The relationship between medical practitioners and padtients always changes with time and this shift becomes quite striking nowadays.The characteristics and underlying reasons of this trend are expounded from such aspects as the changes in medical service system,the alteration in definitions of medical practitioners and patients, the advent of market economy.It is precondition and guarantee of handling the relationship properly to consummate relevant laws and codes,establish medical insurance institution,classify hospitals and set moral restraint for both medical practitioners and patients.

Objective To study the effect of myocardial ischemic preconditioning on activity of ATPase and creatine kinase(CK) in high blood fat rat. Methods High blood fat rat mode was established from SD rats.The rats were randomly divided into three groups: ischemic preconditioning(IPC), ischemic/reperfusion(I/R) and control group.The activity of CK in coronary outflow,the activity of malonyldialdehyde(MDA),superoxide dismutase(SOD),glutathione perodxidase(GSH-Px) and ATPase in myocardium were dectected. Results CK and MDA were significantly less in IPC group than those in I/R group.In IPC group,the activity of SOD,GSH-Px,Na~(+)-K~(+)-ATPase,Ca~(2+)-ATPase and Ca~(2+)-Mg~(2+)-ATPase were much higher than those in I/R group. Conclusion Myocardial ischemic preconditioning can protect high blood fat rat from ischemic/reperfusion injury.

It was believed that there were only two patterns of cell death named after necrosis and apoptosis in the past.With the progress of research,scholars have found that there also existed other cell death patterns.However,the mechanisms and relationships between cell death patterns are still unclear,especially in the neuronal cell death.This review focuses on the cell death patterns and their relationships during ischemic stroke,in order to provide the theoretical basis and new ideas for the further study of neuronal cell death,and for the treatment of ischemic stroke.

OBJECTIVE: To explore the feasible monitoring techniques for the buried free flap. METHOD: Buried free flaps in reconstruction were monitored using combined monitoring techniques in five cases of advanced hypopharyngeal cancer The monitoring effects were analyzed retrospectively. RESULT: The operations were carried out successfully and all the five patients got primary healing of incision without vascular crisis. Four patients need combined monitoring techniques to confirm the microcirculatory results of the buried free flap. CONCLUSION Application of Doppler combined with flap island was feasible on monitoring the blood supply of post-operative buried free flap, it is a good monitoring technique.
Aged ; Carcinoma, Squamous Cell ; diagnostic imaging ; pathology ; surgery ; Free Tissue Flaps ; blood supply ; Head and Neck Neoplasms ; diagnostic imaging ; pathology ; surgery ; Humans ; Hypopharyngeal Neoplasms ; diagnostic imaging ; pathology ; surgery ; Hypopharynx ; Male ; Middle Aged ; Postoperative Period ; Retrospective Studies ; Squamous Cell Carcinoma of Head and Neck ; Surgical Flaps ; blood supply ; Ultrasonography, Doppler

Aged ; Carcinoma, Squamous Cell ; pathology ; surgery ; Cholecystectomy ; Gallbladder Neoplasms ; pathology ; surgery ; Humans ; Male

Antigens, CD ; metabolism ; Antigens, Differentiation, Myelomonocytic ; metabolism ; Face ; microbiology ; Female ; Humans ; Middle Aged ; Mycobacterium avium Complex ; isolation & purification ; Mycobacterium avium-intracellulare Infection ; metabolism ; microbiology ; pathology ; Nasal Cavity ; microbiology ; Nose Diseases ; metabolism ; microbiology ; pathology ; Vimentin ; metabolism

Objective To evaluate the predictive values of ABCD,ABCD2 ,SPI-Ⅱ and ESSEN score models for the patients with high-risk transient ischemic attack (TIA)to develop to cerebral infarction in short and long term. Methods The ABCD, ABCD2 , SPI-Ⅱ and ESSEN scores of 235 cases of TIA patients were retrospectively analyzed.The incidence of cerebral infarction was followed up for 7 d and 1 year, and the receiver operating characteristic curve (ROC)was drawn to calculate the area under curve (AUC)to assess the accuracy of the score models,and compared with the original model and the relative risk (RR)value was calculated.Results The 7 d-incidence and 1 year-incidence of cerebral infarction in the 235 TIA patients were 9.36 % and 20.43%.The AUC of ABCD,ABCD2 ,SPI-Ⅱ and ESSEN models for 7 d were 0.70,0.74,0.67,and 0.62.The AUC of 1 year were 0.62,0.62,0.64,and 0.65.Compared with the orginal models,the RRs for 7 d of ABCD score model of the TIA patients in low,middle,and high risk groups were 0.09,0.92,and 0.72;the RRs of ABCD2 score model were 0.49,0.59,and 0.65;the RRs of SPI-Ⅱ score model were 0.58,0.87,and 0.55;the RRs of ESSEN score model were 0.11,0.18,and 0.55.Conclusion ABCD,ABCD2 ,SPI-Ⅱ and ESSEN score models can be used to assess the risk of cerebral infarction after TIA in Chinese population.The ABCD2 score model is of great value for short-term risk prediction,and the ESSEN score model is more value for long-term risk prediction.

Objective To develop an online organ doses reporting software VirtualDose-IR, which can compute the radiation doses and provide an easy access to evaluation and control of patients ′radiation doses.Methods Monte Carlo method was applied to simulating various interventional radiology ( IR) processes , which included various parameters such as different patient models at different ages and with different weights , different projection angles and regions of interest , and other parameters .All of the dose data was acquired and then integrated into a database , and displayed with hyper text markup language (HTML), so only a web browser was necessary for users .Results A web-based software that reports organ doses for patients under IR progress was developed .The organ doses assessed with VirtualDose-IR were compared with other experiment and simulation data , and the results were basically consistent with each other .Conclusions VirtualDose-IR is a easy and efficient method to assess patients′radiation doses of IR.

Chondroblastoma ; pathology ; Chondrosarcoma ; diagnostic imaging ; pathology ; Chondrosarcoma, Mesenchymal ; pathology ; Diagnosis, Differential ; Female ; Hamartoma ; pathology ; Humans ; Lung Neoplasms ; diagnostic imaging ; pathology ; Middle Aged ; Radiography

OBJECTIVESTo block the synthesis of ryanodine receptor 2 (RyR2) in myocardial cells by RNA interference and to investigate its biological impact on ischemia-reperfusion (I/R) in rat myocardial cells.

METHODSRat myocardial cells were isolated and cultured for an I/R model in vitro. RNA interference technique was used to block the synthesis of RyR2 in myocardial cells. Changes of LDH level, apoptosis, RyR2 mRNA expression and cytosolic Ca(2+) concentration were analyzed accordingly.

RESULTSMyocardial cells after I/R manipolation were severely injuried (LDH leakage, 125 IU/L vs 12 IU/L, P < 0.05), apoptosis (60.1% vs 5.5%, P < 0.05), significant cytosolic Ca(2+) overload (21.2 vs 7.6, P < 0.05) and remarkable mitochondrial membrane potential loss (37.2 vs 85.1, P < 0.05). However, no visible change of RyR2 was observed (20.1 vs 22.7, P > 0.05). Pre-treatment with RyR2 specified siRNA demonstrated suppressed expression of RyR2 (6.8 vs 20.1, P < 0.05), increased mitochondrial membrane potential (55.8 vs 37.2, P < 0.05), attenuated cytosolic Ca(2+) overload (8.6 vs 21.2) and cellular apoptosis (31.2% vs 60.1%, P < 0.05).

CONCLUSIONRyR2 gene silencing enables to protect myocardial cells from I/R injury in vitro.

Animals ; Apoptosis ; drug effects ; genetics ; Cells, Cultured ; Gene Silencing ; immunology ; physiology ; Membrane Potential, Mitochondrial ; drug effects ; immunology ; Myocardial Reperfusion Injury ; immunology ; pathology ; Myocytes, Cardiac ; drug effects ; pathology ; Oxygen ; metabolism ; RNA Interference ; RNA, Small Interfering ; pharmacology ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury ; immunology ; pathology ; Ryanodine Receptor Calcium Release Channel ; drug effects ; genetics