Objective To study the curative efficacy of arthroscopic debridement in the management of osteoarthritis of the knee. Methods A retrospective analysis was made on clinical records of 44 cases of knee osteoarthritis (62 knee joints) treated with arthroscopic debridement. Results All the patients were followed for 2~2.5 years. The rates of excellent or good results were 85.5% (53/62) at 6 months after the surgery, 77.4% (48/62) at 1 year after the surgery, and 66.1% (41/62) at 2 years, respectively. The curative results were significantly worse at 2 years after the surgery than at 6 months ( ? 2=6.332, P =0.012). Conclusions Arthroscopic debridement is effective for the relief of painful and swollen knee joint, and postpones the appearance of articular cartilage degeneration. The efficacy of the treatment is apparent in mild cases, but the treatment will be less effective as time goes on.

Objective To investigate the dyslipidemia in patients with psoriasis,and the characteristics of the serum lipids in pa-tients with different types of psoriasis.Methods 332 psoriatic patients were devided into pustular psoriatic,psoriasis vulgaris and erythrodermic psoriasis based on clinical manifestations.Serum lipids of the three groups were analyzed including TC,TG,HDL-C, LDL-C,ApoA1,ApoB and Lp(a).Results The serum concentrations of TC,HDL-C,ApoA1 in patients with psoriasis were signifi-cantly lower than those in control group(P <0.05),while the concentration of Lp(a)was significantly higher in psoriasis patients compared with those in control group(P <0.05).The serum level of TC,HDL-C,LDL-C and ApoA1 in pustular psoriasis group were significantly lower than those in the other two groups(P <0.05).Conclusion The patients with psoriasis have dyslipidemia, and the serious disorder situation could be associated with psoriasis types.

Objective　To explore the role of acute infection of Chlamydia pneumoniae (Cpn) in respiratory diseases. Methods　Microimmunofluorescence test was used to detect IgG antibodies for Cpn in serum obtained from 93 inpatients and PCR was used to test Cpn in detection of Cpn DNA in throat specimens from 55 of the 99 patients. Results　Acute Cpn infection was diagnosed in 35.5% of the respiratory diseases. Antibodies for Cpn (titer of ≥512) were present in 47.6% of the pneumonia group, which may suggest that during 1998 to 1999, Cpn caused an epidemic in Beijing. They were also present in 50% of asthma group, 50.0% of pulmonary heart disease group and 26.3% of lung cancer group. Only five patients (9.1%) were positive by PCR. There exists discrepancy between serological and PCR results. Conclusion　Detection of IgG antibodies for Cpn conduces to diagnosis of acute Cpn infection and give advice for appropriate therapy.

The failure of using general intramedullary nail or compression plating to treat femoral shaft fracture often causes delayed union or nonunion. Since 1995, we have treated 15 patients with delayed union and nonunion of femoral shaft fracture with interlocked Grosse-Kempf nail. Good results have been obtained.