29 results on '"Martínez Franco E"'
Search Results
2. Effect of Conventional Heat Treatments on the Microstructure and Microhardness of IN718 Obtained by Wrought and Additive Manufacturing
- Author
-
Franco-Correa, J. C., Martínez-Franco, E., Alvarado-Orozco, J. M., Cáceres-Díaz, L. A., Espinosa-Arbelaez, D. G., and Villada, J. A.
- Published
- 2021
- Full Text
- View/download PDF
3. Hormonal Influence in Stress Urinary Incontinence During Pregnancy and Postpartum
- Author
-
Molinet Coll C, Martínez Franco E, Altimira Queral L, Cuadras-Palleja D, Amat Tardiu L, and Parés D
- Subjects
Quality of life ,Estradiol ,Stress urinary incontinence ,Pregnancy ,Relaxin ,Progesterone - Abstract
Hormonal changes have been proposed as an etiological factor of stress urinary incontinence (SUI) during pregnancy. Our main objective was to demonstrate the role of hormones in SUI development during pregnancy and postpartum. A prospective longitudinal study was designed. Primiparous women without previous urinary incontinence symptoms were included. Symptoms and Quality of Life (QoL) Questionnaires, physical examinations, and hormone concentration (progesterone, estradiol, and relaxin) were collected twice during pregnancy and three times during postpartum. Logistic regression models, with Wald's forward variable selection method, were used. Prevalence of SUI was 11% in the first trimester, 50% in the third trimester, and 16.4% at 6 months postpartum. The risk of developing SUI throughout pregnancy is higher in women with higher progesterone concentration in the first trimester (OR 1.38, 95% CI 1.06-1.81, p < 0.05) and it is lower in women with stronger pelvic floor muscles in the first trimester (OR 0.35, 95% CI 0.17-0.72, p < 0.05). When occurred during pregnancy, SUI has a 14-fold higher risk of persistence 6 months after birth. In addition, the severity of these symptoms is also an independent risk factor for SUI persistence at 6 months postpartum (OR 1.41, 95% CI 1.15-1.73, p < 0.05). Quality of Life was affected for pregnant women with SUI symptoms. SUI is a highly prevalent condition during pregnancy, affecting the QoL of women in many areas. Higher concentration of progesterone can play a role in SUI development during pregnancy. The presence and severity of SUI during pregnancy are risk factors for the persistence of symptoms 6 months postpartum. Sustaining an optimal pelvic floor muscle strength could prevent SUI during pregnancy.
- Published
- 2022
4. Transperineal anal sphincter complex evaluation after obstetric anal sphincter injuries: With or without tomographic ultrasound imaging technique?
- Author
-
Martínez Franco E, Ros C, Santoro GA, Cassadó Garriga J, Amat Tardiu L, Cuadras-Palleja D, and Espuña M
- Subjects
Anal sphincter ,OASIS ,Tomographic ultrasound imaging ,Transperineal ultrasound - Abstract
OBJECTIVES: "Significant" obstetric anal sphincter injuries (OASIS) have been defined as visible defects of at least 30° in at least 4/6 slices using tomographic ultrasound imaging (TUI) with transperineal ultrasound (TPUS). The objective of this study was to assess if TUI is mandatory for the evaluation of OASIS. METHODS: Patients with a history of OASIS were evaluated by performing 3D-endoanal ultrasound (EAUS) and 3D-TPUS with and without TUI. Any damage to the internal (IAS) or external (EAS) anal sphincters was recorded and scored using the Starck's and the Norderval's systems. Intraobserver and inter-techniques correlations were calculated. RESULTS: From September 2012 to May 2015, 63 women, mean age 32.5 ± 4.6 years, with OASIS (3a: 26 pts., 41.3 %; 3b: 26 pts., 41.3 %; 3c: 6 pts., 9.5 %, 4: 4 pts., 6.3 %, "button hole" tear: 1 pt., 1.6 %). Inter-technique and intraobserver correlations were excellent (TUI: k = 0.9; sweeping technique: k = 0.85; EAUS: k = 0.9) in determining OASIS. Using the Starck's Score, excellent correlation was found for both TPUS modalities (TUI: k = 0.86; sweeping technique: k = 0.89). However, for the different individual parameters, the correlation was moderate for EAS depth (TUI: k = 0.44; sweeping technique: k = 0.5) and good for IAS depth (TUI: k = 0.7; sweeping technique: k = 0.78). Similar results were found using the Norderval's classification. CONCLUSIONS: OASIS can be assessed by TPUS without TUI technique, dragging the rendered box and following the anal canal from the anal verge to the anorectal junction in the longitudinal plane and describing findings.
- Published
- 2021
5. Influence of Bowel Habit and Hormonal Changes on the Development of Hemorrhoidal Disease During Pregnancy and the Postdelivery Period: A Prospective Cohort Study
- Author
-
Parés D, Molinet C, Troya J, Altimira-Queral L, López-Negre JL, and Martínez Franco E
- Abstract
BACKGROUND: Hemorrhoidal disease in women during pregnancy is common in clinical practice. However, prospective data on its real prevalence and women's demographics are scarce. OBJECTIVE: The aim of this study was to determine the prevalence of hemorrhoidal disease during pregnancy and to assess its impact on quality of life. In addition, this study aimed to identify the relationship between patients' characteristics, bowel habits, hormonal changes, and the presence of symptomatic hemorrhoids. DESIGN: This is a prospective longitudinal cohort study. SETTING: This study was conducted in the Obstetrics Department for pregnancy follow-up. PATIENTS: The patients evaluated were a cohort of pregnant women. INTERVENTION: The study was designed to follow a homogeneous cohort of women for 15 months. Visits took place in the first and third trimesters of pregnancy, and 3 and 6 months after delivery. Women's demographics (age, medical history, bowel habit, Bristol stool scale) and serum determination of pregnancy-related hormones (estrogen, progesterone, and relaxin) were determined. MAIN OUTCOME MEASURES: The primary outcome was the development of hemorrhoidal disease. RESULTS: Overall, 109 women (mean age, 31.2 ± 5.4 years) were included in the study. The prevalence of symptoms and physical findings of hemorrhoidal disease was present in 11% in the first trimester, 23% in the third trimester, 36.2% at 1 month after delivery, and 16.9% at 3 months after delivery. A medical history of hemorrhoidal disease was significantly associated with the diagnosis of hemorrhoids in the first trimester (p < 0.0001) and third trimester (p = 0.005). Symptoms of constipation were associated with this clinical disorder in the first trimester (p = 0.011) and the third trimester of pregnancy (p = 0.022). No association was found between hormonal changes and the development of hemorrhoidal disease. LIMITATIONS: A larger sample would provide more information. CONCLUSIONS: The prevalence of women with hemorrhoidal disease increases during pregnancy and after delivery. A history of hemorrhoidal disease and constipation is significantly associated with the diagnosis of symptomatic hemorrhoidal disease. See Video Abstract at http://links.lww.com/DCR/B504. INFLUENCIA DEL HBITO INTESTINAL Y LOS CAMBIOS HORMONALES EN EL DESARROLLO DE LA ENFERMEDAD HEMORROIDAL DURANTE EL EMBARAZO Y EL PERODO POSTERIOR AL PARTO UN ESTUDIO DE COHORTE PROSPECTIVO: ANTECEDENTES:La enfermedad hemorroidal en mujeres durante el embarazo es común en la práctica clínica. Sin embargo, hay escasos datos prospectivos sobre su prevalencia real y la demografía de las mujeres.OBJETIVO:El objetivo fue determinar la prevalencia de enfermedad hemorroidal durante el embarazo y evaluar su impacto en la calidad de vida. Además, identificar la relación entre las características de los pacientes, los hábitos intestinales, los cambios hormonales y la presencia de hemorroides sintomáticas.DISEÑO:Estudio prospectivo de cohorte longitudinal.AJUSTE:Este estudio se realizó en el Departamento de Obstetricia para el seguimiento del embarazo.PACIENTES:Una cohorte de mujeres embarazadas.INTERVENCIÓN:El estudio se diseñó para realizar un seguimiento de una cohorte homogénea de mujeres durante 15 meses. Las visitas se realizaron en el primer y tercer trimestre del embarazo, y a los 3 y 6 meses después del parto. Se determinaron los datos demográficos de las mujeres (edad, antecedentes médicos, hábito intestinal, escala de heces de Bristol) y la determinación sérica de hormonas relacionadas con el embarazo (estrógeno, progesterona y relaxina).PRINCIPALES MEDIDAS DE RESULTADO:El resultado principal fue el desarrollo de enfermedad hemorroidal.RESULTADOS:Se incluyó en el estudio a 109 mujeres (edad media, 31,2 ± 5,4 años). La prevalencia de síntomas y hallazgos físicos de enfermedad hemorroidal estuvo presente en 11% en el primer trimestre, 23% en el tercer trimestre, 36,2% 1 mes después del parto y 16,9% 3 meses después del parto. Un historial médico previo de enfermedad hemorroidal se asoció significativamente con el diagnóstico de hemorroides en el primer trimestre (p
- Published
- 2021
6. Elevated Levels of Circulating miR-92a Are Associated with Impaired Glucose Homeostasis in Patients with Obesity and Correlate with Metabolic Status After Bariatric Surgery
- Author
-
Cereijo R, Taxerås SD, Piquer-Garcia I, Pellitero S, Martínez Franco E, Tarascó J, Moreno P, Balibrea J, Puig-Domingo M, Jiménez-Pavón D, Lerin-Martinez C, Villarroya F, and Sánchez-Infantes D
- Subjects
Bariatric surgery ,Obesity ,miR-99b ,Brown adipose tissue ,miR-92a - Abstract
INTRODUCTION: miRNAs are small non-coding RNAs, some of which are expressed in adipose tissues, are present in the circulation, and are regulated in obesity. Bariatric surgery (BS) has been proposed to lead to activation of brown adipose tissue, an effect that may be related to beneficial effects of BS on systemic metabolism. Here, we evaluated circulating levels of miR-92a and miR-99b, two miRNAs proposed as biomarkers of brown fat activity, in a cohort of patients with severe obesity before and after BS, and studied their potential relationship with BS-associated improvements in metabolic parameters. METHODS: Circulating levels of miR-92a and miR-99b were quantified in a cohort of 26 patients (age, 48 ± 10 years; BMI, 45 ± 7 kg/m(2)) before and 6 months after BS. Clinical parameters were determined at different time points and correlations among them were studied. RESULTS: Basal levels of miR-92a were significantly increased in patients with obesity relative to lean controls. Serum miR-92a levels were strongly reduced at 6 months after BS, reaching levels similar to those in controls. Serum miR-99b levels were unchanged in relation to both the obese condition and BS. Elevated levels of miR-92a were directly correlated with worsened glucose homeostasis parameters and poor BS outcome. CONCLUSIONS: Our findings show that miR-92a is elevated in conditions of obesity, and its reduction after BS correlates with metabolic improvement. Further studies would be necessary to establish miR-92a as serum biomarker and potential predictor of the BS success in improving the metabolic status of patients with obesity.
- Published
- 2020
7. Differential association between S100A4 levels and insulin resistance in prepubertal children and adult subjects with clinically severe obesity
- Author
-
Taxerås SD, Galán M, Campderros L, Piquer-Garcia I, Pellitero S, Martínez Franco E, Puig R, Lucena I, Tarascó J, Moreno P, Balibrea J, Bel J, Murillo M, Martínez M, Ramon-Krauel M, Puig-Domingo M, Villarroya F, Lerin-Martinez C, and Sánchez-Infantes D
- Subjects
obesity ,insulin resistance ,prepubertal children ,S100A4 - Abstract
OBJECTIVES: S100A4 has been recently identified as an adipokine associated with insulin resistance (IR) in adult subjects with obesity. However, no data about its levels in children with obesity and only a few approaches regarding its potential mechanism of action have been reported. To obtain a deeper understanding of the role of S100A4 in obesity, (a) S100A4 levels were measured in prepubertal children and adult subjects with and without obesity and studied the relationship with IR and (b) the effects of S100A4 in cultured human adipocytes and vascular smooth muscle cells (VSMCs) were determined. METHODS: Sixty-five children (50 with obesity, age 9.0 ±1.1 years and 15 normal weight, age 8.4 ±0.8 years) and fifty-nine adults (43 with severe obesity, age 46 ±11 years and 16 normal weight, age 45 ±9 years) were included. Blood from children and adults and adipose tissue samples from adults were obtained and analysed. Human adipocytes and VSMC were incubated with S100A4 to evaluate their response to this adipokine. RESULTS: Circulating S100A4 levels were increased in both children (P = .002) and adults (P < .001) with obesity compared with their normal-weight controls. In subjects with obesity, S100A4 levels were associated with homeostatic model assessment-insulin resistance (HOMA-IR) in adults (ßstd = .42, P = .008) but not in children (ßstd = .12, P = .356). Human adipocytes were not sensitive to S100A4, while incubation with this adipokine significantly reduced inflammatory markers in VSMC. CONCLUSIONS: Our human data demonstrate that higher S100A4 levels are a marker of IR in adults with obesity but not in prepubertal children. Furthermore, the in vitro results suggest that S100A4 might exert an anti-inflammatory effect. Further studies will be necessary to determine whether S100A4 can be a therapeutic target for obesity.
- Published
- 2020
8. Nanocrystalline Intermetallic Mg2Ni Produced in a Batch Scale Mill
- Author
-
Martínez-Franco, E., primary, Klassen, Thomas, additional, Bormann, Rüdiger, additional, and Jaramillo-Vigueras, D., additional
- Published
- 2006
- Full Text
- View/download PDF
9. Catalyzed Na 2LiAlH 6 for hydrogen storage
- Author
-
Ma, X.Z., Martinez-Franco, E., Dornheim, M., Klassen, T., and Bormann, R.
- Published
- 2005
- Full Text
- View/download PDF
10. Reducing postoperative catheterisation after anterior colporrhaphy from 48 to 24 h: a randomised controlled trial
- Author
-
Fernandez-Gonzalez S, Martínez Franco E, Martínez-Cumplido R, Molinet Coll C, Ojeda González F, Gómez-Roig MD, and Amat Tardiu L
- Subjects
Postoperative catheterization ,Anterior colporrhaphy ,Postoperative urinary retention - Abstract
INTRODUCTION AND HYPOTHESIS: There is a distinct lack of literature on postoperative management after anterior colporrhaphy (AC). Our traditional postoperative protocol consisted of 24 h of indwelling catheterisation followed by 24 h of self-intermittent catheterisation. We hypothesised that a new protocol consisting of only 24 h of indwelling catheterisation might produce better results without additional complications. METHODS: From April 2014 to July 2017, all candidates for AC were randomised to catheter removal 24 or 48 h after surgery. The primary outcome was the postoperative urinary retention (POUR) rate. Secondary outcomes included: asymptomatic bacteriuria (AB), urinary tract infection (UTI) and postoperative pain after 24 h. RESULTS: A total of 79 patients were recruited. Thirty-seven and 40 patients were randomised to follow the 48-h protocol and the 24-h protocol respectively. There were no significant differences in relation to the POUR rate: 3 patients (8.1%) vs 1 (2.5%) in the 48-h vs the 24-h group respectively (p = 0.346). The UTI rate was 2 (8.1%) vs 0 patients respectively (p = 0.139) and the postoperative AB rate was 3 (9.1%) vs 0 patients (p = 0.106). In the postoperative pain evaluation, the visual analogue scale score was significantly higher in the 48 h group (0.35 vs 0.13, p = 0.02). CONCLUSIONS: According to our results, reducing the catheterisation from 48 to 24 h after AC does not increase the risk of POUR and decreases the rate of UTI, AB and postoperative pain. This new postoperative management protocol of pelvic floor surgery would improve postoperative outcomes and shorten the stay in hospital.
- Published
- 2019
11. Anatomic and functional evaluation of the levator ani muscle after an obstetric anal sphincter injury
- Author
-
Martínez Franco E, López-Negre JL, Parés D, Ros Cerro C, Amat Tardiu L, Cuadras-Palleja D, and Espuña Pons M
- Subjects
Anal sphincter obstetric injury ,Levator ani ,Anal incontinence - Abstract
PURPOSE: To study the relationship between symptoms of anal incontinence (AI) and the anatomy and functionality of the levator ani muscle in women with a history of obstetric anal sphincter injury (OASI). METHODS: This is a cohort study including patients with OASI from 2013 to 2016. Patients were assessed by a physical examination, endoanal ultrasound using Starck Scale, perineometry and 4D transperineal ultrasound. AI in all patients was measured with the Wexner scale. Correlation between variables has been analyzed in these patients. RESULTS: 72 patients were analyzed: 28 with a IIIA degree tear, 26 with a IIIB, 13 with a IIIC and 5 with a IV. 38 patients showed a residual anal sphincter (AS) defect on endoanal ultrasound with an average Starck score of 6.5 ± 3.7. 21 patients expressed AI, with an average Wexner score of 4.1 ± 2.4. In 27 (37.5%) patients, a levator ani avulsion was observed: 17 unilateral and 10 bilateral. Patients with a levator ani defect had weaker pelvic floor muscle (PFM) function. These differences were statistically significant with perineometry (p = 0.01 and p = 0.03) but not for the Oxford test (p = 0.08). Patients with a residual AS defect as well as an injury to the levator ani muscle expressed greater AI symptomatology than patients with residual sphincter injury who maintain the integrity of the levator ani: Wexner 4.9 0.9 vs 3.3 1 (p = 0.02). CONCLUSIONS: The PFM has correlation with AI symptom development in patients with a history of OASI. Therefore, we suggest a key role of anatomical and functional assessments of the levator ani muscle in these patients.
- Published
- 2019
12. Contasure-needleless® compared with Monarc® for the treatment of stress urinary incontinence
- Author
-
Fernandez-Gonzalez S, Martínez Franco E, Lin Miao X, and Amat Tardiu L
- Subjects
Single-incision sling ,Needleless® ,Stress urinary incontinence ,Monarc® - Abstract
INTRODUCTION AND HYPOTHESIS: For the treatment of stress urinary incontinence (SUI), various retropubic and transobturator techniques have demonstrated high cure rates. Single-incision tapes, such as Contasure-Needleless® (C-NDL), have demonstrated similar cure rates to the inside-out transobturator sling (TVT-O®). The aim of this study was to analyse if C-NDL® is equally as effective as an outside-in transobturator sling (Monarc®) for the treatment of SUI. METHODS: We carried out a prospective, single-centre, randomised trial. The results were analysed for a non-inferiority test with a minimum postoperative follow-up of 12 months. The objective and subjective cure rates were evaluated by a stress test and a postoperative Sandvik Severity Index respectively. Patient satisfaction and operative complications were registered. The cure was defined by a negative stress test and SSI 0. RESULTS: A total of 187 patients were included, 89 and 98 undergoing C-NDL® and Monarc® respectively. Epidemiological and clinical data did not show and significant differences between both groups except a high prevalence of women who smoke (15.7% C-NDL® vs 6.1% Monarc®, p 0.03). The negative stress test was negative in 72 patients (80.9%) in C-NDL® compared with 85 (88.5%) in Monarc® (p 0.082). The SSI was 0 in 47 (66.2%) for C-NDL® and 61 (70.1%) for the Monarc® group (p 0.01). There were 14 (16.1%) and 8 (8.3%) dissatisfied patients for the C-NDL® and Monarc® groups respectively (p 0.068). The rate of complications was similar in both groups. CONCLUSIONS: According to the non-inferiority test, C-NDL® is not inferior to Monarc® (post-surgical SSI test), but it is inferior in the comparison of a negative stress test and patient satisfaction.
- Published
- 2017
13. Synthesis and Characterization of Carbon Nanotubes Via Spray Pyrolysis Method
- Author
-
Uriza-Vega, E., primary, Herrera-Ramírez, M., additional, Lopez-Meléndez, C., additional, Estrada-Guel, I., additional, Martínez-Franco, E., additional, Martínez-Sánchez, R., additional, and Carreño-Gallardo, C., additional
- Published
- 2017
- Full Text
- View/download PDF
14. Effect of Multiwall Carbon Nanotubes (MWCNs) Reinforcement on the Mechanical Behavior of Synthesis 7075 Aluminum Alloy Composites by Mechanical Milling
- Author
-
Carreño-Gallardo, C., primary, Uriza-Vega, E., additional, Estrada-Guel, I., additional, Herrera-Ramírez, M., additional, Martínez-Sánchez, R., additional, Lopez-Meléndez, C., additional, and Martínez-Franco, E., additional
- Published
- 2017
- Full Text
- View/download PDF
15. Evaluation of hardness and precipitation in Zn-modified Al2024 alloy after plastic deformation and heat treatments
- Author
-
Garay-Reyes, C.G., primary, González-Rodelas, L., additional, Cuadros-Lugo, E., additional, Martínez-Franco, E., additional, Aguilar-Santillan, J., additional, Estrada-Guel, I., additional, Maldonado-Orozco, M.C., additional, and Martínez-Sánchez, R., additional
- Published
- 2017
- Full Text
- View/download PDF
16. Postpartum two- and three-dimensional ultrasound evaluation of anal sphincter complex in women with obstetric anal sphincter injury
- Author
-
Ros, C., primary, Martínez-Franco, E., additional, Wozniak, M. M., additional, Cassado, J., additional, Santoro, G. A., additional, Elías, N., additional, López, M., additional, Palacio, M., additional, Wieczorek, A. P., additional, and Espuña-Pons, M., additional
- Published
- 2017
- Full Text
- View/download PDF
17. Pelvic organ prolapse and stress urinary incontinence, do they share the same risk factors?
- Author
-
Rodríguez-Mias NL, Martínez Franco E, Aguado J, Sánchez E, and Amat Tardiu L
- Subjects
body regions ,Epidemiology, Pelvic floor dysfunction, Pelvic organ prolapse, Risk factor, Urinary incontinence - Abstract
To determine whether there are differences in the etiologies of two of the most common pelvic floor disorders (PFD), pelvic organ prolapse (POP) and stress urinary incontinence (SUI).
- Published
- 2015
18. Prevalence of Fecal Incontinence in Women During Pregnancy: A Large Cross-Sectional Study
- Author
-
Parés D, Martínez Franco E, Lorente N, Jorge Viguer Rovira, López-Negre JL, and Mendez JR
- Subjects
fluids and secretions - Abstract
Although some studies have analyzed the prevalence of urinary incontinence during pregnancy, there are scarce data on the frequency and characteristics of fecal incontinence during this period.
- Published
- 2015
19. Synthesis and characterization of a MoWC-WC-NiC nanocomposite via mechanical alloying and sintering
- Author
-
Rivera Olvera, Jesús Noé, primary, Gutiérrez Paredes, G.J., additional, Romero Serrano, Antonio, additional, Rivera López, E., additional, Martínez Franco, E., additional, Tamayo Meza, P., additional, and Díaz Barriga Arceo, L., additional
- Published
- 2015
- Full Text
- View/download PDF
20. Nanocrystalline Intermetallic Mg2Ni Produced in a Batch Scale Mill
- Author
-
Martínez-Franco, E., Klassen, Thomas, Bormann, Rüdiger, and Jaramillo-Vigueras, D.
- Abstract
Nanocrystalline intermetallic Mg2Ni is successfully produced on a batch production scale from elemental powder blends by mechanical alloying using a high-energy rotor ball mill (Simoloyer). Different ball-to-powder mass ratios are used in order to provide results for scaling to industrial production. Transformation of elemental Mg-Ni powders into the Mg2Ni intermetallic is observed by x-ray diffraction. Particle morphology during milling is observed by scanning electron microscopy. A relatively low Fe contamination is estimated by energy dispersive spectrometry.
- Published
- 2006
- Full Text
- View/download PDF
21. Technologies for Mechanical Recycling of Carbon Fiber-Reinforced Polymers (CFRP) Composites: End Mill, High-Energy Ball Milling, and Ultrasonication.
- Author
-
Martínez-Franco E, Gomez Culebro VA, and Franco-Urquiza EA
- Abstract
Carbon fiber reinforced polymer (CFRP) composites have very high specific properties, which is why they are used in the aerospace, wind power, and sports sectors. However, the high consumption of CFRP compounds leads to a high volume of waste, and it is necessary to formulate mechanical recycling strategies for these materials at the end of their useful life. The recycling differences between cutting-end mills and high-energy ball milling (HEBM) were evaluated. HEBM recycling allowed us to obtain small recycled particles, but separating their components, carbon fiber, epoxy resin, and CFRP particles, was impossible. In the case of mill recycling, these were obtained directly from cutting a CFRP composite laminate. The recycled materials resulted in a combination of long fibers and micrometric particles-a sieving step allowed for more homogeneous residues. Although long, individual carbon fibers can pass through the sieve. Ultrasonication did not significantly affect HEBM recyclates because of the high energy they are subjected to during the grinding process, but it was influential on end mill recyclates. The ultrasonication amplitude notably impacted the separation of the epoxy resin from the carbon fiber. The end mill and HEBM waste production process promote the presence of trapped air and electrostatics, which allows recyclates to float in water and be hydrophobic.
- Published
- 2024
- Full Text
- View/download PDF
22. Tailored Time-Temperature Transformation Diagram for IN718 Alloy Obtained via Powder Bed Fusion Additive Manufacturing: Phase Behavior and Precipitation Dynamic.
- Author
-
Franco-Correa JC, Martínez-Franco E, Cruz-González CE, Salgado-López JM, and Villada-Villalobos JA
- Abstract
Experimental and computational approaches were used to study the microstructure of IN718 produced via powder bed fusion additive manufacturing (PBF-AM). The presence, chemical composition, and distribution of stable and metastable phases (γ'', δ, MC, and Laves) were also analyzed. The information obtained from the microstructural study was used to construct a tailored time-temperature transformation (TTT) diagram customized for additive manufacturing of IN718. Experimental techniques, including differential scanning calorimetry (DSC), scanning electron microscopy, energy dispersive X-ray spectroscopy, and electron backscatter diffraction (EBSD), were employed to establish the morphological, chemical, and structural characteristics of the microstructure. The Thermo-Calc software and a Scheil-Gulliver model were used to analyze the presence and behavior of phase transformations during heating and cooling processes under non-thermodynamic equilibrium conditions, typical of AM processes. Unlike conventional TTT diagrams of this alloy, the diagram presented here reveals that the precipitation of γ'' and δ phases occurs at lower temperatures and shorter times in AM-manufactured parts. Significantly, the superposition of γ'' and δ phase curves in the proposed diagram underscores the interdependence between these phases. This TTT diagram is a valuable insight that can help in the development of heat treatment processes and quality control for IN718 produced via PBF-AM.
- Published
- 2023
- Full Text
- View/download PDF
23. Factors involved in changes in the levator ani during pregnancy.
- Author
-
Martínez Franco E, Molinet Coll C, Altimira Queral L, Balsells S, Carreras M, and Parés D
- Subjects
- Pregnancy, Female, Humans, Prospective Studies, Muscle Contraction physiology, Ultrasonography, Parity, Delivery, Obstetric methods, Relaxin
- Abstract
Introduction and Hypothesis: Levator ani muscle (LAM) dimensions increase during pregnancy to allow the delivery of the fetus. The objective was to investigate which factors are involved in LAM modifications during pregnancy., Methods: A prospective longitudinal observational study was conducted between July 2015 and March 2018. Ninety-nine nulliparous pregnant women were included. Data on the physical examination, 4D transperineal ultrasound and hormonal concentrations (progesterone, oestradiol and relaxin) were collected during the first and third trimesters., Results: We found higher hiatal dimensions at the beginning of pregnancy than in other studies with nonpregnant women. Increases in the levator ani hiatal (LH) dimensions were observed at contraction (1.01 ±1.96 cm
2 ), rest (0.82 ± 2.51 cm2 ) and on Valsalva (2.36 ± 3.64 cm2 ) throughout pregnancy. The distensibility in the third trimester was higher than in the first trimester (5.79 vs 4.24 cm2 ; p=0); however, the contractility was lower (-3.32 vs -3.5 cm2 ; p=0.04). Women with lower scores on the Modified Oxford Grading Scale in the third trimester presented with lower contractility in the LAM. A larger LH at the end of pregnancy was associated with age and body mass index. Eleven women developed ballooning during pregnancy; in these women, relaxin was higher in both trimesters than in women without ballooning, but these results were not statistically significant. The linear models to predict third-trimester Valsalva LH, distensibility and contractility were not conclusive and did not show any factors to predict LAM modifications during pregnancy., Conclusions: Hormones could play a role in modifying the muscle properties of LAM from the beginning of pregnancy, but we did not find an association between LAM measurements and hormone concentration in this study., (© 2023. The International Urogynecological Association.)- Published
- 2023
- Full Text
- View/download PDF
24. Determination of TTT Diagrams of Ni-Al Binary Using Neural Networks.
- Author
-
Hernández-Flores L, García-Moreno AI, Martínez-Franco E, Ronquillo-Lomelí G, and Villada-Villalobos JA
- Abstract
The heat treatment of a metal is a set of heating and cooling cycles that a metal undergoes to change its microstructure and, therefore, its properties. Temperature-time-transformation (TTT) diagrams are an essential tool for interpreting the resulting microstructures after heat treatments. The present work describes a novel proposal to predict TTT diagrams of the γ' phase for the Ni-Al alloy using artificial neural networks (ANNs). The proposed methodology is composed of five stages: (1) database creation, (2) experimental design, (3) ANNs training, (4) ANNs validation, and (5) proposed models analysis. Two approaches were addressed, the first to predict only the nose point of the TTT diagrams and the second to predict the complete curve. Finally, the best models for each approach were merged to compose a more accurate hybrid model. The results show that the multilayer perceptron architecture is the most efficient and accurate compared to the simulated TTT diagrams. The prediction of the nose point and the complete curve showed an accuracy of 98.07% and 86.41%, respectively. The proposed final hybrid model achieves an accuracy of 96.59%.
- Published
- 2022
- Full Text
- View/download PDF
25. Obturator abscess with spread to the thigh muscles after a transobturator tension-free vaginal tape.
- Author
-
Martínez Franco E, Rojo N, and Amat Tardiu L
- Subjects
- Female, Humans, Abscess diagnostic imaging, Abscess etiology, Muscle, Skeletal diagnostic imaging, Suburethral Slings adverse effects
- Published
- 2016
- Full Text
- View/download PDF
26. Urinary incontinence during pregnancy. Is there a difference between first and third trimester?
- Author
-
Martínez Franco E, Parés D, Lorente Colomé N, Méndez Paredes JR, and Amat Tardiu L
- Subjects
- Adolescent, Adult, Cross-Sectional Studies, Female, Humans, Incidence, Pregnancy, Prevalence, Quality of Life, Severity of Illness Index, Surveys and Questionnaires, Urine, Young Adult, Pregnancy Complications epidemiology, Pregnancy Trimester, First, Pregnancy Trimester, Third, Urinary Incontinence epidemiology
- Abstract
Objective: The aim of this study is to determine the prevalence and severity of urinary incontinence and to see if there are any differences between first and third trimester of pregnancy., Study Design: A cross-sectional study of two groups of women was conducted. All patients attending our hospital for obstetric ultrasound examination during the first trimester (group 1=less than 13 weeks of pregnancy) and third trimester (group 2=up to 28 weeks of pregnancy) were eligible for inclusion. All participating women completed self-reported questionnaires: ICIQ-SF, PFDI-20 (UDI-6, CRADI-8, POPDI-6) and SF-36. The variables studied were biodemographic data and results from questionnaire responses., Results: From March 2012 to May 2012, 224 consecutive pregnant women were included in this study: group 1 (n=58) and group 2 (n=166). The incidence of urinary incontinence during pregnancy is different in first and third trimester: 18.96% (11 of 58) and 39.76% (66 of 166) (p=0.008). 100% and 84.12% of women with UI in first trimester and third trimester respectively leak a small amount of urine. In 15.87% of group 2 the leakage was a moderate amount of urine. Participants mainly presented Stress UI (78.37%) and urge was only present in 12.16% of them., Conclusions: In conclusion, according to the results obtained, the prevalence of urinary incontinence in our population of pregnant women was 34.37%, which means that more than a third of the population of pregnant women is affected, and that this disorder is more common during the third trimester of pregnancy than during the first. The most common form was stress urinary incontinence, affecting 48.05% of the women. In all patients, leakage was slight-moderate that did not severely hamper their everyday life but did affect their physical, mental and social domains of their quality of life. Another problem, even more prevalent than incontinence itself, was the increase in urinary frequency, affecting 41.25% of the pregnant women and causing discomfort/distress in the 68.8%., (Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2014
- Full Text
- View/download PDF
27. Surgical treatment of vaginal prolapse with Prolift® mesh in patients with risk of recurrence.
- Author
-
Martínez-Franco E, Amat-Tardiu L, Rodríguez-Mias N, Cortés-Laguna L, and Laïlla-Vicens JM
- Subjects
- Adult, Aged, Female, Follow-Up Studies, Humans, Middle Aged, Pelvic Floor surgery, Recurrence, Risk, Treatment Outcome, Urinary Catheterization, Uterine Prolapse pathology, Vagina pathology, Gynecologic Surgical Procedures methods, Surgical Mesh, Uterine Prolapse surgery
- Abstract
Objective: The aim of this paper is to analyze the results obtained in pelvic floor surgery using a non-absorbable mesh in selected patients with risk factors of recurrent prolapse., Methods: Case series including a total of 76 patients who were surgically treated for severe genital prolapse from July 2005 to December 2009, with risk factors for recurrence of genital prolapse., Results: We detected 3 cases (6.8%) of symptomatic prolapse recurrence and 6 cases (13.6%) of prolapse of another compartment in the anterior Prolift® group. In the posterior Prolift® group there were no recurrences but there were 2 cases (10.52%) of prolapse of another compartment. In the total Prolift® group, there were 2 cases (16.6%) of symptomatic prolapse recurrence. As for de novo urgency, there were a total of 4 cases (5.33%), 3 in the anterior Prolift® group and 1 in the total Prolift® group. We did not detect any case of severe pain in the pelvis or mesh insertion points that required reoperation due to persistence., Conclusions: The use of mesh in pelvic floor reconstructive surgery in selected patients with risk factors for recurrence is a good treatment option to prevent or attempt to reduce the recurrence or reoperation rates currently described.
- Published
- 2012
28. Contasure-Needleless compared with transobturator-TVT for the treatment of stress urinary incontinence.
- Author
-
Amat I Tardiu L, Martínez Franco E, and Laïlla Vicens JM
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Middle Aged, Pain, Postoperative etiology, Treatment Outcome, Urologic Surgical Procedures adverse effects, Urologic Surgical Procedures methods, Patient Satisfaction, Suburethral Slings, Urinary Incontinence, Stress surgery, Urologic Surgical Procedures instrumentation
- Abstract
Introduction: Single-incision devices for the treatment of stress urinary incontinence (SUI) have been introduced in the last few years. We report a comparison between Obturator Tension-free vaginal tape (TVT-O) and Contasure-Needleless (C-NDL)., Methods: One hundred and fifty-eight women with primary SUI were scheduled to receive TVT-O or C-NDL and follow-up during the first year. Epidemiological information, complications, blood loss, and pain level were recorded. We also analyze stress test and quality of life., Results: Sixty-three (87.5%) C-NDL presented a negative stress test, compared with 54 (90%) of TVT-O (p value 0.015 for non-inferiority test). Sandvik Severity Index was 0 in 75.4% in the C-NDL group and 87.3% in the TVT-O (p < 0.015). Complication rate and degree of satisfaction were similar in both groups. Statistically, there were differences (p = 0.012) in postoperative pain in the TVT-O group., Conclusions: C-NDL provides similar outcomes as TVT-O after 1-year follow-up. It is necessary that long-term data confirm our results.
- Published
- 2011
- Full Text
- View/download PDF
29. [Analysis of the efficacy and complications of the surgical treatment of stress urinary incontinence: retropubic and transobturator TVT. Our experience].
- Author
-
Mora Hervás I, Amat Tardiu L, Martínez Franco E, and Lailla Vicens JM
- Subjects
- Female, Humans, Intraoperative Complications epidemiology, Middle Aged, Postoperative Complications epidemiology, Prospective Studies, Urologic Surgical Procedures adverse effects, Urologic Surgical Procedures methods, Intraoperative Complications etiology, Postoperative Complications etiology, Suburethral Slings, Urinary Incontinence, Stress surgery
- Abstract
Objectives: To evaluate the differences in results and complications between retropubic and obturator TVT., Methods: Descriptive prospective study including 245 patients who underwent retropubic TVT and 90 obturator TVT after the diagnosis of stress urinary incontinence by means of clinical history, physical examination and urodynamic tests. Continence outcomes and Intraoperative/post operative complications were recorded., Results: There were intraoperative complications in 12.65% of the retropubic TVT and 1.11% of the obturator TVT (p = 0.002). Immediate post operative complications appeared in 24.5% of the retropubic TVTs and 12.2% of the obturator TVTs: severe anemia (0.4 vs. 1.1%), inguinal pain (1.2 vs. 4.4%), hematoma (1.6 vs. 0%), urinary tract infection (12.2 vs. 4.4%), and acute urinary retention (8.9 vs. 2.2%) (p = 0.018). Complications during follow-up: partial exteriorization of the mesh (0.81 vs. 1.11%) and de novo urgency incontinence (9.38 vs. 4.44%) (p = 0.031). Post operative results were similar for both groups: 90.2% vs. 91.1% cured (p = 0.046), improvement in 8.2% vs. 6.7% (p = 0.18) and failure in 1.6% vs. 2.2% (p = 0.57)., Conclusions: The obturator TVT seems to be preferable to retropubic TVT because it offers a lower complications rate without differences in post operative results in the short-term.
- Published
- 2007
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.