Estimation of lung vital capacity before and after coronary artery bypass grafting surgery: a comparison of incentive spirometer and ventilometry

<p>Abstract</p> <p>Background</p> <p>Measurement of vital capacity (VC) by spirometry is the most widely used technique for lung function evaluation, however, this form of assessment is costly and further investigation of other reliable methods at lower cost is necessary. Objective: To analyze the correlation between direct vital capacity measured with ventilometer and with incentive inspirometer in patients in pre and post cardiac surgery.</p> <p>Methodology</p> <p>Cross-sectional comparative study with patients undergoing cardiac surgery. Respiratory parameters were evaluated through the measurement of VC performed by ventilometer and inspirometer. To analyze data normality the Kolmogorov-Smirnov test was applied, for correlation the Pearson correlation coefficient was used and for comparison of variables in pre and post operative period Student's t test was adopted. We established a level of ignificance of 5%. Data was presented as an average, standard deviation and relative frequency when needed. The significance level was set at 5%.</p> <p>Results</p> <p>We studied 52 patients undergoing cardiac surgery, 20 patients in preoperative with VC-ventilometer: 32.95 ± 11.4 ml/kg and VC-inspirometer: 28.9 ± 11 ml/Kg, r = 0.7 p < 0.001. In the post operatory, 32 patients were evaluated with VC-ventilometer: 28.27 ± 12.48 ml/kg and VC-inspirometer: 26.98 ± 11 ml/Kg, r = 0.95 p < 0.001. Presenting a very high correlation between the evaluation forms studied.</p> <p>Conclusion</p> <p>There was a high correlation between DVC measures with ventilometer and incentive spirometer in pre and post CABG surgery. Despite this, arises the necessity of further studies to evaluate the repercussion of this method in lowering costs at hospitals.</p

Electrocardiographic findings in Mexican chagasic subjects living in high and low endemic regions of Trypanosoma cruzi infection

In México the first human chronic chagasic case was recognized in 1940. In spite of an increasing number of cases detected since that time, Chagas disease in México has been poorly documented. In the present work we studied 617 volunteers subjects living in high and low endemic regions of Trypanosoma cruzi infection with seroprevalence of 22% and 4% respectively. Hemoculture performed in those seropositive subjects failed to demonstrate circulating parasites, however polymerase chain reaction identified up to 60% of them as positives. A higher level of anti-T. cruzi antibodies was observed in seropositive residents in high endemic region, in spite of similar parasite persistence (p < 0.05). On standard 12 leads electrocardiogram (ECG) 20% to 22% seropositive individuals from either region showed right bundle branch block or ventricular extrasystoles which were more prevalent in seropositive than in seronegative individuals (p < 0.05). In conclusion, the frequency or type of ECG abnormality was influenced by serologic status but not by endemicity or parasite persistence. Furthermore, Mexican indeterminate patients have a similar ECG pattern to those reported in South America

O papel da informação como medida preventiva ao uso de drogas entre jovens em situação de risco The role of information as a preventive drug measure among youth at risk

Entre os jovens, o uso de drogas ilícitas é um problema de saúde coletiva que desperta atenção. Poucos estudos sobre motivos para o não uso de drogas exploram o real papel da informação como método preventivo. O objetivo do estudo é analisar, entre adolescentes e jovens em situação de risco, os motivos para o não uso de drogas ilícitas, destacando o impacto da informação como fator protetor. Através de metodologia qualitativa, adotou-se uma amostra intencional, selecionada por informantes-chave e por "bola de neve". Foram entrevistados 62 adolescentes e jovens entre dezesseis e 24 anos, de baixa classe socioeconomica. Destes, 32 eram não usuários de drogas (NU) e trinta eram usuários pesados (U). Entre o grupo NU, a informação destacou-se como principal motivo de não uso, através do conhecimento de aspectos positivos e negativos. O principal meio de veiculação foi a família, seguido da observação da experiência negativa vivenciada por amigos que já faziam abuso. Em contrapartida, no grupo U, prevaleceu a falta de informação ou a disponibilidade de conhecimentos vagos. Dispor de informações adequadas sobre o tema "drogas" parece essencial à prevenção do uso experimental entre adolescentes e jovens em situação de risco. No entanto, a informação que mais parece eficaz é a transmitida pela família.<br>Illicit drug consumption among youngsters is a public health concern that requires attention. However, little research has highlighted the importance of "drug information availability" among protection factors. The objective of the study is to identify, from the point of view of youngsters at risk, what factors could prevent them to try illicit drugs, focusing on the importance of "drug information availability". An intentional sample was selected, composed by 62 youngsters divided into two groups: (NU) non illicit users N=32 and (U) users N=30. The sample was recruited through key-informants and snowball and each participant was submitted to an in-depth semi-structured interview. According to NU, "drug information availability" was reported as the main protector factor. Family-based information was the main source of knowledge followed by observation of the drug negative consequences on lives of friends who have already consumed illicit drugs in a regular-basis. Among users, a lack of drug knowledge or availability of partial information was reported. Among youngsters at risk, drug information availability is the main protection factor against experimental and regular drug consumption. Family based information was reported as its main source

Tales of the unexpected: Discussing improvisational learning

© 2014, © The Author(s) 2014. Improvisation has been treated largely as if it were a conceptual monolith: all improvisations are similar. We challenge this theorizing by distinguishing forms of improvisation in organizations (semi-structured, episodic, subversive, resistive) and by exploring ways in which these forms interrelate in improvisational sequences. Improvisation is not just something individuals do; it is a learned capacity that organizations can manage. We introduce the dimension of improvisational formality and informality, adding a political dimension to the study of the topic. By combining forms in process sequences, we organize the existing literature under a systematic perspective facilitating theory development via an integrative understanding of how improvisation produces learning

Influence diagnostics in the tobit censored response model

Cook distance, Likelihood methods, Local influence, Residual analysis,