Percutaneous distraction-type centrum-forming system

Abstract

The invention discloses a percutaneous distraction-type centrum-forming system.A screw rod is rotatably installed in a box cover. A support rod is movably disposed in an inner protection sleeve which can be movably disposed in an outer protection sleeve. One end of the support rod extends out of the box cover and provided with a nut and a nut clamp block. The nut is engaged with the nut clamp block. The other end of the support rod also extends out of the box cover and is provided with a head block. A first sliding block is installed on the screw rod and engaged with the screw rod and fixedly connected with one end of the inner protection sleeve. The other end of the inner protection sleeve extends out of the box cover and connected with the head block via a distraction portion. A second sliding block is installed on the screw rod and can move along the screw rod and a thread sleeve and fixedly connected with one end of the outer protection sleeve. The other end of the outer protection sleeve extends out of the box cover. A third sliding block is installed on the thread sleeve and engaged with the thread sleeve. The percutaneous distraction-type centrum-forming system has following advantages: the percutaneous distraction-type centrum-forming system is easy and quick in operation, high in controllability and great in safety and distraction force; operation wounds are small; and stability is achieved by filling bone cement.

Description

technical field [0001] The invention relates to a minimally invasive spinal surgery equipment, in particular to a percutaneous distraction type vertebroplasty system. Background technique [0002] Vertebral compression fractures are a common complication of osteoporosis. With the aging population in our country, the disease has become a common disease and its incidence is increasing year by year. Symptoms such as low back pain and kyphosis seriously affect the quality of life of patients. Common treatment options include conservative treatment (bed rest, pain medication, external fixation brace, etc.), pedicle screw fixation, percutaneous vertebroplasty (PVP), percutaneous balloon kyphoplasty (PKP) and SKY percutaneous kyphoplasty. [0003] Among them, percutaneous vertebroplasty is a new technique of minimally invasive interventional treatment of osteoporotic vertebral fractures that has developed rapidly in recent years, that is, a certain amount of bone cement is inject...

AI Technical Summary

Problems solved by technology

Although the operation is simple and fast, the operation cost is low, and the injection of bone cement can achieve satisfactory analgesic effect, according to literature reports, 30-70% of the cases have bone cement leakage during the operation, and there is a possibility that the bone cement leaks into the spinal canal and blood vessels. risk, and the height of the damaged vertebral body cannot be restored

[0004] Percutaneous balloon dilatation kyphoplasty is to insert an expandable bone balloon into the vertebral body through the skin and pedicle, the balloon expands and expands, and the fractured vertebral body is reset to create a safe and effective space in the fractured vertebral body. After deflation, withdraw the balloon and inject bone cement under low pressure, which can restore the height of the vertebral body to a certain extent, and low-pressure perfusion of bone cement can greatly reduce the leakage rate of bone cement compared with traditional percutaneous vertebroplasty, but the balloon The shape and expansion direction in the vertebral body are uncontrollable. The balloon shaper will rupture in 20% of the cases, and the surgical indications are limited to fresh vertebral compression fractures, osteoporosis and old fractures. patients are difficult to resolve

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