Case Study embodies the target teaching model with the teacher as the leading guidance and the students as the main part.Making the best design and application will help to develop high-guality medical talents.

Humans ; Neck ; Solitary Fibrous Tumors

Adult ; Anemia, Aplastic ; complications ; surgery ; Female ; Hematopoietic Stem Cell Transplantation ; Hemoglobinuria, Paroxysmal ; complications ; surgery ; Humans

This study reported the protective effects of poly-saccharide sulphate (PSS) on experimental model of myocardial infaction by high positioned double - ligation of the anterior descending left coronary artery in rabbits, and on ischemic injury of myocardium by intraperi-toneal injection of isoprenaline in rats. The results showed that PSS could decrease the infarct sizes of rabbits model expressed by ECG mappingof ∑ST segment, NST and NQ, and reduce the activities of CPK in serum. It also showed that PSS reduced the severity of myocardial necrosis and the activies of CPK in serum of the experimental rats . It suggested that PSS have the protective effects on ischemic injury of myocardium.

Objective To study the biological effects of pSNAV2-hTGF?1 and pSNAV2-hTGF?3 on the reversion of rabbit disc degeneration. Methods Rabbit nucleus pulpous and annulus fibrosus cells were isolated and cultured. The fluorescence labled pSNAV2 were used to detect the transfect rates of rabbit disc cells at first. Then, the pSNAV2-hTGF?1 and pSNAV2-hTGF?3 were transfected into the degenerated rabbit disc cells respectively. The biological effects of hTGF?1 and hTGF?3 on degenerated rabbit disc cells were detected with Western-bloting and 35S detection to analyze and compare the matrix synthesis of the tranfected cells. Results pSNAV2 could transfect degenerated disc cells effectively in the early stages. Both the pSNAV2-hTGF?1 and pSNAV2-hTGF?3 could stimulate the synthesis of collagen Ⅱ and proteoglycan of the rabbit disc cells. For the early stage of degenerated disc cells, the synthesis of collagen Ⅱ and proteoglycan were greater transfected with pSNAV2-hTGF?1 than transfected with pSNAV2-hTGF?3. The pSNAV2-hTGF?1 could promote the degenerated rabbit annulus fibrosus cells to synthesize collagen Ⅰ and pSNAV2-hTGF?3 could promote the degenerated nucleus pulpous cells of later stage to synthesize the collagen Ⅱ. Conclusion Both pSNAV2-hTGF?1 and pSNAV2-hTGF?3 can promote the degenerated rabbit disc cells of early stage to synthesize the matrix. pSNAV2-hTGF?3 can efficently promote the seriously degenerated nucleus pulpous cells to synthesize the collagen Ⅱ.

OBJECTIVE: To study the pathological changes of genioglossus with transmission electron microscope (TEM) in patients with obstructive sleep apnea hypopnea syndrome (OSAHS) dominated by lingual region obstruction, and to explore the role of tongue organizations in the pathogenesis and its clinical significance. METHOD: Thirty-eight cases of genioglossus were collected from the patients received UPPP and partial glossectomy (3060 severe group 15 cases), 6 adult patients without oropharyneal and hypopharyneal obstructive disease received tongue tumor resection or trauma debridement surgery were collected as control group. The features of morphological changes in genioglossus were observed by TEM. RESULT: Under the TEM, in the control group,the muscle fibers of the genioglossus organization arranges regular, mitochondrial shape between muscle was regular; The below 3 kinds of variations existed simultaneously in all genioglossus specimens of all the OSAHS patients. In the mild group, myofibrillar atrophied, arranged sloppily, the gap was increased, localized filaments were edema, connective tissue between muscle bundles was proliferated, mitochondria were swelling, some were spherical, crests were still clear; In the moderate group, myofibrillar obviously atrophied with different diametric sizes and disorderliness, the Z lines were shortened or distorted, part of the myofibrillar ruptured, dissolved or disappeared, the connective tissues between muscle bundles were obviously proliferated, mitochondria were swellen, vacuolar degeneration, crests were vague, shorten and irregulatio; In the severe group, a large number of myofibrillar were fractured, dissolved, disorganized, integrated condensate lumpy, spotty or flake arranged, Z-lines were distorted or disappeared. Mitochondria were sizes, showed vacuolar degeneration, crests were disappeared, some changes were flocculent, mitochondria accumulation phenomenon was visible in some samples. Moreover, with the AHI increased, the occurence ratio of mild changes was decreased while severe changes occurence ratio increased. CONCLUSION The changes of genioglossus and mitochondrial in OSAHS patients is a continuous, progressive process, moverover, with the aggravation of OSAHS, genioglossus histopathological changes had gradually worsening tendency.
Adult ; Glossectomy ; Humans ; Mitochondria ; Muscle, Skeletal ; pathology ; ultrastructure ; Sleep Apnea, Obstructive ; complications ; Tongue ; pathology

Diagnostics is a very important course as a bridge connecting the basic course with the clinical course. There are many problems which are very difficult to resolve in the traditional diagnostics teaching. If we widely use computer human patient simulator and establish clinical skill teaching mode, then we will greatly improve the quality and efficiency of the diagnostics teaching.

Objectives To analyze the risk factors associated with infant wheezing in Zhongshan city. Methods A multi-center, large sample of case-control study was applied and the data related to risk factors was collected by questionnaire survey. T test and chi-square test were firstly used for univariate analysis, and then the multivariate stepwise logistic regression was used to analyze the independent risk factors associated with infant wheezing. Results A total of nine factors were found rele-vant to infant wheezing by univariate analysis including parental allergic history, way of birth, respiratory syncytial virus infec-tion, Mycoplasma pneumoniae infection, personal allergic history, like crying, parents have constant disagreements, home near the road, and factory around (P<0.05). Parental allergic history (OR=3.441, 95%CI:1.914-6.186, P<0.001), respiratory syncy-tial virus infection (OR=2.910, 95%CI:1.793-4.723, P<0.001), Mycoplasma pneumoniae infection (OR=2.277,95%CI:1.110-4.667, P=0.025), home near the road (OR=2.036, 95%CI:1.280-3.239, P=0.003) and like crying (OR=1.521, 95%CI:1.049-2.206, P=0.027) were approved to be the independent risk factors of infant wheezing in ZhongShan. Conclusions Nine factors have relationship with infant wheezing, including parental allergic history, respiratory syncytial virus infection, Mycoplasma pneumoniae infection, home near the road, like crying, personal allergic history, and that the former five factors are the indepen-dent risk factors.

Objective To study the influence of mild hypothermia on blood glucose and blood lactate and intracranial pressure (ICP) of the patients with anterior circulation brain infarction (massive hemispheric infarction) and evaluate its clinical effects.Methods All 30 patients with massive hemispheric infarction within the first 24 hours from stroke onset were randomly divided into the control group and the hypothermia group (15 patients respectively). To the latter group, mild hypothermia (32~34℃)was initiated and ICP values were measured in the same time. Rewarming was begun after hypothermic therapy lasted for 20~49(32?9)hours. In both groups, the blood glucose and blood lactate were measured at the time of admission, the second day and the fourth day. According to Neurological Deficit Scale score, the prognosis was evaluated at the time of admission and 4 weeks later.Results In hypothermia group, the initial ICP was (14.2?4.2) mm Hg, which was significantly reduced under hypothermia to (11.3?2.8) mm Hg(P

OBJECTIVETo explore the working mechanism and age-related change of the conflict processing system of the frontal cortex.

METHODSFifteen normal elderly people and 15 youth were performed a modified Eriksen flanker paradigm, while event-related potential (ERPs), which include 32 systerm electroencephalography, reaction time and correct rate were recorded.

RESULTSThe elderly group showed a distinct effect of reaction time and effect of conflict in the respond level compared with the youth group. The elderly group had a longer time window of N380 and same amplitude as the youth group. Low resolution brain electromagnetic tomography (LORETA) showed the bilateral temporal lobe and the dorsolateral prefrontal cortex (especially right) were activated in the youth group, while the left temporal lobe, the left dorsolateral prefrontal cortex and left medial frontal gyrus were activated in the elderly group.

CONCLUSIONWhen conflict stimuli existed in the response level, old people showed frontal interference control hypofunction. N380 reflected the activation of the left dorsolateral prefrontal cortex and the left temporal lobe during response selection and executive control processing in older people.

Adolescent ; Aged ; Aging ; Electroencephalography ; Evoked Potentials ; Frontal Lobe ; physiology ; Humans ; Prefrontal Cortex ; physiology ; Reaction Time ; Temporal Lobe ; physiology