SU1286194A1 - Endoprosthesis of humerus - Google Patents

Abstract

The invention relates to traumatology and orthopedics and helps prevent dislocation of the head, while maintaining the physiological volume of movement of the limb. The prosthesis consists of a head 1 with a neck 2, a metal rod, a flexible elastic element 6, a disk lock 7 with a leg 8. A parabolic hole 4 and a channel 5 are made in the head 1. The metal rod is inserted into the bone marrow canal the flexible element 6 is conducted and the leg 8 is in the form of a cable. The latch 7 tightly pressed to the shoulder blade. The leg 8 and the element 6 are guided through the hole 4 and the channel 5 and fixed with some tension, retracting the limb at an angle of 90 °. After the shoulder has been brought, element 6 is stretched, ensuring that the head 1 is firmly fixed to the articular surface of the scapula. 3 il.

Description

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The invention relates to medical technology, namely to traumatology and orthopedics.

The purpose of the invention is to prevent dislocation of the head while ensuring the physiological amount of movement of the limb.

FIG. 1 shows the endoprosthesis of the humerus, frontal projection; in fig. 2 - the same, profile projection; in fig. 3 - connection of the endoprosthesis with bones.

The proposed endoprosthesis consists of a head 1 with a neck 2 connected to a metal rod 3. In the head 1 of the endoprosthesis, a hole in the shape of a paraboloid 4 is made, connected at the top with a through channel 5 made in the neck 2. In hole 4 and in channel 5 is installed flexible elastic element 6, provided on one side with a disk lock 7 with a leg 8 in the form of a cable.

The endoprosthesis is used as follows.

After resection and removal of the proximal humerus affected by the tumor, a metal core 3 of the endoprosthesis is inserted into the bone marrow space and firmly fixed to the patient's bone.

Through the center of the articular surface of the scapula to the front of its surface an awl is made channel. Through the channel from the front surface of the blade, the flexible elastic element 6 and the leg 8 are held in such a way that the disk lock 7 fits snugly to the blade. Through the opening 4 and the channel 5, the leg 8 and the flexible elastic element 6 are held, the limb is retracted to 90 ° and with some tension the elastic element 6 is fixed to the humerus in the attachment area of the deltoid muscle (through a previously prepared transverse channel). After the shoulder has been brought, the flexible resilient element 6 is stretched and pulls on the leg 8, which provides a strong

Example. Patient S. Yu. A., 29 years old, was admitted to the clinic for a large osteoblastoclastoma of the proximal metaepiphysis of the right humerus. On admission, complained of pain in the area

 right shoulder joint, in the absence of active movements in this joint and the function of the right upper limb in general. With passive movements, the pain intensified sharply. On radiographs of the right shoulder joint and right shoulder, there was a sharp swelling and destruction of the proximal metaepiphysis of the right humerus. After the appropriate preparation, after seven days, an operation was performed - the upper third of the tumor

 5 of the right humerus, with replacement of the defect with the endoprosthesis of the proposed construction. External immobilization is not imposed.

The postoperative period was smooth2Q. The wound healed by primary tension. Stitches you in 12 days. The patient began to engage in physical therapy. After 6 weeks after surgery, the patient was already able to actively withdraw the operated limb to; 70 °. The patient was examined after 6 months.

25 after surgery. No pain. Fully serving itself. By this time, active abduction of the right upper limb has reached. Rotational movements restored.

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Claims (1)

Invention Formula A humeral endoprosthesis containing a head with a neck associated with a metal rod, characterized in that, in order to prevent head dislocation while ensuring the physiological range of movements of the limb, a through-hole having a parabolic shape in the proximal part is made in it fixation of the endoprosthesis head 1 to the joint; a flexible elastic element is installed with the blade surface diskonoi. lock pin on one end. Example. Patient S. Yu. A., 29 years old, was admitted to the clinic for a large osteoblastoclastoma of the proximal metaepiphysis of the right humerus. On admission, complained of pain in the area right shoulder joint, in the absence of active movements in this joint and the function of the right upper limb in general. With passive movements, the pain intensified sharply. On radiographs of the right shoulder joint and the right shoulder, there was a sharp swelling and destruction of the proximal metaepiphysis of the right humerus. After the appropriate preparation, after seven days, an operation was performed - the upper third of the tumor right humerus, with replacement of the defect with the endoprosthesis of the proposed design. External immobilization is not imposed. The postoperative period went smoothly. The wound healed by primary tension. Stitches you in 12 days. The patient began to engage in physical therapy. After 6 weeks after surgery, the patient was already able to actively withdraw the operated limb to; 70 °. The patient was examined after 6 months. after operation. No pain. Fully serving itself. By this time, active abduction of the right upper limb has reached. Rotational movements restored. Invention Formula A humeral endoprosthesis containing a head with a neck associated with a metal rod, characterized in that, in order to prevent head dislocation while ensuring the physiological range of movements of the limb, a through-hole having a parabolic shape in the proximal part is made in it flexible elastic element is installed with a disco flexible elastic element lock pin on one end.