Double-plane vertical fixed point staggered distance-acetabulum anterior column screw minimally invasive positioning and guiding device

Abstract

The invention relates to a double-plane vertical fixed-point staggered-acetabulum anterior column screw minimally invasive positioning and guiding device. The device comprises a supporting rod with anL-shaped structure, a sliding block and a fixed base, wherein a chute is formed in the supporting rod; the head end of the supporting rod is movably connected with the sliding block; two or more positioning components are arranged on the sliding block; each positioning component comprises a detachable hollow positioning rod and a threaded guide pin; the threaded guide pins are installed in the hollow positioning rods; the tail end of the supporting rod is connected with the fixed base; a sleeve and a double-plane positioning frame are movably arranged on the fixed base; the double-plane positioning frame is located above the sleeve and comprises a support; the support is provided with a transverse panel and a longitudinal panel which are perpendicular to each other; the transverse panel is provided with a directional hole corresponding to the threaded guide pin; and the sleeve is internally provided with a guide hole serving as an active channel of an open device. The device of the invention has a simple structure, is convenient to use, is safe and reliable, is accurate in positioning, fully guarantees the safety and accuracy of screw fixation, and is capable of succeeding in screw fixation at a time.

Description

technical field [0001] The invention belongs to the field of orthopedic surgery equipment, and relates to a minimally invasive positioning and guiding device for acetabular anterior column screws, in particular to a minimally invasive positioning and guiding device for acetabular anterior column screws with double-plane vertical fixed point offset. Background technique [0002] With the continuous development of the economy and the improvement of people's living standards, people have put forward higher requirements for their own health problems, among which fractures are the most common and one of the main threats to our health; especially in recent years, due to traffic accidents The cases of acetabular fractures caused by factors such as acetabular fractures are on the rise, the complexity and difficulty of surgery are also increasing, and the risk of surgery is also significantly increased. [0003] The anterior acetabular column is composed of the iliac crest, iliac spi...

AI Technical Summary

Problems solved by technology

But its disadvantages are: the anatomy of the iliac fossa and groin is complex, there are many important structures, the surgical invasion is large, the surgical incision is long, the trauma is large, the bleeding is high, the femoral vessels, coronary vessels of death, anterolateral femoral cutaneous nerve injury, infection, etc. are high risk

But its disadvantages are that it only relies on the surgeon's hand feeling and the repeated fluoroscopy monitoring of the C-arm X-ray machine to operate. There are no preset positioning points and reliable support points, and there is also a lack of precise positioning and easy-to-operate guiding devices to guide the guide needle. The direction of the drilled guide pin or screw is easy to break when encountering resistance in the screw channel, and the guide pin or screw is easy to deviate from the channel, which is easy to damage the blood vessels and nerves of the pubic medullary cavity, femoral nerve, femoral artery and vein, spermatic cord, obturator Foramen arteriovenous and pelvic viscera, may even cause hip cartilage damage, even life-threatening

[0006] In short, the insertion of the screw lacks objective standards in terms of the determination of the screw entry point, the direction of travel, and the length of the screw, and it is impossible to succeed at the first time, so it is extremely difficult and challenging technically.

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