Combined stent

Abstract

The invention relates to the field of medical instruments and provides a combined stent. The combined stent comprises a bone support (1), a proximal connector (2) and a distal connector (3), and pore channels (12) are formed in the bone support (1); the proximal connector (2) is connected to the tail of the bone support (1), and pore channels (12) are formed in the proximal connector (2); the distal connector (3) is connected to the tail of the proximal connector (2), pore channels (12) are formed in the distal connector (3), and after the bone support (1), the proximal connector (2) and the distal connector (3) form the stent by connection, the pore channels (12) therein are communication with one another. The combined stent can realize treatment of avascular necrosis of the femoral head by means of combined transplantation of blood vessels.

Description

technical field [0001] The present invention relates to medical devices. More specifically, it relates to a medical combination bracket. Background technique [0002] Femoral head necrosis, also known as avascular necrosis of the femoral head, is a common and refractory disease in the field of orthopedics. It is a lesion in which the local blood supply of the femoral head is poor due to various reasons, resulting in further bone cell ischemia, necrosis, trabecular bone fracture, and femoral head collapse. If there is no effective treatment, about 80% of patients will have femoral head collapse within 1-4 years, secondary joint dysfunction, and finally patients have to accept artificial joint replacement, and the high cost of artificial joint replacement will bring patients and the society. It brings a huge economic burden, and because the artificial joint has a certain life span, young and middle-aged patients often face the problem of joint loosening after joint replaceme...

AI Technical Summary

Problems solved by technology

[0005] In addition, if the tantalum rod used for the treatment of femoral head necrosis in the past still needs artificial joint replacement due to the progress of the disease, the osteotomy cannot be performed directly due to the existence of the metal tantalum rod in the osteotomy area of ​​the femoral neck. The rod is removed; the porous tantalum rod cannot be unscrewed directly by screw rotation due to bone ingrowth

[0006] Using a trephine to drill holes to separate the bracket from the bone is one of the feasible ways, but the removal process is often extremely difficult. The trephine often cuts the bracket, resulting in a large amount of metal wear debris, which is difficult to clean; and it is easy to cause the bracket to break or local fractures ( Such as greater trochanter fractures, etc.), which increases the difficulty of surgery and leads to a decrease in the stability of the prosthesis after joint replacement, which significantly affects the surgical effect

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