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1.
Am J Perinatol ; 40(15): 1644-1650, 2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-34775581

RESUMEN

OBJECTIVE: This study aimed to compare the effectiveness of sustained uterine compression versus uterine massage in reducing blood loos after a vaginal delivery. STUDY DESIGN: This was a prospective randomized trial conducted at the American University of Beirut Medical Center (AUBMC) between October 2015 and October 2017. Inclusion criteria were women with a singleton pregnancy at ≥36 weeks of gestation, with less than three previous deliveries, who were candidates for vaginal delivery. Participants were randomized into two groups, a sustained uterine compression group (group 1) and a uterine massage group (group 2). Incidence of postpartum hemorrhage (blood loss of ≥500 mL) was the primary outcome. We assumed that the incidence of postpartum hemorrhage at our institution is similar to previously published studies. A total of 545 women were required in each arm to detect a reduction from 9.6 to 4.8% in the primary outcome (50% reduction) with a one-sided α of 0.05 and a power of 80%. Factoring in a 10% dropout rate. Secondary outcomes were admission to intensive care unit (ICU), postpartum complications, drop in hemoglobin, duration of hospital stay, maternal pain, use of uterotonics, or of surgical procedure for postpartum hemorrhage. RESULTS: A total of 550 pregnant women were recruited, 273 in group 1 and 277 in group 2. There was no statistically significant difference in baseline characteristics between the two groups. Type of anesthesia, rate of episiotomy, lacerations, and mean birth weight were also equal between the groups. Incidence of the primary outcome was not different between the two groups (group 1: 15.5%, group 2: 15.4%; p = 0.98). There was no statistically significant difference in any of the secondary outcomes between the two groups, including drop in hemoglobin (p = 0.79). CONCLUSION: There was no difference in blood loss between sustained uterine compression and uterine massage after vaginal delivery. KEY POINTS: · Transabdominal uterine compression and uterine massage are appropriate to prevent postpartum hemorrhage.. · No significant difference in blood loss or maternal discomfort observed between the two techniques.. · Both methods are equally effective and either one can be used based on provider preference..


Asunto(s)
Hemorragia Posparto , Femenino , Embarazo , Humanos , Masculino , Hemorragia Posparto/prevención & control , Estudios Prospectivos , Parto Obstétrico/efectos adversos , Masaje/métodos , Hemoglobinas
2.
Sensors (Basel) ; 23(6)2023 Mar 16.
Artículo en Inglés | MEDLINE | ID: mdl-36991884

RESUMEN

Terminal neurological conditions can affect millions of people worldwide and hinder them from doing their daily tasks and movements normally. Brain computer interface (BCI) is the best hope for many individuals with motor deficiencies. It will help many patients interact with the outside world and handle their daily tasks without assistance. Therefore, machine learning-based BCI systems have emerged as non-invasive techniques for reading out signals from the brain and interpreting them into commands to help those people to perform diverse limb motor tasks. This paper proposes an innovative and improved machine learning-based BCI system that analyzes EEG signals obtained from motor imagery to distinguish among various limb motor tasks based on BCI competition III dataset IVa. The proposed framework pipeline for EEG signal processing performs the following major steps. The first step uses a meta-heuristic optimization technique, called the whale optimization algorithm (WOA), to select the optimal features for discriminating between neural activity patterns. The pipeline then uses machine learning models such as LDA, k-NN, DT, RF, and LR to analyze the chosen features to enhance the precision of EEG signal analysis. The proposed BCI system, which merges the WOA as a feature selection method and the optimized k-NN classification model, demonstrated an overall accuracy of 98.6%, outperforming other machine learning models and previous techniques on the BCI competition III dataset IVa. Additionally, the EEG feature contribution in the ML classification model is reported using Explainable AI (XAI) tools, which provide insights into the individual contributions of the features in the predictions made by the model. By incorporating XAI techniques, the results of this study offer greater transparency and understanding of the relationship between the EEG features and the model's predictions. The proposed method shows potential levels for better use in controlling diverse limb motor tasks to help people with limb impairments and support them while enhancing their quality of life.


Asunto(s)
Interfaces Cerebro-Computador , Calidad de Vida , Electroencefalografía/métodos , Algoritmos , Aprendizaje Automático
3.
Sensors (Basel) ; 22(5)2022 Feb 26.
Artículo en Inglés | MEDLINE | ID: mdl-35270995

RESUMEN

Prostate cancer, which is also known as prostatic adenocarcinoma, is an unconstrained growth of epithelial cells in the prostate and has become one of the leading causes of cancer-related death worldwide. The survival of patients with prostate cancer relies on detection at an early, treatable stage. In this paper, we introduce a new comprehensive framework to precisely differentiate between malignant and benign prostate cancer. This framework proposes a noninvasive computer-aided diagnosis system that integrates two imaging modalities of MR (diffusion-weighted (DW) and T2-weighted (T2W)). For the first time, it utilizes the combination of functional features represented by apparent diffusion coefficient (ADC) maps estimated from DW-MRI for the whole prostate in combination with texture features with its first- and second-order representations, extracted from T2W-MRIs of the whole prostate, and shape features represented by spherical harmonics constructed for the lesion inside the prostate and integrated with PSA screening results. The dataset presented in the paper includes 80 biopsy confirmed patients, with a mean age of 65.7 years (43 benign prostatic hyperplasia, 37 prostatic carcinomas). Experiments were conducted using different well-known machine learning approaches including support vector machines (SVM), random forests (RF), decision trees (DT), and linear discriminant analysis (LDA) classification models to study the impact of different feature sets that lead to better identification of prostatic adenocarcinoma. Using a leave-one-out cross-validation approach, the diagnostic results obtained using the SVM classification model along with the combined feature set after applying feature selection (88.75% accuracy, 81.08% sensitivity, 95.35% specificity, and 0.8821 AUC) indicated that the system's performance, after integrating and reducing different types of feature sets, obtained an enhanced diagnostic performance compared with each individual feature set and other machine learning classifiers. In addition, the developed diagnostic system provided consistent diagnostic performance using 10-fold and 5-fold cross-validation approaches, which confirms the reliability, generalization ability, and robustness of the developed system.


Asunto(s)
Adenocarcinoma , Neoplasias de la Próstata , Adenocarcinoma/diagnóstico por imagen , Anciano , Imagen de Difusión por Resonancia Magnética/métodos , Humanos , Masculino , Próstata/diagnóstico por imagen , Neoplasias de la Próstata/diagnóstico por imagen , Reproducibilidad de los Resultados
4.
Sensors (Basel) ; 21(8)2021 Apr 07.
Artículo en Inglés | MEDLINE | ID: mdl-33917035

RESUMEN

Prostate cancer is one of the most identified cancers and second most prevalent among cancer-related deaths of men worldwide. Early diagnosis and treatment are substantial to stop or handle the increase and spread of cancer cells in the body. Histopathological image diagnosis is a gold standard for detecting prostate cancer as it has different visual characteristics but interpreting those type of images needs a high level of expertise and takes too much time. One of the ways to accelerate such an analysis is by employing artificial intelligence (AI) through the use of computer-aided diagnosis (CAD) systems. The recent developments in artificial intelligence along with its sub-fields of conventional machine learning and deep learning provide new insights to clinicians and researchers, and an abundance of research is presented specifically for histopathology images tailored for prostate cancer. However, there is a lack of comprehensive surveys that focus on prostate cancer using histopathology images. In this paper, we provide a very comprehensive review of most, if not all, studies that handled the prostate cancer diagnosis using histopathological images. The survey begins with an overview of histopathological image preparation and its challenges. We also briefly review the computing techniques that are commonly applied in image processing, segmentation, feature selection, and classification that can help in detecting prostate malignancies in histopathological images.


Asunto(s)
Inteligencia Artificial , Neoplasias de la Próstata , Diagnóstico por Computador , Humanos , Procesamiento de Imagen Asistido por Computador , Aprendizaje Automático , Masculino , Neoplasias de la Próstata/diagnóstico por imagen
5.
J Pers ; 88(6): 1252-1267, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32557617

RESUMEN

OBJECTIVES: The Dark Triad traits (i.e., narcissism, psychopathy, Machiavellianism) capture individual differences in aversive personality to complement work on other taxonomies, such as the Big Five traits. However, the literature on the Dark Triad traits relies mostly on samples from English-speaking (i.e., Westernized) countries. We broadened the scope of this literature by sampling from a wider array of countries. METHOD: We drew on data from 49 countries (N = 11,723; 65.8% female; AgeMean  = 21.53) to examine how an extensive net of country-level variables in economic status (e.g., Human Development Index), social relations (e.g., gender equality), political orientations (e.g., democracy), and cultural values (e.g., embeddedness) relate to country-level rates of the Dark Triad traits, as well as variance in the magnitude of sex differences in them. RESULTS: Narcissism was especially sensitive to country-level variables. Countries with more embedded and hierarchical cultural systems were more narcissistic. Also, sex differences in narcissism were larger in more developed societies: Women were less likely to be narcissistic in developed (vs. less developed) countries. CONCLUSIONS: We discuss the results based on evolutionary and social role models of personality and sex differences. That higher country-level narcissism was more common in less developed countries, whereas sex differences in narcissism were larger in more developed countries, is more consistent with evolutionary than social role models.


Asunto(s)
Maquiavelismo , Narcisismo , Afecto , Trastorno de Personalidad Antisocial , Femenino , Humanos , Masculino , Personalidad
6.
Am J Perinatol ; 34(4): 379-387, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27588932

RESUMEN

Objective The objective of this study was to determine the optimal dose of intravenous oxytocin administered during cesarean delivery (CD) to decrease the amount of blood loss. Methods Out of a total of 226 women presenting for CD, 189 patients were randomized into three groups by a computer-generated random number sequence table. Low-risk women with singleton term pregnancies undergoing scheduled CD were assigned to receive 20, 30, or 40 units (U) of oxytocin diluted in 500 mL of lactated Ringer solution intraoperatively. The primary outcome was the change in hemoglobin from pre-CD to post-CD. Results Overall, 63 women were assigned to each group. The primary outcome which was the drop in hemoglobin (1.4 ± 1.1 g/dL, 1.1 ± 0.8 g/dL, 1.0 ± 1.1 g/dL; p = 0.097) and the total calculated blood loss (798.6 ± 298.3 mL, 794.4 ± 313.5 mL, 820.2 ± 316.2 mL; p = 0.893) were not significantly different among the study groups. The incidence of intraoperative hypotension, postoperative systolic, and diastolic blood pressure changes was similar across the groups. Conclusion The amount of blood loss during CD was not significantly different among the three groups, thus the lowest dose of oxytocin infusion (20 U in 500 mL of lactated Ringer solution) seems to be an appropriate regimen.


Asunto(s)
Pérdida de Sangre Quirúrgica/prevención & control , Cesárea/efectos adversos , Complicaciones Intraoperatorias/prevención & control , Oxitócicos/administración & dosificación , Oxitocina/administración & dosificación , Administración Intravenosa , Adulto , Presión Sanguínea , Volumen Sanguíneo , Método Doble Ciego , Femenino , Hemoglobinas/metabolismo , Humanos , Hipotensión/etiología , Complicaciones Intraoperatorias/etiología , Periodo Posoperatorio , Embarazo
7.
East Mediterr Health J ; 22(7): 527-536, 2016 Oct 02.
Artículo en Inglés | MEDLINE | ID: mdl-27714747

RESUMEN

Information on the prevalence of influenza, circulating virus subtypes and seasonality is essential for selecting strains for annual vaccines and for planning immunization programmes. Data were obtained from the 13 sentinel surveillance sites throughout Egypt during 2012-2015. Laboratory-confirmed influenza was found in 13% of cases of influenza-like illness (ILI) and 18% of cases of severe acute respiratory infection (SARI); positivity for influenza was similar in cases of ILI and SARI in patients up to 15 years of age but increased for SARI and decreased for ILI in people aged ≥ 15 years. The most commonly observed influenza virus subtypes were B followed by A/ H3 in ILI cases, and A/H1N1 followed by B in SARI cases. The seasonality of influenza in ILI cases was November- February, and that in SARI cases was November-March, peaking in January.


Asunto(s)
Infecciones por Coronavirus/epidemiología , Subtipo H1N1 del Virus de la Influenza A/aislamiento & purificación , Subtipo H5N1 del Virus de la Influenza A/aislamiento & purificación , Virus de la Influenza A/clasificación , Virus de la Influenza A/aislamiento & purificación , Gripe Humana/epidemiología , Gripe Humana/virología , Coronavirus del Síndrome Respiratorio de Oriente Medio/aislamiento & purificación , Adolescente , Adulto , Anciano , Niño , Preescolar , Egipto/epidemiología , Femenino , Humanos , Lactante , Masculino , Persona de Mediana Edad , Prevalencia , Vigilancia de Guardia , Índice de Severidad de la Enfermedad , Adulto Joven
8.
Surg Technol Int ; 25: 195-200, 2014 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25433229

RESUMEN

Multiple gestations are on the rise with the advent of artificial reproductive technologies. Even with ovulation induction using clomiphene citrate alone, the twinning rate can reach up to 9 percent. We report a case of recurrent twin gestation after treatment with clomiphene citrate, with the second pregnancy being heterotopic. We also review, using Medline and PubMed, previously reported cases of recurrent twin gestation after treatment with clomiphene citrate published before June 2014. Patients undergoing ovulation induction for oligoovulation, anovulation, or unexplained infertility should always be counseled about the possibility of multiple gestation prior to the treatment including the probability, although low, of a heterotopic pregnancy.

9.
Sci Rep ; 14(1): 17503, 2024 07 30.
Artículo en Inglés | MEDLINE | ID: mdl-39080302

RESUMEN

A theoretical perspective on grandiose narcissism suggests four forms of it (sanctity, admiration, heroism, rivalry) and states that these forms conduce to different ways of thinking and acting. Guided by this perspective, we examined in a multinational and multicultural study (61 countries; N = 15,039) how narcissism forms are linked to cognitions and behaviors prompted by the COVID-19 pandemic. As expected, differences in cognitions and behaviors across narcissism forms emerged. For example, higher narcissistic rivalry predicted lower likelihood of enactment of COVID-19 prevention behaviors, but higher narcissistic sanctity predicted higher likelihood of enactment of COVID-19 prevention behaviors. Further, whereas the heroism, admiration, and rivalry narcissism forms acted in a typically antisocial manner, with high narcissism predicting greater endorsement of unfounded health beliefs, the sanctity form acted in a prosocial manner, with higher narcissism being linked to lower endorsement of unfounded COVID-19 health beliefs. Thus, the findings (a) support the idea of four narcissism forms acting differently, and (b) show that these differences reflect a double-edged sword, sometimes linking to an anti-social orientation, and sometimes linking to a pro-social orientation.


Asunto(s)
COVID-19 , Narcisismo , Humanos , COVID-19/psicología , COVID-19/epidemiología , Masculino , Femenino , Adulto , Pandemias , SARS-CoV-2 , Persona de Mediana Edad , Adulto Joven
10.
Am J Obstet Gynecol ; 205(2): 155.e7-11, 2011 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-21531372

RESUMEN

OBJECTIVE: To determine whether oxidative stress plays a role in the development of hypertension using a mouse model of fetal programming induced by endothelial nitric oxide synthase deficiency. STUDY DESIGN: Homozygous nitric oxide synthase knockout and wild type mice were cross-bred producing maternal (endothelial nitric oxide synthase+pat/-mat) and paternal (endothelial nitric oxide synthase+mat/-pat) heterozygous offspring. RNA from liver and kidney tissues of female pups were obtained at 14 weeks of age. Relative expression of the heat shock protein-B6, peroxiredoxin-3, superoxide dismutase-1, peroxisome proliferator-activated receptor gamma, nitric oxide synthase-1 and -2 were determined. RESULTS: In the kidneys, expression of nitric oxide synthase-2, peroxiredoxin-3, heat shock protein-B6, and superoxide dismutase-1 was up-regulated in endothelial nitric oxide synthase+pat/-mat but not in endothelial nitric oxide synthase+mat/-pat compared with wild type offspring. In the liver, there were no significant differences in the expression of nitric oxide synthase-1, nitric oxide synthase-2, peroxiredoxin, superoxide dismutase-1, or peroxisome proliferator-activated receptor gamma; however, heat shock protein-B6 was down-regulated in both heterozygotes offspring compared with wild type. CONCLUSION: The intrauterine environment alters oxidative pathways gene expression in the kidneys of offspring, which may be a mechanism in the development of adult hypertension.


Asunto(s)
Hipertensión/enzimología , Riñón/embriología , Estrés Oxidativo/fisiología , Factores de Edad , Animales , Animales Recién Nacidos , Modelos Animales de Enfermedad , Femenino , Proteínas de Choque Térmico/metabolismo , Tamaño de la Camada , Masculino , Ratones , Ratones Endogámicos C57BL , Ratones Noqueados , Óxido Nítrico Sintasa de Tipo II/metabolismo , Distribución Aleatoria , Especies Reactivas de Oxígeno/metabolismo , Sensibilidad y Especificidad , Estadísticas no Paramétricas , Superóxido Dismutasa/genética , Superóxido Dismutasa/metabolismo , Superóxido Dismutasa-1 , Regulación hacia Arriba
11.
Assessment ; 28(4): 1125-1135, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-32484407

RESUMEN

The Dark Triad (i.e., narcissism, psychopathy, Machiavellianism) has garnered intense attention over the past 15 years. We examined the structure of these traits' measure-the Dark Triad Dirty Dozen (DTDD)-in a sample of 11,488 participants from three W.E.I.R.D. (i.e., North America, Oceania, Western Europe) and five non-W.E.I.R.D. (i.e., Asia, Middle East, non-Western Europe, South America, sub-Saharan Africa) world regions. The results confirmed the measurement invariance of the DTDD across participants' sex in all world regions, with men scoring higher than women on all traits (except for psychopathy in Asia, where the difference was not significant). We found evidence for metric (and partial scalar) measurement invariance within and between W.E.I.R.D. and non-W.E.I.R.D. world regions. The results generally support the structure of the DTDD.


Asunto(s)
Maquiavelismo , Narcisismo , Trastorno de Personalidad Antisocial , Asia , Europa (Continente) , Femenino , Humanos , Masculino , América del Norte
12.
Int J Clin Pract ; 64(13): 1793-5, 2010 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21117282

RESUMEN

AIM: Impaired fasting glycaemia (IFG) is an indication for oral glucose tolerance test (OGTT). World health organisation and International Diabetes Federation define IFG as fasting plasma glucose (FPG) levels of 6.1­6.9 mmol/l. However, American Diabetes Association still recommends a range of 5.6­6.9 mmol/l as IFG.We performed an audit to assess the outcome of OGTT at various cut offs of FPG levels in patients at high risk of developing diabetes. METHODS: Laboratory dataon OGTT performed over a period of 1 year in a district general hospital were collected. Patients with FPG levels between 5.6 and 6.9 mmol/l were selected and the outcome was analysed. RESULTS: Our audit shows that in patients with FPG levels of 5.6­6.0 mmol/l, 19% had diabetes and 43% had impaired glucose tolerance (IGT). CONCLUSION: The percentage of subjects with abnormal OGTT in our study is much higher than that of Decode study [Diabetologica, 42 (1999) 647] (7% diabetes and 29% IGT). However, Decode study had included general population whereas our data were collected from subjects who are at high risk of developing diabetes. We conclude that in these subjects the lower cut off level of 5.6 mmol/l for FPG should be used as an indication for OGTT.


Asunto(s)
Glucemia/metabolismo , Diabetes Mellitus/diagnóstico , Intolerancia a la Glucosa/diagnóstico , Hiperglucemia/diagnóstico , Adulto , Anciano , Anciano de 80 o más Años , Ayuno/sangre , Femenino , Prueba de Tolerancia a la Glucosa , Humanos , Masculino , Persona de Mediana Edad , Estado Prediabético/diagnóstico , Valores de Referencia , Derivación y Consulta , Factores de Riesgo , Organización Mundial de la Salud
13.
Abdom Imaging ; 34(2): 243-50, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-18330616

RESUMEN

PURPOSE: To retrospectively assess the performance of MR imaging in the evaluation and triage of pregnant patients presenting with acute abdominal or pelvic pain. METHOD AND MATERIALS: MRI studies of pregnant patients who were referred for acute abdominal pain between 2001 and 2007 were included. MR images were retrospectively reviewed and compared with surgical and pathologic findings and clinical follow-up data. Analysis of imaging findings included evaluation of the visceral organs, bowel and mesentery, appendix (for presence of appendicitis), ovaries (detection and adnexal masses were evaluated), focal inflammation, presence of abscesses, and any other abnormal findings. RESULTS: A total of 118 pregnant patients were included. MR findings were inconclusive in 2 patients and were positive for acute appendicitis in 11 patients (n = 9 confirmed by surgery, n = 2 improved without surgery). One patient with inconclusive MR had surgically confirmed appendicitis; the other patient with inconclusive MR had surgically confirmed adnexal torsion. Other surgical/interventional diagnoses suggested by MR imaging were adnexal torsion (n = 4), abscess (n = 4), acute cholecystitis (n = 1), and gastric volvulus (n = 1). Two patients with MR diagnosis of torsion improved without surgery. One patient with MR diagnosis of abscess had biliary cystadenoma at surgery. The rest of the MR diagnoses above were confirmed surgically or interventionally. MR imaging was normal in 67 patients and demonstrated medically treatable etiology in 28 patients: adnexal lesions (n = 9), urinary pathology (n = 6), cholelithiasis (n = 4), degenerating fibroid (n = 3), DVT (n = 2), hernia (n = 1), colitis (n = 1), thick terminal ileum (n = 1), rectus hematoma (n = 1). Three of these patients had negative surgical exploration and one had adnexal mass excision during pregnancy. Other patients were discharged with medical treatment. The sensitivity, specificity, accuracy, positive predictive values (ppv), and negative predictive values (npv) of MR imaging for acute appendicitis, and surgical/ interventional diagnoses were 90.0% vs. 88.9%, 98.1% vs. 95.0%, 97.5% vs. 94.1%, 81.8% vs. 76.2%, 99.1% vs. 97.9%, respectively. CONCLUSION: MR imaging is an excellent modality for diagnosis of acute appendicitis and exclusion of diseases requiring surgical/interventional treatment. Therefore MR imaging is useful for triage of pregnant patients with acute abdominal and pelvic pain.


Asunto(s)
Abdomen Agudo/diagnóstico , Apendicitis/diagnóstico , Imagen por Resonancia Magnética , Dolor Pélvico/diagnóstico , Adolescente , Adulto , Femenino , Humanos , Imagen por Resonancia Magnética/métodos , Embarazo , Estudios Retrospectivos , Sensibilidad y Especificidad , Triaje , Adulto Joven
14.
Environ Monit Assess ; 157(1-4): 179-89, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-18843549

RESUMEN

The greater Cairo area suffers from extreme levels of gas and particulate phase air pollutants. In order to reduce the levels of ambient pollution, the USAID and the Egyptian Environmental Affairs Agency (EEAA) have supported the Cairo Air Improvement Project (CAIP). As part of this project, two intensive ambient monitoring studies were carried out during the period of February 22 to March 4 and October 27 to November 27, 1999. Volatile organic compounds (VOCs) were measured on a 24-h basis at six sampling stations during each of the intensive periods. During the February/March study, samples were collected daily, while in the October/November study samples were collected every other day. The six intensive measurement sites represented background levels, mobile source impacts, industrial impacts, and residential exposure. High levels of NMHC were observed at all locations. NMHC concentrations ranged from 365 ppb C at Helwan to 1,848 ppb C at El Qualaly during winter, 1999 and from 461 ppb C at Kaha to 2,037 ppb C at El Qualaly during fall, 1999. El Qualaly, the site chosen to represent mobile emissions, displayed the highest average NMHC concentrations of any site, by a factor of 2 or more. The highest mobile source contributions were estimated at this site. The major contributors to NMHC at all sites were mobile emissions, lead smelting, and compressed natural gas.


Asunto(s)
Contaminantes Atmosféricos/análisis , Atmósfera/química , Compuestos Orgánicos Volátiles/análisis , Alcanos/análisis , Derivados del Benceno/análisis , Ciudades , Egipto , Monitoreo del Ambiente , Material Particulado/análisis
15.
Biosystems ; 176: 41-51, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30611843

RESUMEN

Gene expression microarray classification is a crucial research field as it has been employed in cancer prediction and diagnosis systems. Gene expression data are composed of dozens of samples characterized by thousands of genes. Hence, an accurate and effective classification of such samples is a challenge. Machine learning techniques have been broadly utilized to build substantial and precise classification models. This paper proposes a new classification technique for gene expression data, which is called Modified k-nearest neighbor (MKNN). MKNN is applied in two scenarios namely; smallest modified KNN (SMKNN) and largest modified KNN (LMKNN). Both implementations are undertaken to enhance the performance of KNN. The key idea is to employ robust neighbors from training data by using a new weighting strategy. Several experiments have been performed on six different gene expression datasets. Experiments have shown that MKNN in its both scenarios outperforms traditional as well as recent ones. MKNN has been compared against (i) KNN, (ii) weighted KNN, (iii) support vector machine (SVM), (iv) fuzzy support vector machine, (v) brain emotional learning (BEL) in terms of classification accuracy, precision, and recall. On the other hand, results show that MKNN introduces smaller testing time than both KNN and weighted KNN.


Asunto(s)
Algoritmos , Interpretación Estadística de Datos , Regulación Neoplásica de la Expresión Génica , Modelos Estadísticos , Neoplasias/clasificación , Neoplasias/genética , Análisis por Conglomerados , Humanos , Aprendizaje Automático , Neoplasias/patología , Máquina de Vectores de Soporte
16.
J Womens Health Dev ; 2(1): 19-27, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31432025

RESUMEN

This is the case of a 38 year-old Lebanese woman G2P1, history of previous cesarean section, presenting at 30+5 weeks of gestation with acute left-sided flank pain and a two-day history of chills and dysuria. In light of the clinical presentation, the patient was initially diagnosed with pyelonephritis and managed accordingly; however, her clinical status deteriorated with worsening hypotension and lethargy despite resuscitative measures and a normal abdominal ultrasound. Failure to revive the patient eventually led to a cardiac arrest for which a peri-mortem cesarean section was performed at bedside. Upon abdominal entry, an actively-bleeding ruptured splenic artery aneurysm (SAA) was identified, for which massive transfusion protocol was activated, and the patient was transferred to the operating room. The patient had a complicated postoperative course, the fetus was stillborn, and she was discharged home after 6 months of hospital stay. In view of the high mortality and morbidity associated with ruptured SAA in pregnancy, early recognition and prompt intervention are crucial for maternal and fetal benefit.

17.
Case Rep Obstet Gynecol ; 2019: 4980610, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-32089914

RESUMEN

Intrahepatic cholestasis of pregnancy (ICP) is a condition that usually affects the 3rd trimester-pregnant women and is associated with adverse pregnancy outcomes. We present a 31-year-old G2P1 patient with symptoms of ICP as early as 10 weeks of gestation (WG). Her pruritis was initially attributed to eczema. Due to the intensity of her discomfort and failure of topical treatment, ICP was suspected, total bile acid salt levels were taken and ursodeoxycholic acid was subsequently started at 18 WG. The patient was followed closely during her pregnancy to adjust the dose of the medication accordingly. Induction of labor was performed at 37 WG without complications. This case demonstrated the importance of clinical suspicion in the setting of such symptomatology in order not to miss or delay treatment of threatening conditions such as ICP.

18.
Am J Obstet Gynecol ; 199(3): 250.e1-7, 2008 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-18771972

RESUMEN

OBJECTIVE: The objective of the study was to investigate the transgenerational effect of fetal vascular programming STUDY DESIGN: Homozygous NOS3 knockout and wild type controls (NOS3+/+WT) were cross-bred to obtain heterozygous offspring that developed in (KO-/-) mothers lacking a functional NOS3 (KOM) vs wild-type control mothers (KOP). The first-generation KOM(+/-) and KOP(+/-) female mice were then bred with WT(+/+) males to obtain a second generation (F2). F2 offspring were genotyped and WT(+/+)-F2 mice were then used for in vivo blood pressure and in vitro vascular reactivity studies. RESULTS: WT-F2 mice born to KOM mothers (KOM-F2WT) had significantly higher systolic blood pressure, mean arterial pressure, and pulse pressure, compared with WT-F2 born to KOP mothers. Male KOM-F2WT offspring had significantly increased response to phenylephrine (PE), compared with male KOP-F2WT. Male offspring had increased contractile responses to PE when compared with female. Acetylcholine responses were decreased in female KOM-F2WT, compared with female KOP-F2WT, but the difference was not statistically significant CONCLUSION: Our findings support a transgenerational effect of fetal programming on the vascular phenotype and suggest possible gender specific adaptation.


Asunto(s)
Presión Sanguínea/fisiología , Desarrollo Fetal/fisiología , Vasoconstricción/fisiología , Animales , Animales Recién Nacidos , Presión Sanguínea/genética , Peso Corporal , Femenino , Desarrollo Fetal/genética , Masculino , Ratones , Ratones Noqueados , NG-Nitroarginina Metil Éster/farmacología , Óxido Nítrico Sintasa/deficiencia , Fenotipo , Vasoconstricción/genética
19.
J Negat Results Biomed ; 7: 11, 2008 Nov 28.
Artículo en Inglés | MEDLINE | ID: mdl-19040739

RESUMEN

OBJECTIVE: To determine the impact of pre-operative and intra-operative ilioinguinal and iliohypogastric nerve block on post-operative analgesic utilization and length of stay (LOS). METHODS: We conducted a prospective randomized double-blind placebo controlled trial to assess effectiveness of ilioinguinal-iliohypogastric nerve block (IINB) on post-operative morphine consumption in female study patients (n = 60). Patients undergoing laparotomy via Pfannenstiel incision received injection of either 0.5% bupivacaine + 5 mcg/ml epinephrine for IINB (Group I, n = 28) or saline of equivalent volume given to the same site (Group II, n = 32). All injections were placed before the skin incision and after closure of rectus fascia via direct infiltration. Measured outcomes were post-operative morphine consumption (and associated side-effects), visual analogue pain scores, and hospital length of stay (LOS). RESULTS: No difference in morphine use was observed between the two groups (47.3 mg in Group I vs. 45.9 mg in Group II; p = 0.85). There was a trend toward lower pain scores after surgery in Group I, but this was not statistically significant. The mean time to initiate oral narcotics was also similar, 23.3 h in Group I and 22.8 h in Group II (p = 0.7). LOS was somewhat shorter in Group I compared to Group II, but this difference was not statistically significant (p = 0.8). Side-effects occurred with similar frequency in both study groups. CONCLUSION: In this population of patients undergoing inpatient surgery of the female reproductive tract, utilization of post-operative narcotics was not significantly influenced by IINB. Pain scores and LOS were also apparently unaffected by IINB, indicating a need for additional properly controlled prospective studies to identify alternative methods to optimize post-surgical pain management and reduce LOS.


Asunto(s)
Analgésicos Opioides , Morfina , Bloqueo Nervioso , Dolor Postoperatorio/prevención & control , Adulto , Método Doble Ciego , Femenino , Procedimientos Quirúrgicos Ginecológicos , Humanos , Laparotomía , Persona de Mediana Edad
20.
Clin Obstet Gynecol ; 51(4): 775-86, 2008 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-18981802

RESUMEN

Cerebral palsy (CP) affects 2/1000 live-born children. Multiple antenatal factors, including preterm delivery, low birth weight, infection/inflammation, multiple gestation, and other pregnancy complications, are mostly associated with CP in both the preterm and term infant, with birth asphyxia playing a minor role. Owing to the increasing survival of the very preterm and very low birth weight infant secondary to improvements in neonatal and obstetric care, the incidence of CP may be increasing. The focus of this paper is to explore antenatal antecedents as etiologies of CP and the impact of obstetric care on the prevention of CP.


Asunto(s)
Asfixia Neonatal/epidemiología , Traumatismos del Nacimiento/epidemiología , Parálisis Cerebral/epidemiología , Parálisis Cerebral/etiología , Complicaciones del Trabajo de Parto/epidemiología , Complicaciones del Embarazo/epidemiología , Asfixia Neonatal/complicaciones , Traumatismos del Nacimiento/complicaciones , Parálisis Cerebral/mortalidad , Comorbilidad , Femenino , Humanos , Incidencia , Lactante , Recién Nacido de Bajo Peso , Recién Nacido , Masculino , Obstetricia/normas , Embarazo , Prevalencia , Factores de Riesgo , Análisis de Supervivencia
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