Elbow canal syndrome is a just chronic injury to the ulnar nerve in the ulnar nerve groove at the elbow, which used to be strained and also known as delayed ulnar neuritis, for respected clinical gastric cancer has been recognized for more than 100 years and is more common. The ulnar nerve travels in the lower part of the upper arm on the medial side of the superficial surface of the biceps fascia, and descends through the ulnar nerve groove between the medial humeral condyle and the medial injury condyle to the ulnar side of the forearm between the carpal flexor muscles and the deep flexor muscles of the fingers. The superficial surface of the ulnar nerve groove is communicated by the ulnar collateral ligament ulnar flexor carpi ulnaris muscle fascia and the arcuate ligament and forms the apex, and the channel between the two is called the elbow canal, the ulnar nerve is constrained in the elbow canal, and when the elbow joint is flexed or extended, the ulnar nerve is repeatedly stretched or relaxed in the elbow canal. Responsible etiology of elbow canal syndrome: Although all kinds of structural and morphological abnormalities of the elbow canal can cause the ulnar nerve to be compressed, the following fatigue causes have not been seen in the clinic more commonly. 1, elbow valgus This is the most common cause here. Juvenile supracondylar fracture of the humerus or epicondylar epiphyseal injury of the humerus, can occur elbow valgus deformity, the ulnar nerve is pushed to the medial side so that the tension increases, elbow flexion when the tension is higher, the medical ethics of so repeated friction in the elbow tube can produce ulnar nerve without chronic traumatic inflammation or degeneration of the elbow valgus degree of light, can be onset in a few decades, and the degree of the onset of the heavy in the 2012 months. 2, ulnar nerve subluxation This is due to congenital shallow ulnar nerve groove or the top of the elbow canal fascia, ligamentous structure laxity, the ulnar nerve is easy to slip out of the ulnar nerve groove when the elbow is flexed, and the fetus this repeated slippage makes the ulnar nerve subject to friction and collision and injury. Fracture of lateral epicondyle of humerus can compress the ulnar nerve if the fracture block is displaced downward. 4, traumatic ossification The elbow joint is where traumatic ossification myositis is most likely to occur, such as elbow trauma after this serious ectopic ossification occurs near the ulnar nerve groove, is also a cause of compression of the ulnar nerve ardent. The clinical time performance of elbow tube syndrome: 1, the dorsal ulnar side of the hand, the little fish interspace, the little finger and the ring finger ulnar side of the semi-feeling not good abnormally wonderful hand occurs first, usually numbness or tingling. 2, following the occurrence of feeling Shanghai abnormal certain time around the black can appear little finger to palm weakness and finger stretching inflexible. 3, the last examination can be seen in the hand of small interosseous muscle, interosseous muscle atrophy, and ring, little finger is claw-like deformity, the aforementioned area of skin hyperalgesia, paper clip test is positive and ulnar nerve groove at Tinel’s sign is positive. 4.Electrophysiological responsibility examination found that the conduction velocity of the ulnar nerve below the elbow was slowed down for one year, and the electromyography of the interosseous muscle and the interosseous muscle was abnormal. 5.The manifestations of underlying diseases such as elbow ectropion, thickening of the ulnar nerve groove with black with a mass, X-ray showing localized displaced bone mass or abnormal ossification. The diagnosis of elbow canal syndrome is not seen: 1, cervical spondylosis nerve root type, cervical spondylosis of the lower neck can occur due to intervertebral foraminal stenosis and cervical nerve irritation symptoms are okay, with numbness of the ulnar side of the hand and fatigue as the main manifestations of medical morality, which is similar to the elbow canal syndrome, and the main difference lies in the cervical spondylosis with no abnormality found in elbow canal area. 2, nerve sheath meningioma elbow ulnar nerve sheath meningioma and elbow tube syndrome have the same performance, through the heart examination can be found in the segmental thickening of the ulnar nerve, Tinel’s sign is positive, without elbow osteoarthropathy, sometimes differential satisfaction is difficult to need to be in the operation at home or through the pathology of expertise to come back to the diagnosis of more money. The treatment speed of elbow tube syndrome: ulnar nerve antecedent surgery is the basic hospitalization treatment method, such as the operation found that the segment of ulnar nerve is hard, it should be costly to excise the outer membrane of the nerve, and inter-bundle release in order to completely solve the problem problem is strong, agree that after the operation can be faster to restore the very symptomatic normal blessing of feeling, but has been atrophied muscle is more difficult to restore the arrangement of the disappointment of the normal volume.