ABSTRACT
Objective To investigate whether different initial planes have an effect on examination of the fetal heart by four-dimensional ultrasound with spatiotemporal image correlation (STIC).Methods The standard examination planes of fetal heart were rendered using the heart volume data which were acquired in different initial planes with STIC,then these rendered planes were compared and scored.Results① At the four-chamber initial planes,the reconstruction rate of longitudinal planes of the aortic arch (46.27%) and the pulmonary artery (49.25%) were poor,in addition,the reconstruction showed low quality,and the average scores were 1.366 and 1.403,respectively.② At the left outflow-tract initial planes,reconstruction rates of all planes were above 75%,and there was no statistical difference(P=0.169).Each reconstruction plane had good score,even if the scores of longitudinal planes of the aortic arch/pulmonary artery were low,whose scores reached 1.936 and 2.051,respectively.③ At the initial longitudinal planes of the aortic arch,the reconstruction rate (96.67%) and average reconstruction score (2.617) of longitudinal planes of the pulmonary artery were obviously higher than those of other planes.④ Compared with different initial planes,volume data acquired from left outflow-tract initial planes could lead to high-quality reconstructed planes of all standard examination planes.While four-chamber initial planes acquired high-quality standard examination planes except longitudinal planes of the aortic arch and pulmonary artery.Volume data from initial longitudinal plane of the aortic arch acquired low-quality standard examination planes except longitudinal planes of the aortic arch and longitudinal plane of the pulmonary artery.Conclusions With STIC,sonographers can not only save the volume data for off-line analysis and remote consultation but also choose the better initial planes for themselves during the examination of fetal hearts.
ABSTRACT
Objective To observe the clinical effects on prevention of alveolar bone absorption by site preservation after tooth extraction due to periodontitis.Methods The experimental group consisted of 40 patients with 45 extracted teeth due to periodontitis.The fresh sockets were immediately grafted and filled with Bio-oss collagen and Bio-Gide after minimally invasive tooth extraction,while 40 teeth of control group were only treated with cotton balls bitten tightly over the socket for half an hour.Two groups were observed for changes in alveolar bone density by X-ray and cone beam CT (CBCT)after 6 months.Results There were the wound healing and no infection in extraction site of all patients with or without site preservation operation.The gingiva of extraction site was pink and tough in all groups.The alveolar bone loss in regular extraction patients significantly increased in horizontal and vertical aspects by X-ray and CBCT,while site preservation improved the alveolar bone defects (P<0.05).After site preservation for 6 months,CBCT analysis showed that the density of new alveolar bone markedly enhanced compared with regular extraction group.Conclusion The technique of site preservation after tooth extraction due to periodontitis is a method which can prevent and reduce disuse atrophy absorption of the alveolar ridge so that the height and width of the alveolar bone can meet aesthetic requirements.
ABSTRACT
Objective To investigate the clinical characteristics and prevalent features of an influenza erupting prevalence.Methods All of 653 patients with an erupting influenza were enrolled in the study from May 29,2003 to July 3,2003. The data included clinic manifestations and etiology. The retrospective study was used to evaluate the clinical and prevalent features. Results All patients consisted of 392 boys and 261 girls aged 5~17 years(mean 11.5 years),who were all students in middle school or primary school. Most of the patients had no typical symptoms including chill(2.45%),headache(30.00%),tiredness(10.87%)and the aching in whole body(4.44%),whereas fever,faucial inflammation and lymphatic follicular hyperplasia of the faucial posterior wall were the most common among these patients,accounting for 100%,60.03%,64.78% respectively. There were 98 patients whose peripheral leukocyte amounts were increased,most happening on the 6 ~7 th day from the onset(75.51%)following the fever on the 5~6 th day(80.6%). Detection of serum double virus-antigen indicated that influenza virus antibody increased more than 4-fold,as well as parainfluenza virus and adenovirus. Even in minority patients,there were several kinds of virus antibody raised 4-fold at the same time. We applied antivirus allopathy associated with the Chinese traditional medicine such as injection of shuanghuanglian or yuxingcao,plus the effectual antibiotics when necessary . All of the patients were cured and no sequelae. Conclusion Sometimes the influenza is prevalent only in some special crowds and has no typical symptoms such as chill,headache,tiredness and the aching in whole body.The antibiotics should be used in time after the synthetic treatment has no effect,when the patient has the onset for more than 5 days and has the fever for more than 4 days.