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Single and double contrast arthrographic techniques were compared in 951 patinets with suspected meniscal injuries. Exploratory surgery of the knee was performed in 384 of these patients and good clinical follow-up was obtained in 135 patients. In the latter two groups of patients, the single contrast technique was 97% accurate in assessing the medial meniscus and 96% accurate in assessing the lateral meniscus. Double contrast arthrography was 97% accurate in assessing the medial meniscus and 93% accurate in assessing the lateral meniscus. Numerical differences in the results from the two techniques were not statistically significant. Therefore both techniques can be considered equally effective diagnostically. 相似文献
103.
New object onsets reduce conscious access to unattended targets 总被引:2,自引:0,他引:2
Attention to a visual target can affect perception of a subsequent target for half a second, increasing its sensitivity to backward masking (the attentional blink, AB). In 6 studies, we compared the AB when the second target and its mask had a common onset and when the mask appeared after the target. The results indicate that common-onset masks do not produce large ABs even when there is a feature change or an interruption of the mask after the target but do produce a large AB if the location of the mask is changed. The data suggest that new object onsets reduce conscious access to unattended targets. 相似文献
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Detailed per-oral small bowel examination vs. enteroclysis. Part II: Radiographic accuracy 总被引:5,自引:0,他引:5
Accuracy of the detailed per-oral small bowel series and enteroclysis was compared in 134 patients known to have (or not have) disease of the small bowel. Overall sensitivity of the per-oral examination was 92% and specificity 94%, compared to 94% and 89%, respectively, for enteroclysis. There was no difference between the two in Crohn disease, adhesions, and metastatic disease; however, enteroclysis was thought to be more effective in delineating peritoneal adhesions in patients with obstruction. The authors conclude that while the per-oral study and enteroclysis are equally valid methods of examining the small bowel, the per-oral study is preferable as a screening examination because it requires less time, has fewer side effects, and involves a lower radiation exposure. 相似文献
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Chemically modified hyaluronic acid (HA)-gelatin hydrogels have been documented to support attachment, growth, and proliferation of fibroblasts in vitro and to facilitate repair and engineering of tissues in vivo. The objective of this study was to determine the optimal composition of a synthetic extracellular matrix (sECM) that would promote wound repair and induce tissue regeneration in a rabbit vocal fold wound healing model. The sECM was formed using a thiol-modified semisynthetic glycosaminoglycan (GAG) derived of HA (Carbylan-SX) mixed with a thiolated gelatin derivative, co-cross-linked with poly(ethylene glycol) diacrylate to form Carbylan-GSX. Forty rabbits underwent vocal fold biopsy bilaterally. Rabbits were treated with Carbylan-SX, which lacks gelatin, or with Carbylan-GSX with different gelatin concentrations (2.5%, 5%, 10%, and 20%) via unilateral injection of the vocal fold at the time of biopsy. Saline was injected in the contralateral vocal fold as a control. Three weeks after biopsy and injection, animals were euthanized and mRNA levels of procollagen type 1, fibronectin, transforming growth factor beta 1 (TGF-beta1), fibromodulin, HA synthase 2, hyaluronidase 2, and tissue biomechanics were evaluated. Hyaluronidase mRNA levels were found to be significantly elevated in for Carbylan-GSX 20% w/w gelatin compared to controls. Both Carbylan-SX and Carbylan-GSX significantly improved tissue elasticity and viscosity. Carbylan-GSX containing 5% w/w gelatin showed the most promise as a scaffold material for vocal fold tissue regeneration. 相似文献
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Nicky McCreesh Lisa G Johnston Andrew Copas Pam Sonnenberg Janet Seeley Richard J Hayes Simon DW Frost Richard G White 《International journal of health geographics》2011,10(1):1-12