Method for fixing metaphysic bone defect by adopting thin-needle semi-ring external fixing frame and VSD (Vacuum Sealing Drainage) lavage

Abstract

The invention discloses a method for fixing a metaphysic bone defect by adopting a thin-needle semi-ring external fixing frame and VSD (Vacuum Sealing Drainage) lavage. The method for fixing the metaphysic bone defect by adopting the thin-needle semi-ring external fixing frame and the VSD lavage is characterized by comprising the thin-needle semi-ring external fixing frame and the VSD lavage, wherein the thin-needle semi-ring external fixing frame is composed of a semi-bent bow, a universal joint, an adjuster, a connecting rod, a steel needle fixing clamp and a steel needle and the VSD lavage is composed of a negative-pressure airtight auxiliary material, a semi-permeable wound surface sealing film, a negative-pressure attracting device and a medical infusion apparatus. According to the method for fixing the metaphysic bone defect by adopting the thin-needle semi-ring external fixing frame and the VSD lavage provided by the invention, the infection and osteomyelitis can be effectively prevented and treated and the delayed union and disconnection of bone are avoided.

Description

technical field [0001] The invention belongs to the field of orthopedic treatment, and in particular relates to a method for using a fine-needle half-ring external fixator and VSD lavage to fix metaphyseal bone defects. Background technique [0002] The rapid development of industry, construction, transportation and economy has led to a significant increase in the incidence of severe trauma. Among multiple critical injuries, about 80% are accompanied by obvious bone and joint injuries, and periarticular fractures account for 60-80% of limb fractures. About 15 million people occur every year in the country. Due to its special anatomical structure and corresponding functional requirements, it has become a key and difficult point in fracture treatment. Improper treatment has a high disability rate, and skin necrosis, bone exposure, wound infection, and fractures are prone to occur. Delayed union, nonunion, chronic osteomyelitis, and even amputation. Especially for open fractur...

AI Technical Summary

Problems solved by technology

Traditional gypsum external fixation and bone traction are not conducive to dressing change of the wound, easily cause displacement of the fracture end, and are not conducive to fracture healing. Long-term plaster external fixation is likely to cause joint stiffness. Internal fixation with plates must be extensively stripped of the fracture end. The periosteum destroys the nutrient arterioles at the fracture end, affecting fracture healing. In addition, the internal fixation of the steel plate also occupies a certain amount of tissue space. Foreign body stimulation is not conducive to the resolution of inflammation, and sometimes even skin flap necrosis occurs, and even aggravates local infection.

The fixation effect of steel pin cross internal fixation is not good, it must be combined with external fixation to meet the requirements of fixation

Intramedullary nail fixation also has great limitations. Gustilo type III open fractures that are heavily polluted or have been injured for a long time may suffer from serious infection when using intramedullary nails, and there is tissue necrosis in the internal fixation of primary closed wounds. And the risk of high infection rate and nonunion rate, delayed internal fixation also has: 1. Tissue swelling and hardening in the late stage of fracture, which makes it difficult to expose and reduce fracture during surgery

2. Delay time, the patient's condition deteriorates, and once complications occur, the timing of internal fixation is often lost

3. It is not conducive to comprehensive high-quality nursing care, early activities, prevention of complications and recovery of limb function after early fracture fixation

Traditional bone grafting to treat open infected bone defects needs to wait for 6 months or more after the wound heals well, which can reduce secondary infection. It has been widely accepted by orthopedic surgeons, but it has the following defects: 1. The treatment period is long; 2. 1. The long preoperative wait brings certain difficulties to the second-stage operation. The formation of wound scars will make the final choice of tissue flaps and blood vessels very limited, and due to the lack of plasticity of the epidermis, the skin in the bone graft area will be damaged. 3. The long fixation time of the fracture leads to poor functional recovery of adjacent joints, which increases the patient's pain and financial burden, and is prone to limb deformity and contracture problems.

Clinically, iodine and iodophor need to be deiodized after use. Iodine is highly irritating and is only used for skin disinfection

5% povidone-iodine will cause obvious damage and toxicity to epithelial and other tissues, and iodine preparations in contact with subcutaneous tissue for a long time can produce iodine poisoning, causing bradycardia, hypotension, metabolic acidosis, renal failure, hypoxia, etc. Calcemia, thyroid insufficiency, etc., life-threatening in severe cases

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