Forty-four patients suffering from hip pain after the hip and femoral head replacement were treated by revision for total hip arthroplasty in Spinal and Joint Surgery of Gaozhou People’s Hospital between August 2000 and August 2006. Forty-one patients were followed up. The surgeon, an associate chief physician, had been engaging in artificial joint field for 9 years, and performed artificial joint replacement for 620 patients. ①There were 26 patients with pain after artificial femoral head replacement, including 17 males and 9 females with an average age of 72.3 years (range, 67-79 years). Of the 26 patients, 12 had loosening of prosthesis stem, 8 acetabular wear, 3 dislocation of artificial femoral head, 2 ossification around the joints, and 1 periprosthetic fracture. ②Fifteen patients suffered with pain after total hip replacement, including 9 males and 6 females with an average age of 73.4 years (range, 66-80). Of them, there were 6 with loosening of prosthesis, 2 with loosening of acetabular prosthesis, 2 with wear of acetabular prosthesis, 2 with dislocation of artificial femoral head, 1 with infection of incision, 1 with delayed infection, and 1 with periprosthetic fracture. ③During follow up, 4 cases developed bone cement response symptoms such as acute hypotension, hypoxemia, and arrhythmia, but no rejection induced by artificial joint was found. X-ray films showed that no metal corrosion or acetabular polyethylene prosthesis degradation occurred. ④White blood count was generally elevated the day after revision of total hip arthroplasty, and mostly recovered 7 days after revision. Three patients had venous thrombosis of lower extremities. All 41 patients were followed up for 1-7 years, and odynolysis rate was 90.2%. The results indicate that the complications such as loosening of prosthesis, acetabular wear, dislocation of artificial femoral head, and ossification around the joints are main causes of hip pain after hip prosthesis replacement. Revision of total hip arthroplasty is an efficient method to relieve the pain.

Objective: To analyze the epidemiological and etiological characteristics of aggregation epidemics of infectious diarrhea induced by norovirus, and to provide the scientific basis for the prevention and control. Methods: A descriptive epidemiological analysis of aggregation epidemics events occurred during 2016-2018 in Longhua District of Shenzhen was carried out, with subtypes identified by real-time fluorescence quantitative PCR, Region B and Region C fragment sequence determination. Results: There were 34 aggregation epidemic events,including 448 cases, the mean attack rate was 18.26%(448/2 454). The median duration of aggregation epidemic was 3 days. The peak season appeared in autumn and winter, and the peak of epidemic emerged from December 2016 to April 2017. About 91.18% (31/34) of the epidemics occurred in schools and child care centers, and among children aged 3-6 years (78.79%, 353/448). The clinical symptoms were mainly nausea and vomiting (95.77%, 408/426) in children and adolescents but diarrhea in adult group (95.45%, 21/22). The differences between vomiting and diarrhea were both statistically significant in the two age groups (χ2=98.89，99.61，P<0.01). 29 cases were transmitted through interpersonal network, of which 21 cases were found to have unregulated treatment of vomit on campus. The detection rate of biological samples was 49.15% (203/413), all of which were G Ⅱ norovirus. The genotype was mainly GⅡ.P16-G Ⅱ.2(n=49)from November 2016 to April 2017. Conclusion Norovirus can cause large-scale outbreaks in child care centers and schools easily. Early standardized patient isolation and proper management of vomit and diarrhea are the key steps in prevention and control measures.

The Assistive Devices Program was funded and supported sufficiently, and improved the qulity of life of the disabled persons significantly (scores of SF-36). Most disabled users were satisfied with the Program. Some problems, such as inefficient way of working,undefined screening standards, lack of integrity of the assessment content, limited categories of assistive devices and home modifications,unavailable follow-up services, needed to be improved.