The finite element method （FEM） is a numerical computation method based on computer technology, and has been gradually applied in the fields of medicine and biomechanics. The finite element analysis can be used to explore the loading process and injury mechanism of human body in traffic injury. FEM is also helpful for the forensic investigation in traffic injury. This paper reviews the development of the finite element models and analysis of brain, cervical spine, chest and abdomen, pelvis, limbs at home and aboard in traffic injury in recent years.
Accidents, Traffic ; Biomechanical Phenomena ; Computer Simulation ; Finite Element Analysis ; Forensic Sciences ; Humans ; Image Processing, Computer-Assisted/methods* ; Models, Anatomic ; Models, Biological ; Pelvis ; Thorax

Objective To investigate the value of serum α1 acid glycoprotein(AAG) and Homocysteine(Hcy) in different stage of renal damage in type 2 diabetes(T2DM ) .Methods a total of 128 patients with T2DM were recruited from January 2013 to Octo‐ber 2013 ,According to 24 h urinary albumin excretion rate (UAER) were divided into the first group ,the second and third groups , and choose 80 healthy cases over the same period as the normal control group .Serum AAG ,Hcy ,creatinine (Cr) and blood urea ni‐trogen (BUN) were detected ,the test results were analyzed statistically .Results There were significant differences in type 2 diabe‐tes mellitus group ,early diabetic nephropathy group ,clinical diabetic nephropathy group of the serum AAG ,Hcy levels(P<0 .05) , there were positively correlated (r=0 .673 ,P<0 .05) between UAER and serum AAG levels ,and were positively correlated (r=0 .35 ,P<0 .05) between UAER and Hcy levels .Conclusion Combined detection of serum AAG ,Hcy have a significant for early diagnosis of diabetic nephropathy and assessing the degree of renal injury in diabetes .

Objective To investigate the serum cystatin C (CysC) and urinary albumin excretion (mALB) joint detection in di‐agnosis of early diabetic nephropathy injury .Methods 120 cases of determination of CysC and microalbuminuria in type 2 diabetic patients and 40 healthy people and related clinical and biochemical parameters were measured ,and the various factors by correlation analysis ,the determination of differences in early renal damage in diabetes and healthy people .Results the early diabetic nephropa‐thy group ,diabetic nephropathy group serum cystatin C and urinary microalbumin is higher than the normal control group ,CysC and mALB level had significant difference ,the difference was statistically significant (P<0 .05) ,the mALB was positively correla‐ted with serum CysC levels (r=0 .662 ,P<0 .05) ,and no obvious correlation of serum Cr ,BUN levels and mALB .Conclusion trace albumin serum cystatin C and urine is reflecting early renal function injury sensitive and reliable index ,serum cystatin C com‐bined detection of urine micro albumin contributes to kidney disease early diagnosis ,treatment and prognosis judgement .

Objective To introduce the operative mode of circumcision of the root skin of penis for the treatment of redundant prepuce and its efficacy. Methods The operative indications included redundant prepuce and imperfect phimosis.With the will of patients,circumcision of the root skin of penis was performed on 256 cases of redundant prepuce and imperfect phimosis (group A).One section of the root skin of penis was resected,and the wound was sewed up.The skin of penis was moved from far to nearby and the prepuce was shortened finally.Compared with group A,group B (another 265 cases with the same indications) were treated with the traditional circumcision of prepuce.The amount of bleeding during operation and postoperative complications (bleeding, hematoma, dropsy, pain, infection of wound) were compared between the 2 groups. Results Intraoperative hemorrhagic amount was (3?1)ml in group A and (10?2)ml in group B( t=-50.36,P

Objective To investigate the application and clinical significance of the medial plantar flap on repairing the medial ankle and foot soft tissue defects. Methods A total of 13 patients with the medial ankle and foot soft tissue defects were repaired by the local transferred medial plantar flap alone or in combination with sural neurovascular flap transplantation in the Yuebei People's Hospital Affiliated to the Medical College of the Shantou University from Jun. 2006 to Dec. 2012. Results All patients were followed-up of 4-21 weeks,and the average follow-up periods were 6. 3 weeks. All of the skin and soft tissue defects of the medial ankle and foot were repaired,and there were 2 cases of partial necrosis of flap were repaired after tow times skin grafting operation,and all cases without complications of wound infection or iatrogenic nerve injury. Conclusion The medial plantar flap on treating ipsilateral medial malleolus and foot skin and soft tissue defects is useful and effective with less complications,satisfactory effects,intact the ankle flexor and extensor device,allowing early functional exercise,good functional recovery.

Objective 　To evaluate the value of 99m　Tc-TRODAT-1 SPECT DAT imaging in the early diagnosing of Parkinsons disease (PD).Methods　 Eleven patients (9 PD and 2 possible PD) and eighteen healthy subjects matched by sex and age were studied with 99m　Tc-TRODAT-1 SPECT DAT imaging. Striatum specific uptake of 99mTc-TRODAT-1 was calculated according to the ratio of DAT uptake in striatum (ST) and cerebellum (CB). Results　In the hemi-Parkinsons disease group, the DAT specific uptake of 99mTc-TRODAT-1 was significantly lower (P＜0.01) in contralateral than in ipsilateral striatum to the clinically symptomatic side. There was significant decrease (p＜0.01) of striatum DAT uptake in patients with hemi-PD compared to the controls.Conclusions　99mTc-TRODAT-1 SPECT DAT imaging may help to confirm the diagnosis of PD at the early stage.

BACKGROUND:Ideal models of spinal cord injury should simulate human spinal cord injury, exclude confounding factors affecting effects, and have extensive repeatability. Spinal cord transection model is an ideal choice at present. Nevertheless, the operation is diverse, so therapeutic effects have great differences, and the research results lack of comparability. OBJECTIVE:To compare and analyze behavioral changes and pathological features of rat hindlimb after spinal cord transection by establishing standardized model of transected spinal cord in rats. METHODS:A total of 60 adult female Sprague-Dawley rats were randomly divided into sham surgery group (n=12), conventional spinal cord transection group (n=24) and microscopic spinal cord transection group (n=24). Each group was randomly assigned to 7-day, 14-day and 28-day groups according to time points after model establishment. T9 vertebrae were considered as a center. Sham surgery group underwent laminectomy. Other groups underwent spinal cord transection. Thus, models of acute spinal cord injury were induced. Models in the conventional spinal cord transection group were established by conventional surgical methods. Models in the microscopic spinal cord transection group were established by standardization micromanipulation technique. At 7, 14 and 28 days after model establishment, motor function of hindlimb was evaluated using Basso, Beattie and Bresnahan (BBB) scoring system. Histopathology of transected spinal cord was observed. The thickness of the glial scar, the longitudinal distance between the two stumps, the transverse diameter of the spinal cord cavity and cerebrospinal fluid cyst formation were measured at the transected site of the spinal cord. RESULTS AND CONCLUSION:In the sham surgery group, preoperative and postoperative BBB scores and pathology of the spinal cord did not clearly change. In the conventional spinal cord transection group and microscopic spinal cord transection group, complete paralysis of hindlimb was detected after model establishment. Hindlimb function did not recover in the conventional spinal cord transection group. At 1 to 2 weeks after model induction, spontaneous recovery of hindlimb function was visible in rats of the microscopic spinal cord transection group. Spinal pathology index value was significantly lower in the microscopic spinal cord transection group than in the conventional spinal cord transection group (P<0.01). Pathological observations were not correlated with BBB scores in each group. These data indicated that standardized spinal cord transection method helps to eliminate individual differences and to quantitatively analyze and to compare studies addressing therapeutic effects.

Objective To evaluate the therapeutic results of comprehensive interventional therapy for antiphospholipid syndrome (APS) complicated by deep vein thrombosis (DVT). Methods A total of 10 patients with APS complicated by DVT, who were encountered at authors’ hospital during the period from January 2001 to October 2013, were enrolled in this study. The patients included 3 males and 7 females with a mean age of 45 years (39-74 years). The patients were divided into pure anticoagulantion therapy (group A, n = 4) and catheter-based thrombolysis via the jugular vein combined with anticoagulantion therapy (group B, n = 6). The clinical data were retrospectively analyzed. After the treatment warfarin was orally administered in all patients for at least one year. Results There were no significant differences in general clinical characteristics between the two groups. Before the treatment, the circumference difference of the thighs was (5.55 ± 0.51) cm in group A and was (5.13 ± 0.45) cm in group B. After the treatment, the circumference difference of the thighs was (1.85 ± 0.31) cm in group A and was (0.95 ± 0.26) cm in group B. In both groups, the postoperative calf size was significantly reduced when compared with the preoperative one (both P < 0.01), which was more obvious in group B than in group A (P < 0.05). The detumescence rate in group B was significantly higher than that in group A, which was (81.7 ± 4.1)% vs (67.3 ± 3.6)%(P <0.01). The average hospitalization days of group B and group A were (13.83 ± 0.75) days and (20.75 ± 2.63) days respectively, and the difference was statistically significant (P < 0.05). In group A, clinical effective result was obtained in three patients and ineffective result in one patient, while in group B clinical cure was obtained in all patients. Conclusion In treating APS complicated by DVT, catheter-based thrombolysis via the jugular vein combined with anticoagulantion therapy is safe, effective and time-saving, while pure anticoagulation therapy has only limited efficacy.

OBJECTIVETo injvestigate the cerebral blood flow of patients with early syphilis.

METHODS(99)Tc(m)-ECD as brain perfusion imaging agent was used in single photon emission computed tomography (SPECT) for 32 patients with early syphilis and 15 controls. Visual analyses were made on every BSPECT image.

RESULTSThe 32 patients with early syphilis had general, patchy hypoperfusion of cerebral blood flow. Fourteen of the 32 patients had 48 episodes of marked patchy hypoperfusion of rCBF. The responsible areas of hypoperfusion in a patchy distribution involved the left frontal lobe (6 episodes), right frontal lobe (3), left parietal lobe (7), right parietal lobe (6), left temporal lobe (11), right temporal lobe (5), left occipital lobe (3), left basal ganglia (3), cerebellum (1), and nerve nuceus (1). No abnormality was found in the control group.

CONCLUSIONSCerebral blood flow abnormalities exist in patients with early syphilis. General patchy hypoperfusion on SPECT imaging is common.

Adult ; Brain ; diagnostic imaging ; Cerebrovascular Circulation ; physiology ; Humans ; Middle Aged ; Regional Blood Flow ; Syphilis ; diagnostic imaging ; Tomography, Emission-Computed, Single-Photon

Ohjective To evaluate the safety and efficacy of transjugular intrahepatic portosystemic shunt (TIPS) in the treatment of sinusoidal obstruction syndrome (SOS) caused by gynura segetum.Methods The clinical data of 9 patients with SOS caused by gynura segetum (5 males and 4 females) who underwent TIPS were retrospectively analyzed from February 2017 to June 2018.The Child-Pugh scores were (9.5 ± 1.3) and the MELD scores were (12.5 ± 5.0).The success rates,complications and follow-up results were evaluated.Results TIPS was performed successfully in all the 9 patients.The portal venous pressure gradient dropped from (22.4 ± 2.7) mmHg to (10.4 ± 3.2) mmHg (P ＜ 0.05).There was no complication such as abdominal hemorrhage and biliary peritonitis.Nine patients were followed-up for 1 ～17months,mean 7.8 ± 6.0 months.One month after treatment,the Child-Pugh scores were (7.1 ± 1.8),compared with that of the preoperative scores,the difference was statistically significant (P ＜ 0.05).The MELD scores were (5.3 ± 4.6),compared with that of the preoperative scores,the difference was also statistically significant (P ＜ 0.05).At the end point of the follow-up,color Doppler ultrasound and portal CTA showed that the TIPS shunt was patent and hepatic congestion was relieved in all the 9 patients.All patients were alive.Conclusion TIPS was a safe and efficacious treatment for SOS caused by gynura segetum.