Separated intramedullary pin

Abstract

The present invention relates to a separated intramedullary nail device which comprises a first jointing component and a second jointing component jointed with the first jointing component, wherein the first jointing component is hollow and is provided with a first jointing end with external screw thread. The inner side of the first jointing component is provided with a blocking part which is used for the entering of hollow-bolt-shaped connecting bolt and blocking the head part of connecting bolt. The second jointing component has a hollow long shaft shape. One neck at one end is used for the enclosing of the first jointing component. The other end is a second jointing end with an external screw thread shape for screwing the second jointing component. Namely the second jointing end enters the side of medullary cavity connected with broken bone. An internal screw thread is provided in the neck for the extending of connecting bolt from the first jointing component, and therefore the connecting bolt is screwed with the internal screw thread for driving the jointing of the first jointing component to the other side of broken bone. The relative distance between the first jointing component and the second jointing component can be simultaneously adjusted. The contact inosculation adjustment between the two sides of broken bone according to different length of bone is guaranteed.

Description

technical field [0001] The invention relates to an appliance suitable for orthopedic medical treatment, especially an intramedullary nail that is installed in the marrow cavity of long bones such as femur or implanted by minimally invasive surgery. Background technique [0002] According to bone fracture accidents, especially in the long bones of the lower limbs, intramedullary nails are usually used to connect the broken bones. Therefore, intramedullary nails generally refer to long steel nails placed in the bone marrow cavity. For example, the femur and tibia of the lower limbs are like hollow water pipes. After the intramedullary nail is placed, a wound is opened at one end of the bone and the intramedullary nail is inserted. Then, fixation nails are added to the proximal and distal ends of the intramedullary nail as appropriate. , can prevent the rotation and shortening of the bone. [0003] Generally, the traditional intramedullary nail system is in the shape of a holl...

AI Technical Summary

Problems solved by technology

However, this kind of intramedullary nail structure that locks the bolts from the outside (it can be said to be the role of the fixation nail) often causes the fixation nails such as bolts to be exposed, and it is felt that there is friction and interference in the movement and causes pain; in addition, it is very uncomfortable to lock the bolts from the outside. It is easy to align the bolts with the screw holes, so the operation is time-consuming and difficult to connect accurately

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