ABSTRACT
Objective To investigate the clinical effectiveness of dynamic hip screw (DHS) internal fixation and proximal femoral nail (PFN) internal fixation for intertrochanteric femoral fractures.Methods One hundred and sixty-five patients with intertrochanteric femoral fractures were randomly divided into 2 groups,85 patients were in DHS group and 80 patients were in PFN group.The clinical effectiveness,index in operative procedure and complications were compared between two groups.Results The fine rate of DHS group and PFN group was 75.3％(64/85 ) and 83.8％( 67/80 ) (P ＞ 0.05 ).The indexes of function recover time,fracture healing time,amount of bleeding in operation,operation time in PFN group were significant lower than those in DHS group [(54.3 ± 11.7 ) d vs.(92.6 ± 10.5 ) d,(63.8 ± 12.2) d vs.(71.3 ± 10.6) d,(453.3 ± 50.7) ml vs.(627.5 ± 46.8) ml,(77.9 ± 25.2) min vs.( 115.7 ± 32.8) min](P＜0.05 ).The rate of short-term complications was 16.2％ (13/80) in PFN group,and 12.9 ％ ( 11/85 ) in DHS group(P ＞ 0.05 ).The rate of long-term complications was 1.2％( 1/80 ) in PEN group and 4.7％(4/85 ) in plts group (P ＜ 0.05).Conclusions As the treatment of intertrochanteric femoral fractures,PFN internal fixation has less bleeding and better efficacy,and can improve function recovery.PFN internal fixation is a better method for unstable femoral fracture.
ABSTRACT
Objective To study early changes in biochemical markers of bone turnover for prodicting the bone mineral density(BMD) response to alendronate therapy in Chinese men with osteoporosis. Methods Seventy-eight men aged 60 to 82 years with osteoporosis [mean age (69.8 ±11.8) years]were treated with alendronate sodium 70 mg/week for 12 months. Serum bone gla-protein (BGP) and serum pyridinoline-eross-linked earboxyterminal telopeptide of type I collagen (ICTP) level were measured by chemiluminescence (equipment is Roche E170). Serum BGP, ICTP and BSALP levels were measured before and 3 months and 12 months after treatment. BMD in lumbar spine and femoral neck were measured with dual energy X-ray absorptiometry (GE PRODIGY Inc. ) at L1-4 and at the left hip(total hip,trochanter,Ward's area and femoral neck)before and 12 months after treatment. Results After 3-months and 12-months treatment, the percent reductions of serum ICTP levels were 45.8% and 51.6%, serum BGP level 32.0% and 37.5%, serum BSALP level 35. 3% and 39.9% ,respectively. After 12-months treatment, the percent increase of lumbar BMD was 11.8%, femoral neck BMD 11.4 %. The percent reductions of serum ICTP level at months 3 and 12 after treatment were positively correlated to the percent increase of lumbar BMD (r=0.28, 0.295,P <0.05 and P<0.01)and of fermoral neck BMD at 12 months after treatment(r=0.262, 0.333, P＜0.05 and P<0.01)respectively. The percent reductions of serum BGP level at months 3 and 12 after treatment were positively correlated to the percent increase of lumbar BMD (r=0. 322, 0.401,all P<0.01) and of fermoral neck BMD at 12 months after treatment (r=0.277,0.284, all P＜0.05)respectively. The percent reductions of serum BSALP level at months 3 and 12 after treatment were positively correlated to the percent increase of lumbar BMD (r=0.133,0.231,all P＜0.05) and of fermoral neck BMD at 12 months after treatment(r=0.248, 0.317, all P＜0.01)respectively.Conclusions Early changes in biochemical markers of bone turnover rates can predict BMD response to alendronate in Chinese men with osteoporosis.
ABSTRACT
A polymer film of vitamin B1 was obtained at a graphite carbon electrode by cyclic voltammetric method in phosphate buffer solution (PBS). Cyclic voltammograms of the film electrode in PBS (pH 5) exhibited one pair redox waves, Epa=350 mV，Epc=325 mV，different from monomer vitamin B1. The peak currents of poly-VB1 films was proportional to (scan rate)1/2, which showed that the charge transfer was controlled by diffusion in the polymer film. The Poly-VB1 modified electrode showed a good catalytic ability to dopamine and epinephrine. At the modified electrod, the peak potential for oxidation of dopamine occurred at 250 mV and 200 mV for epinephrine, while they were shifted towards the negative direction 100 mV and 300 mV respectively at the bare glassy carbon electrode . And their peak current had a linear relationship to the concentrations in the range of 8.0×10-7～1.0×10-4 mol/L for dopamine and 1.0×10-6～1.0×10-4 mol/L for epinephrine.