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Ortiz-Gómez Tamin,Toledano Paula,Gomez Andrea C.,López María,Alonso Carla Andrea,Ruiz Joaquim,Lagos José,Sáenz Yolanda 대한감염학회 2023 Infection and Chemotherapy Vol.55 No.2
Stenotrophomonas maltophilia is an opportunistic pathogen, often associated with nosocomial infections. Ten S. maltophilia were isolated from clinical samples during the period January 2021 and June 2022. Eight (80%) patients had cancer as a background disease and 2 patients had coronavirus disease 2019. A fatal outcome was recorded in 4 cases (40% of patients). All the isolates were susceptible to minocycline and levofloxacin. Trimethoprim/sulfamethoxazole and ceftazidime resistance rates were 20% and 40% respectively. Eight different patterns were observed by Pulsed-Field Gel Electrophoresis, only two isolates being clonally identical. The isolation of S. maltophilia in clinical settings requires the implementation of infection prevention measures.
Performance of the cobas u 701 Analyzer in Urinary Tract Infection Screening
Victoria Ortiz de la Tabla,,Gregoria Gázquez,Ana Infante,Coral Martin,Fernando Buñuel,Félix Gutiérrez 대한진단검사의학회 2019 Annals of Laboratory Medicine Vol.39 No.5
Background: Negative urine cultures to rule out urinary tract infections (UTI) generate a considerable laboratory workload; thus, a rapid screening test is desirable. We evaluated the performance of a new automated microscopy analyzer, cobas u 701 (Roche Diagnostics International, Rotkreuz, Switzerland) for the screening of UTI, and developed a rule-out strategy to reduce the number of samples requiring culture. We also assessed squamous epithelial cell (SEC) count as a predictor of culture contamination. Methods: In total, 1,604 urine samples from outpatients were analyzed with cobas u 701 and culture. Bacterial (BAC) and white blood cell (WBC) counts were used for sample interpretation. To determine a useful cut-off point to predict negative cultures, we selected the highest sensitivity and specificity values obtained from ROC curves. Diagnostic accuracy by age and gender was evaluated. Results: Urine culture showed growth of ≥104 colony forming units (CFU)/mL in 256 samples (16.0%). The highest sensitivity (91.8%) and specificity (68.4%) were obtained for cut-off points of 119 BAC/μL and 22 WBC/μL. The combination of BAC and WBC improved the performance of the rule-out strategy with a low rate of false-negative results (1.5%) and a high negative predictive value (NPV, 97.3%). Fifty-seven percent of the samples would not have required culture. SEC count was a poor predictor of culture contamination. Conclusions: cobas u 701 can substantially reduce the number of urine samples requiring culture, with a low false-negative rate and a high NPV.
Flow Diverter Treatment for Non-Ruptured Carotid Aneurysms: Efficacy and Safety
López-Callejas Orlando,Ortiz-Giraldo Andres F,Vera Daniela D,Ramirez-Rojas Diego A,Villamizar-Barahona Ana B,Ferreira-Prada Carlos A.,Galvis Melquizidel,Vargas-Pérez Oliverio,Serrano-Gómez Sergio,Reye 대한신경중재치료의학회 2023 Neurointervention Vol.18 No.1
Purpose: Internal carotid artery (ICA) aneurysm treatment with a flow diverter (FD) has shown an adequate efficacy and safety profile, presenting high complete occlusion or near occlusion rates with low complications during follow-up. The purpose of this study was to evaluate the efficacy and safety of FD treatment in non-ruptured internal carotid aneurysms.Materials and Methods: This is a retrospective, single-center, observational study evaluating patients diagnosed with unruptured ICA aneurysms treated with an FD between January 1, 2014, and January 1, 2020. We analyzed an anonymized database. The primary effectiveness endpoint was complete occlusion (O’Kelly–Marotta D, OKM-D) of the target aneurysm through 1-year follow-up. The safety endpoint was the evaluation of modified Rankin Scale (mRS) 90 days after treatment, considering a favorable outcome an mRS 0-2.Results: A total of 106 patients were treated with an FD, 91.5% were women; the mean follow- up was 427.2±144.8 days. Technical success was achieved in 105 cases (99.1%). All patients included had 1-year follow-up digital subtraction angiography control; 78 patients (73.6%) completed the primary efficacy endpoint by achieving total occlusion (OKM-D). Giant aneurysms had a higher risk of not achieving complete occlusion (risk ratio, 3.07; 95% confidence interval, 1.70 - 5.54]). The safety endpoint of mRS 0-2 at 90 days was accomplished in 103 patients (97.2%).Conclusion: Treatment of unruptured ICA aneurysms with an FD showed high 1-year total occlusion results, with very low morbidity and mortality complications.
Enrique Coss-Adame,Janette Furuzawa-Carballeda,Andric C Perez-Ortiz,Ana López-Ruiz,Miguel A Valdovinos,Josué Sánchez-Gómez,José Peralta-Figueroa,Héctor Olvera-Prado,Fidel López-Verdugo,Sofía Narváez-C 대한소화기 기능성질환∙운동학회 2023 Journal of Neurogastroenterology and Motility (JNM Vol.29 No.4
Background/AimsThe evidence suggests that a shorter esophageal length (EL) in gastroesophageal reflux disease (GERD) patients is associated with the presence of hiatal hernia (HH). However, there are no reports of this association in patients with achalasia. The aim is to (1) determine the prevalence of hiatal hernia in achalasia patients, (2) compare achalasia EL with GERD patients and healthy volunteers (HV), (3) measure achalasia manometric esophageal length to height (MELH) ratio, and (4) determine if there are differences in symptoms between patients with and without hiatal hernia. MethodsThis retrospective and cross-sectional study consist of 87 pre-surgical achalasia patients, 22 GERD patients, and 30 HV. High-resolution manometry (HRM), barium swallow, and upper endoscopy were performed to diagnose HH. The EL and MELH ratio were measured by HRM. Symptoms were assessed with Eckardt, Eating Assessment Tool, and GERD–health-related quality of life questionnaires. ResultsThe HH in GERD’s prevalence was 73% vs 3% in achalasia patients (P < 0.001). Achalasia patients had a longer esophagus and a higher MELH ratio than HV and GERD patients (P < 0.001). GERD patients had a lower MELH ratio than HV (P < 0.05). EAT-10 (P < 0.0001) and Eckardt (P < 0.05) scores were higher in achalasia without HH vs HH. ConclusionsThe prevalence of HH in achalasia is significantly lower than in GERD. The longer EL and the higher MELH ratio in achalasia could explain the lower prevalence of HH. Despite the low prevalence of HH in achalasia patients, the surgeon should be encouraged not to rule out HH since the risk of postoperative reflux may increase if this condition is not identified and corrected.
Palmquist-Gomes P.,Ruiz-Villalba A.,Guadix J. A.,Romero J. P.,Bessiéres B.,MacGrogan D.,Conejo L.,Ortiz A.,Picazo B.,Houyel L.,Gómez-Cabrero D.,Meilhac S. M.,de la Pompa J. L.,Pérez-Pomares J. M. 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-
Coronary Artery Fistulae (CAFs) are cardiac congenital anomalies consisting of an abnormal communication of a coronary artery with either a cardiac chamber or another cardiac vessel. In humans, these congenital anomalies can lead to complications such as myocardial hypertrophy, endocarditis, heart dilatation, and failure. Unfortunately, despite their clinical relevance, the aetiology of CAFs remains unknown. In this work, we have used two different species (mouse and avian embryos) to experimentally model CAFs morphogenesis. Both conditional Itga4 (alpha 4 integrin) epicardial deletion in mice and cryocauterisation of chick embryonic hearts disrupted epicardial development and ventricular wall growth, two essential events in coronary embryogenesis. Our results suggest that myocardial discontinuities in the embryonic ventricular wall promote the early contact of the endocardium with epicardial-derived coronary progenitors at the cardiac surface, leading to ventricular endocardial extrusion, precocious differentiation of coronary smooth muscle cells, and the formation of pouch-like aberrant coronary-like structures in direct connection with the ventricular lumen. The structure of these CAF-like anomalies was compared with histopathological data from a human CAF. Our results provide relevant information for the early diagnosis of these congenital anomalies and the molecular mechanisms that regulate their embryogenesis.
G. Ortiz,J. Muhlethaler,J. W. Kolar 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
Semiconductor switches posses non-ideal behavior which, in case of isolated DC-DC converters, can generate DC voltage components in the voltage applied to the transformer. This DC voltage component is translated into a DC flux density component in the transformer core, increasing the risk of driving the core into saturation. In this paper, a novel noninvasive flux density measurement principle, called the “Magnetic Ear”, based on sharing of magnetic path between the main and an auxiliary core is proposed. The active compensation of the transformer DC magnetization level using this transducer is experimentally verified. Additionally, a classification of the previously reported magnetic flux measurement and balancing concepts is performed.
Ortiz, Michael,Cho, Sung,Niklas, Jens,Kim, Seonah,Poluektov, Oleg G.,Zhang, Wei,Rumbles, Garry,Park, Jaehong American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.12
<P>Ultrafast photoinduced electron transfer (PIET) dynamics of a C-70-encapsulated bisporphyrin covalent organic polyhedron hybrid (C-70@COP-5) is studied in a nonpolar toluene medium with fluorescence and transient absorption spectroscopies. This structurally rigid donor (D)-acceptor (A) molecular hybrid offers a new platform featuring conformationally predetermined cofacial D-A orientation with a fixed edge-to-edge separation, R-EE (2.8 angstrom), without the aid of covalent bonds. Sub-picosecond PIET (tau(ET) <= 0.4 ps) and very slow charge recombination (tau(CR) approximate to 600 ps) dynamics are observed. The origin of these dynamics is discussed in terms of enhanced D-A coupling (V = 675 cm(-1)) and extremely small reorganization energy (lambda approximate to 0.18 eV), induced by the intrinsic structural rigidity of the C-70@COP-5 complex.</P>
Effect of Fucoxanthin on Metabolic Syndrome, Insulin Sensitivity, and Insulin Secretion
Armando López-Ramos,Manuel González-Ortiz,Esperanza Martınez-Abundis,Karina G. Perez-Rubio 한국식품영양과학회 2023 Journal of medicinal food Vol.26 No.7
The aim of this study was to evaluate the effect of fucoxanthin on metabolic syndrome (MetS), insulin sensitivity, and insulin secretion. A randomized, double-blind, placebo-controlled clinical trial was conducted in 28 patients diagnosed with MetS. Patients were randomly assigned to receive 12 mg of fucoxanthin or placebo once a day for 12 weeks. Before and after the intervention, the components of MetS, insulin sensitivity (Matsuda index), first phase of insulin secretion (Stumvoll index), and total insulin secretion were evaluated during a 2-h oral glucose tolerance test. After fucoxanthin administration, significant differences were observed in body weight (BW) (80.6 – 11.2 vs. 79.16 – 12.3 kg, P < .01), body mass index (BMI) (31.1 – 3.6 vs. 30.3 – 3.7 kg/m2, P < .01), waist circumference (WC) (101.2 – 9.1 vs. 98.9 – 9.3 cm, P < .01), systolic blood pressure (SBP) (126.1 – 10.3 vs. 120.8 – 9.7 mmHg, P < .01), diastolic blood pressure (DBP) (81.5 – 6.5 vs. 78.6 – 6.3 mmHg, P < .01), triglycerides (TG) (2.2 – 0.7 vs. 2.1 – 0.7 mmol/L, P < .01), Stumvoll index (2403 – 621 vs. 2907 – 732, P < .05), and total insulin secretion (0.84 – 0.31 vs. 1.02 – 0.32, P < .05). In conclusion, fucoxanthin administration leads to a decrease in BW, BMI, WC, SBP, DBP, TG, as well as increase in the first phase of insulin secretion and total insulin secretion in patients with MetS.
Momordica charantia Administration Improves Insulin Secretion in Type 2 Diabetes Mellitus
Marisol Cortez-Navarrete,Esperanza Martınez-Abundis,Karina G. Perez-Rubio,Manuel Gonzalez-Ortiz,Miriam Mendez-del Villar 한국식품영양과학회 2018 Journal of medicinal food Vol.21 No.7
An improvement in parameters of glycemic control has been observed with Momordica charantia in patients with type 2 diabetes mellitus (T2DM). It is unknown whether this improvement is through a modification of insulin secretion, insulin sensitivity, or both. We hypothesized that M. charantia administration can improve insulin secretion and/or insulin sensitivity in patients with T2DM, without pharmacological treatment. The objective of the study was to evaluate the effect of M. charantia administration on insulin secretion and sensitivity. A randomized, double-blinded, placebo-controlled, clinical trial was carried out in 24 patients who received M. charantia (2000 mg/day) or placebo for 3 months. A 2-h oral glucose tolerance test (OGTT) was done before and after the intervention to calculate areas under the curve (AUC) of glucose and insulin, total insulin secretion (insulinogenic index), first phase of insulin secretion (Stumvoll index), and insulin sensitivity (Matsuda index). In the M. charantia group, there were significant decreases in weight, body mass index (BMI), fat percentage, waist circumference (WC), glycated hemoglobin A1c (A1C), 2-h glucose in OGTT, and AUC of glucose. A significant increase in insulin AUC (56,562 ± 36,078 vs. 65,256 ± 42,720 pmol/L/min, P = .043), in total insulin secretion (0.29 ± 0.18 vs. 0.41 ± 0.29, P = .028), and during the first phase of insulin secretion (557.8 ± 645.6 vs. 1135.7 ± 725.0, P = .043) was observed after M. charantia administration. Insulin sensitivity was not modified with any intervention. In conclusion, M. charantia administration reduced A1C, 2-h glucose, glucose AUC, weight, BMI, fat percentage, and WC, with an increment of insulin AUC, first phase and total insulin secretion.