ABSTRACT
Stroke has caused a heavy disease burden across the world, and it has become a worldwide public health problem. Several studies have assessed the relationship between psychological and social factors and risk of stroke so far. This paper summarizes the progress in epidemiological research on the relationship between psychological and social factors (depression, psycho-social stress, anxiety, loneliness, psychological distress, social support, social isolation, and social network) and the risk for stroke, the results of these studies were inconsistent. Most studies showed an association between these factors and the incidence of stroke, but there were still some studies showing no such association.
ABSTRACT
Objective To investigate the application of semi-quantitative analysis of dual energy lung perfusion imaging(DEPI)in patients with acute pulmonary embolism(PE)before and after treatment.Methods 25 patients with acute PE diagnosed by dual source CT were recruited consecutively.All of them underwent CT pulmonary angiography(CTPA)and DEPI before and after treatment. Radiologists visually evaluated the PE numbers,its distribution(central or peripheral)and its nature(occlusive or non-occlusive)on CTPA.DEPI visual analysis and semi-quantitative analysis before and after treatment in different types of PE evaluated by CTPA were analyzed statistically.Results Four types of PE(central occlusive PE,central non-occlusive PE,peripheral occlusive PE and peripheral non-occlusive PE)were classified according to embolic sites and the extent of embolization.Comparing to CTPA as a standard reference,the positive rates of DEPI visual analysis were 100.00%,70.54%,87.23%,76.19% before treatment,100.00%, 76.67%,86.67%,77.78% after treatment,respectively.Significant differences were found in central occlusive PE,central non-occlusive PE and peripheral occlusive PE with mean difference of CT values before and after treatment[(70.7 ± 10.1)HU vs(29.8 ± 6.0)HU,P<0.01;(50.1 ± 9.6)HU vs(29.3 ± 7.8)HU,P< 0.01;(53.4 ± 11.4)HU vs(27.4 ± 8.9)HU,P<0.01,respectively].Although(24.5 ± 8.2)HU (after treatment)were lower than(28.5 ± 9.0)HU(before treatment),no significant difference was found in the type of peripheral non-occlusive PE(P> 0.05).Conclusion The combination of CTPA and DEPI can offer more comprehensive information of the acute PE therapeutic evaluation before and after treatment.
ABSTRACT
Objective To analyze the causes and manifestations of non-pulmonary embolism induced perfusion defects (PDs) on dual-energy perfusion imaging (DEPI) using dual source CT.Methods Consecutive 208 patients without pulmonary embolism who underwent DEPI were reviewed retrospectively.The causes of PDs were analyzed by two radiologists, the pulmonary segment numbers, the proportion and the perfusion patterns of each case were recorded and analyzed respectively.Results 1 118 of 3 716 pulmonary segments showed the PDs.Among them, 752(67.26%), 36(3.22%), 308(27.55%) and 22(1.97%) pulmonary segments had PDs due to intra-pulmonary lesions, vascular diseases, artifacts and unidentifiable causes, respectively.In PDs resulted from intra-pulmonary lesions, vascular diseases and unidentifiable causes, three patterns (wedge-shaped, heterogeneous and regionally homogeneous) were identified,and most of those PDs were heterogeneous and regionally homogeneous, which were largely in accordance with the lesions showed on non-contrast enhanced scans.Artifacts included the beam hardening artifacts and artifacts caused by heart beat or diaphragmatic movement.The PDs caused by artifacts usually had particular locations and shapes.Conclusion Understanding of the manifestations and causes of PDs in patients without pulmonary embolism can improve the diagnosis accuracy of pulmonary embolism on DEPI.
ABSTRACT
The history,hardware,imaging principle and technical characteristics of dual-energy CT machine were described.The causes,clinical diagnosis and treatment of urinary calculi were analyzed.Dual-energy CT had its technical characteristics,clinical significance,advantages and practicality expounded in detail when used to determine the components of urinary calculi.
ABSTRACT
Anorectal malformations (ARM)comprise a broad spectrum of congenital disorders that account for 25 ％ of gastrointestinal malformations.Despite numerous technical advances for treatment of ARM,complications such as fecal incontinence and constipation still occur and can greatly deteriorate patients' quality of life.It is recognized that lumbosacral spinal cord anomalies in ARM has been an important factor affecting the fecal function after procedure.Researchers have found that lumbosacral myelodysplasia is the common seen complication of ARM and neural cells decreased in lumbosacral spinal cord by the study on animals and human.Due to numerous factos affecting nerve innervation on annrectus and pelvic floor muscle,this review summarizes the nervous system complications and abnormal intervention of human and rats ARMs.The developments of study on ARM complications and intervention are detailed.Then the new direction of the research about the anorectal malformation nervous system is put forward,and the new strategy of improving the prognosis of anorectal malformation surgery is explored.
ABSTRACT
This paper selects the bag-type infusion sets for single use as samples, which are produced by different manufacturers and based on the ethylene oxide sterilization. The ethylene oxide sterilization residues in different parts of samples are detected by colorimetric analysis. Combined the comparison of the ethylene oxide residues testing results in the different parts of the same sample with the actual situation in clinical use, more reasonable sampling positions are found to detect the ethylene oxide sterilization residues. The result of this experiment will play a guiding role in the detection of the actual samples.
Subject(s)
Disposable Equipment , Equipment Contamination , Ethylene OxideABSTRACT
ObjectiveTo evaluate prognosis and its clinical factors in patients with primary pontine hemorrhage. Methods Patients with primary pontine hemorrhage who were hospitalized in the First Affiliated Hospital of Wenzhou Medical College within 24 hours after stroke onset between April 2007 and April 2009 were registered conscutively. The patients were followed up for one year. Kaplan-Meier methods were used to analyze survival rate. Cox proportional hazards model was used to study risk factors for 1-year mortality. ResultsA total of 41 patients with primary pontine hemorrhage were studied. Their mean age was (63.5 ± 10. 1 ) years.The overall 1-year mortality rate was 61.0％, the median survival time was (80. 0 ±54.4) days (95％ CI 0-186. 64). After one-year follow-up, the mortality rate in patients with primary dorsal pontine hemorrhage( 18.2％ ) was significantly lower than that in patients with primary ventral pontine hemorrhage(72. 7％ ; x2 = 8. 800, P = 0. 003 ). Patients with massive primary pontine hemorrhage had significantly higher mortality rate than patients with dorsal primary pontine hemorrhage( x2 = 8. 927, P =0. 003). The average hematoma volume of the survivor group and mortality group was (3. 043 ± 1. 718) ml and (5. 984 ± 2. 707) ml, respectively, showing statistical significance (t = 3. 661, P = 0. 001 ). Analysis with Cox proportional hazards model showed that the risk factors associated with mortality were hematoma location ( RR = 2. 428, 95 ％ CI 1. 055-5. 587 ), hematoma volume ( RR = 1. 283, 95 ％ CI 1. 044-1. 577 ),GCS score on admission(RR =3. 389, 95％ CI 1. 177-9. 756). Patients with pontine hematomas in dorsal had a significantly better outcome than in other locations.Conclusions The survival and prognosis in primary dorsal pontine hemorrhage are better than with hemorrhaging in other parts of pontine. A significant correlation was observed between poor prognosis and hematoma volume, hematoma location and GCS score on admission.