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Jong Hyouk Yun,Gyoo-Sik Jung 대한영상의학회 2023 대한영상의학회지 Vol.84 No.3
Purpose To assess the outcomes of single-stage surgery following fluoroscopic stent placement for malignant colorectal obstruction. Materials and Methods This retrospective study included 46 patients (28 male and 18 female; mean age, 67.2 years) who had undergone fluoroscopic stent placement followed by laparoscopic resection (n = 31) or open surgery (n = 15) for malignant colorectal obstruction. The surgical outcomes were analyzed and compared. After a mean follow-up of 38.9 months, the recurrence-free and overall survival were estimated, and prognostic factors were evaluated. Results The mean interval between stent placement and surgery was 10.2 days. Primary anastomosis was possible in all patients. The mean postoperative length of hospitalization was 11.0 days. Bowel perforation was detected in six patients (13.0%). During the follow-up, ten patients (21.7%) developed recurrence; these included five of the six patients with bowel perforation. Bowel perforation had a significant effect on recurrence-free survival (p = 0.010). Conclusion Single-stage surgery following fluoroscopic stent placement may be effective for treating malignant colorectal obstruction. Stent-related bowel perforation is a significant predictive factor for tumor recurrence.
Dong-Hyouk Jang,Ha-Jung Sung,Won Jun Han,Yang Joong Kim,Sang Yeoung Yoon,Sang Yong Kim,Jae-Hwang Jeong,Jin-Joo Hue,Sang Yoon Nam,Young Won Yun,Beom Jun Lee,Jong-Soo Kim 한국실험동물학회 2009 Laboratory Animal Research Vol.25 No.3
This study was carried out to assess the potential of intranasal administration of ondansetron (a 5-HT₃ receptor antagonist, which antagonize the acute emetic response) in preventing cisplatin-induced emesis in the ferret. After intranasal administration of ondansetron at doses of 0.3 and 0.6 ㎎/㎏, the peak plasma concentrations (Cmax) were 38 and 66.7 ng/mL, and attained at 13 and 23 min (Tmax) respectively. The intravenous (0.3 ㎎/㎏) and intranasal (0.6 ㎎/㎏) administrations of ondansetron significantly delayed the latency time to the first retching and vomiting. In acute phase of emesis during 24 hr, the number of vomits and retches were significantly reduced both in intravenous and intranasal administration groups. In delayed emesis (24-72 hr), intranasal administration of ondansetron at a higher dose of 0.6 ㎎/㎏ or intravenous injection of 0.3 ㎎/㎏ significantly reduced retching but not vomiting. Intranasal ondansetron, administered as 0.6 ㎎/㎏ dose, provided potency in antiemetic control comparable to intravenous ondansetron (0.3 ㎎/㎏) in cisplatin-induced acute emesis, without well known side effects when injected via intravenously. These results suggest that intranasal administration of ondansetron can be an effective substitute for intravenous administration for the prevention of cisplatin-induced acute emesis.
Identification of subtypes of refractory asthma in Korean patients by cluster analysis.
Jang, An Soo,Kwon, Hyouk-Soo,Cho, You Sook,Bae, Yun Jeong,Kim, Tae Bum,Park, Jong Sook,Park, Sung Woo,Uh, Soo-Taek,Choi, Jae-Sung,Kim, Yong-Hoon,Hwang, Hyeon-Kyu,Moon, Hee-Bom,Park, Choon Sik Springer International 2013 Lung Vol.191 No.1
<P>Refractory asthma, a subtype of asthma with uncontrolled symptoms despite antiasthma medications, is a heterogeneous syndrome with variable clinical features, presumably different etiologies, and pathophysiological mechanisms. The heterogeneity of refractory asthma, however, is poorly understood. We aimed to characterize refractory asthma and to improve our understanding of the heterogeneity of refractory asthma patients. We identified refractory asthma patients (n = 96) as defined by the American Thoracic Society's criteria from a cohort of Korean asthma patients (n = 2,187). Then, cluster analysis was conducted to classify subtypes of refractory asthma. Among the study group, 4.4 % (n = 96) of all asthma patients had refractory asthma. Cluster analysis identified four distinct groups of refractory asthma. Age at onset was younger in clusters 1 and 2 than in clusters 3 and 4. Patients in cluster 1 had the most well-preserved pulmonary function; patients in cluster 2 had a female predominance and the most severe airway obstruction; patients in cluster 3 were mostly female and had the most enhanced bronchial hyperresponsiveness; and patients in cluster 4 were most male and tended to be cigarette smokers. The current results suggest that refractory asthma is a heterogeneous syndrome and could be classified into four subtypes. Underlying pathogenesis and therapeutic approaches may differ for the different subtypes and further research is needed.</P>
Hyun Young Choi,Gyoo-Sik Jung,Hee Kang,Ye Na Kim,Hyung Hwan Moon,Jong Hyouk Yun 대한영상의학회 2022 대한영상의학회지 Vol.83 No.3
Purpose To evaluate the effectiveness of the transradial artery approach (TRA) for treating malfunctioning arteriovenous fistulas (AVFs) in patients on hemodialysis. Materials and Methods A retrospective analysis was conducted in this single-center study of TRA endovascular procedures in 73 patients (43 male and 30 female; mean age of 67.4 years (range, 42–92 years) with malfunctioning AVFs, between January 2008 and April 2019. Patients’ baseline and lesion characteristics, technical and clinical success, and complications were evaluated, and functional patency was analyzed using the Kaplan-Meier method. Results Radial artery approaches were successful in all patients. Angioplasty performed using the TRA achieved technical and clinical success rates of 98.6%(72/73) and 91.7%(67/73), respectively. The median primary patency time was 18.8 ± 15.9 months. The primary functional patency rates at 3, 6, and 12 months were 82.1%, 68.6%, and 63.9%, respectively. There were no major complications or adverse events, such as hand ischemia, related to the radial artery approach. Conclusion In selected cases, the TRA can be used complementary to the transvenous approach to treat malfunctioning AVFs.
Hee Jeong Yu,Jung Gu Park,Gyoo Sik Jung,Kwang Il Seo,Hyun Joon Park,Jong Hyouk Yun 대한영상의학회 2023 대한영상의학회지 Vol.84 No.6
Purpose To evaluate the factors that predict symptomatic dislodgement of a percutaneous transhepatic biliary drainage (PTBD) catheter in patients with malignant biliary obstruction. Materials and Methods This retrospective study included 572 patients with malignant biliary obstruction who underwent 733 PTBD catheter insertions between January 2010 and February 2015. The duration of catheter placement, approach site, location of the catheter tip, insertion angle, presence of a closed-loop pigtail, and tube diameter were evaluated. Results During the follow-up period, 224 PTBD catheter dislodgements (30.56%) were observed in 157 patients. Among them, 146 (19.92%) were symptomatic. The mean duration from catheter insertion until dislodgement was 32 days (range: 1–233 days). Male (odds ratio [OR]: 1.636, 95% confidence interval [CI]: 1.131–2.367, p = 0.009), right-sided approach (OR: 1.567, 95% CI: 1.080–2.274, p = 0.018), increased insertion angle (OR: 1.015, 95% CI: 1.005–1.026, p = 0.005), and incomplete closed-loop pigtail formation (OR: 1.672, 95% CI: 1.098–2.545, p = 0.016) were independent factors predictive of symptomatic dislodgement of a PTBD catheter. Conclusion Factors predictive of symptomatic catheter dislodgement included male sex, a right-sided approach, increased insertion angle, and incomplete closed-loop pigtail formation.