, and even if the breaking part breaks suddenly during screwing, the screwing part can be used for continuing screwing. The threaded needle is convenient to use and simple to operate.

Drawings

Fig. 1 is a schematic view of a double-ended pressurized threaded needle according to the present utility model.

Fig. 2 is a schematic view of the structure of fig. 1 at another view angle according to the present utility model.

Fig. 3 is a schematic diagram of the present utility model in full section of fig. 2.

Fig. 4 is a schematic structural view of another structure of fig. 1 according to the present utility model.

Reference numerals: 1. a needle body; 2. a needle portion; 3. a screwing part; 4. a breaking part; 5. a needle body; 6. screwing in a thread; 7. pressurizing threads; 8. a connecting thread; 9. and (5) a notch.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiment one:

the embodiment is shown in fig. 1, 2 and 3, and the double-end pressurized threaded needle comprises a needle body 1, wherein the needle body 1 is sequentially divided into a needle head 2, a screwing part 3, a breaking part 4 and a needle body 5 which are integrally formed, a screwing thread 6 is arranged on the periphery of the outer end of the needle head 2, a pressurizing thread 7 is arranged on the periphery of the tail end of the needle head 2, the outer diameter of the pressurizing thread 7 is larger than that of the screwing thread 6, the sum of the lengths of the screwing thread 6 and the pressurizing thread 7 does not exceed the length of the needle head 2, the diameter of the screwing part 3 is larger than that of the needle head 2, and the diameter of the breaking part 4 is smaller than that of the needle head 2.

The working process of the utility model is as follows: the thread needle is mainly applied to the metaphyseal end of limbs, calcaneus and patella; the implantation form is as follows: the implanted part of the product is below the broken part 4 in fig. 1 (the left part of the broken part 4 in fig. 2 or 3), when in use, a threaded needle with proper length is selected according to the condition of the broken part, the tail part of the needle body 5 is clamped on an electric hand drill and screwed in along a pore canal, the screwing-in thread 6 of the needle head 2 tightens one side bone of the broken part, the pressurizing thread 7 can abut against the other side bone surface of the broken part while screwing in the bone, the effect of bidirectionally pressurizing the broken part is realized, and the broken line is automatically closed; in the screwing process, when the limited torque is reached, the threaded needle automatically breaks from the self-breaking part 4, or when the limited torque is not reached, the threaded needle can be manually bent and broken at the breaking part 4 to move out of the electric hand drill. And finally, checking whether the fracture surface meets the closing requirement, and if the fracture surface does not meet the closing requirement, continuously screwing and pressurizing the joint part 3 by using a T-shaped spanner. Meanwhile, the screwing part 3 can be conveniently used for screwing by a T-shaped spanner at a later stage. When the needle part 2 is taken out.

Notably, are: the diameter of the pressurizing thread 7 is larger than that of the screwing thread 6, so that the problems that when a general threaded needle is used, the whole-section sizing thread is used for pressurizing and closing bones at two sides of a fracture part, but the fracture part is firstly tapped into one side of the thread, the screwing thread is worn for a long time, the phenomenon that the bone and the screwing thread are loosened easily occurs, the pressurizing is insufficient, and the fracture line is not tightly closed are avoided.

The screw thread needle is provided with the screw thread and the pressurizing thread at the needle head part (the implantation part), so that when the screw thread is screwed in, two sections of thread structures can oppositely pressurize bones at two sides of a fracture, and the phenomenon that the bone is loosened from the screw thread due to long-time abrasion of the screw thread caused by the screw thread is avoided, thereby ensuring the stability of pressurizing; the screwing part can facilitate the personnel to carry out secondary pressurization by using the T-shaped wrench, and also facilitates the later-stage extraction work of the threaded needle; the small-diameter breaking part is arranged at the screwing part, so that a worker can break off the redundant tail conveniently, and even if the breaking part breaks suddenly during screwing, the screwing part can be used for continuing screwing. The threaded needle is convenient to use and simple to operate.

Preferably, the cross section of the screwing part 3 is hexagonal or quincuncial.

And the secondary pressurization is convenient for matching with other tools.

Embodiment two:

in the above embodiment, as shown in fig. 4, the breaking portion 4 is formed as a tapered rod, and the small diameter end of the tapered rod is connected to the screwing portion 3.

Depending on the object used, bones in different locations use tapered rods of different thicknesses to meet different break limiting torque requirements.

The small caliber of the conical rod is generally easier to break, so that the broken part is closer to the screwing part 3 as much as possible, the breaking of the breaking part 4 is more thorough, the smoothness of the outer surface of the screwing part 3 is ensured, and the influence on the human tissues of a patient is avoided.

Preferably, the pressure screw 7 is a variable diameter screw, the large diameter end of which is provided toward the screwing part 3, and the minimum outer diameter of which is larger than the outer diameter of the screwing screw 6.

The variable-diameter screw thread can be screwed into the bone, and simultaneously can expand a new screw thread matching structure with the bone, and can also be matched with the screw thread 6, so that the opposite pressurizing and closing effects are achieved on the two sides of the fracture.

Preferably, the outer end of the needle body 5 is provided with a connecting thread 8.

And the tool is convenient to be matched with other tools.

Preferably, the outer end of the needle part 2 is provided with at least one notch 9.

The notch 9 can hold bone fragments during screwing in to prevent the bone from being broken by expansion.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (6)

1. The double-end pressurized type threaded needle comprises a needle body (1), and is characterized in that: needle body (1) divide into integrated into one piece's syringe needle portion (2), connects portion (3), rupture portion (4) and needle body portion (5) soon in proper order, be provided with screw in screw thread (6) on the periphery of syringe needle portion (2) outer end, set up pressurization screw thread (7) on the outer peripheral face of syringe needle portion (2) tail end, the external diameter of pressurization screw thread (7) is greater than the external diameter of screw in screw thread (6), screw in screw thread (6) with the sum of the length of pressurization screw thread (7) does not exceed the length of syringe needle portion (2), the diameter of portion (3) soon is greater than the diameter of syringe needle portion (2), the diameter of rupture portion (4) is less than the diameter of syringe needle portion (2).

2. A double-ended pressurized thread needle as claimed in claim 1 wherein: the section of the screwing part (3) is hexagonal or quincuncial.

3. A double-ended pressurized thread needle as claimed in claim 1 wherein: the breaking part (4) is a conical rod, and one small-caliber end of the conical rod is connected with the screwing part (3).

4. A double-ended pressurized thread needle as claimed in claim 1 wherein: the pressurizing thread (7) is a reducing thread, the large-diameter end of the reducing thread is arranged towards the screwing part (3), and the minimum outer diameter of the reducing thread is larger than the outer diameter of the screwing thread (6).

5. A double-ended pressurized thread needle as claimed in claim 1 wherein: the outer end of the needle body (5) is provided with a connecting thread (8).

6. A double-ended pressurized thread needle as claimed in claim 1 wherein: the outer end of the needle head part (2) is provided with at least one opening (9).

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