Short- and long-term clinical outcomes of self-expandable metal stents inserted for colorectal obstruction and efficacy of different insertion techniques.

OBJECTIVES: (1) To evaluate the short- and long-term clinical outcomes of patients after colorectal stent placement and (2) to assess the safety and efficacy of the stents for the resolution of colorectal obstruction according to the insertion technique. METHODS: Retrospective cohort study which included 177 patients with colonic obstruction who underwent insertion of a stent. RESULTS: A total of 196 stents were implanted in 177 patients. Overall, the most common cause of obstruction was colorectal cancer (89.3%). Ninety-two stents (47%) were placed by radiologic technique and 104 (53%) by endoscopy under fluoroscopic guidance. Technical success rates were 95% in both groups. Clinical success rates were 77% in the radiological group and 81% in the endoscopic group (p>0.05). The rate of complications was higher in the radiologic group compared with the endoscopic group (38% vs 20%, respectively; p=0.006). Among patients with colorectal cancer (158), 65 stents were placed for palliation but 30% eventually required surgery. The multivariate analysis identified three factors associated with poorer long-term survival: tumor stage IV, comorbidity and onset of complications. CONCLUSIONS: Stents may be an alternative to emergency surgery in colorectal obstruction, but the clinical outcome depends on the tumor stage, comorbidity and stent complications. The rate of definitive palliative stent placement was high; although surgery was eventually required in 30%. Our study suggests that the endoscopic method of stent placement is safer than the radiologic method.

Quality of Life and Alleviation of Symptoms After Breast Reduction for Macromastia in Obese Patients: Is Surgery Worth It?

BACKGROUND: Breast hypertrophy can cause a variety of symptoms and affect lifestyle and quality of life. Breast reduction, being the most effective treatment, is sometimes difficult to establish as standard treatment in obese patients (difficulties to differentiate symptoms from macromastia or from obesity, higher rate of complications). AIM: To evaluate the effect of reduction mammaplasty (quality of life and symptoms) in obese patients comparing with non-obese. METHODS: This is a prospective study of patients undergoing reduction mammaplasty. Patients were allocated in non-obese (BMI < 29) and obese (BMI > 30). Demographic data, comorbidities, specific symptoms questionnaire, data from the surgical procedure, Spanish version of the Health-Related Quality of Life (SF-36) questionnaire, complications and sequels were recorded and collected before the operation and at 1 month and 1 year after. Chi-square, Fisher's exact t test, McNemar, Mann-Whitney U and Kruskal-Wallis tests were used for statistical analysis. RESULTS: One hundred twenty-one consecutive patients were operated on; 54 (44.6 %) obese and 67 (55.4 %) non-obese. The average age of patients was 40.7 (18-78), average volume of resected tissue was 1.784 g (401-5.790), and average hospital stay was 2.94 days (1-11). There were no differences between obese and normal BMI patients with regard to length of hospital stay, complications, sequels, or reoperations. Symptoms improved in both groups. Physical and mental components of the SF-36 improved at 1 year in both groups (p < 0.001). The mental health component improved at 1 month (p < 0.001) in both groups. CONCLUSIONS: Obese patients should be considered for reduction mammaplasty surgery in the same way as women of normal weight. LEVEL OF EVIDENCE III: This journal requires that authors assign a level of evidence to each submission to which Evidence-Based Medicine rankings are applicable. This excludes Review Articles, Book Reviews, and manuscripts that concern Basic Science, Animal Studies, Cadaver Studies, and Experimental Studies. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Uncontrolled and masked uncontrolled blood pressure in treated pregnant women with chronic hypertension and risk for preeclampsia/eclampsia.

To analyze the relationship between the level of BP achieved with treatment and the risk for development of preeclampsia/eclampsia (PE), we conducted a historical cohort study on 149 consecutive pregnant women with treated chronic hypertension, evaluated between January 1, 2016, and November 31, 2022. According to office BP readings and ambulatory blood pressure monitoring (ABPM) performed after 20 weeks of gestation, the cohort was classified in controlled hypertension, white-coat uncontrolled hypertension, masked uncontrolled hypertension and sustained hypertension. Risks for the development of PE were estimated using logistic regression. One hundred and twenty-four pregnant women with a control BP evaluation were included in this analysis. The rates of PE were 19.4%, 27.3%, 44.8% and 47.1% for controlled, white-coat uncontrolled, masked uncontrolled and sustained uncontrolled hypertension, respectively. Compared with women with controlled hypertension, the relative risk for PE increased markedly in women with sustained uncontrolled (OR 3.69, 95% CI, 1.19-11.45) and masked uncontrolled (OR 3.38, 95% CI, 1.30-11.45) hypertension, but not in those with white-coat uncontrolled (OR 1.56 95% CI, 0.36-6.70); adjustment for covariates did not modify the results. Each mmHg higher of systolic and diastolic daytime ABPM increased the relative risk for PE ~4% and ~5%, respectively. Each mmHg higher of systolic and diastolic nocturnal BP increased the risk ~5% and ~6%, respectively. When these risks were adjusted for ABPM values in opposite periods of the day, only nocturnal ABPM remained as a significant predictor. In conclusion, masked uncontrolled hypertension implies a substantial risk for the development of PE, comparable to those of sustained uncontrolled. The presence of nocturnal hypertension seems important.

Impact of nutritional and educational support on home enteral nutrition.

BACKGROUND: Home Enteral Nutrition (HEN) is used to prevent or correct malnutrition in outpatients. Due to the complexity of this process, the indication, follow-up, and results of an educational program of HEN patients was evaluated. METHODS: A prospective, observational, real-life, multicenter study was performed in 21 Spanish Hospital. Patients receiving HEN by nasogastric tube or ostomy were included. The following variables were collected: age, gender, HEN indication, type of formula, nutritional requirements, laboratory variables, complications, and quality standards of the educational program. To calculate the energy and protein requirements, the FAO/WHO/UNU formula was used considering the adjusted weight of the patients. All data were analyzed using SPSS.24. RESULTS: 414 patients were included. Most conditions diagnosed were neurodegenerative diseases (64.8%). 100 (25.3%) were diabetic. The mean weight was 59.3 ± 10.4 kg and BMI 22.6 ± 3.2. Moderate protein-calorie malnutrition was predominant at baseline (46.4%). Improvement in nutritional status at six months was recorded in more than 75% of patients (p < 0.05). Tolerance problems, diarrhea and abdominal distension fell between the 3- and 6-month visits (p < 0.05). Patients who received intermittent EN had fewer tolerance-related effects (OR 0.042; 95% CI 0.006-0.279) and less diarrhoea (OR 0.042; 95% CI 0.006-0.279). At the baseline and 6-month visits, compliance with the educational measures proposed by the prescriber was ≥ 99%. CONCLUSION: The nutritional assessment to prescribe individualized HEN to each patient, together with educational measures and training in the proper use of this treatment for both patients and trainers, improves nutritional status and reduces the onset of adverse events.

Relevance of GSTM1, GSTT1, and GSTP1 gene polymorphisms to gastric cancer susceptibility and phenotype.

Human glutathione S-transferases (GSTs) are phase II metabolizing enzymes that play a key role in protecting against cancer by detoxifying numerous potentially cytotoxic/genotoxic compounds. The genes encoding the human GST isoenzymes GSTM(mu)1, GSTT(theta)1 and GSTP(pi)1 harbour polymorphisms, which have been considered important modifiers of the individual risk for environmentally induced cancers such as gastric cancer (GC). However, results are inconsistent among studies from different geographic areas and ethnic groups. Our goal was to perform a nationwide, case-control study in Spain to evaluate the relevance of several functional GST gene polymorphisms and environmental factors to GC risk and phenotype. DNA from 557 GC patients and 557 sex- and age-matched healthy controls (HC) was typed for two deletions in the GSTM1 and GSTT1 genes and two SNPs in the GSTP1 gene (rs1695 and rs1138272) using polymerase chain reaction-restriction fragment length polymorphism methods. Logistic regression analysis identified Helicobacter pylori infection with CagA strains [odds ratio (OR): 2.36; 95% confidence interval (CI): 1.78-3.15], smoking habit (OR: 2.10; 95% CI: 1.48-2.97) and family history of GC (OR: 3.2; 95% CI: 2.02-5.16) as independent risk factors for GC. No differences in the frequencies of GSTM1 or GSTT1 null genotypes were observed between cases and controls (GSTM1: 50.8% vs. 48%; GSTT1: 21.5% vs. 21%). Moreover, simultaneous carriage of both, the GSTM1 and the GSTT1 null genotypes, was almost identical in both groups (10.7% in GC vs. 10.6% in HC). In addition, no significant differences in GSTP1 Ile105Val (rs1695) and GSTP1 Val114Ala (rs1138272) genotype distribution were observed between GC patients and controls. Subgroup analysis for age, gender, Helicobacter pylori status, smoking habits, family history of GC, anatomic location and histological subtype revealed no significant association between GST variants and GC risk. Our results show that the GST polymorphisms evaluated in this study are not relevant when determining the individual susceptibility to GC or phenotype in a South-European population.

Neurodevelopmental assessment of infants born to mothers with hypertensive disorder of pregnancy at six months of age.

Infant neurodevelopment is a complex process which may be affected by different events during pregnancy, such as hypertensive disorders of pregnancy (HDP). We conducted a prospective cohort study to compare the prevalence of neurodevelopmental disorders in infants born to mothers with and without HDP at six months of age. Participants attended the Health Observatory of Instituto de Desarrollo e Investigaciones Pediátricas "Prof. Dr. Fernando E. Viteri" during 2018 and 2019. Infant neurodevelopment was assessed with the Bayley Scales of Infant and Toddler Development-Third Edition (Bayley-III). Data were analyzed using Chi-square, Student's t-test and Mann-Whitney test. Of the 132 participating infants, 68 and 64 were born to mothers with and without HDP, respectively. At six months, the prevalence of risk of neurodevelopmental delay was significantly higher in infants born to mothers with than without HDP (27.9% vs. 9.4%; p = 0.008) (odds ratio, 3.71; 95% confidence interval, 1.30; 12.28). In conclusion, infants born to mothers with HDP had three times increased risk of neurodevelopmental delay at six months of age.

Reliability of goniometric measurements in children with cerebral palsy: a comparative analysis of universal goniometer and electronic inclinometer. A pilot study.

BACKGROUND: Even though technological progress has provided us with more and more sophisticated equipment for making goniometric measurements, the most commonly used clinical tools are still the universal goniometer and, to a lesser extent, the inclinometer. There is, however, no published study so far that uses an inclinometer for measurements in children with cerebral palsy (CP). The objective of this study was two-fold: to independently assess the intra and inter-examiner reliability for measuring the hip abduction range of motion in children with CP using two different instruments, the universal two-axis goniometer and electronic inclinometer. A pool of 5 examiners with different levels of experience as paediatric physiotherapists participated. The study did not compare both instruments because the measurement procedure and the hip position were different for each. METHODS: A prospective, observational study of goniometery was carried out with 14 lower extremities of 7 children with spastic CP. The inclinometer study was carried out with 8 lower extremities of 4 children with spastic CP. This study was divided into two independent parts: a study of the reliability of the hip abduction range of motion measured with a universal goniometer (hip at 0° flexion) and with an electronic inclinometer (hip at 90° flexion). The Intraclass Correlation Coefficient (ICC) was calculated to analyse intra and inter-examiner agreement for each instrument. RESULTS: For the goniometer, the intra-examiner reliability was excellent (>0.80), while the inter-examiner reliability was low (0.375 and 0.475). For the inclinometer, both the intra-examiner (0.850-0.975) and inter-examiner reliability were excellent (0.965 and 0.979). CONCLUSIONS: The inter-examiner reliability for goniometric measurement of hip abduction in children with CP was low, in keeping with other results found in previous publications. The inclinometer has proved to be a highly reliable tool for measuring the hip abduction range of motion in children with CP, which opens up new possibilities in this field, despite having some measurement limitations.

Real-life study of the effectiveness of a high calorie and high protein formula in the maintenance and improvement of nutritional state in patients with an indication of long-term enteral nutrition. / Estudio en vida real de efectividad de una fórmula hipercalórica hiperproteica en el mantenimiento y mejora del estado nutricional en pacientes con indicación de nutrición enteral a largo plazo.

The selection of the most appropriate formula in long-term home enteral nutrition is a controversial issue. Our objective was to study a high protein hypercaloric enteral nutrition formula in patients with long-term feeding (180 days). METHODS: Prospective observational multicenter real-life study with high-protein hypercaloric formula (2kcal/ml and 20% protein). General, anthropometric, analytical and quality of life data were collected by visual analog scale of the European Quality of Life-5 Dimensions at the beginning, 60, 120 and 180 days. Gastrointestinal tolerance was assessed with a visual analog scale and Bristol Stool Scale and the risk of malnutrition was assessed using NRS-2002. RESULTS: 51 patients (88.2% men, mean age 62.0 years), with oncological diseases in 72.5%. No differences in anthropometric data were observed, although the percentage of patients at risk of malnutrition according to NRS 2002 was reduced from 75% to 8.3% (p<0.0001). No differences were observed in albumin, prealbumin, transferrin, lymphocytes or hematocrit. The quality of life improved from 3.84 (1.27) to 5.37 (1.12) on the visual analog scale (p<0.0001). A reduction in gastrointestinal symptoms was observed throughout the period of enteral nutrition. Both the number and percentage of stools considered normal according to the Bristol scale remained stable. CONCLUSION: Our study supports that the use of high-protein hypercaloric formulas during a 6-month nutritional treatment allows an adequate nutritional evolution without risk of dehydration and with a good tolerance, even improvement of gastrointestinal symptoms, and can contribute to an improvement in the quality of lifetime.

A study of dietary patterns in the Mexican-American population and their association with obesity.

OBJECTIVE: Data from the National Health and Nutrition Examination Survey 2001-2002 indicate that prevalence of overweight and obesity continues to rise among Mexican Americans. Little is know about the dietary factors associated with this trend. Ethnic groups have different dietary patterns based on their geographical locations and cultural influences. We examined the dietary patterns of Mexican Americans and their association with total and central obesity. We hypothesized that Mexican-American adults following a traditional diet would have a lower prevalence of obesity than those following a more typical American diet. SUBJECTS: Data from the National Health and Nutrition Examination Survey 2001-2002 included 659 Mexican-American adults, ages 18 years and older. EXPERIMENTAL DESIGN: Dietary patterns were defined by cluster analysis of food group variables, expressed as percentage contribution to total energy intake. Obesity was assessed by body mass index (calculated as kg/m2) and central obesity by waist circumference. RESULTS: We defined four dietary patterns, each named for the food groups that were most predominant relative to the other clusters: poultry and alcohol, milk and baked products, traditional Mexican, and meat. Surprisingly, we did not identify a clear "healthy pattern" group in this population, as has been generally observed in other ethnic groups. Although the traditional Mexican diet contains relatively high intakes of legumes and dietary fiber, it also was high in cholesterol. Contrary to our hypothesis, those consuming the traditional Mexican diet pattern had high BMI and waist circumference values, which did not differ significantly from other groups. CONCLUSION: In this representative population of Mexican-American adults, we identified distinct dietary patterns, but these were not significantly associated with obesity. Rather, obesity was prevalent in all diet groups. More details on possible changes within the traditional pattern, including use of fast food vs home-prepared Mexican foods, are needed to better understand how diet can be associated with obesity in this population.

Relationship between physician and industry in Aragon (Spain).

OBJECTIVE: To describe the relationship between industry and physicians and to analyze the physician characteristics associated with the probability of receiving benefits from industry in Aragon (Spain). METHODS: We carried out an observational, cross-sectional study in which Aragonese physicians (north-east region in Spain) from public and private settings completed an anonymous questionnaire on a web page between June and November 2008. Visits/month with industry, samples, gifts, reimbursements and payments were used as dependant variables in the regression analyses. Year of medical license, specialty, work setting, time spent on direct care, articles read/month and being a resident's tutor were used as independent variables. RESULTS: A total of 659 questionnaires were considered valid for the analysis. Overall, 87% (n=573) of the respondents reported they had received some benefit in the previous year and 90.1% (n=593) reported having held meetings with industry representatives monthly. Non-clinical specialists received fewer gifts (odds ratio [OR]=0.38; 95% confidence interval [95%CI]: 0.18-0.77), reimbursements (OR=0.14; 95%CI: 0.06-0.35) and payments (OR=0.30; 95%CI: 0.13-0.74) than their clinical colleagues. The probability of receiving reimbursements (OR=0.37; 95%CI: 0.15-0.89) and payments (OR=0.39; 95%CI: 0.20-0.77) was lower in primary care physicians. CONCLUSIONS: This study, performed in a sample of physicians from a southern European region, demonstrates differences in the intensity of the physician-industry relationship depending on physician specialty and work setting. These results provide important information for improving transparency and for future research on the appropriateness and efficiency of prescription in Spain and other countries with similar health systems.

Prognostic role of host cyclooxygenase and cytokine genotypes in a Caucasian cohort of patients with gastric adenocarcinoma.

BACKGROUND: Genetic factors influencing the prognosis of gastric adenocarcinoma (GAC) are not well known. Given the relevance of cytokines and other pro-inflammatory mediators in cancer progression and invasiveness, we aimed to assess the prognostic role of several functional cytokine and cyclooxygenase gene polymorphisms in patients with GAC. METHODOLOGY: Genomic DNA from 380 Spanish Caucasian patients with primary GAC was genotyped for 23 polymorphisms in pro-inflammatory (IL1B, TNFA, LTA, IL6, IL12p40), anti-inflammatory (IL4, IL1RN, IL10, TGFB1) cytokine, and cyclooxygenase (PTGS1 and PTGS2) genes by PCR, RFLP and TaqMan assays. Clinical and histological information was collected prospectively. Survival curves were estimated by the Kaplan-Meier method and compared using the log rank test. Outcome was determined by analysis of Cox proportional hazards, adjusting for confounding factors. RESULTS: The median follow-up period and median overall survival (OS) time were 9.9 months (range 0.4-120.3) and 10.9 months (95% CI: 8.9-14.1), respectively. Multivariate analysis identified tumor stages III (HR, 3.23; 95% CI:2-5.22) and IV (HR, 5.5; 95% CI: 3.51-8.63) as independent factors associated with a significantly reduced OS, whereas surgical treatment (HR: 0.44; 95%CI: 0.3-0.6) was related to a better prognosis of the disease. Concerning genetic factors, none of the 23 polymorphisms evaluated in the current study did influence survival. Moreover, no gene-environment interactions on GAC prognosis were observed. CONCLUSIONS: Our results show that, in our population, the panel of selected pro- and anti-inflammatory cytokine, and cyclooxygenase gene polymorphisms are not relevant in determining the prognosis of gastric adenocarcinoma.

Estudio en vida real de efectividad de una fórmula hipercalórica hiperproteica en el mantenimiento y mejora del estado nutricional en pacientes con indicación de nutrición enteral a largo plazo / Real-life study of the effectiveness of a high calorie and high protein formula in the maintenance and improvement of nutritional state in patients with an indication of long-term enteral nutrition

La selección de la fórmula más adecuada en nutrición enteral domiciliaria a largo plazo es un tema controvertido. Nuestro objetivo fue estudiar una fórmula hipercalórica hiperproteica en pacientes con alimentación exclusivamente con sonda a largo plazo (180 días). MÉTODOS: Estudio multicéntrico observacional prospectivo en vida real con fórmula hipercalórica hiperproteica (2kcal/ml y 20% de proteínas). Se recogieron datos generales, antropométricos, analíticos y de calidad de vida mediante escala analógica visual del European Quality of Life-5 Dimensions al inicio, 60, 120 y 180 días. La tolerancia gastrointestinal se evaluó con una escala analógica visual y escala de heces de Bristol y la valoración del riesgo de desnutrición mediante NRS-2002. RESULTADOS: Un total de 51 pacientes (88,2% varones, edad media de 62,0 años), con patología oncológica en el 72,5%. No hubo diferencias en datos antropométricos, aunque sí se redujo el porcentaje de pacientes con riesgo de desnutrición del 75 al 8,3% (p < 0,0001). No se observaron diferencias en albúmina, prealbúmina, transferrina, linfocitos o hematocrito. La calidad de vida mejoró de 3,84 (1,27) a 5,37 (1,12) en la escala analógica visual (p < 0,0001). Se observó una reducción de la sintomatología gastrointestinal a lo largo del seguimiento. Tanto el número como el porcentaje de deposiciones consideradas normales según la escala de Bristol se mantuvieron estables. CONCLUSIÓN: Nuestro estudio apoya que el empleo de fórmulas hipercalóricas hiperproteicas durante un tratamiento nutricional a 6 meses permite una adecuada evolución nutricional sin riesgo de deshidratación y con una buena tolerancia, incluso mejoría de sintomatología gastrointestinal, y puede contribuir a una mejora en la calidad de vida

The selection of the most appropriate formula in long-term home enteral nutrition is a controversial issue. Our objective was to study a high protein hypercaloric enteral nutrition formula in patients with long-term feeding (180 days). METHODS: Prospective observational multicenter real-life study with high-protein hypercaloric formula (2kcal/ml and 20% protein). General, anthropometric, analytical and quality of life data were collected by visual analog scale of the European Quality of Life-5 Dimensions at the beginning, 60, 120 and 180 days. Gastrointestinal tolerance was assessed with a visual analog scale and Bristol Stool Scale and the risk of malnutrition was assessed using NRS-2002. RESULTS: 51 patients (88.2% men, mean age 62.0 years), with oncological diseases in 72.5%. No differences in anthropometric data were observed, although the percentage of patients at risk of malnutrition according to NRS 2002 was reduced from 75% to 8.3% (p < 0.0001). No differences were observed in albumin, prealbumin, transferrin, lymphocytes or hematocrit. The quality of life improved from 3.84 (1.27) to 5.37 (1.12) on the visual analog scale (p < 0.0001). A reduction in gastrointestinal symptoms was observed throughout the period of enteral nutrition. Both the number and percentage of stools considered normal according to the Bristol scale remained stable. CONCLUSION: Our study supports that the use of high-protein hypercaloric formulas during a 6-month nutritional treatment allows an adequate nutritional evolution without risk of dehydration and with a good tolerance, even improvement of gastrointestinal symptoms, and can contribute to an improvement in the quality of lifetime

Female genital morphology and mating behavior of Orchestina (Arachnida: Araneae: Oonopidae).

The unusual reproductive biology of many spider species makes them compelling targets for evolutionary investigations. Mating behavior studies combined with genital morphological investigations help to understand complex spider reproductive systems and explain their function in the context of sexual selection. Oonopidae are a diverse spider family comprising a variety of species with complex internal female genitalia. Data on oonopid phylogeny are preliminary and especially studies on their mating behavior are very rare. The present investigation reports on the copulatory behavior of an Orchestina species for the first time. The female genitalia are described by means of serial semi-thin sections and scanning electron microscopy. Females of Orchestina sp. mate with multiple males. On average, copulations last between 15.4 and 23.54min. During copulation, the spiders are in a position taken by most theraphosids and certain members of the subfamily Oonopinae: the male pushes the female back and is situated under her facing the female's sternum. Males of Orchestina sp. possibly display post-copulatory mate-guarding behavior. The female genitalia are complex. The genital opening leads into the uterus externus from which a single receptaculum emerges. The dorsal wall of the receptaculum forms a sclerite serving as muscle attachment. A sclerotized plate with attached muscles lies in the posterior wall of the uterus externus. The plate might be used to lock the uterus during copulation. The present study gives no direct evidence for cryptic female choice in Orchestina sp. but suggests that sexual selection occurs in the form of sperm competition through sperm mixing.

Chelicerae as male grasping organs in scorpions: sexual dimorphism and associated behaviour.

Specialised structures that enable males to grasp females during sexual interactions are highly susceptible to selection and thus diverge relatively rapidly over evolutionary time. These structures are often used to test hypotheses regarding sexual selection such as sexually antagonistic co-evolution and sexual selection by female choice. In the present study, we determine whether there is a relationship between a novel record of scorpion sexual dimorphism, the sexual dimorphism of chelicerae (CSD), and the presence of the mating behaviour termed "cheliceral grip" (CG). The presence of both traits in the order Scorpiones is also reviewed from a phylogenetic perspective. The results confirm a strong relationship between CSD and the presence of CG. The morphological and behavioural patterns associated with "CSD-CG" are opposed to the predictions postulated by the hypothesis of sexually antagonistic co-evolution. However, if the female shows resistance after the deposition of the spermatophore, the possibility that the male exerts pressure as a "cryptic form" of coercion to prevent the interruption of mating cannot be ruled out completely. Female choice by "mechanical fit" could be another explanation for some aspects of the CG's contact zone. The possibility that the "CG-CSD" complex has evolved under natural selection in order to ensure sperm transfer is also considered.

Short- and long-term clinical outcomes of self-expandable metal stents inserted for colorectal obstruction and efficacy of different insertion techniques / Resultados a corto y largo plazo de la colocación de prótesis metálicas autoexpandibles en la obstrucción colorrectal y eficacia de las diferentes técnicas de inserción

Objectives: (1) To evaluate the short- and long-term clinical outcomes of patients after colorectal stent placement and (2) to assess the safety and efficacy of the stents for the resolution of colorectal obstruction according to the insertion technique. Methods: Retrospective cohort study which included 177 patients with colonic obstruction who underwent insertion of a stent. Results: A total of 196 stents were implanted in 177 patients. Overall, the most common cause of obstruction was colorectal cancer (89.3%). Ninety-two stents (47%) were placed by radiologic technique and 104 (53%) by endoscopy under fluoroscopic guidance. Technical success rates were 95% in both groups. Clinical success rates were 77% in the radiological group and 81% in the endoscopic group (p>0.05). The rate of complications was higher in the radiologic group compared with the endoscopic group (38% vs 20%, respectively; p=0.006). Among patients with colorectal cancer (158), 65 stents were placed for palliation but 30% eventually required surgery. The multivariate analysis identified three factors associated with poorer long-term survival: tumor stage IV, comorbidity and onset of complications. Conclusions: Stents may be an alternative to emergency surgery in colorectal obstruction, but the clinical outcome depends on the tumor stage, comorbidity and stent complications. The rate of definitive palliative stent placement was high; although surgery was eventually required in 30%. Our study suggests that the endoscopic method of stent placement is safer than the radiologic method

Objetivos: 1) Evaluar los resultados clínicos a corto y largo plazo de los pacientes después de la colocación de una prótesis a nivel colorrectal y 2) Evaluar la eficacia y la seguridad de las prótesis en la resolución de la obstrucción en función de la técnica de inserción. Métodos: Estudio de cohortes retrospectivo que incluyó 177 pacientes con obstrucción cólica que fueron tratados incialmente con colocación de prótesis. Resultados: Se colocaron 196 prótesis en 177 pacientes. La causa más frecuente de obstrucción fue el cáncer colorrectal (89,3%). Noventa y dos prótesis (47%) se colocaron mediante técnica radiológica y 104 (53%) mediante endoscopia bajo guía fluoroscópica. Las tasas de éxito técnico fueron del 95% en ambos grupos. Las tasas de éxito clínico fueron del 77% en el grupo radiológico y del 81% en el grupo endoscópico (p>0,05). La tasa de complicaciones fue mayor en el grupo radiológico en comparación con el grupo endoscópico (38 vs. 20%, respectivamente; p=0,006). Entre los pacientes con cáncer colorrectal (158), 65 prótesis se colocaron con un fin paliativo, pero el 30% requirió finalmente cirugía. El análisis multivariante identificó 3 factores asociados a una peor supervivencia: estadio tumoral IV, comorbilidad y aparición de complicaciones. Conclusiones: Las prótesis pueden ser una alternativa a la cirugía urgente en la obstrucción colorrectal, pero el resultado clínico depende del estadio tumoral, de la comorbilidad y de las complicaciones de la prótesis. La tasa de colocación de prótesis paliativa definitiva fue alta; aunque en un 30% se requirió cirugía, finalmente. Nuestro estudio sugiere que el método de implantación con visión endoscópica es más seguro que el método radiológico

Chemical defense in harvestmen (arachnida, opiliones): do benzoquinone secretions deter invertebrate and vertebrate predators?

Two alkylated 1,4-benzoquinones were identified from the defensive secretion produced by the neotropical harvestman Goniosoma longipes (Gonyleptidae). They were characterized as 2,3-dimethyl-1,4-benzoquinone and 2-ethyl-3-methyl-1,4-benzoquinone. We tested the effectiveness of these benzoquinone secretions against several predator types, including invertebrates and vertebrates. Different predators were exposed to the harvestmen's gland secretion or to distilled water in laboratory bioassays. Our results indicate that secretions containing the 1,4-benzoquinones released by G. longipes can be an effective defense against predation, and that the effectiveness of the secretion is dependent on the predator type. The scent gland secretion repelled seven ant species, two species of large wandering spiders, and one frog species, but was not an effective defense against an opossum. Our study also demonstrates that the scent gland secretion of G. longipes can work as a chemical shield preventing the approach of three large predatory ants for at least 10 min. The chemical shield may protect the harvestman against successive attacks of the same ant worker and also allow the harvestman to flee before massive ant recruitment. Our data support the suggestion that chemical defenses may increase survival with some but not all potential predators. This variation in defense effectiveness may result from many interacting factors, including the attack strategy, size, learning ability, and physiology of the predators, as well as the chemical nature of the defensive compounds, type of emission, and amount of effluent released by the prey.

Relación entre los médicos y la industria en Aragón (España) / Relationship between physician and industry in Aragon (Spain)

Objetivo Describir, en Aragón, la relación entre los médicos y la industria, y analizar las características de los médicos que se asocian con la probabilidad de recibir beneficios. Métodos Estudio transversal en el cual médicos aragoneses del sector público y privado rellenaron un cuestionario anónimo en una página web, entre junio y noviembre de 2008. El número de visitas/mes con la industria, muestras, regalos, dietas y pagos se incluyeron como variables dependientes en los modelos de regresión. Las variables año de licenciatura, especialidad, lugar de trabajo, tiempo de atención, artículos leídos/mes y ser tutor de residentes se utilizaron como variables independientes. Resultados Se consideraron válidos 659 cuestionarios completados. En general, el 87% de los que respondieron contestaron que habían recibido algún beneficio en el último año, y un 90,1% (n=593) respondieron que habían tenido alguna entrevista con representantes de la industria mensualmente. Las especialidades no clínicas recibieron menos regalos (odds ratio [OR]=0,38; intervalo de confianza del 95% [IC95%]: 0,18-0,77), dietas (OR=0,14; IC95%: 0,06-0,35) y pagos (OR=0,30; IC95%: 0,13-0,74) que sus colegas clínicos. La probabilidad de recibir dietas (OR=0,37; IC95%: 0,15-0,89) y pagos (OR=0,39; IC95%: 0,20-0,77) fue menos probable para los médicos de atención primaria. Conclusiones Este estudio muestra diferencias en la intensidad de la relación médico-industria en función de la especialidad y el lugar de trabajo del médico. Esta información se considera importante para mejorar la transparencia y para desarrollar investigaciones futuras sobre la adecuación y la eficiencia de la prescripción en nuestro país y en otros con sistemas sanitarios similares(AU)

Objective To describe the relationship between industry and physicians and to analyze the physician characteristics associated with the probability of receiving benefits from industry in Aragon (Spain).Methods We carried out an observational, cross-sectional study in which Aragonese physicians (north-east region in Spain) from public and private settings completed an anonymous questionnaire on a web page between June and November 2008. Visits/month with industry, samples, gifts, reimbursements and payments were used as dependant variables in the regression analyses. Year of medical license, specialty, work setting, time spent on direct care, articles read/month and being a resident's tutor were used as independent variables. Results A total of 659 questionnaires were considered valid for the analysis. Overall, 87% (n=573) of the respondents reported they had received some benefit in the previous year and 90.1% (n=593) reported having held meetings with industry representatives monthly. Non-clinical specialists received fewer gifts (odds ratio [OR]=0.38; 95% confidence interval [95%CI]: 0.18-0.77), reimbursements (OR=0.14; 95%CI: 0.06-0.35) and payments (OR=0.30; 95%CI: 0.13-0.74) than their clinical colleagues. The probability of receiving reimbursements (OR=0.37; 95%CI: 0.15-0.89) and payments (OR=0.39; 95%CI: 0.20-0.77) was lower in primary care physicians. Conclusions This study, performed in a sample of physicians from a southern European region, demonstrates differences in the intensity of the physician-industry relationship depending on physician specialty and work setting. These results provide important information for improving transparency and for future research on the appropriateness and efficiency of prescription in Spain and other countries with similar health systems(AU)