Novel bone lengthening device adopting belt pulley

An extension device and pulley technology, applied in medical science, surgery, etc., can solve the problems of inability to control the extension length at all times, increase callus formation time, poor reliability and controllability, etc., so as to facilitate the problem of excessive extension and shorten the treatment time. , the effect of strong applicability

Active Publication Date: 2019-01-29
盐城市湛安智感科技有限公司
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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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  • Novel bone lengthening device adopting belt pulley
  • Novel bone lengthening device adopting belt pulley
  • Novel bone lengthening device adopting belt pulley

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Experimental program
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Effect test

specific Embodiment approach 1

[0015] Specific implementation mode one: as Figure 1~Figure 6 As shown, the present invention discloses a novel belt pulley bone extension device, comprising a fixed bone joint part 1, a movable bone joint part 3, a fixed bone joint part 2 4, a lead screw 5, a pulley drive box 6, a hand-held rotary rod 7 and Two guide rods 1, the two guide rods 1 are arranged side by side and are fixedly installed between the fixed osseointegration part 1 and the fixed osseointegration part 2 4, and the movable osseointegration part 3 is slidably installed on the two guide rods 1 Above, the lead screw 5 is arranged axially between the two guide rods 1, and one end of the lead screw 5 is inserted into the preset shaft hole at the connecting end of the fixed osseointegration part-2 through a thrust ball bearing 5-1. The movable osseointegration part 3 is provided with a screw hole matched with the lead screw 5 and threadedly connected with the lead screw 5. The shape of the connection end of th...

specific Embodiment approach 2

[0016] Specific implementation mode two: as figure 2 , 5 As shown in . The flanges 6-1 can be locked by a locking device.

specific Embodiment approach 3

[0017] Specific implementation mode three: as Figure 5 , 6 As shown, this embodiment is a further description of the second specific embodiment. The locking device includes a positioning pin 9 and a locking pressure piece 10. Jack 8-1, the outer surface of the flange 6-1 is provided with a plurality of positioning blind holes in one-to-one correspondence with the plurality of positioning jacks 8-1, and the positioning pin 9 is slidably inserted into the flange 6-1 In the pin through hole set at the edge position, one end of the positioning pin 9 is reversely bent to have a plug joint, and any positioning socket 8-1 can be inserted and positioned with the positioning blind hole corresponding to the flange 6-1, The locking pressing piece 10 is installed on the flange 6-1 through locking screws and can compress the positioning pin 9.

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Abstract

The invention provides a novel bone lengthening device adopting a belt pulley, and relates to a medical apparatus for the orthopedics department. Two guide rods are fixed between a fixed bone connector I and a fixed bone connector II, a movable bone connector slides on the two guide rods, one end of a lead screw is inserted in an axial hole of the connecting end of the fixed bone connector I through a thrust ball bearing, the movable bone connector is in threaded connection with the lead screw, the connecting rod of the fixed bone connector II is rectangular-groove-shaped and is provided witha shaft sleeve in a communicating manner along the axial direction, the other end of the lead screw rotatably extends into the fixed bone connector II through the shaft sleeve, the bottom end of a belt pulley drive box is arranged to be open and is fixed to the groove opening of the fixed bone connector II, a flange plate is fixed to the top end of the belt pulley drive box, a hand-holding rotating rod is rotatably mounted in a center hole of the flange plate, an upper transmission wheel is fixed to the inner end of the hand-holding rotating rod, a lower transmission wheel is fixed to the other end of the lead screw, and a transmission belt sleeves between the lower transmission wheel and the upper transmission wheel. The traction lengthening for the skeleton can be carried out at any time, the treatment time is shortened, and the pain of patients is alleviated.

Description

technical field [0001] The invention relates to an orthopedic medical device, in particular to a novel pulley bone extension device. Background technique [0002] Bone lengthening is currently an effective method to treat limb shortening deformity and restore or improve limb function. Among them, callus extension of metaphysis of long tubular bone is a common osteotomy extension method with large extension length, fast bone healing, less injury, relatively few complications, and simple operation. It means that the periosteum is reserved behind the metaphyseal bone, and the mesenchymal cells in the periosteum with strong osteogenic ability will heal the bone through the formation of callus. At this time, a slow and continuous traction force is applied through the bone extension device, which can make the The callus formed at the osteotomy is slowly extended to achieve the purpose of bone lengthening. [0003] The current bone extension devices generally use external fixatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/56
CPCA61B17/56A61B2017/564
Inventor 刘济源刘学广周日同周求湛刘萍萍王俊
Owner 盐城市湛安智感科技有限公司
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