Objective To detect the levels of plasma N-terminal pro-brain natriuretic peptide (NT-proBNP) and investigate its relationship with liver function, ascites and heart structure in patients with liver cirrhosis. Methods The levels of plasma NT-proBNP and various clinical and biochemical parameters were determined in 60 patients with liver cirrhosis and 30 healthy controls. Meanwhile Child-Pugh liver function was classified. All people underwent color Doppler echocardiography. Results The level of plasma NT-proBNP was significantly elevated in patients with liver cirrhosis [(38.63±36.05)pmol/L], compared with that of the controls [(7.50±8.25)pmol/L],P<0.01. There was no significant difference in different Child-Pugh class and aseites amount of liver cirrhosis. E/A < 1 and E wave decelerate time (EDT) was in-creased in liver cirrhosis. Conclusion The levels of plasma NT-proBNP in liver cirrhosis are significantly elevated, and related to early impairment of diastolic function. But it does not correlate with liver function and aseites.

OBJECTIVE To study the clinical value of superficial layer coagulation of trigeminal sensory root in the treatment of trigeminal neuralgia. METHODS The clinical data of 5 cases with trigeminal neuralgia were studied. Head MRI (B-FFE) examinations were made before surgery and operations were performed via retrosigmoidal approach. One case with left facial pain showed 3 arteries with offsets crossing and compressing the left trigeminal nerve. Among 4 cases with right facial pain,3 cases had an artery compressing the right trigeminal and the nerve were distorted and moved from its original site,one case with an artery going with trigeminal nerve sensory root branchlets. All cases were no indications for microvascular decompression and thus were treated with surface coagulation of trigeminal nerve sensory root. RESULTS Pain disappeared instantly after operation and facial sensory were retained. All cases were followed up for 2.4 to 5 years and no recurrences were found. CONCLUSION Superficial layer coagulation of trigeminal sensory root is a safe and effective method for the treatment of trigeminal neuralgia.

Objective To study the simple preparation method and structure of nano-hydroxyapatite/collagen composite, to investigate new substitute of repairing bone for using in tissue engineering. Methods Porous nano-hydroxyapatite was made of Ca (OH)2 and H3PO4. Collagen was drawn from fresh adult bovine tendon. The two materials were prepared into biomembrane through the glutaraldehyde and freeze-drying. The crystallite phase, micro-morphology, structure, crystallite size of the composite were examined by XRD and scanning electronic microscop (SEM). Results The results showed that the composite structure was porous and consisted of nano-hydroxyapatite (10 nm ? 50 nm - 20 nm ? 80 nm) and collagen fiber. The crystallite phases and size of the composite was similar to that of natural bone. Conclusion The porous nano-hydroxyapatite /collagen composite is expected to be an ideal substitute of repairing bone.

Aim To study and compare the pharmaco-kinetic parameters of roxithromycin under normoxic and hypoxic rats. Methods A highly effective and rapid ultra-performance liquid chromatography with tandem mass spectrometry ( UPLC-MS/MS) method with posi-tive electrospray ionization source was successfully de-veloped and validated for quantification of roxithromy-cin in rat plasma. Sprague-Dawley rats were randomly divided into the hypoxia and normoxic groups. Each rat obtained a single dose of roxithromycin with 10 mg · kg-1 via intragastric administration. The pharmacoki-netic parameter comparison between normoxic and hy-poxic groups was calculated by SPSS software using in-dependent sample t test method. Results The main pharmacokinetic parameters of roxithromycin between the normoxic and hypoxic rats were:the AUC(0-t) 7 576 and 3 761 μg·h·L-1 , MRT(0-t) 5. 6 and 7. 7 h, T1/2 3. 4 h and 3. 9 h, CL 1. 5 and 3. 0 L · h-1 · kg-2 , tmax3. 1 and 3. 4 h, Cmax 1 116 and 372 μg·L-1 , re-spectively. The levels of Cmax and AUC of roxithromy-cin in hypoxic rats were statistically lower than those in normoxic rats. Conclusion The exposure level of rox-ithromycin in hypoxic rats markedly decreased. Our re-sults may provide an important experimental basis to adjust the dosage for roxithromycin in hypoxic clinical practice.

Objective To establish an simple and convenient animal model of cardiac arrest for studying cerebral resuscitation.Method Clean male Sprague Dawley rats were randomly divided into sham group and experimental group.Cardiac arrest was induced by asphyxiation and ice-cold 0.5 mol KCl with blood flow cut off for 5 minutes.Animals were resuscitated with external cardiopulmonary resuscitation (CPR),mechanical ventilation,and epinephrine injection.Blood pressure,heart rate,successful ratio of resuscitation after 72 hours, time of cardiac arrest (T_(CA)) and return of spontaneous circulation (T_(ROSC)) were recorded.Neural deficit scores (NDS) and levels of maleic dialdehyde (MDA) in plasma were evaluated at 3,6,12,24,48,72 hours after ROSC.The damage score of cortex was measured by transmission electron microscope examination at 3 hours and 72 hours after ROSC.Results All the rats in experimental group had cardiac arrest rapidly.T_(CA) and T_(ROSC) were (137.3?10.2) seconds and (64.4?9.3) seconds,respectively,while the successful rate of resuscitation was 82.5%.The lowest NDS was at 3 hours after ROSC,while the NDS increased gradually.After CPR,the level of MDA in plasma increased significantly,slightly declined at 72 hours after ROSC,but still significantly higher than before the model.Electron microscope examination of cortex showed neuron slightly,organelle and astrocyte,but became better after 72 hours post ROSC.Conclusions The model of cardiac arrest was easy to establish,and the data provided was accurate,which is useful to study the mechanism of cerebral resuscitation.

Objective To compare anatomically the potential incidences of injury to the nerve roots of ventral and dorsal rami caused by the transarticular screws and Magerl lateral mass screws in the fixation of subaxial cervical spine.Methods Fixations with the transarticular screws and Magerl lateral mass screws were performed in this study.For each kind of fixation,20 screws were inserted from C3 to C7 in two specimens.A 20-ram long screw was used to over-penetrate the ventral cortex.The anterolateral aspect of the cervical spine was carefully dissected to allow ob- servation of the screw-ramus relationship.Results The overall percentage of nerve violation was significantly lower in the transarticular screw fixation(45%)than in the Magerl lateral mass screw fixation(90%).The difference was sta- tistically significant between the two fixation methods(P＜0.05).The greatest percentages of nerve violation caused by the transarticular screws and lateral mass screws were found at the dorsal ramus,25% and 45%,respectively. Conclusion The potential risk of nerve root violation caused by the transarticular screw technique is lower than that by the Magerl lateral mass screw technique in the lower cervical spine.

Objective:To study the occlusion characteristics of the young subjects with bruxism before and after treatment by elastic occlusal splint. Methods:10 patients with bruxism and aged 22-27 years(n=10) were treated by elastic occlusal splint, before and 6 months after treatment they were examined by T-Scan occlusion detector. The occlusion time( OT) , disclusion time( DT) , oc-clusion force( OF) , the perentage of occlusion force( POF) , the changes of the position of center occlusal force( COF) and the asym-metry index of occlusion force(AOF) were observed and compared with those of the healthy controls(n=10). Results: ① In the case group there was significant difference in the OT and DT between left and right anterior teeth before treatment (P<0. 05), but not after treatment (P>0. 05). There was significant difference in the momevent of COF of left and right side, the POF of right side and the AOF between the 2 groups before treatment, but not after the treatment(P>0. 05). ② In the case group after treatment the OT and DT of left and right anterior teeth were shortened(P<0. 05). The POF of right side and the AOF were significantly improved. In the case group DT, OF center excursion, the left POF and the AOF showed no significant difference before and after treatment( P>0. 05). Conclusion:The occlusal factors such as early contact, lateral teeth synthetic interference, occlusal force center excursion have close relationship with bruxism. Elastic occlusal splint can effectively correct muscle dysfunction and make occlusal relationship more coordinated and stable, and therefore is effective in the treatment of bruxism.

Objective To evaluate effects of glucocorticoids on maxillary bone mineral density in rats with acute adriamycin-induced nephrotoxicity (ADR). Methods Forty rats were randomly divided into four groups, control group, glucocorticoids- treated group, ADR group and ADR + glucocorticoids- treated group. ADR group and ADR +glucocorticoids-treated group were given 4 mg/kg adriamycin injection via tail vein to establish ADR model. Control group and glucocorticoids-treated group were given 4 mg/kg saline injection via tail vein. After establishment of ADR model, glucocorticoids-treated group and ADR + glucocorticoids-treated group were intragastric administration of 30 mg/(kg · d) methylprednisolone for 10 weeks, and control group and ADR group were given the same volumes of normal saline. Values of bone calcium pigment (BGP), type Ⅰ collagen, N-terminal pro-peptide (PINP), β-Ⅰ type collagen C-terminal cross-linked telopeptide (CTX) were detected by ELISA. The micro-CT scan was used to measure Tb.Th, Tb.Sp, Tb.N, BVF and bone mineral density (BMD). Results Compared with other three groups, the levels of BGP and PINP were significantly decreased, and CTX were significantly increased in ADR + glucocorticoids-treated group (P<0.05). Micro-CT analysis showed that there was significant maxillae osteoporosis, including changes of porous micro architecture, lower BMD, decreased BVF, lower Tb.Th and widening Tb.Sp in ADR + glucocorticoids-treated group (P<0.05). There was no significant difference in Tb.N between four groups. Conclusion There is imbalanced bone metabolism in rat model of ADR. High-dose hormone therapy can accelerate the occurrence of osteoporosis, decrease bone metabolism, and affect bone structure.

Objective: To explore the state of mental health level of students in private college.Methods Private college students in Xi'an were tested with SCL-90,and the results were compared to those in domestic general college norm.Results: The mental health level of private college students is worse than that of general college students.Further more,there is also remarkable difference of the mental health level between new students with the junior and senior college students.Conclusion: The mental health state of private college students is not optimistic and should be taken seriously by the department responsible.For improve the mental health level of the private college students,the works and mental guides should be strengthened in private college.

Objective To investigate the levels of adiponectin and the relation with insulin and tumor necrosis factor(TNF)- ? in patients with cirrhosis. Methods Adiponectin,insulin and TNF-? levels were determined in 73 patients with cirrhosis and 30 healthy controls, and were correlated with various clinical and biochemical parameters. Meanwhile Child-Pugh liver function was classified. Results Adiponectin was significantly elevated in patients with cirrhosis compared with the control. Adiponectin levels in cirrhosis was correlated positively with insulin and negatively with insulin sensitively index,and did not correlate with TNF-? and liver function.Conclusion Serum adiponectin levels in cirrhosis are significantly elevated. Adiponectin levels do not correlate with TNF-? and liver function, but exclusively insulin and insulin sensitivity index.