Lumbar girdle occupies a relatively important position in the clinical practice of spinal surgery, for most of the spinal diseases, a major way to take conservative treatment is to support the lumbar girdle. However, in the clinical often encountered patients complaining of back pain with waist circumference useless, ask him what he brought the waist circumference, remove the thing to take a closer look, in addition to the appearance can be called a waist circumference, the inner son of the pressure root and waist circumference do not get on the side. Many doctors have limited knowledge of waist circumference, today we will talk about the matter of waist circumference. 1, what is the cause of low back pain? The cause of low back pain is very complex, complex enough to write a book, obviously this is not the focus of this article. I personally will produce the mechanism of pain is summarized in three categories: the first category of pain from the bony structure, such as spinal instability, spinal fracture, etc.; the second category of pain from the soft group, such as paraspinal muscle injuries; the third category of pain from the nerves, such as a herniated disc compression of the nerve caused by the pain. In many cases, the three categories of pain are not distinguished in detail, to a certain extent, the three will also interact with each other, each other as a cause and effect. 2, what is the mechanism of waist circumference? Above summarized the causes of low back pain, at this stage, all the conservative or surgical treatment options for low back pain are in fact centered on these three aspects. Lumbar girdle as an external similar to the existence of trauma orthopedics in the form of external fixed bracket, the main function is: (1) to protect the lumbar muscles, so that the lumbar muscles are relaxed, the human body daily standing, the lumbar back of the paraspinal muscles there is a certain amount of tension to maintain the body’s upright posture, the pain in the lumbar area will make the spine is fixed in a pain-free position, which ultimately leads to spasm of the lumbar muscles, and the spasm will, in turn, aggravate the lumbar pain, forming a vicious cycle of pain. Exacerbate low back pain, the formation of a vicious cycle, wearing a waist cuff can partially replace the role of the low back muscles to maintain the body’s posture, improve the stress on the muscles of the low back, so that the muscles can be relaxed to slow down the low back pain; (2) to limit the spine’s activities, the spine’s unstable activity is a major cause of low back pain, wearing a waist cuff to a large extent to limit the lumbar activities, activities to reduce the spinal injuries after the local repair to alleviate the pain. 3, the waist in the end there is no effect? In the end there is no effect of waist cuffs, many patients in the clinic will have questions about this issue. From the existing literature, patients with acute low back pain, wearing a waist cushion for the treatment of low back pain is still relatively certain that the effect of Calmels, Pope and others have reported on this; a history of low back pain, the use of a waist cushion for the prevention of low back pain effect has been recognized, Roelofs, Jellema and others reported in the literature has also confirmed this; but for patients with chronic low back pain, the effect of brace treatment is not clear. However, in patients with chronic low back pain, the efficacy of bracing is unclear, and the current literature does not support the use of lumbar braces in this population. Why acute and chronic low back pain brace treatment effect is not clear, personal analysis, acute low back pain and the body structure of the acute injury related to wearing a waist cuff to the acute injury to provide a relatively good healing environment, the structure of the healing of low back pain naturally relieve; and chronic low back pain, the damage structure to experience the side of the damage – side of the repair process, the process has been chronic, short-term wearing of waist cuffs do not fundamentally Solve the dynamic evolution of injury-repair process. 4.What kind of waist circumference should be used? Theoretical basis (the role of the waist cuff mechanism) and clinical practice (waist cuff has no effect) have proved that the waist cuff in the treatment of low back pain has efficacy, then why there are still a lot of patients will appear “waist cuff is not useful” illusion. In addition to the reason that no treatment can be guaranteed to be 100% effective, there is another very important reason for the incorrect choice of a waist cincher. The quality of many patients’ waist cushions is dismal. Waist cushion design many, different shapes, to speak clearly at once is more difficult, but based on the waist cushion stretch performance, roughly divided into two kinds, including stretchable waist cushion (flexible) and hard waist cushion (rigid), daily we are using the hard waist cushion, personal summary of the hard waist cushion should meet the following requirements: (1) the waist and back should be strong enough to complete the support of the waist (1) the waist and back should have enough strength to complete the lumbar support function, good waist in the waist are added with enough strength of the metal material; (2) the lumbar back support should have enough length and width, the length should be up to the lower edge of the ribs, under the iliac spine below the width should be wrapped around the entire lumbar back as appropriate; (3) good waist waist waist support should have a lumbar physiological arc of the shape; (4) the waist of the combination of the combination of the elasticity of the waist should have enough strength in the stooping (4) The elasticized part of the waist cincher should be strong enough so that the diameter of the waist cincher can not change too much when bending over, so too big or too small waist cincher is not suitable. Meet the above requirements of the waist cincher can realize the three-point support (3 points restraint principle, ribs, pelvis, abdomen in front of the three-point support) requirements to meet the waist cincher to limit the lumbar activity and relaxation of the lumbar muscle effect. 5.How to bring the waist cincher? After choosing the right waist cincher, you need to pay attention to the correct wearing. I generally require patients to get up and move when wearing a waist cincher, and lying in bed without wearing a waist cincher. It should be noted that many patients with low back pain, in order to save trouble, get up from the bed and then bring a waist cincher, this is actually not the most appropriate method. The correct method is: wear a waist cuff in bed, and then lie on the side by one side of the upper limb support to sit up. Need to emphasize the point is that, after wearing a waist cincher need to ensure that you can complete the three-point support, too short waist cincher after wearing and no effect. 6.How long is a waist cincher appropriate? There is no uniform opinion on the time of wearing waist cincher, mainly based on the specific conditions, different diseases on the waist cincher wearing requirements are different, generally recommended to wear about 3 months, the longest time is not more than 6 months. As a therapeutic measure, wearing a waist cincher for too long may result in weakening of the core muscle groups and restriction of spinal movement, so it is not recommended to use waist cincher as a long-term treatment option. What we see more often in our daily life is acute low back pain, that is, we often say “flash to the waist”, the North American Spine Society in 2005 has a clear recommendation on this, for patients with acute low back pain (time less than 6 months), the application of waist cuffs for a short period of time (1 to 3 weeks), the therapeutic effect is relatively accurate.