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Cheng-Yen Chang,Hsin-Kai Wang,Hong-Jen Chiou,Yi-Hong Chou,Tain-Hsiung Chen,See-Ying Chiou 대한영상의학회 2006 Korean Journal of Radiology Vol.7 No.1
Objective: We wanted to assess the usefulness of four-dimensional (4D) ultrasonography (US), i.e., real-time three-dimensional US, as an adjunct for performing various US-guided interventional procedures in superficial lesions. Materials and Methods: Thirty-three patients were referred for US-guided interventional procedures for superficial lesions, including core biopsy in 19, fineneedle aspiration in eight, therapeutic drug injection in four and needle puncture in two. The procedures were performed under 4D US guidance. We reviewed the pathologic/cytologic results of the core biopsies or needle aspirations, and also the outcomes of drug injection or needle puncture. Results: For all the patients who underwent 4D US-guided core biopsy, the specimens were adequate for making the pathological diagnosis, and specimens were successfully obtained for those patients who underwent 4D US-guided aspiration. The patients treated with 4D US-guided therapeutic drug injection or needle puncture had a good response. No major procedure-related complications occurred. The procedural times were similar to those procedural times with using two-dimensional US. Conclusion: Combining the two dimensional and 4D US techniques aids the physician when performing US-guided interventional procedures for the superficial lesions.
Effect of Impeller Blade Number on Kla in Mechanically Agitated Vessels
Lu Wei Ming,Wu Hong Zhang,Chou Cheng Ying 한국화학공학회 1999 Korean Journal of Chemical Engineering Vol.16 No.5
Effects of impeller blade number on gas dispersion and mass transfer rate were thoroughly investigated for mechanically agitated vessels equipped with 2-, 4-, 6- and 8-straight blades disk turbine impellers. The results show that under the same rotational speed, the impeller with more blades always can disperse gas more effectively, which induces a higher value of $lt;K_La$gt;. However, with the same total power consumption, the 4-blade impeller can obtain a higher $lt;K_La$gt; value than the 6- and 8-blade impellers under a lower gassing rate condition (Q-g$lt;0.5vvm), but if Q_g) exceeds 0.5vvm, the 6-blade impeller will perform better than the 4- and 8- blade impellers. To examine the results obtained from the single impeller systems, the same approach is applied to measure $lt;K_La$gt; values for the triple stage 6-blade impeller system (3×6) and quadruple stage 4-blade impeller system (4×4). From the experimental results, it can be found that the 4×4 system gives higher $lt;K_La$gt; value than the 3×6 system under gas completely dispersed conditions. By correlating $lt;K_La$gt; with n_b, N and V_s, the following correlation can be given as: $lt;K_La$gt; = 0.00119n^(0.62)_bN^(1.56)V^(0.4)_s $lt;K_La$gt; = 0.0297n^(0.1)_b(P_s/V)^(0.34)V^(0.48)_s These two correlations can also be used to evaluate the mass transfer coefficient of each impeller region for the multiple impeller systems and the deviation is always less than 10%.
RESEARCH PAPERS : Effect of Impeller Blade Number on KLa in Mechanically Agitated Vessels
(Wei Ming Lu),(Hong Zhang Wu),(Cheng Ying Chou) 한국화학공학회 1999 Korean Journal of Chemical Engineering Vol.16 No.5
Effects of impeller blade number on gas dispersion and mass transfer rate were thoroughly investigated for mechanically agitated vessels equipped with 2-, 4-, 6- and 8-straight blades disk turbine impellers. The results show that under the same rotational speed, the impeller with more blades always can disperse gas more effectively, which induces a higher value of $lt;K_La$gt;. However, with the same total power consumption, the 4-blade impeller can obtain a higher $lt;K_La$gt; value than the 6- and 8-blade impellers under a lower gassing rate condition (Q-g$lt;0.5vvm), but if Q_g) exceeds 0.5vvm, the 6-blade impeller will perform better than the 4- and 8- blade impellers. To examine the results obtained from the single impeller systems, the same approach is applied to measure $lt;K_La$gt; values for the triple stage 6-blade impeller system (3×6) and quadruple stage 4-blade impeller system (4×4). From the experimental results, it can be found that the 4×4 system gives higher $lt;K_La$gt; value than the 3×6 system under gas completely dispersed conditions. By correlating $lt;K_La$gt; with n_b, N and V_s, the following correlation can be given as: $lt;K_La$gt; = 0.00119n^(0.62)_bN^(1.56)V^(0.4)_s $lt;K_La$gt; = 0.0297n^(0.1)_b(P_s/V)^(0.34)V^(0.48)_s These two correlations can also be used to evaluate the mass transfer coefficient of each impeller region for the multiple impeller systems and the deviation is always less than 10%.
Scaling up the in-hospital hepatitis C virus care cascade in Taiwan
( Chung-feng Huang ),( Pey-fang Wu ),( Ming-lun Yeh ),( Ching-i Huang ),( Po-cheng Liang ),( Cheng-ting Hsu ),( Po-yao Hsu ),( Hung-yin Liu ),( Ying-chou Huang ),( Zu-yau Lin ),( Shinn-cherng Chen ),( 대한간학회 2021 Clinical and Molecular Hepatology(대한간학회지) Vol.27 No.1
Background/Aims: Obstacles exist in facilitating hepatitis C virus (HCV) care cascade. To increase timely and accurate diagnosis, disease awareness and accessibility, in-hospital HCV reflex testing followed by automatic appointments and a late call-back strategy (R.N.A. model) was applied. We aimed to compare the HCV treatment rate of patients treated with this strategy compared to those without. Methods: One hundred and twenty-five anti-HCV seropositive patients who adopted the R.N.A. model in 2020 and another 1,396 controls treated in 2019 were enrolled to compare the gaps in accurate HCV RNA diagnosis to final treatment allocation. Results: The HCV RNA testing rate was significantly higher in patients who received reflex testing than in those without reflex testing (100% vs. 84.8%, P<0.001). When patients were stratified according to the referring outpatient department, a significant improvement in the HCV RNA testing rate was particularly noted in patients from non-hepatology departments (100% vs. 23.3%, P<0.001). The treatment rate in HCV RNA seropositive patients was 83% (83/100) after the adoption of the R.N.A. model, among whom 96.1% and 73.9% of patients were from the hepatology and non-hepatology departments, respectively. Compared to subjects without R.N.A. model application, a significant improvement in the treatment rate was observed for patients from non-hepatology departments (73.9% vs. 27.8%, P=0.001). The application of the R.N.A. model significantly increased the in-hospital HCV treatment uptake from 6.4% to 73.9% for patients from non-hepatology departments (P<0.001). Conclusions: The care cascade increased the treatment uptake and set up a model for enhancing in-hospital HCV elimination. (Clin Mol Hepatol 2021;27:136-143)