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A bone extension device for combining extramedullary and extramedullary pulleys

A technology of internal and external integration and extension devices, which is applied in the direction of external fixators, fixers, etc., can solve the problems of inability to control the extension length, prolong the treatment time of patients, poor reliability and controllability, etc., and achieve shortened treatment time, compact structure, Applicable effect

Active Publication Date: 2020-12-18
盐城日升月恒智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the device is adjusted, the extension length cannot be constantly controlled, and the extension length has great randomness. Once the extension length is too long or too short, it will increase the callus formation time, thereby prolonging the patient's treatment time. The efficiency is low and reliable. less controllable

Method used

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  • A bone extension device for combining extramedullary and extramedullary pulleys
  • A bone extension device for combining extramedullary and extramedullary pulleys
  • A bone extension device for combining extramedullary and extramedullary pulleys

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation one: as Figure 1~Figure 6 As shown in the figure, the present invention discloses an intramedullary joint pulley bone extension device, including a fixed bone joint part 2, a movable bone joint part 3, a gear box 4, a screw 5, a fixed bone joint part 2 7, and a pulley drive box 8 And two guide rods 1, the two guide rods 1 are arranged side by side and fixedly installed between the fixed bone joint 1 2 and the gear box 4, the movable bone joint 3 is slidably installed on the two guide rods 1, The lead screw 5 is arranged between the two guide rods 1 along the length direction, the lead screw 5 is screwed with an intramedullary thread sleeve 5-1, and the intramedullary thread sleeve 5-1 corresponds to the movable bone joint 3 The connecting end of the lead screw 5 rotates through the intramedullary shaft seat 6 and is fixedly installed with a driven gear 5-2. The intramedullary shaft seat 6 is set corresponding to the gear box 4, and the fixed bon...

specific Embodiment approach 2

[0016] Specific implementation two: as image 3 , 5 , 6, this embodiment is a further description of the specific embodiment 1, the hand-held rotary rod 8-2 is located on the outer side of the flange 8-1 and is fixedly sleeved with a scale disc 8-6.

specific Embodiment approach 3

[0017] Specific implementation three: as Figure 5 , 6 As shown, this embodiment is a further description of the specific embodiment 2. A locking device is provided between the scale disc 8-6 and the flange 8-1, and the locking device includes a locking pin 14 and a locking device. Pressing sheet 15, the dial 8-6 ​​is uniformly provided with a plurality of positioning holes 13 along its circumferential direction at equal angles, and the outer surface of the flange 8-1 corresponds to the plurality of positioning holes 13 one-to-one There are a plurality of blind positioning holes, a bolt hole is installed at the edge of the outer surface of the flange 8-1, and a locking screw is installed in the adjacent position. The shape of the locking bolt 14 is n-shaped, and one end of the locking bolt 14 rotates The other end of the locking pin 14 can be inserted into any positioning jack 13 and its corresponding blind positioning hole, so that the calibration disc 8-6 and the flange 8-1...

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Abstract

The invention relates to a novel intramedullary and extramedullary combined pulley bone lengthening device, which relates to an orthopaedic medical device. The two guide rods are fixed between the fixing bone joint 1 and the gear box, a movable bone joint is slided on the two guide rods, a lead screw is screw into an intramedullary threaded sleeve, a lead screw connecting end rotates through a intramedullary shaft seat and is fixed with a driven gear, a pulley drive box is fix on that fixing bone joint part 2, a gear shaft is rotatably arranged between the gear box and the pulley drive box, agear shaft fixedly drives a gear and a lower drive wheel, a drive gear meshes with a driven gear, a hand-held rotary rod is rotated at the top end of the pulley drive box, the hand-held rotary rod isfix with an upper transmission wheel, the lower transmission wheel and the upper transmission wheel are sleeved with a transmission belt, the fixing bone joint 1, the movable bone joint part, the gearbox and the fixing bone joint part 2 are respectively equipped with a plurality of bone nails, the intramedullary thread sleeve fixation and the intramedullary shaft seat fixation. Can always carry on the skeletal stretch elongation, shortens the treatment time, and alleviates the patient's pain.

Description

technical field [0001] The present invention relates to an orthopaedic medical instrument, in particular to a pulley bone extension device combining intramedullary and intramedullary. Background technique [0002] Bone lengthening is an effective method to treat limb shortening deformity and restore or improve limb function. Among them, metaphyseal callus lengthening of long tubular bones is a common osteotomy lengthening method with long length, fast bone healing, less damage, relatively few complications, and simple and easy operation. It refers to the retention of the periosteum behind the metaphyseal bone, and the mesenchymal cells with strong osteogenic ability in the periosteum will heal the bone by forming callus. The callus formed at the osteotomy site slowly lengthens to achieve the purpose of bone lengthening. [0003] The current bone extension device generally adopts the method of skin external fixation, such as the Ilizarov external fixator and the single-arm ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/66
CPCA61B17/66
Inventor 周日同周求湛刘济源刘学广刘萍萍王俊
Owner 盐城日升月恒智能科技有限公司