Objective To explore the relationship between the somatosensory evoked potential (SEP) diversification during operation and the short term outcome of ossification of posterior longitudinal ligament (OPLL) of cervical spine. Methods 70 OPLL inpatients from February 2008 to February 2011were included in this study. All patients received anterior cervical operation. According to the diversification of the SEP during surgery, the patients were divided into 2 groups. The preoperative and postoperative JOA scores of the OPLL patients were collected. Results There were 35 patients in the SEP no change group and 30 in SEP improved group. There was no difference in the preoperative JOA scores between them (P>0.05), but was significantly different in the postoperative JOA scores (P>0.05). Conclusion There is some relationship between the SEP diversification during operation and the short term outcome of OPLL of cervical spine.

Twenty-seven patients of limb fractures with osseous defect were selected from Department of Orthopedics in the 3rd Hospital of Hebei Medical University between April and October in 2003. They all agreed the informed consents and received emergency one-stage implantation of coralline hydroxyapatite. Postoperative restoration of limb fractures with osseous defect was investigated by using X-ray for average 186 days. Among 27 included patients, 25 ones were involved in the result analysis, and 2 ones lost. The implants and osseous tissue were not closely integrated in 1 case, were partial integrated in 2 cases, and 22 cases showed close integration. No case appeared whole or local adverse effects.

Objective To treat femur fracture in neonates using a new homemade harness designed and observe the effec of this harness. Methods Designed a new harness used in femur fracture in neonates,and used this harness in 7(8 femur fracture)csses,including 6 boys(7 femur fracture)and 1 girl,the age from 1 day to 12 days(average 4.7 days).Those cases included proximal thirds(2 cases)and middle thirds(6 cases)of femur fracture.The angle of fracture was from 44°to 83°(average 62.4°)before treatment. Results The angle of fracture was from 0°to 22°(average 14.0°)after treatment using the harness.Hespitalization was from 2 to 3 days.There were no skin sloughing or harness breaking off.All cases were followed up 6 to 36 months(average 21.3 months).All femur fracture healed in good alignment with leg-length discrepancy＜1 cm.Movement of hip and knee was normal. Conclusions The harness is a better method to treat femur fracture of the proximal and middle thirds in neonates.Advantages of it include simply operation,minimal hospitalization,minimal cost,and easy nursing.

Objective To assess the safety and feasibility of CT-guided percutaneous argon-helium cryoablation in the treatment of adrenal tumors.Methods 1 7 patients with adrenal tumors were treated with CT-guided percutaneous argon-helium cryoablation. Three of these patients were retreated second cryoablation three months later due to the lager tumor diameters.Percutaneous tran-scatheter arterial embolization was performed in four patients because of rich blood supply before cryoablation.Continuous arterial blood pressure monitoring was performed in eight pheochromocytoma patients.Results Technical success was achieved in all pa-tients.There were no serious complications.Eight pheochromocytoma patients experienced a significant increase in systolic blood pressure and diastolic pressure when compared with the basic values (P <0.05).There were no enhancement on enhanced CT and/or up-take on FDG PET-CT in the ablated zones during the follow-up period (3-24months).Conclusion It is safety and efficacy of CT-guided percutaneous argon-helium cryoablation for adrenal tumor.It might be initial treatment of choice for the patients who were not suitable for resection.

Objective To compare the clinical outcomes between proximal femoral nail antirotation (PFNA) combined with zoledronic acid and PFNA only in the treatment of osteoporotic intertrochanteric fracture in the elderly patients.Methods A retrospective analysis was made on 72 patients that completed the follow-up after PFNA for osteoporotic intertrochanteric fracture from November 2011 to May 2014.According to the application of zoledronic acid (5 mg,once a year) after PFNA,the patients were divided into study group (n =30) and control group (n =42).Bone healing and subsequent refracture were assessed with X-ray postoperatively.Harris hip score was recorded.Bone mineral density before operation and one year after operation were compared between the two groups.Adverse effect of zoledronic acid was recorded during hospitalization.Results Mean period of follow-up was 15 months (range,12-26 months).One year after operation,Harris score,new fracture incidence,mean fracture union time were (82.65 ± 6.24) points,3％ (1/30) and (14.26-± 2.24) weeks in study group,while (81.85 ± 5.38) points,14％ (6/42) and (15.26 ± 3.05) weeks in control group.There were no statistical differences between the two groups (P ＞ 0.05),but the subsequent fracture was higher in control group.One year after operation,lumbar and contralateral non-injury hip bone marrow density were (0.78 ± 0.16)g/cm2 and (0.71 ± 0.14)g/cm2 in study group,higher than (0.75 ± 0.13)g/cm2 and (0.69 ±0.13)g/cm2 in control group (P ＜0.05).But there were no significant differences between the two groups before operation.All fractures were healed at postoperative 1 year.No intolerable adverse events occurred in study group.Conclusions PFNA is effective in the treatment of osteoporotic intertrochanteric fracture.In the meantime,the combination with zoledronic acid has no influence on bone healing while increasing bone mineral density,and may decrease the occurrence of subsequent fragile fractures.

Objective To investigate the effect of different pore sized hydroxyapatite for promoting bone vascularization in tissue engineering.Methods Male Wistar rats were randomly divided into three groups,named group A,B and C,which were im-planted hydroxyapatite bioceramics compositing 4 μg bone morphogenetic protein with different aperture of 200 -300,350 -450, 500-600 μm in the back subcutaneously.The size of each block was 5 mm×5 mm×1 mm in a weight about of 40.0 mg.After im-plantation,the animals were killed and the implants and the surrounding tissue were taken out at the first,second,third and forth week respectively.HE staining of histological analysis was used to detect the situation of local neovascularization.Results There was significant difference between second and third week in group A.Comparing the area of vascularization at different time points in group B and group C,there were significant difference in the comparison of intragroup (P <0.05 ).During the first week after surgery,there was only group C that had the area of vascularization.During the second and forth week after operation,the area of vascularization in group B and group C were significant higher than group A (P <0.05).The C group showed a great deal of new-born blood vessels and clear formation of bone trabeculae.Conclusion The hydroxyapatite bioceramics of 500-600 μm could better promote vascalarization of tissue engineering in bone.

ObjectiveTo explore the effect of swimming on motor behavior and expression of brain derived neurotrophic factor(BDNF) and trkB in adrenal body.MethodsSD adult rats were divided into normal cotrol group and swimming group ( n=10 in each group).All rats in swimming group were subjected 6 weeks swimming for 1h each day.Motor performances including swimming speed and distance were recorded and expression of BDNF and trkB in adrenal body was measured.ResultsThere was a significant increase in swimming speed ( ( 157 ± 60) m/min) and distance ( (283.36 ±49.50)m) in swimming group,compared with control group ( (283± 60) m/min,( 156.92 ± 29) m) (P ＜ 0.05 ).Simultaneously,expression of BDNF in adrenal body had been significantly unregulated (0.93 ± 0.09 vs 0.56 ± 0.19 ) (P ＜ 0.05 ),while expression of trkB kept to be not changed.ConclusionSwimming increases notor ability in rats,and the possible mechanism may be related the upregulation of BDNF in adrenal body.

Objective To analyze the correlation between detection of influenza pathogenic subtypes and epidemic situation in Hefei City during the surveillance years of 2015-2021, and to provide references for developing influenza prevention and control strategies. Methods The relevant data of influenza-like illness (ILI) surveillance, influenza etiology, and outbreak/cluster outbreaks reported from influenza surveillance sentinel hospitals in Hefei City from 2015 to 2021 in the China Influenza Surveillance Information System were analyzed. The statistical analysis was carried out. Results A total of 3 332 553 outpatient and emergency visits in 2 sentinel hospitals were reported in Hefei City from 2015 to 2021, of which 139,082 were ILI cases, accounting for 4.17%. The monthly proportion ranged from 1.60% to 7.15%. A total of 14 663 ILI specimens were submitted for detection, the submission rate was 10.54%, and the positive rate of influenza virus detection was 11.30%. There was no correlation between the proportion of monthly influenza like cases and the detection rate (r_s=0.176, P=0.107). The composition ratio of each subtype of influenza virus varied greatly, showing diversified seasonality, and the epidemic strains changed constantly. The Victoria subtype (BV subtype) was dominant (40.21%). There was a moderate correlation between the positive rate of ILI in sentinel hospitals and the number of outbreaks per month (r_s=0.696, P=0.000). There was a strong correlation between the monthly number of outbreaks and the detection rate (r_ss=0.696, P=0.000). There was a strong correlation between influenza A virus H3 subtype and BV subtype (r_{s -H3}=0.686, P=0.030; r_{s -BV}=0.632, P=0.000). There was a moderate correlation between the new A1 subtype and B Yamagata subtype (r_{s -new A H1}=0.481, P=0.000 0; r_{s -BY}=0.515, P=0.000). Conclusion There are two epidemic peaks in spring and winter in Hefei. Influenza subtypes are diverse. The results of ILI etiology can predict the outbreaks of different subtypes of influenza. Prediction and surveillance should be used for influenza control and outbreak management in a timely manner.

Objective To retrospectively analyze the etiology and prognosis of the children and adolescents with situational syncope in a single center.Methods There were 4 274 cases of children and adolescents [aged from 2 to 18 years old,the average age being (10.82 ± 3.13)years old],male 2 208 cases,female 2 066 cases with ortho-static intolerance syndromes,such as unexplained syncope or symptoms of presyncope,etc,who were treated at Children's Syncope Outpatient Department or Inpatient Department in the Second Xiangya Hospital,Central South University from January 2000 to November 2017.All subjects underwent detailed history investigation,careful physical examinations, routine 12-lead electrocardiogram,Holter electrocardiogram(ECG),chest X-ray,echocardiography,electroencephalo-gram(EEG)and head computerized tomography(CT)or magnetic resonance imaging(MRI),blood biochemical exami-nation (including fasting glucose,myocardial enzymes)and organic diseases in the heart,brain,blood vessels were ex-cluded,but the cause of syncope was still not clear.The head-up tilt table test (HUTT)was performed after the pa-tients or/and the families wrote the informed consent agreement.Results A total of 177 (4.14%)patients with situa-tional syncope were diagnosed among 4 274 cases.Etiology included the abdominal musecle exercise (35.59%,63/177 cases),urination (24.29%,43/177 cases),bathing (9.60%,17/177 cases),defecation (7.34%,13/177 cases), singing (5. 08%,9/177 cases),rides (4.52%,8/177 cases),blood-injection-injury phobia (3.95%,7/177 ca-ses),swallowing (3.39%,6/177 cases),and hair-grooming (2. 82%,5/177 cases),syncope during acupuncture treatment (2. 26%,4/177 cases),and cough (1.13%,2/177 cases). The common positions were upright position (84.18%,149/177 cases),squatting to standing position (8.47%,15/177 cases),sitting position (5.08%,9/177 cases),and squatting position (2.26%,4/177 cases).HUTT positive rate was 69.49%(123/177 cases),common type of hemodynamic were the vasodepressive type of vasovagal syncope (45.20%,80/177 cases),mixed type of vaso-vagal syncope (19.77%,35/177 cases),postural orthostatic tachycardia syndrome (3.39%,6/177 cases)and the cardiac suppressive type of vasovagal syncope (1.13%,2/177 cases).In 35 cases of situational syncope,the number of children and adolescents with syncope was significantly reduced by health education and upstanding training.By the first follow-up review,the cases were reduced from (2.69 ± 1.81)times to (0.59 ± 0.96)times after healthy edu-cation of 2-16 weeks [(4.97 ± 3.16)weeks].By the second follow-up review,3 out of 8 cases did not faint,3 cases fainted 1 time,1 case fainted 2 times,and 1 case fainted 4 times.The outcomes of the first reexamination of HUTT in 16 cases were negative,and other 3 cases were negative by twice visit.Conclusions The etiology of children and adoles-cents are flag-raising(abdominal muscle exercise),urination,bathing,defecation,singing,riding,blood-injection-injury phobia,swallowing,hair -grooming,syncope during acupuncture treatment and coughing. Healthy education is good for situational syncope.

OBJECTIVE: To analyze the incidence of long (short) PR interval in electrocardiogram among healthy people in Changsha and the clinical significance.
 METHODS: Twelve-lead body surface electrocardiogram was taken to measure the heart rates and PR intervals from 4 025 healthy individuals (age range from 6 min after birth to 83 years old) who performed physical examination from Jan, 1993 to Dec, 2012 in the Second Xiangya Hospital, Central South University. Statistics were analyzed by SPSS 16.0.
 RESULTS: The total incidence of short PR interval was 19.65% (791/4 025). The age group from birth to 13 years old had a higher incidence than the other age groups (χ2=432, P<0.01). The age groups from 1 month after birth and from 1 month to younger than 1 year-old displayed the highest incidences (43.29% and 44.34%, respectively). The lowest incidences were obtained from the 14-17 year-old, 40-49 year-old and 50-59 year-old groups (0.20%, 0.41%, and 0.33%, respectively). The total incidence of long PR intervals was 3.58% (144/4 025). The 1 year-old group had the highest incidence (6.74%), which decreased with the increase of age. The lowest incidence of long PR intervals occurred in the age group from 14-17 years old, which gradually increased after 50 years old. There were no significant differences in long (short) PR intervals between the gender (P>0.05).
 CONCLUSION The incidence of long (short) PR intervals varies in different age groups of healthy people. The incidences of long (short) PR intervals in children before 10 years old are higher than those in adults, especially the short PR intervals, as a result of the heart rate affected by childhood autonomic nervous function and the change in atrial volume with age. Adults have long (short) PR interval should be regularly followed-up to prevent cardiovascular events.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Child ; Child, Preschool ; Electrocardiography ; Heart Conduction System ; physiopathology ; Humans ; Incidence ; Infant ; Infant, Newborn ; Middle Aged ; Young Adult