Objective To explore the value of quantitative tissue velocity imaging (QTVI) in quantitatively evaluating segmental systolic function of left ventricle. Methods Fifteen healthy volunteers(group A) and fifteen myocardial infarction patients (group B) were studied at apical four-chamber view, two-chamber view and apical longitudinal view using QTVI. Septal, lateral, anterior, inferior, ante-septal and posterior walls were divided into basal, middle and apical segments respectively, in total 18 segments. The systolic peak velocity (Vp), systolic peak displacement (D), systolic peak strain rate (SR) and strain (S) were measured respectively for each segment of both groups. Results For abnormal wall motion segments in group B, the value of Vp showed significant lower in 16(16/18) segments, D in 15(15/18) segments, SR in 17(17/18) segments and S in 16(16/18) segments than those in the corresponding segments of group A (all P

Inflammation is involved in the pathogenesis of many vascular disorders. Hemodynamics cause the activation of inflammatory factors in the vascular wal , resulting in dysfunction of vascular endothelial cels and vascular smooth muscle cels, activating vascular wal inflammatory cascade. Inflammatory cels, especialy macrophage infiltration and secretion of enzymes gradualy weaken the vessel wal to form aneurysm, and even cause aneurysm rupture. Therefore, inflammation plays a key role in the formation and rupture of intracranial aneurysms.

Objective To study the distribution characteristics of intraperitoneal free gas and the location value of the site of gastrointestinal perforation using multi-slice CT (MSCT).Methods 60 cases of gastrointestinal perforation were retrospectively collected.The distribution of the intraperitoneal free gas in CT image was analyzed and observed.The digestive tract were divided to the upper digestive tract and the lower digestive tract by Treitz ligament.The distribution of the intraperitoneal free gas was analyzed using χ2 test.The distribution of the intraperitoneal free gas between each different perforational site was analyzed.Results 38 cases of the site of gastrointestinal perforation located in upper gastrointestinal tract and 22 cases located in lower gastrointestinal tract,there was statistically significant difference between the upper digestive tract and the lower digestive tract about the distribution of the intraperitoneal free gas(χ2=22.33,P<0.001).In the cases of upper gastrointestinal tract perforation,13 cases of the site located in stomach and 25 cases located in doudenum,there was no statistically significant difference between stomach and duodenum(χ2=1.97,P>0.05).In the cases of lower gastrointestinal tract perforation,11 cases of the site located in bowel and 11 cases located in colon,there was statistically significant difference between bowel and colon(χ2=8.98,P<0.05).Conclusion The MSCT distribution of the intraperitoneal free gas has important value in localization diagnosis of gastrointestinal perforation.

Objective In order to investigate the role of Gap Junction (GJ) in the generation and development of epilepsy,we examined the expression of connexin43 (Cx43)and Cx32 in the epileptogenic lesions and surrounding brain tissues of the patients with refractory temporal epilepsy.Methods Thirty intractable epilepsy patients were performed the resection of epileptogenic lesions under the ECC monitor.The expression of Cx43 and Cx32 in the epileptogenic lesions and the surrounding brain tissues of the patients were examined by immunohistochemical staining(the two step method).The data were statistically analyzed.Results The results from the immunohistochemistry staining showed that Cx43 and Cx32 were expressed in the epileptogenic lesions and the surrounding brain tissues.The expression of Cx43 in the epileptogenic lesions was increased obviously in comparison with the surrounding brain tissues ( U =4.066,P ＜ 0.001 ).There was no significant difference in the expression of Cx32 between the epileptogenic lesions and the surrounding brain tissues ( U =1.866,P ＞ 0.05 )Conclusion The expression of Cx43 in the epileptogenic focus is increased in comparison with that in the surrounding brain tissues,indicating that GJ plays an important role in the generation and development of epilepsy.There is no significant difference in the expression of Cx32 between the epileptogenic lesions and the surrounding brain tissues,which may be related to the apoptosis of the neurons after multiple seizure attacks.

Objective: To investigate the effect of rat hyperplasia suppressor gene-1(rHSG-1) on the proliferation of aortic vascular smooth muscle cells(VSMCs) from spontaneously hypertensive rats(SHR). Methods:VSMCs were transfected with an adenoviral vector expressing rHSG-1(Ad5rHSG-1). The effect of rHSG-1 on the proliferation of VSMCs was investigated by cell counting, MTT assay and 3H-thymidine incorporation. We also analyzed the cell-cycle using flow cytometry and detected the expression of p27 Kip1 and p21 Cip1 by Western Blot. Results:The proliferation of VSMCs infected with Ad5rHSG-1 was inhibited,a 40% reduction compared with the control group(P

Purpose To study the clinical features,pathological manifestation and immunohistochemical phenotype and improve the diagnosis and treatment of myoepithelial carcinoma in salivary glands.Methods Histomorphology and immunohistochemical phenotype were analyzed after the sections were stained with routine HE and immunohistochemical methods,and the relevant literatures were reviewed.Results The tumours were predominantly composed of pale-stained clear cells.In some cases,plasma-like cells,epithelioid cells and spindle cells were also seen.The cells were arranged in nest,solid or cords.Mitosis was easily seen,cytological atypia was obvious and necrosis existed in 4 cases.The results of immunohistochemical staining showed that CK was expressed in all cases.EMA was expressed in 8 cases.p63 and CK5/6 were expressed in 11 cases.S-100 was expressed in 10 cases.vimentin was expressed in 4 cases.Calponin was expressed in 2 cases.SMA was expressed in one case.The proliferation index of Ki-67 was 5％ to 40％.Conclusion The histological changes of myoepithelial carcinoma cells are diverse,and pathological and immunohistochemical methods are helpful for improving the rate of right diagnosis.Sugery is the main treatment for myoepithelial carcinoma.

Objective To investigate the level of professional commitment of student nurses,and explore the impact of student nurses' role conflict and role ambiguity on their professional commitment.Methods From May to June 2014,totally 320 student nurses from a third-level hospital in Tianjin were recruited in this study.And Role Stress Scale and Nursing Professional Commitment Scale were used in the investigation.Results The total score of role stress of student nurses was (44.29±5.53) scores,and the total score of professional commitment of student nurses was (86.12±14.14) scores.Pearson correlation analysis and multiple linear regression analysis showed that student nurses' role conflict was positively correlated with professional commitment,but their role ambiguity was negatively correlated with professional commitment.Conclusion School and hospital managers should adopt effective measures to relieve student nurses' role ambiguity and guide the correct understanding of role conflict to maintain a stable nursing team.

Objective To investigate the effects of aspirin on the morphology and wall structure of the intracranial aneurysm induced by hemodynamics.Methods Twenty-six SD rats were randomly divided into three groups:a control group,a model group,and an aspirin group.The right common carotid artery,left external carotid artery,and pterygopalatine artery were ligated in order to change the hemodynamics of left internal carotid artery.After 3-month induction,the anterior communicating artery complex were harvested after heart perfusion.The aneurysm-like structure was observed using a scanning electron microscope and was graded.The changes of elastic hyer and smooth muscle cells in the tunica media were detected by pathological examination.Results Aneurysm-like remodeling was observed both in the model group and in the aspirin group,and there was no statistical differences in morphological grade between the 2 groups (P =0.054).Pathological examination showed the folds or loss of the internal elastic lamina and thinned media smooth muscle layer both in the model group and in the aspirin group.The length of thinned media in the model group was significantly higher than that in the aspirin group (173.50 ± 17.62 μm vs.153.50 ± 12.04 μ,m;t=2.964,P=0.008).Conclusions Aspirin can slow down the pathological remodeling of intracranial aneurysm wall,but it cannot completely inhibit the formation of intracranial aneurysm.

Objective To search for lymph node metastasis-associated proteins in human lung squamous carcinoma (hLSC).Methods Laser capture microdissection (LCM) was used to purify the target cells from lung primary tumor and matched lymph node metastatic tumor in hLSC. Two-dimensional gel electrophoresis (2-DE) was performed to separate the total proteins of microdissected tumor cells from lung primary tumor and matched lymph node metastatic tumor. PDQuest software was applied to analyze 2-DE images. Differential protein spots between the two types of tissues were identified by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS). The expression of Rho-GDIα, one of the differential proteins, in the microdissected lung primary tumor cells (LPTC) and matched lymph node metastatic tumor cells (LNMTC) was detected by Western blot. Results In the present study, 2-DE patterns of microdissected LPTC and LNMTC were established, and 22 differential proteins in the above two tissues were identified, of which 14 were down-regulated in LNMTC and 8 were up-regulated in LNMTC.Conclusion The 22 differential proteins may play some roles in the process of lymph node metastasis in hLSC, and the data provide new clues for metastasis-associated biomarker screen and mechanism of hLSC.

OBJECTIVE: To observe the short-term and long-term curative effect of the xenogenic acellular dermal matrix membrane (or joint muscle flap transfer) application used in the 82 cases postoperative tissue shortage repair that after the head neck carcinoma resection. METHOD: To held the 82 cases head neck carcinoma postoperative mucosa shortage repaired after resection by the xenogenic acellular dermal matrix membrane (or joint muscle flap transfer), 65 cases mucosa shortage wound be directly covered by the repair membrane and the other 17 cases mucosa shortage wound be repaired by the tranfered muscle tissue flap with the repair membrane covered; 53 cases underwent additional postoperative radiotherapy between 2-4 weeks and follow-up in 1, 3, 6, 12, 18, 24, 30, 36, 48, 60 months and observed the operation site repair process through the electronic laryngoscope, observed the patients respiration, swallow, phonation function. RESULT: Seventy-seven cases patients operation incision reached I phase healing standard, another 5 cases patients operation incision reached II phase healing standard because of the wound infection and fully-recovered through the local wound drainage,dressing process. All the patients tracheal cannula,the stomach tube be extubated successfully and without the local cicatricial constriction occurred. Seventy-eight cases follow up period reached 1 year including 53 cases who underwent postoperative radiotherapy, 49 cases follow up period reached 3 years including 32 cases who underwent postoperative radiotherapy, 14 cases follow up period reached 5 years including 12 cases who underwent postoperative radiotherapy. The patients with static local lesions discovered no reaction such as exclusion, allergy. CONCLUSION The application of xenogenic acellular dermal matrix membrane (or joint muscle flap transfer used in in the postoperative tissue shortage repair that after the head neck carcinoma resection have several advantage such as comparatively easily implementation, operation safety edge enough,well preserved organ function, comparatively low incidence about the laryngeal stenosis, the short-term and long-term repair effect are all exact.
Acellular Dermis ; Carcinoma, Squamous Cell ; radiotherapy ; surgery ; Female ; Head and Neck Neoplasms ; radiotherapy ; surgery ; Humans ; Male ; Mucous Membrane ; surgery ; Postoperative Period ; Squamous Cell Carcinoma of Head and Neck ; Surgical Flaps ; transplantation ; Wound Healing