Bone bolt internal fixator for separation of symphysis pubis

Abstract

The invention relates to a bone bolt internal fixator for separation of symphysis pubis, and belongs to the technical field of medical apparatuses. The internal fixator is composed of a bone bolt self-tapping screw, an outer sleeve, a pressurizing nut, a spring gasket and a retaining ring, wherein a self-tapping head is arranged at one end of the bone bolt self-tapping screw, and a bone bolt needle handle and a bone bolt screw thread are arranged at the other end of the bone bolt self-tapping screw; the pressurizing nut, the spring gasket and the retaining ring are arranged on the bone bolt self-tapping screw; an anti-receding claw and an elastic opening are arranged at one end of the outer sleeve; and a sleeve screw thread is arranged on the outer sleeve. According to the bone bolt internal fixator provided by the invention, on the basis of coordination of the self-tapping head with the anti-receding claw and with the elastic opening, symphysis pubis is completely locked in an early fixation period, and slipping is prevented by virtue of the anti-receding claw and the elastic opening, so that physiological activities of taking the symphysis pubis as amphiarthrodial joints are permitted by a patient, and problems of an existing hollow screw which is infirm to fix and which can become broken and can escape are improved. The bone bolt internal fixator provided by the invention has the advantages of being simple in structure, convenient to install, small in surgical incision, firm to fix, good in clinical effect, less in complication and the like, and the bone bolt internal fixator can only cause a minimally invasive small incision and can prevent incision at opposite side.

Description

technical field [0001] The invention relates to an internal fixator for pubic symphysis separation bone plug, which belongs to the technical field of medical instruments. Background technique [0002] In the trauma orthopedics department of the hospital, fracture patients are the most common, and the fracture sites of fracture patients are also various. One of the fractures is a pelvic fracture. Due to the complex structure of the human pelvis, the surrounding important blood vessels and nerves, the course of the external iliac vein and the obturator nerve, and the difficulty of revealing the fracture after a pelvic fracture, the treatment of pelvic fractures has always been a difficult point in trauma orthopedics. , orthopedics for the treatment of pubic separation, the early non-surgical treatment, such as traction, pelvic girdle external fixation and other methods, these methods often lead to nonunion, malunion and chronic pain and other complications. In order to solve ...

AI Technical Summary

Problems solved by technology

One of the fractures is pelvic fracture. Due to the complex structure of the human pelvis, the surrounding important blood vessels and nerves, the course of the external iliac vein and the obturator nerve, and the difficulty of revealing the fracture after a pelvic fracture, the treatment of pelvic fractures has always been a difficult point in trauma orthopedics. In the treatment of pubic separation in orthopedics, non-surgical treatment was mostly used in the early stage, such as traction, pelvic girdle external fixation and other methods. These methods often lead to nonunion, malunion and chronic pain and other complications

In order to solve the complications caused by non-surgical treatment, in recent years, pubic symphysis separation has been treated with internal fixation with compression screws. Due to the unreasonable structure of the compression screws used for internal fixation, the existing compression screws are not suitable for surgery. Broken nails, loose fixation, and screw slippage often occur after treatment, resulting in the separation of the pubic symphysis again, resulting in failure of the operation

In order to avoid the risk of internal fixation with compression screws, there is also surgical treatment using internal fixation with plates, but this method has a large surgical incision, a large amount of blood loss, a large amount of damage to the pubic bone, a high degree of surgical risk, and many complications

Another method is to use an external fixator. Although this method is less risky, it affects the normal life of the patient, the treatment effect is not accurate, and the screw tract is prone to infection, which may easily lead to surgical failure.

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