Local automatic continuous administration supporting bar for femoral head necrosis

Abstract

The invention provides a local automatic continuous administration supporting bar for femoral head necrosis. The local automatic continuous administration supporting bar comprises a bar body, whereinthe bar body comprises a spherical bar head and a threaded bar tail, wherein a hollow cavity is formed in the bar body, a drug-carrying cavity is formed in the front half part of the cavity, a screw hole is formed in the spherical bar head, and a head end screw cap is arranged in the screw hole; a plurality of drug outlets are formed in the periphery of the spherical bar head, and blocking materials are arranged in the drug outlets; a nail tail blocking bolt is arranged on the inner side of the tail end of the bar body, and a compression spring fixing nut is arranged on the nail tail blockingbolt; and a drug-pushing piston is arranged at the rear end of an inner cavity of the bar body, and a compression spring is arranged on the drug-pushing piston. According to the local automatic continuous administration supporting bar, a necrotic femoral head is mechanically supported by the supporting bar, meanwhile, osteoclasia-breaking drugs are continuously released in a femoral head necrosisregion, absorption of necrotic sclerotin in the femoral head necrosis region is retarded, sufficient time is provided for repairing the femoral head, and finally, the femoral head necrosis is healed.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a local automatic and continuous drug support rod for necrosis of the femoral head. Background technique [0002] Necrosis of the femoral head is a common disease in clinical practice. If it is not treated, more than 85% of the articular surface of the femoral head will collapse, resulting in pain and disability for the patient. Eventually, joint replacement is required. Although with the advancement of joint replacement technology, artificial joints The life expectancy is greatly extended, but because most of the patients with femoral head necrosis are young and middle-aged patients, they have a lot of activities, resulting in a high long-term failure rate of joint replacement. Therefore, taking measures to protect the femoral head of femoral head necrosis before the femoral head is destroyed is the current direction of orthopedic doctors' efforts. At pres...

AI Technical Summary

Problems solved by technology

However, due to the various areas and ranges of femoral head necrosis, the femoral head support rods currently used can only partially support the femoral head. Femoral head support surgery was performed, but the rate of bone destruction was still greater than the speed of repair, and the strength of the femoral head continued to decline, which eventually led to the collapse of the femoral head and required hip replacement

Systemic application of anti-bone resorption drugs cannot reach the lesion area due to poor blood supply after femoral head ischemia

Disposable topical medication in the femoral head cannot effectively inhibit the bone destruction of the femoral head due to the short action time of the drug

In conclusion, the success rate of femoral head support rod with traditional structure is low

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