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ObjectiveTo evaluate the efficacy of newly designed covered and non-covered coated colorectal stents for colonic decompression.Materials and MethodsTwenty-six patients, (15 palliative cases and 11 preoperative) underwent treatment for the relief of colorectal obstruction using metallic stents positioned under fluoroscopic guidance. In 24 of the 26, primary colorectal carcinoma was diagnosed, and in the remaining two, recurrent colorectal carcinoma. Twenty-one patients were randomly selected to receive either a type A or type B stent; for the remaining five, type C was used. Type A, an uncovered nitinol wire stent, was lightly coated to ensure structural integrity. Type B (flare type) and C (shoulder type) stents were polyurethane covered and their diameter was 24 and 26mm, respectively. The rates of technical success, clinical success, and complications were analyzed using the chi-square test, and to analyse the mean period of patency, the Kaplan-Meier method was used.ResultsThirty of 31 attempted placements in 26 patients were successful, with a technical success rate of 96.8% (30/31) and a clinical success rate of 80.0% (24/30). After clinically successful stent placement, bowel decompression occurred within 1-4 (mean, 1.58 ± 0.9) days. Five of six clinical failures involved stent migration and one stent did not expand after successful placement. In the preoperative group, 11 stents, one of which migrated, were placed in ten patients, in all of whom bowel preparation was successful. In the palliative group, 19 stents were placed in 15 patients. The mean period of patency was 96.25 ± 105.12 days: 146.25 ± 112.93 for type-A, 78.82 ± 112.26 for type-B, and 94.25 ± 84.21 for type-C. Complications associated with this procedure were migration (n=6, 20%), pain (n=4, 13.3%), minor bleeding (n=5, 16.7%), incomplete expansion (n=1, 3.3%), and tumor ingrowth (n=1, 3.3%). The migration rate was significantly higher in the type-B group than in other groups (p=0.038).ConclusionNewly designed covered and non-covered metallic stents of a larger diameter are effective for the treatment of colorectal obstruction. The migration rate of covered stents with flaring is higher than that of other types. For evaluation of the ideal stent configuration for the relief of colorectal obstruction, a clinical study involving a larger patient group is warranted.

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Resistance indices of the poststenotic kidney above 0.55 and a negative renin ratio can predict a poor outcome concerning arterial blood pressure response after restoration of renal blood flow for unilateral renal artery stenosis.

Background and Objectives Facial rejuvenation via mesotherapy using a new polycomponent formulation was employed to improve skin texture. In this study, we evaluated the rejuvenating effects of a new polycomponent formulation through mesotherapy using a microneedle therapy system (MTS). Materials and Methods Twenty patients underwent a series of facial procedures, including three sessions performed at 2-week intervals and two sessions at 4-week intervals. Subsequently, 3 mL of new polycomponent formulation was applied to the entire face and MTS was used. Patient satisfaction scoring was conducted by three plastic surgeons who evaluated the improvement of fine wrinkles, skin tightness, hydration, and sweat pore size. In addition, photographs of the patients were taken at each visit and 2 months after the last treatment session. Results The patients were satisfied with the therapeutic outcomes. The scores of the surgeons for the improvement of fine wrinkles, skin tightness, hydration, and sweat pore size were high. Conclusion Minimally invasive mesotherapy using a new polycomponent formulation can improve the clinical appearance of facial skin. However, a largerscale and well-controlled investigation of the clinical efficacy and safety of this technique is needed to confirm these findings.

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