ObjectiveTo assesses the skeletal development of adolescent in Yantai area, and investigates the characteristics of the tendency of their skeletal development. MethodsTotally 1180 healthy adolescents ( 574 males and 606 females ) at 10 to 20 years of age living in Yantai area were randomly selected, and their left wrist were radiated at the posterior-anterior position. The bones at wrist were scored according to the Chinese Wrist Skeletal Development Standard CHN Method. The correlation among skeletal age, chronological age and the sex were analyzed. ResultsSkeletal age positively correlated with chronological age (male: r=0.943,females: r=0.942,totally: r=0.942). ConclusionThe skeletal development of adolescent in Yantai area has the characteristic of acceleration. So it is necessary to establish a new skeletal age standard for the skeletal development of adolescent.

Objective To study the effect of mechanical tension on collagen arrangement and illustrate the relationship between tissue architecture and tension properties. Methods Cell morphologies, orientation and collagen arrangement of fibroblasts cultured in three different types of collagen gels with variation of mechanical tension were observed by phase contrast photomicrographs, light microscopy and transmission electron microscopy. Expression and distribution of a-smooth muscle actin (α-SMA) were investigated by immunohistochemistry. Results Phase contrast photomicrographs, light microscopy and transmission electron microscopy showed high level of tension distributed anisotropically in the monolayer gels and the anchored collagen gels, with bipolar shape of the fibroblasts, obvious polarity, arrangement of exogenous collagen fibres parallel to the long axis of the fibroblasts, especially prominent in monolayer gels. Low level of tension distributed isotropically was observed in floating collagen gels, with stellate morphology and arrangement of exogenous collagen fibres in a reticular array. Immunofluorescence showed that fibroblasts expressed high level of α-SMA protein distributed along the long axis of fibroblasts in the monolayer gels and the anchored collagen gels, especially in former ones. In contrast, few expression of α-SMA protein was found in floating collagen gels. Cell morphologies and orientation, expression and distribution of α-SMA as well as collagen arrangement of fibroblasts in the monolayer gels and the anchored collagen gels were similar to those in granulation tissue, whereas floating collagen gels resembled normal dermis or remodelled tissues. Conclusions Tissue architecture or morphology of the dermis are corresponding to tension proporties. Different tissue architectures are closely correlated with particular tension proporties.

Objective To investigate the variation of coagulation markers and its clinical value in type 2 diabetes patients. Methods The plasma levels of von Willebrand factor: antigen (vWF: Ag), thrombomodulin (TM), prothrombin fragment 1+2 (F 1+2 ) and P selectin were measured by ELISA in 65 patients with type 2 diabetes (including 33 patients with vascular complication) and 38 healthy people. Results The plasma level of vWF:Ag, TM, F 1+2 and P selectin in group of type 2 diabetes were significantly higher than that of normal controls ( P

Objective To observe the effects of sevoflurane and propofol on cerebral oxygen metabolism and postoperative cognitive function during cardiopulmonary bypass (CPB). Methods Fifty ASA Ⅱ or Ⅲ patients aged 40-65 years old scheduled for cardiac valve replacement surgery with CPB were randomly assigned into two groups,sevoflurane group (group S) and propofol group (group P),25 in each group.Two groups of patients used the same method of anesthesia induction:midazolam 0.1 mg?kg-1,sufentanil 0.7 μg?kg-1,vecuronium 0.1 mg?kg-1,and etomidate 0.2 mg?kg-1 were intravenously injected successively,and then tracheal intubation was performed.For maintenance of anesthesia,patients of group S continuously inhaled 3%-4% sevoflurane, and patients of group P were intravenous pumped with propofol 4-6 mg?kg-1?h-1 via vein;midazolam,sufentanil and vecuronium bromide were intermittently injected in both groups.At the time points of pre-bypass (t1), nasopharynx temperature dropping to constant temperature regularly ( t2 ) ,nasopharynx temperature rising to constant temperature regularly ( t3 ) ,1 h after the end of CPB ( t4 ) ,and 6 h after the end of CPB ( t5 ) ,blood from radial artery and right jugular bulb was harvested for blood gas analysis,and mini-mental state examination( MMSE) score were evaluated before and 24 and 48 h after the surgery. Results The jugular venous bulb oxygen saturation( SjvO2 ) in the two groups were both increased during T2 period and then decreased during t3 period, but arteriovenous oxygen content difference ( AVDO2 ) and oxygen extraction rate (O2ER) were both decreased during t2 period and then increased during t3 period.There was no significant difference between the two groups during t2 and t3 period (P>0.05).MMSE scores of the two groups after operation were all less than those before operation,but that was significantly higher in the sevoflurane group than in the propofol group 24 h after the surgery ( t=4.34,P<0.05) . Conclusion The two anesthesia methods can meet the need of valve replacement surgery and maintain the cerebral oxygen balance during CPB period, but sevoflurane anesthesia has fewer influences in post-operation mental nerve functional changes.

ObjectiveTo study the level of temperament and self-esteem of children aged 8～12 in Beijing city,as well as their interaction and influenced factor.Methods203 school children aged 8～12 were assessed with Carey's temperament questionnaire(8～12:MCTQ) and The Self-Esteem Scale(SES).ResultsTemperament and self-esteem of school children aged 8～12 were associated with the parental behavior,especially with work style of their fathers.The rhythmicity was found to be negative correlated to the self-esteem scores,and the intensity of reaction was found to be positive correlated to the self-esteem scores.ConclusionParents' behavior and family environment were important to the temperament and self-esteem of school children.

OBJECTIVETo investigate the effectiveness of surgical strategies for Shang Ring circumcision in the treatment of short frenulum praeputii in patients with redundant prepuce or phimosis.

METHODSTotally, 130 cases of short frenulum praeputii with redundant prepuce or phimosis were randomly assigned to an experimental group and a control group of equal number to receive Shang Ring circumcision, the former by transverse incision in the distal penis foreskin and pull-up of the interior board, and the latter by conventional transverse incision and longitudinal suture of the frenulum praeputii. Comparisons were made between the two groups in the surgical duration, intraoperative blood loss, 24 h postoperative pain visual analog score (VAS), postoperative complications, satisfaction with the penile appearance, and the quality of sexual life.

RESULTSThe surgical duration, intraoperative blood loss, 24 h postoperative VAS, postoperative sexual satisfaction, and satisfaction with penile appearance were (4.60 +/- 1.20) min, (2.61 +/- 1.81) ml, 1.73 +/- 0.76, 98.5%, and 98.5%, respectively, in the experimental group, as compared with (21.60 +/- 6.30) min, (11.10 +/- 3.40) ml, 5.37 +/- 1.84, 70.3% and 69.8% in the control, with statistically significant differences between the two groups (P < 0.05). The incidence rates of such major complications as wound dehiscence, infection, and moderate to severe edema were 1.5% (1/65), 3.1% (2/65), and 4.6% (3/65), respectively, in the experimental group in comparison with 12.3% (8/65), 15.3% (10/65), and 30.7% (20/65) in the control, with statistically significant differences between the two groups (P < 0.05). None of patients had any serious complications.

CONCLUSIONShang Ring circumcision by transverse incision in the distal penis foreskin and pull-up of the interior board, with its advantages of shorter operation time, less blood loss, mild pain, fewer complications, and higher satisfaction and acceptance of the patients, can be used as an safe and effective approach to the treatment of short frenulum praeputii.

Aged ; Blood Loss, Surgical ; statistics & numerical data ; Circumcision, Male ; adverse effects ; instrumentation ; methods ; Edema ; epidemiology ; Foreskin ; abnormalities ; surgery ; Humans ; Incidence ; Male ; Operative Time ; Pain Measurement ; Pain, Postoperative ; diagnosis ; Patient Satisfaction ; Phimosis ; surgery ; Postoperative Period ; Prostheses and Implants ; Surgical Wound Dehiscence ; epidemiology ; Surgical Wound Infection ; epidemiology

Objective To screen for differential expression of genes in bone marrow mesenchymal stem ceils (MSCs) stimulated by electromagnetic fields (EMFs) and to study the mechanism of differentiation of the bone mar- row MSCs induced by EMFs.Methods Mouse bone marrow MSCs were isolated and cultured in vitro.The third- passage cells were stimulated by EMFs,then the total RNA was extracted,purified to cDNA and reversely transcribed to yield a cRNA probe.The cRNA probes from stimulated and control cells were labelled with Cy5 and Cy3,respec- tively.The two samples were hybridized with a mouse oligo microarray,and the hybridization signals were scanned. The reverse transcriptase polymerase chain reaction (RT-PCR) was used to identify the interesting genes:Duspl and Rabl.Results A total of 153 differentially expressed genes were found comparing the stimulated group and the control group.There were 74 up-regulated genes and 79 down-regulated genes in the stimulated group.Semi-quantita- tive RT-PCR confirmed that the Duspl and Rabl mRNA expression levels of the stimulated group were up-regulated. Conclusion The gene expression profiles of the bone marrow MSCs were altered after EMF exposure.The genes are involved in cell proliferation and differentiation,transcription control,metabolism and response to stress.These re- sults provide deeper insight into the mechanism of differentiation of the bone marrow MSCs.

Objective To observe the clinical effect of Chuanxiong-Chatiao San in treatment hemicrania. Methods All patients were randomly recruited into a control group (75cases) and a treatment group (78 cases). The control group was treated with Gastrodin injection, Ligustrazine injection and Mailuoning injection; on this basis, the treatment group was treated with Chuanxiong-Chatiao powder. Both groups were treated for 14 days with a 7 days interval. Results The excellent rate and effective rate were 91.03% and 96.08% in the treatment group respectively; and 70.66% and 94.67% in the control group respectively. The difference between the two groups was significant (χ2= 12.7143,P<0.01) . Conclusion Chuanxiong-Chatiao powder combined with western medicine is effective in treating hemicrania.

Carbon Dioxide ; Dental Enamel ; injuries ; Dental Pulp ; injuries ; Dentin ; injuries ; Erbium ; Hot Temperature ; Humans ; Laser Therapy ; adverse effects ; Lasers ; Lasers, Solid-State ; Neodymium ; Tooth ; radiation effects