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Intramedullary repositor for long bone fracture of limbs

A technology of reducer and long bone, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problems of high brittleness, secondary injury, and complicated operation of the device

Pending Publication Date: 2021-05-11
THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of this scheme, the two fractured bones may have lateral or / and anteroposterior angular deformities, and it is necessary to continuously rotate the reset rod to adjust the angle of the reset head so that it can enter the contralateral fractured bone. The auxiliary device C-arm machine performs repeated perspective monitoring and guidance, so there are the following problems: (1) The operation of the device is too complicated, and it relies too much on the experience of the operator, and there is great uncertainty; (2) The device uses advanced The way of reset and then threading, but the reset head enters the medullary cavity of the contralateral fractured bone is relatively shallow, and the force acts on the broken point of the fracture during the reset, and the broken bone at this place has low strength and brittleness after being subjected to violence. Larger, easy to cause secondary injury when resetting

Method used

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  • Intramedullary repositor for long bone fracture of limbs
  • Intramedullary repositor for long bone fracture of limbs
  • Intramedullary repositor for long bone fracture of limbs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 and figure 2 As shown, a specific embodiment of the intramedullary reducer for limb long bone fractures of the present disclosure includes a guide hose 1 , a guide wire 3 , a driving mechanism 5 and a wire feeding mechanism 6 .

[0045] The guide hose 1 can be inserted into the medullary cavity of the long bone, and the capsule body 2 capable of guiding the forward direction of the guide hose 1 is fixed at the front end of the guide hose 1 . The capsule body 2 is the prior art. The existing capsule body 2 includes a drive component, which is the core component of the capsule body 2 and is generally integrated in the capsule body 2. The existing drive methods mainly include: motor drive, electromagnetic Drive mode, compression spring 514 drive mode, etc., the capsule body 2 is connected to the control unit outside the body, through the processing of the extracorporeal processing unit, the driving components are controlled, the rotation of the capsule i...

Embodiment 2

[0053] According to a specific embodiment of the disclosed intramedullary reducer for long bone fractures of limbs, as figure 1 and image 3 As shown, the driving mechanism 5 is fixed on the guide hose 1 and can walk in the medullary cavity. The length of the guide hose 1 in front of the driving mechanism 5 is 10-50 mm. This length satisfies that the doctor can put the driving mechanism 5 directly into the medullary cavity at the beginning; and at the position where the broken bone is stubbled, when the front-end guide hose 1 turns to enter the contralateral bone medullary cavity, the driving mechanism 5 can stay behind In the medullary cavity of the broken bone, the driving mechanism 5 is supported through the medullary cavity.

[0054] Specifically, the driving mechanism 5 is fixed on the guide hose 1 and enters the medullary cavity along with the guide hose 1 . The driving mechanism 5 includes at least one inner tube 511 , and each inner tube 511 is provided with two moun...

Embodiment 3

[0061] According to a specific embodiment of the disclosed intramedullary reducer for long bone fractures of limbs, as figure 2 As shown, the driving mechanism 5 is arranged outside the body, including a gear row, an outer hard guide sleeve 521 , a driving motor 2 and a driving gear 522 .

[0062] The teeth are arranged on the outer wall of the guide hose 1 , and there are a plurality of annular teeth arranged at equal intervals along the axial direction of the guide hose 1 . The outer hard guide sleeve 521 is a hard guide sleeve, and the sliding sleeve is arranged outside the guide hose 1 and placed outside the medullary cavity. The second driving motor is fixed on the outer hard guide sleeve 521 through the motor seat. The drive gear 522 is assembled on the motor shaft of the drive motor 2, and is rotatably located in the outer hard guide sleeve 521 and meshes with the teeth on the gear row to realize transmission. The driving motor 2 starts, and the driving motor 2 rotat...

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Abstract

The invention discloses an intramedullary repositor for long bone fracture of limbs. The intramedullary repositor comprises a guide hose, a guide wire, a driving mechanism and a wire feeding mechanism, wherein the guide hose can extend into a medullary cavity of a long bone shaft, and a capsule body capable of guiding the advancing direction of the guide hose is fixed at the front end of the guide hose; the guide wire penetrates into the guide hose, and the front end of the guide wire extends out of the guide hose and is fixed with a blunt end propped against the guide hose; the driving mechanism is used for driving the guide hose to move forwards, and the distance between the driving mechanism and the front end of the guide hose is at least 10mm; and the wire feeding mechanism is arranged outside the long bone shaft and used for driving the guide wire to move forwards.

Description

technical field [0001] The invention relates to the field of orthopedic medical devices, in particular to an intramedullary resetter for long bone fractures in limbs. Background technique [0002] In orthopedic treatment, long bone fractures of extremities are common clinical injuries. There are two main surgical options for treating long bone fractures of extremities: open reduction and internal fixation and closed reduction and internal fixation. [0003] Closed reduction and internal fixation surgery has become the mainstream for the treatment of backbone fractures due to its small trauma, less blood loss, hematoma containing factors that promote fracture healing around the fracture can be preserved, and the incidence of complications such as postoperative infection and fracture nonunion is relatively low technology. [0004] However, at present, in the closed reduction operation process, there is no special equipment for the reduction of fractures with lateral displacem...

Claims

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Application Information

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IPC IPC(8): A61B17/72A61B17/92
CPCA61B17/72A61B17/921
Inventor 李尧王忠正张奇侯志勇陈伟张英泽
Owner THE THIRD HOSPITAL OF HEBEI MEDICAL UNIV
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