Evolución de los indicadores bibliométricos de producción y repercusión de la revista Neumosur (2002-2006) / Evolution of the bibliometric indicators of production and impact of the Neumosur journal (2002-2006)

Objetivos. Evaluar la producción científica que la revista Neumosurha tenido entre los años 2002-2006 mediante un estudiobibliométrico de producción y repercusión.Métodos. Se recogieron todas las publicaciones de la revistaNeumosur entre los años 2002-2006 y se introdujeron en una basede datos, con lo que se realizó un estudio descriptivo. En unsegundo tiempo, se calcularon diversos indicadores bibliométricosde producción y repercusión para cada año de la revista como son:índice de Lotka, índice de cooperación, tasa de referencias, visibilidad,influencia, semiperiodo de las citas y el factor de impacto.Resultados. Durante el periodo de estudio, la revista Neumosurha publicado 102 artículos: 14 (13,7%) editoriales, 44 (43,1%)originales, 22 (21,6%) artículos de revisión, 15 (14,7%) notas clínicasy 7 (6,9%) cartas al director. De ellos, 81 (79,4%) eran artículoscitables. La cooperación disminuyó progresivamente hasta 3,04para el año 2006 con una producción similar a periodos previos asícomo el número de originales. La revista Neumosur ha recibido untotal de 5 citas internacionales y 26 citas de la revista Neumosur. Elfactor de impacto máximo alcanzado por la revista fue de 0,069 enel año 2004 que ascendió a 0,207 para ese mismo año teniendo encuenta las citas de la propia revista Neumosur.Conclusiones. La evolución de los indicadores de producción yrepercusión de la revista Neumosur reflejan una meseta para lamayoría de los indicadores con respecto al periodo anterior estudiado (AU)

Objectives. To evaluate the scientific production that the Neumosurjournal has had between the years 2002-2006 by means of a bibliometricstudy of production and impact.Methods. All the editions of the Neumosur journal between theyears 2002-2006 were included and were introduced into a data base,with which a descriptive study was made. Later, several bibliometricindicators of production and impact for every year of the journalwere calculated: Lotka’s index, cooperation index, reference rate, visibility,influence, half period of the citations and the impact factor.Results. During the period of study, the Neumosur journal haspublished 102 articles: 14 (13.7%) editorials, 44 (43.1%) originals, 22(21.6%) review articles, 15 (14.7%) clinical notes and 7 (6.9%) lettersto the director. Of those, 81 (79.4%) were citable articles. The cooperationdiminished progressively down to 3.04 for the year 2006 with aproduction similar to previous periods as well as the number of originals.The Neumosur journal has received a total of 5 internationalcitations and 26 national citations. The maximum impact factorreached by the journal was 0.069 in 2004 that rose to 0.207 for thesame year when considering citations of the Neumosur journal itself.Conclusions. The evolution of the production and impact indicatorsof the Neumosur journal reflect a plateau for most of the indicatorswith respect to the previously studied period (AU)

Evolución de los indicadores bibliométricos de producción y repercusión de la revista Neumosur (2002-2006) / Evolution of the bibliometric indicators of production and impact of the neumosur journal (2002-2006)

Objetivos. Evaluar la producción científica que la revista Neumosur ha tenido entre los años 2002-2006 mediante un estudio bibliométrico de producción y repercusión. Métodos. Se recogieron todas las publicaciones de la revista Neumosur entre los años 2002-2006 y se introdujeron en una base de datos, con lo que se realizó un estudio descriptivo. En un segundo tiempo, se calcularon diversos indicadores bibliométricos de producción y repercusión para cada año de la revista como son: índice de Lotka, índice de cooperación, tasa de referencias, visibilidad, influencia, semiperiodo de las citas y el factor de impacto. Resultados. Durante el periodo de estudio, la revista Neumosur ha publicado 102 artículos: 14 (13,7%) editoriales, 44 (43,1%) originales, 22 (21,6%) artículos de revisión, 15 (14,7%) notas clínicas y 7 (6,9%) cartas al director. De ellos, 81 (79,4%) eran artículos citables. La cooperación disminuyó progresivamente hasta 3,04 para el año 2006 con una producción similar a periodos previos así como el número de originales. La revista Neumosur ha recibido un total de 5 citas internacionales y 26 citas de la revista Neumosur. El factor de impacto máximo alcanzado por la revista fue de 0,069 en el año 2004 que ascendió a 0,207 para ese mismo año teniendo en cuenta las citas de la propia revista Neumosur. Conclusiones. La evolución de los indicadores de producción y repercusión de la revista Neumosur reflejan una meseta para la mayoría de los indicadores con respecto al periodo anterior estudiado

Objectives. To evaluate the scientific production that the Neumosur journal has had between the years 2002-2006 by means of a bibliometric study of production and impact. Methods. All the editions of the Neumosur journal between the years 2002-2006 were included and were introduced into a data base, with which a descriptive study was made. Later, several bibliometric indicators of production and impact for every year of the journal were calculated: Lotka’s index, cooperation index, reference rate, visibility, influence, half period of the citations and the impact factor. Results. During the period of study, the Neumosur journal has published 102 articles: 14 (13.7%) editorials, 44 (43.1%) originals, 22 (21.6%) review articles, 15 (14.7%) clinical notes and 7 (6.9%) letters to the director. Of those, 81 (79.4%) were citable articles. The cooperation diminished progressively down to 3.04 for the year 2006 with a production similar to previous periods as well as the number of originals. The Neumosur journal has received a total of 5 international citations and 26 national citations. The maximum impact factor reached by the journal was 0.069 in 2004 that rose to 0.207 for the same year when considering citations of the Neumosur journal itself. Conclusions. The evolution of the production and impact indicators of the Neumosur journal reflect a plateau for most of the indicators with respect to the previously studied period

Valoración de la capacidad laboral e incapacidad/invalidez en las enfermedades respiratorias / No disponible

No disponible

Inspiratory muscle training in patients with COPD: effect on dyspnea, exercise performance, and quality of life.

OBJECTIVE: The aim of the study was to assess the effect of target-flow inspiratory muscle training (IMT) on respiratory muscle function, exercise performance, dyspnea, and health-related quality of life (HRQL) in patients with COPD. PATIENTS AND METHODS: Twenty patients with severe COPD were randomly assigned to a training group (group T) or to a control group (group C) following a double-blind procedure. Patients in group T (n = 10) trained with 60 to 70% maximal sustained inspiratory pressure (SIPmax) as a training load, and those in group C (n = 10) received no training. Group T trained at home for 30 min daily, 6 days a week for 6 months. MEASUREMENTS: The measurements performed included spirometry, SIPmax, inspiratory muscle strength, and exercise capacity, which included maximal oxygen uptake (VO(2)), and minute ventilation (VE). Exercise performance was evaluated by the distance walked in the shuttle walking test (SWT). Changes in dyspnea and HRQL also were measured. RESULTS: Results showed significant increases in SIPmax, maximal inspiratory pressure, and SWT only in group T (p < 0.003, p < 0.003, and p < 0.001, respectively), with significant differences after 6 months between the two groups (p < 0.003, p < 0.003, and p < 0.05, respectively). The levels of VO(2) and VE did not change in either group. The values for transitional dyspnea index and HRQL improved in group T at 6 months in comparison with group C (p < 0.003 and p < 0.003, respectively). CONCLUSIONS: We conclude that targeted IMT relieves dyspnea, increases the capacity to walk, and improves HRQL in COPD patients.

[Role of dyspnea in quality of life of the patient with chronic obstructive pulmonary disease]. / Papel de la disnea en la calidad de vida del paciente con enfermedad pulmonar obstructiva crónica.

OBJECTIVE: To analyze the correlation between quality of life and 1) lung function parameters at rest and during exercise, and 2) mean baseline dyspnea measured on two scales--Mahler's baseline dyspnea index (BDI/TDI) and the Medical Research Council (MRC) scale. We sought to observe the factor or factors having the greatest impact on the quality of life of such patients. MATERIAL AND METHODS: Fifty-five patients diagnosed of COPD in stable phase of disease participated. Al underwent lung function testing at rest and during exercise (shuttle walking test with increasing loads and an exercise cycle test). Quality of life was assessed on the validated Spanish translation of the Chronic Respiratory Disease Questionnaire, which refers specifically to COPD. Baseline dyspnea was measured using Mahler's BDI/TDI and the MRC scale. RESULTS: Mean patient age was 63 +/- 9.5 years and FEV1 was 40 +/- 16.9%. Overall quality of life and each sub-item correlated significantly with mean dyspnea on both scales (BDI/TDI and MRC). Effort was weakly correlated and function parameters at rest were unrelated. Multiple correlation analysis showed that baseline dyspnea (BDI/TDI) was the most important predictor of quality of life. CONCLUSIONS: Dyspnea, particularly when expressed as BDI/TDI but also as measured on the MRC scale, correlates more highly with quality of life than does any other parameter. This indicates that dyspnea has greater impact than other factor on quality of life and that BDI/TDI provides a good baseline assessment of dyspnea in COPD patients.

[Comparative study of the efficacy of 2 respiratory physiotherapy protocols for patients with cystic fibrosis]. / Estudio comparativo de la eficacia de dos protocolos de fisioterapia respiratoria en pacientes con fibrosis quística.

OBJECTIVE: To compare the short-term efficacy of two respiratory physiotherapy protocols on sputum clearance, lung function and symptoms in patients with cystic fibrosis. Treatment A consisted of diaphragm breathing with incentive spirometry and postural drainage. Treatment B consisted of diaphragm breathing with positive expiratory pressure (PEP-mask) and postural drainage. METHODS: Twenty-seven cystic fibrosis patients in stable condition followed both protocols (A and B) in random order on different days separated by at least 48 hours. After each treatment session the amount of sputum removed was weighed. Lung function variables (FVC, FEV1, FEV1%, MMEFwt-75, MVV and PEF) were measured pre- and posttreatment. PEF was measured with a peak flow meter. The patients later recorded PEF every hour at home and filled in a questionnaire on frequency and intensity of coughing, sputum characteristics, chest discomfort and dyspnea. RESULTS: During treatment A with incentive spirometry, 14.6 +/- 13.7 g of sputum was removed, whereas 9.8 +/- 10.2 g was eliminated during treatment B (p < 0.05). The differences in PEF after treatments A and B in comparison with baseline values were +19.3 l/min and -0.2 l/min, respectively (p < 0.01). PEF stayed high during the afternoon, in comparison with baseline, with treatment A (p < 0.02). After treatment B, no changes in PEF in comparison with baseline were observed (p = 0.49). Neither treatment led to significant differences in symptoms reported on the clinical questionnaire. CONCLUSIONS: Respiratory physiotherapy with incentive spirometry significantly increases sputum clearance in cystic fibrosis patients, with no immediate repercussions on lung function or symptoms.

[Reproducibility of a shuttle walking test in patients with chronic obstructive pulmonary disease]. / Reproducibilidad de un test de paseo de carga progresiva (shuttle walking test) en pacientes con enfermedad pulmonar obstructiva crónica.

To analyze the reproducibility of the shuttle walking test (SWT) in comparison to the six min walking test in patients with chronic obstructive pulmonary disease (COPD). The stress tests were performed by 13 patients diagnosed of COPD with moderate-to-severe air flow obstruction (FEV1 45.85 +/- 18.82% of theoretical values). Each patient performed the SWT six times (twice a week over three consecutive weeks). The 6 min walking test was performed an equal number of times. At baseline and at the end of both types of test, heart rate and degree of dyspnea (on a modified version of Borg's scale) were recorded, as well as the level reached and the number of meters walked. No significant differences in distance walked, heart rate or degree of dyspnea were found for the six SWTs performed. The interclass correlation coefficients for the aforementioned parameters were 0.875, 0.879 and 0.896, respectively; the variation coefficient for distance covered ranged between -10.7% and 10.2%. In the six min walking test significant differences were seen between distance walked in the first two tests and the other four tests. The variation co-efficient ranged between 11.4% and 17.5%. The SWT is a reproducible stress test in which the patient must exert progressively greater effort. The low degree of variability observed assures that the level of effort attained is steady and consistent.

[Comparison of a shuttle walking test with an exertion test with cycloergometer in patients with COPD]. / Comparación de un test de paseo de carga progresiva (shuttle walking test) con una prueba de esfuerzo en cicloergómetro en pacientes con EPOC.

To validate a shuttle walking test in a group of patients with COPD, comparing responses to those produced by a conventional stress test limited by symptoms on the cycle ergometer, and to analyze the relation between the shuttle walking test and maximal effort parameters. We enrolled 20 patients with COPD, mean age 60 years (SD 7), FEV1/46.6% (SD 19.2) of theoretical value and FEV1/FVC% 47.3% (SD 11.2). All the patients underwent a maximal effort test on the cycle ergometer, determination of initial dyspnea by applying Mahler's baseline dyspnea index, and a quality of life questionnaire specific to COPD the Chronic Respiratory Disease Questionnaire). To compare the responses of patients to the two tests, we analyzed heart rate, dyspnea and lactic acid at the end of each test. To see the relations between the two tests, we examined distance walked and maximal effort parameters. The relation between the walking test and lung function parameters at rest, initial dyspnea and quality of life were also analyzed. No statistically significant differences were found for heart rate [128.2 (SD 19.8) versus 131.6 (SD 12.9)], dyspnea 17.1 (SD 1.78) versus 7.24 (SD 2.64)] or lactic acid [5.24 (SD 2.34) versus 6.19 (SD 2.12)] at the end of the tests. Distance covered on the shuttle walking test correlated significantly with V'O2ml/min/Kgmax (r = 0.71), as well as with the remaining parameters of maximal effort. There was only a slight relation between lung function at rest and quality of life. The COPD patient's cardiovascular, metabolic and subjective responses to the shuttle walking test are similar to those of the cycle ergometer test, and oxygen consumption is significantly correlated. The shuttle walking test gives a valid estimate of the functional capacity of COPD patients.

[Abdominal respiratory muscle activity in patients with stable chronic obstructive pulmonary disease]. / Actividad de la musculatura espiratoria abdominal en pacientes con enfermedad pulmonar obstructiva crónica estable.

With the purpose of defining the pattern of abdominal respiratory muscle activity in patients with chronic obstructive pulmonary disease (COPD), we studied the electromyogram of the rectus abdominis (RA), the external oblique (EO) and transversus (TM) muscles in 14 patients with different degrees of airways obstruction (FEV1: 41 +/- 12%; FEV1/FVC: 45 +/- 10%; RV: 198 +/- 38%; PaO2: 75.8 +/- 12 y PaCO2: 41.4 +/- 5.7 mmHg). The EMG was obtained by insertion of bipolar electrodes guided by an ultrasound image of the abdominal wall to locate the position of the muscles. The measurements were recorded in supine decubitus position in 5 situations: a) breathing at tidal volume; b) slow expiration until RV; c) with inspiratory load; d) with expiratory load, and e) during relaxed breathing with the arms raised. Recordings were also made in the same situations with 10 patients sitting. Eight patients presented phasic expiratory activity during relaxed breathing (TM activity alone or accompanied by EO). We found no significant differences in degree of hyperinflation or in arterial gases between patients with phasic expiratory activity and those without. There were significant differences between these 2 groups, however, as to degree of airways obstruction, for absolute values of FEV1 (p < 0.02) and in raw values (p < 0.04). Slow breathing until RV recruited muscular activity in 13 patients; the muscles did not operate in unison, however, with TM acting first. Recruitment was also observed when inspiratory and expiratory loads were placed, although in this case the 3 muscles acted simultaneously. Phasic activity was observed in only 2 patients for recordings made with arms raised, at which time there was greater tonic muscle activity. The phasic activity pattern recorded when patients were sitting was very similar to that obtained in supine position. In summary, some patients with stable COPD have phasic expiratory activity of the abdominal muscles when resting. These muscles do not appear to act as a unit and this phasic expiratory activity is related to severity of upper airways obstruction.

[Prediction of maximal ventilation during exercise in patients with chronic obstructive pulmonary disease]. / Predicción de la ventilación máxima alcanzada en el esfuerzo en pacientes con enfermedad pulmonar obstructiva crónica.

To analyze the validity of baseline lung function parameters as predictors of maximal exercise ventilation (VEmax) in patients with chronic obstructive pulmonary disease (COPD), we studied 33 stable patients (FEV1 43.6 +/- 16.8%, FEV1/FVC% 48.4 +/- 9.2, FRC 156.8 +/- 32.7% and RV 212 +/- 53.9%). The sample was later divided into 3 groups based on severity of disease (severe, moderate or mild) in order to determine whether ability to predict VEmax increased with airways obstruction (FEV1 26.9 +/- 4.9%, 40.2 +/- 3.5% and 63.9 +/- 10%, respectively). The patients underwent lung function testing at rest and after a progressive stress test, with the maximal reading taken with the subject on a tread mill. We found greater correlation between VEmax and RV, FEV1 and FRC (r = -0.77, 0.75 and -0.74, respectively); the correlation was stronger in patients with severe COPD, in whom FEV1 was under 35% of the predicted value (r = -0.88, 0.753 and -0.83, respectively). Correlation decreased or disappeared with less functional impairment. Prediction of VEmax was more reliable with equations that employed FEV1 accompanied by data reflecting degree of insufflation, RV or FRC (VEmax = 45.2 +/- 8.98 x FEV1 - 5.07 x RV; r2 = 0.72) than with equations based on FEV1 alone (VEmax = 14.79 + 15.03 x FEV1; r2 = 0.56). We therefore conclude that ventilatory limitation during exercise in patients with COPD is better defined by considering parameters related to lung insufflation along with those reflecting degree of expiratory obstruction, given that the former affect the greater or lesser efficacy of muscles under stress.(ABSTRACT TRUNCATED AT 250 WORDS)