Biomechanics-related degenerative lumbar spondylosis refers to the diseases of lumbar spine joints, muscles, fascia, and ligaments that related to maintaining lumbar spine mechanical balance and stability, which are mainly manifesting as lumbar pain and lumbocrural pain. The occurrence of biomechanics-related degenerative lumbar spondylosis is related to continuous static load and dynamic load, extra load, and aging. This article describes the etiology of biomechanics-related degenerative lumbar spondylosis, summarizes the functional compensation and structural compensation of losing balance by analyzing the characteristics of human biomechanical balance and the biomechanics of lumbar spondylolisthesis, and interprets the clinical classification of lumbar spondylosis, so as to provide a better reference for the diagnosis and treatment of lumbar spine diseases.
To observe the effect of pulsed electromagnetic fields (PEMFs) of different treatment time on bone mineral density of femur in ovariectomized rats, so as to find out the treatment time for the best therapeutic efficacy. Methods Fifty female SD rats were randomly divided into 5 groups: sham-ovariectomized (SHAM) group (no PEMFs treatment), ovariectomy (OVX) control group (no PEMFs treatment), OVX I, II and III groups (PEMFs treatment at 8 Hz frequency with 3. 8 ×10-10A/m intensity 20, 40, and 60 minutes daily for 30 days, respectively). All rats were given bilateral ovariectomy except those in the SHAM control group. Bone mineral density (BMD) of femur was assessed at 30 days after PEMFs treatment. Results In OVX control group, hypotrichosis, hypoactivity and l istlessness were observed after operation; and in SHAM group, OVX I group, OVX II group and OVX III group, pilus, psyche and activity were normal. The BMD values were (0.226 ± 0.011), (0.210 ± 0.011), (0.231 ± 0.013), (0.231 ± 0.017) and (0.229 ± 0.013) g/cm2 in SHAM group, OVX control group, OVX I group, OVX II group and OVX III group respectively, showing significant differences between OVX control group and other groups (P lt; 0.05), but showing no significant differences between other 4 groups (P gt; 0.05). Conclusion P EMFs of the three different treatment times can maintain the BMD in ovariectomized rats. It shows that PEMFs have the same effect of maintaining BMD with increasing of treatment time at the range of 20-60 minutes in ovariectomized rats.
Objective To analyze the injury and dysfunction as well as the rehabilitation status and demand of the 188 Lushan earthquake victims admitted in the hospitals in and around Ya’an city and the West China Hospital of Sichuan University, so as to provide guidance for the rehabilitation work in the following step. Methods By means of the onsite investigation, 122 victims admitted in 7 hospitals and 2 health centers in and around Ya’an city within 1-9 days after Lushan earthquake, and the other 66 victims treated in the West China Hospital of Sichuan University were analyzed. Results The injury categorization of 122 victims in and around Ya’an city was as follows: upper limb fracture (12.30%), lower limb fracture (42.62%), spine fracture (16.39%) (25.00% treated by surgery and 75.00% treated by non-surgery treatment), pelvis fracture (1.64%), rib fracture (4.10%), traumatic brain injury (10.66%), soft tissue contusion (8.20%), and others (4.09%). At the corresponding period, the injury categorization of 66 victims treated in the department of rehabilitation medicine of the West China Hospital of Sichuan University was as follows: fracture (77.27%), traumatic brain injury (3.03%), spinal cord injury (4.55%), and others, including soft tissue injury (15.15%). At the ninth day after earthquake, among the 122 victims in and around Ya’an city, 8 victims (6.56%) were recovered with self-care ability of daily living, and the other 144 (93.44%) still needed the strengthened rehabilitation treatment. At the corresponding period, among the 66 victims in the West China Hospital, one victim (1.52%) was recovered with self-care ability of daily living, and the other 65 (98.48%) still needed the strengthened rehabilitation treatment. Conclusion Early rehabilitation treatment such as active exercise, elevating injured limbs, physical therapy, turning over at regular time, and psychological intervention can help the earthquake victims to return to home and society early.