1.Application of finite element analysis in the biomechanical evaluation of spine structure and lumbar fusion
Chinese Journal of Tissue Engineering Research 2007;0(30):-
Finite element analysis can analyze the stress and strain change of object with complex shape,structure,constitution and load condition,and is widely applied to spinal biomechanical studies due to its controllability,reproducibility and versatility in mechanics tests.The article briefly introduced several finite element analysis software,summarized the mechanical characteristics of vertebral body,intervertebral disc,accessories and the ligament and muscle around the spine,and summarized research achievements of finite element analysis in lumbar fusion,concerning the biomechanics of Cage,its influence on lumbar fusion and related surgery choice,dynamic fusion,artificial intervertebral disc and the biomechanical variation of different fusion style after spinal tumor vertebrectomy.Finite element analysis can help understand the spine biomechanics and provide biomechanical reference for lumbar fusion choice.
2.Safety of non-ionic contrast media during renal artery stenting
Jun NI ; Weifeng SHEN ; Ruiyan ZHANG
Journal of Interventional Radiology 1994;0(02):-
50%) underwent renal artery stent implantation and percutanous coronary intervention, only 10 of them with merely renoarterial stenosis undergone renal artery stent implantation. The successful rates of the procedure and complication together with the volumes of contrast media were recorded respectively. And the serum creatitine before and 12 hours after the successful procedure were also measured. Results Both rates of procedural success and complication were similar among the three groups. The serum creatitine levels, 12 hours after the procedure, showed no difference in comparing with the baseline. Conclusion Non-ionic contrast media (Iopamiro 370) could be safely used in patients with RAS.
3.The meta-analysis of Laurance-Moon-Bardet-Biedl syndrome.
Yihua YANG ; Weifeng NI ; Shenren CHEN
Chinese Journal of Practical Internal Medicine 2000;0(12):-
Objective To deepen the clinicians' impression on the Laurance-Moon-Bardet-Biedl syndrome(LMBBS),we made a summary in the incidence and clinical manifestations of the disease in China comparing with foreigners.Methods We made evidence-based meta-analysis about the 2 cases reports in 1987 and 2003 in our hospital and literature review of 462 cases in foreign countries and 94 cases in China.Results LMBBS patients,with more frequency of consanguinity and family history,retinal dystrophy,mental retardation,obesity,polydactyly,hypogenitalism,often had many complicated and variable clinical manifestations.Conclusion To avoid intrafamiliy marriage would reduce the incidence rate.The diagnostic criteria and ascertainment methods introduced recently do benefit the early diagnosis in their childhood period.
4.Efficacy and safety of renal artery intervention in patients with abnormal serum creatitine
Jun NI ; Weifeng SHEN ; Ruiyan ZHANG
Chinese Journal of Interventional Cardiology 2003;0(06):-
0.05) were of no significance between the 2 group. There was no difference in recurrent agina and improvement of blood pressure. But rates of re-admission (26.9% vs 7.3%) and comorbity of renal failure (23.1% vs 1.8%) in group Ⅰ were significantly higher than those in group Ⅱ ( P
5.Clinical utility of Firebird drug-eluting stent in the treatment of de novo native coronary artery lesions
Jun NI ; Weifeng SHEN ; Jiansheng ZHANG
Journal of Interventional Radiology 2001;0(05):-
Objective To evaluate the efficacy and safety of Firebird drug-eluting stent (DES) in the treatment of de novo native coronary artery lesions.Methods 60 patients underwent coronary artery stenting with Firebird DES (Firebird group), 52 patients with Cypher DES (Cypher group) and another 20 patents with Mustang bare stents (Mustang group). The instant and short term follow-up outcomes were compared among the three groups. Results The procedural successful rates (98.3%vs 100.0%vs 100.0%), nitrate cessation (32.1%vs 33.3%vs 29.4% ), re-admission(5.6%vs8.3%vs11.7%) and follow-up rates (88.3%vs 92.3%vs 85.0%) did not significantly differ among the three groups. As compared with Firebird group, patients in Mustang group had more MACE(17.6%vs 0), higher occurrence rates of restenosis(17.6%vs 0) and target vessel revascularization(17.6%vs 0)(P
6.Use of intravascular ultrasound to determine relationship between renal artery remodeling and renovascular hypertension
Jun NI ; Weifeng SHEN ; Ruiyan ZHANG ; Al ET
Chinese Journal of Ultrasonography 2003;0(12):-
50%) were divided into two groups,including 10 hypertensive (Group I) and 11 normotensive patients (Group II).Renal artery intravascular ultrasound was performed in all cases to obtain the ultrasound image of renal artery lesion.Renal venous blood of both stenotic and contra lateral sides was collected to measure the levels of renin and renal vein renin rate(RVRR).The results were compared respectively.Results There were no differences in the numbers of adaptive remolding (5 vs 7) and coarctation (5 vs 4) between the two groups.The cross sectional area of external elastic membrane [( 128.3 ? 29.5 )mm 2 vs ( 111.8 ? 30.4 )mm 2],the plaque area [( 94.4 ? 26.2 )mm 2 vs ( 79.6 ? 28.5 )mm 2] and the luminal stenosis ( 73.3 ? 6.7 )% vs ( 67.9% ? 11.2 )% were higher in Group I than those in Group II,but did not achieve statistical significance.The RVRR( 2.79 ? 0.57 vs 1.09 ? 0.28 ) in Group I,however,was significantly higher than that in Group II (P
7.Prognostic indicator by urinary microglobulin after renal stenting
Weifeng SHEN ; Jun NI ; Ruiyan ZHANG ; Jian HU ; Qi ZHANG ; Jingyuan XIE
Journal of Geriatric Cardiology 2005;2(3):140-142
Objective To evaluate the effect of revascularization of the renal artery on urinary microglobulin in patients with coronaryartery disease and significant renal artery stenosis (RAS). Methods Forty-four patients with coronary artery disease and severe RAS (luminal narrowing>70%) underwent percutaneous transluminal renal artery angioplasty (PTRA) and stenting, as well as percutaneous coronary intervention. The urine -microglobulin (α1-MG) and β2-Cmicroglobulin (β2-MG) at baseline and at 3 months after the procedures were measured. Procedural success rate, procedural complications, serum creatinine concentration at baseline and at 3-months were also recorded. Results At 3-months after the renal revascularization therapy, there was no significant change of urine α1-MG ompared with that of the baseline, however, the urine β2-MG decreased significantly 3-months after the treatment (237±187μg/L vs 377±173 μg/L, P<0.01). Multivariate analysis revealed that persistent elevation of urine was an independent predictor of severe events (including re-admission and renal failure) after renal revascularization therapy in patients with severe RAS (OR=3.01,95% CI 1.01-8.95, P=0.036). Conclusions In patients with coronary artery disease and severe RAS, revascularization with PTRA and stenting may improve renal tubular function, but a continuous high level of urinary microglobulins after intervention is associated with more frequent re-hospitalization and renal failure.
8.Effect of a proliferation-inducing ligand siRNA on cell cycle of colon carcinoma SW480 cells
Feng WANG ; Weifeng DING ; Jingchun WANG ; Rongrong JING ; Hongbing NI ; Hui CONG ; Yueguo WANG ; Shaoqing JU ; Huimin WANG
Chinese Journal of Microbiology and Immunology 2010;30(9):795-799
Objective To investigate the effects of a proliferation-inducing ligand(APRIL)gene silencing by small interfering RNA(siRNA)on cell cycle and proliferation of colon carcinoma SW480 cells.Methods The siRNA plasmid vector targeting APRIL gene,named as siRNA-APRIL,was transfected into SW480 cells,transfected with scrambled vector as a nontargeting control and nontransfected group as another control.APRIL mRNA and protein expression were examined by real-time PCR and Western blot,respectively.Cell proliferation activity was analyzed by cell counting kit-8(CK-8),cell cycle was detected by flow cytometry,and p21 together with p27,two important regulatory genes in cell cycle,were measured by RTPCR.Results Compared with nontargeting control and nontransfected control,APRIL expression was inhibited significantly at both mRNA and protein level by siRNA-APRIL being transfected in SW480 cells(P <0.05).Cell proliferation ability was drastically repressed after siRNA-APRIL being transfected at 48 h,72 h and 96 h(P < 0.05).After transfected 48 h,the percent of Go/G1 phase cell was significantly increased,S and G2/M phase cell were significantly decreased,the number of cell in apoptosis was increased and the expression of p21 and p27 mRNA were up-regulated(P < 0.05).There was no significant difference when compared the two control groups each other(P > 0.05).Conclusion siRNA-APRIL can effectively knockdown the expression of APRIL gene in SW480 cells,moreover,it can inhibit the cell proliferation and induce G0/G1 phase cell cycle arrest,which occurrence may involve in upregulation the mRNA expression of p21 and p27.
9.Effects of fat suction combined with bipolar radiofrequency on facial and neck rejuvenation
Lei YI ; Weifeng PAN ; Yue MAI ; Min YIN ; Shengde NI ; Shanshan WU ; Xiang LIU
Chinese Journal of Medical Aesthetics and Cosmetology 2023;29(3):205-208
Objective:To investigate the efficacy and safety of fat suction combined with bipolar radiofrequency on face and neck rejuvenation.Methods:A total of 115 patients with face and neck fat deposits and skin laxity underwent fat suction combined with bipolar radiofrequency between December 2021 and October 2022 by the same surgeon in Changsha My Like Medical Cosmetology Hospital. There were 3 men and 112 women in this research. The mean age was 36.1 years (range, 26-55 years) and the mean body mass index was 21.4 (range, 16.8-27.7 kg/cm 2). Postoperative patient satisfaction surveys were conducted and 2 independent doctors evaluated clinical effect with preoperative and postoperative photographs at 3-6 months postoperatively. Results:The mean amount of fat aspirated was 44.5 ml (range, 10-92 ml) and the mean energy delivered was 4.5 kJ (range, 2.1-8.9 ml). 88.7% of patients were satisfied with their postoperative effect (102/115 patients). 92.2% of doctors were satisfied with the postoperative effect (106/115 patients). Four out of 115 patients (3.5%) developed irregularity by fat suction.Conclusions:Fat suction combined with bipolar radiofrequency can effectively reduce the fat accumulation of facial and neck and significantly improve skin relaxation. It is an effective method to rejuvenate facial and neck.
10.Practice of a hemodialysis alliance in the context of closed-loop hospital management
Jing QIAN ; Mengjing WANG ; Chuhan LU ; Ping CHENG ; Li NI ; Wei LIU ; Bihong HUANG ; Zhibin YE ; Zhenwen YAN ; Qianqiu CHENG ; Chen YU ; Aili WANG ; Ai PENG ; Wei XU ; Chunlai LU ; Dandan CHEN ; Xiuzhi YU ; Liyan FEI ; Jun MA ; Jialan SHEN ; Junhui LI ; Ying LI ; Lingyun CHEN ; Weifeng WU ; Rongqiang YU ; Lihua XU ; Jing CHEN
Chinese Journal of Hospital Administration 2022;38(8):595-599
Closed-loop hospital management can effectivly cope with the COVID-19 pandemic. In order to ensure the continuity of treatments for hemodialysis patients under closed-loop management and minimize possible medical and infection risks, Huashan Hospital affiliated to Fudan University and 9 hospitals in Shanghai established a hemodialysis alliance in January 2021.The alliance optimized hemodialysis resources within the region through overall planning by preparing sites, materials and personnel shifts in advance, and establishing management systems and work processes to ensure that patients could be quickly and orderly diverted to other blood dialysis centers for uninterrupted high-quality hemodialysis services, in case that some hemodialysis centers in the alliance under closed-loop management.From November 2021 to April 2022, 317 of 1 459 hemodialysis patients in the alliance were diverted to other centers for treatment, accumulating 1 215 times/cases of treatments without obvious adverse reactions. The practice could provide a reference for medical institutions to quickly establish mutual support mode under major public health events.