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Intramedullary lock nail with low cutting track

An intramedullary nail and low notch technology, applied in the field of intramedullary nail locking nails, can solve the problems of increasing the damage of the head area of ​​the locking nail to the cortical bone, high notch of the locking nail head of the intramedullary nail, irritating the soft tissue, etc. , to achieve the effect of simple structure, short learning curve and reduced irritation

Pending Publication Date: 2019-03-19
KANGHUI MEDICAL INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical application, the head of this kind of locking nail exposes a lot of bone surface, which is called too high notch. In this case, it will not cause obvious discomfort in the area with thick soft tissue, but if the soft tissue is placed in thinner After tibial intramedullary nailing, too high notch will cause obvious discomfort, which will often irritate the surrounding soft tissues, resulting in discomfort such as bulging, itching, etc.
At present, the only way to avoid excessive notch is to increase the screwing depth clinically, but at the same time, it will also increase the damage to the cortical bone in the head area of ​​the locking screw
In view of this, how to solve the problem of too high notch of the head of the intramedullary nail is a subject to be studied

Method used

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  • Intramedullary lock nail with low cutting track
  • Intramedullary lock nail with low cutting track
  • Intramedullary lock nail with low cutting track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 , image 3 , Figure 5 , Figure 7 As shown, the locking screw is screwed into the bone surface by rotating along the screw implantation channel, and after being compatible with the locking screw hole on the main nail, it is closely attached to the bone surface to complete the implantation. At this time, the height of the exposed part of the locking screw head 1 is H, The head of the trapezoidal cylindrical or hemispherical locking nails, the side close to the bone surface, adopts a flat design, which can be closely attached to the physiological tibial surface to the maximum extent, because there is no curved bottom surface design of the traditional locking nails , the H height of the exposed part has been significantly reduced, and the low notch effect required by the clinic has been achieved. The height of the head of the locking nail designed with this concept is at least 1.3mm lower than that of the traditional locking nail, and the notch can be ...

Embodiment 2

[0042] Such as figure 2 , Figure 4 , Figure 6 , Figure 8 As shown, the locking screw is screwed into the bone surface along the screw implantation channel, and after being compatible with the locking screw hole on the main nail, it is closely attached to the bone surface to complete the implantation. At this time, the height of the exposed part of the 1-locking screw head is H , the head of the trapezoidal cylindrical or hemispherical locking nail, and the side close to the bone surface, all adopt a flat design, which can be closely attached to the physiological tibial surface to the maximum extent, because there is no curved bottom surface of the traditional locking nail Design, the H height of the exposed part has been significantly reduced, and the low notch effect required by clinical practice has been achieved. The height of the head of the locking nail designed with this concept is at least 1.3mm lower than that of the traditional locking nail, and the notch can b...

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Abstract

The invention provides an intramedullary lock nail with a low cutting track, relates to a lock nail which cooperates with an intramedullary nail, and belongs to the technical field of medical instruments for orthopedic surgery. The intramedullary lock nail with the low cutting track consists of a lock nail head and a threaded rod; the lock nail head is arranged on the upper portion of the threadedrod, a screwing structure with an internal polyhedral angle sinking hole is arranged in the lock nail head, and is positioned in the center of the top end surface of the lock nail head; and a handheld structure is arranged in the lock nail head, and is positioned in the center of the bottom of the internal polyhedral angle sinking hole. The coronal plane of the lock nail head is a trapezoidal plane or a semispherical plane, wherein the range of a base angle of the trapezoidal plane is 15 degrees to 90 degrees, and edges of the periphery of the trapezoidal plane are subjected to rounding; andthe spherical height of the semispherical plane is smaller than half of a circle. The internal polyhedral angle sinking hole is an internal hexahedral angle sinking hole. The handheld structure is arranged to be a threaded hole of which the diameter is smaller than the diameter of the internal polyhedral angle sinking hole, and is positioned in the center of the bottom of the internal polyhedral angle sinking hole.

Description

technical field [0001] The invention relates to a low-profile intramedullary nail locking nail, which relates to a locking nail compatible with an intramedullary nail, and belongs to the technical field of orthopedic surgery medical instruments. Background technique [0002] Intramedullary nail is a commonly used internal fixation device in orthopedics, mainly used for the treatment of long tubular fractures. The intramedullary nail generally consists of three parts: the main nail, the locking nail and the locking nail. The intramedullary nail locking nail is an important component of the intramedullary nail. During the operation, it passes through both ends of the intramedullary nail along the transverse direction. Its purpose includes two aspects: 1. Prevent the rotation of the fracture end after the intramedullary nail is fixed, and improve the prosthesis. Stability, 2. Fix the fracture block, make the fracture area form temporary stability, facilitate the formation of c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72A61B17/86
CPCA61B17/725A61B17/8615A61B17/8625
Inventor 裴磊杨兆权秦宗俊
Owner KANGHUI MEDICAL INNOVATION
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