Objective To examine the dyllamic changes in excitatory and inhibitory amino acid neurotransmitter release in the spinal cord in a rat model of incisional pain.Methods Twelve healthy adult male SD rats weighing 250-300g were anesthetized with intraperitoneal chloral hydrate 300 mg/kg.A loop microdialysis catheter was implanted into the subarachnoid space via the atlanto-occipital membrane and advanced for 8.5 cm candad until lumbar region.The animals were randomly divided into 2 groups(n=6 each): control group(C) and incisional pain group(I).Incisional pain was produced by the plantar incision in the tight hindpaw under 1.2% isoflurane in group I while group C received only anesthesia with 1.2% isoflurane.The microdialysis samples were collected before incision(To,baseline)at 3 h,1 d,2 d and 3 d after incision(T1-4) for determination of amino acid using HPLC.The pain behavior was assessed and scored (O=no pain,2=severe pain) at the above time paints.Results In group I the aspartate and glutamate concentrations in the microdialysis samples were significantly increased at 3 h after incision(T1) as compared with the baseline value at To and returned to the baseline level at l d(T2);the glyeine and r-amino butyric acid concentrations were signifieantly increased at ld (T2)and returned to the baseline level at 2 d(T3).The cumulated pain scores were significantly increased at 3 h,1 d and 2 d after incision and returned to baseline level at 3 d (T4) in group I.Conclusion The increased release of excitatory amino acid neurotransmitter in the early phase after incision may be involved in hyperalgesia while the increased release of inhibitory amino acid neurotransmitter in the later phase may be involved in the pain relief.

OBJECTIVE To study the diagnosis and treatment of parotid acinic cell carcinoma. METHODS The clinical data of 19 cases with parotid acinic cell carcinoma treated from 1985 to 2007 were retrospectively reviewed.Four patients underwent superficial parotidectomy,5 patients underwent total parotidectomy,6 patients underwent superficial parotidectomy plus partial deep parotidectomy,6 patients underwent total parotidectomy and neck dissection.Eight patients received postoperative radiotherapy.One patient only received radical radiotherapy after biopsy.All patients were followed up for 1 to 20 years.RESULTS Nobody died after operation.Five cases recurred after operation, and the recurrence rate was 26.3%(5/19) CONCLUSION The main treatment for parotid acinic cell carcinoma is complete resection and postoperative radiotherapy.

The authors analyzed current situation of teachers'professional development in medical colleges and universities. The construction of teachers'professional development systems includes dividing the stage of development and setting the standard,constructing teachers'evaluation model,constructing interscholastic and scholastic teachers'education pattern,enriching the training contents and diversifying the training ways.

ObjectiveTo explore the relationship between diet habits and constitution type of 8448adults from 9 provinces and municipalities of China.MethodsA total of 8448 participants from Jiangsu,Anhui,Gansu,Qinghai,Fujian,Beijing,Jilin,Jiangxi and Henan Province were enrolled in this study.The clinical information of constitution type,diet habits and demographic characteristics was collected.Logistic regression analysis was used to evaluate the relationship between diet habits and constitution type.ResultsLogistic regression analysis showed that gentleness type and Qi-deficiency were correlated with sweet food ( OR =1.22,P ＜ 0.05 ). There was a significantly positive correlation between Yangdeficiency and hot food intake ( OR =2.89,P ＜ 0.05 ),as well as between Yin-deficiency and cold food intake ( OR =1.56,P ＜ 0.05).Phlegm-wetness was mainly caused by fatty food consumption ( OR =2.07,P ＜ 0.05 ).Barbecue food was positively correlated with Wet-heat type ( OR =1.64,P ＜ 0.05 ),Bloodstasis type ( OR =1.37,P ＜ 0.05 ),and Qi-depression type ( OR =1.35,P ＜ 0.05 ).Special diathesis type was related to dietary preference of sweet food ( OR =1.29,P ＜ 0.05 ).ConclusionDifferent type of constitution may be related to specific lifestyle or diet habits,and diet habit might play a positive role in Gentleness type or health condition.

Objective To comprehend the students＇evaluation of PBL combined with scenario simulation teaching practice,and provide evidences for further improvement and refinement of teaching methods.Methods Twelve nursing undergraduate students participated the semi-structured interviews.Results PBL combined with scenario simulation teaching practice was superior to the traditional teaching method,because it can develop nurses＇ core competence,stimulate students＇interest in learning,enhance the independent learning ability and strengthen students＇capability in cooperation.However,there were still some problems to be solved.For example,the focal points were not prominent,the gap between students was widened.This added to students＇burden,and put forward various new request and challenges to teachers.Conclusions PBL combined with scenario simulation teaching method reflects a new teaching idea.It is helpful for developing nurses＇core competence,stimulating students＇interest in learning,enhancing team-work spirit.There are still some shortcomings in the implementation of PBL combined with scenario simulation teaching practice,it should be further developed to improve the teaching effectiveness.

Objective To investigate the time-dependent changes in glutamate (Glu) and 7-aminobutyric acid ( GABA) release in the rostral ventromedial medulla in a rat model of incisional pain. Methods Healthy male SD rats weighing 250-300 g were used in this study. Twelve rats in which microdialysis cannulae were implanted in the right rostral ventromedial medulla without neurological deficits were randomly divided into 2 groups ( n = 6 each): group A control and group B incisional pain. In group B an 1 cm long incision was made in the plantar surface of right hindpaw under 1.2% isoflurane anesthesia which was maintained for 5 min. Samples of dialysate were collected before incision (T_0 baseline) and at 3 h, 1 d, 2 d and 3 d after incision was made (T_(1-4)) in both groups for determination of Clu and GABA concentrations (by HPLC). Results In group B Glu and GABA concentrations in the dialysate were significantly increased at 1 d (T_2) and 3 h-3 d (T_(1-4)) respectively as compared with the baseline value at T_0 and were significantly higher than those in group A (control group). Conclusion Incisional pain increases the release of Glu and GABA in the rostral ventromedial medulla which might influence the function of descending pain modulation pathway.

Objective To evaluate the effect of intravenous Gd-DTPA on DWI of breast. Methods DWI was performed before and after Gd-DTPA injection on 25 patients with breast cancer confirmed by core or fine-needle aspiration biopsy. The signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and ADC values were measured on DWI when b = 0 and 1000 s/mm2 were selected. A paired t-test and non-parametric test were used to compare the differences between SNR, CNR and ADC values before and after enhancement in breast cancer and normal breast. Results There were no significant differences between the SNR(34. 56 ± 11.34 and 33.60 ± 14. 34 for cancer, 9. 88 ± 3.16 and 10. 42 ± 4. 18 for normal breast)and CNR( 24. 16 ± 9. 05 and 22. 26 ± 10. 05 ) before and after administration of contrast medium in breast cancer and normal breast, and no significant differences between the ADC values before and after administration of contrast medium in breast cancer [(0.96±0. 13) × 10-3 vs (0.95±0. 14) × 10-3 mm2/s] and normal breast[(1.90±0.47) × 10-3 vs (1.91±0.61) × 10-3 mm2/s], either (P =0.20 and 0.97). Conclusion It is possible to repeat DWI acquisition after administration of contrast medium in breast MRI.

Objective To investigate the application value of MR rthrography (MRA) in the diagnosis of acetabular labral tears. Methods Fifteen patients with a high degree of suspected acetabular labral tears received fluoroscope-guided injection of the contrast media into the hip joint ( hip arthrography) and fat-saturated spin-echo T1-weighted images were obtained in the coronal, sagittal, oblique-axial and radial planes. Hip arthroscopy was performed on 12 of them. Results Labral tears which were diagnosed in 11 patients by hip MRA were confirmed at hip arthroscopy. One patient showed no MRA indication of labral tear, also showed normal on arthroscopy. Tear in the anterior-superior quadrant 10 cases of 12 joints ( 12/13), posterior-superior quadrant 1 case of a joint (1/13). In 11 patients who underwent arthroscopy, hip MRA diagnosed 3 (3/13) joints labral tears in coronal planes, 10 (10/13) joints in sagittal planes and 13 (13/13) labral tears in axial-oblique and radial planes. In 15 patients with 20 hip joints, 5 cases 6 joints (6/20) with normal acetabular sublabral sulcus were performed. Conclusions MR arthrography of hip is a reliable method in the diagnosis of acetabular labral tears. Scanning method should be included fat-saturated spin-echo T1-weighted images in sagittal and oblique-axial planes or sagittal plus radial planes. The diagnosis of tor posterior-inferior quadrant should pay attention to the existence of a normal variation.

Medical psychology master's degree graduate student course mainly includes basic cour-ses, professional courses and psychological skills training, professional practice skills learning and scientific research quality training. Due to the constraints of discipline development starting late, teachers being rela-tively weak and other objective factors, in curriculum setting, there exist problems of unclear objectives, confusing the primary with secondary, unclear standard, lacking principles, and in particular, there are obvious deficiencies in the training and cultivation of students' ! professional skills . Based on the above objective problems, we made preliminary discussion on the training objectives, the main problems, curricu-lum setting, assessment standards and principles to follow, in order to achieve the purpose of cultivating high-level application-oriented talents through curriculum design and teaching practice.

Objective To investigate the influence of different axial lengths (AL) on corneal curvature (CC),corneal astigmatism (CA),anterior chamber depth (ACD) and intraocular pressure (IOP) in age-related cataract.Methods Ocular data of 368 patients 368 eyes from Zhongnan Hospital of Wuhan University undergoing cataract surgery were retrospectively reviewed.AL,corneal curvature,corneal astigmatism and anterior chamber depth were measured using IOL-Master (Zeiss,German),and the intraocular pressure was measured using an iCare tonometer.Together 80 patients (80 eyes) selected from these patients with different AL using random number table were randomly divided into three groups,including short,moderate and long AL group.Spearman's rank test was used to assess the correlation between AL and ocular biological parameters.Each parameter was compared by one-way analysis of variance among the three groups,respectively.Results Spearman's rank test presented that AL was related with CC (r =-0.424,P ＜ 0.001),CA (r =0.138,P =0.008) and ACD (r =0.561,P ＜0.001),but there was no correlation of AL with IOP (r =0.064,P =0.326).The AL was negatively correlated with CC,positively correlated with CA and ACD,but there was weak correlation between AL and CA,as well as moderate correlation of AL with CC and ACD.The CC of the moderate and long AL group was significantly different from that of the short AL group (all P ＜ 0.001),but there was no significant difference between moderate and long AL group (P =0.438).Moreover,difference in CA was not statistical significant between short and moderate AL group (P =0.333) as well as between moderate and long AL group (P =0.718),but its difference approached statistical significance between short and long AL group (P =0.042).Pairwise comparison of ACD among the three groups had significant difference (all P≤0.001),but difference in IOP was not statistically significant with palrwise comparison (all P ＞ 0.05).Conclusion CC is negatively related to AL,and CA is weakly correlated to AL;meanwhile,it is possible to show that the degree of CA increases as AL gets longer.There is a moderate correlation between ACD and AL,while there is no relationship between AL and IOP.