Preoperative physical activity has a protective effect against postoperative pulmonary complications after abdominal surgery / Atividade física pré-operatória tem efeito protetor contra complicações pulmonares após cirurgia abdominal

Physical activity level and fitness condition seem to be related with pulmonary surgical risk in thoracic and cardiac surgeries; however, in abdominal surgery this relation is not clear. Objective: To compare the physical activity level in daily life and during hospitalization before surgery between patients who developed and did not develop postoperative pulmonary complications (PPC) after abdominal surgery and to relate to this outcome. Methods: This prospective cohort enrolled 191 hospitalized candidates (52 ± 14yrs; BMI = 29 ± 11 kg/m2) for upper abdominal surgery. Two different tools related to two distinct moments were used to assess preoperatively the physical activity level. First, to assess life physical activity level, the questionnaire Human Activity Profile (HAP) was administered for all patients. During hospitalization, the accelerometry was performed during 4 consecutive days to assess the time in activity. In addition, lung function, muscle strength and resting energy expenditure were assessed. PPC (pneumonia, atelectasis or severe hypoxemia) were checked until discharge. Multivariate analyses were used. Results: 92% of patients were classified as moderately to physically active in daily life. During hospitalization, patients were inactive during 90% ± 5% of time. There was no association with HAP score and acelerometry. 10.5% of patients developed PPC. Being physically active in daily life and during hospitalization have a protective effect against PPC. Our results show that the physical activity behavior in hospital do not reflect the daily life even in patients not restricted to bed and on preoperative period, patients physically actives on daily life and during hospitalization present less chance to develop PPC after abdominal surgery. (AU)

O nível de atividade física e o condicionamento físico parecem estar relacionados ao risco cirúrgico pulmonar em cirurgias torácicas e cardíacas; no entanto, na cirurgia abdominal, essa relação não é clara. Objetivo: Comparar o nível de atividade física na vida diária e durante a hospitalização antes da cirurgia entre pacientes que desenvolveram e que não desenvolveram complicações pulmonares pós-operatórias (CPP) após cirurgia abdominal e relacionar esses desfechos. Métodos: Esta coorte prospectiva recrutou 191 pacientes hospitalizados não restritos ao leito e candidatos a cirurgia abdominal (52 ± 14 anos; IMC = 29 ± 11 kg/m2 ; VEF1 = 98 ± 19% do predito; CVF = 96 ± 16% do predito). Duas ferramentas diferentes relacionadas a dois momentos distintos foram utilizadas para avaliar o nível no pré-operatório de atividade física. Primeiro, para avaliar o nível de atividade física da vida diária, o questionário Perfil de Atividade Humana (PAH) foi aplicado a todos os pacientes. O PAH possui 94 perguntas sobre a execução de atividades gradualmente mais intensas. O PAH classifica o paciente como inativo (<54 pontos), moderadamente ativo (54 a 73 pontos) e ativo (>73 pontos). Segundo, a acelerometria foi realizada durante 4 dias consecutivos para avaliar o tempo de atividade durante a hospitalização. As CPP (pneumonia, atelectasia ou hipoxemia grave) foram verificadas até a alta. Análises multivariadas foram utilizadas. Resultados: 92% dos pacientes foram classificados como moderados a fisicamente ativos na vida diária. Durante a hospitalização, os pacientes ficaram inativos em 90% ± 5% do tempo. Não houve associação com escore do PAH e acelerometria. Cerca de 10,5% dos pacientes desenvolveram CPP. Ser fisicamente ativo na vida diária e durante a hospitalização tem um efeito protetor contra CPP (Odds ratio [OR] = 0,69, IC 95% 0,01- 0,93; OR=0,61, IC 95% 0,12-0,87, respectivamente). Nossos resultados mostram que o comportamento da atividade física no hospital não reflete o da vida diária, mesmo em pacientes não restritos ao leito e no período pré-operatório, e os pacientes ativos fisicamente na vida diária e durante a internação apresentam menor chance de desenvolver CPP após cirurgia abdominal. (AU)

Effect of incentive spirometry after cardiac surgery: protocol for a systematic review / Efeito da espirometria de incentivo no pós-operatório de cirurgia cardíaca: protocolo para uma revisão sistemática

Introduction: Patients receiving cardiac surgeries present high risk of developing postoperative complications. Incentive spirometry (IS) is used for the prevention and treatment of postoperative pulmonary complications in patients undergoing cardiac surgeries. Publications have suggested that IS is ineffective. In contrast, some studies have shown that when IS is adequately used, it may lead to beneficial outcomes. Objectives: To assess the effect of IS in patients undergoing cardiac surgeries. Methods/design: Systematic Reviews with randomised and quasi-randomised trials with adult patients undergoing cardiac surgeries, evaluating the effect of flow or volumeoriented IS. Outcome measures: postoperative pulmonary complications; adverse events; mortality; length of hospital stay; length of intensive care unit stay; reintubation rate; pulmonary function; antibiotic use; oxygenation; and respiratory muscle strength. Search: MEDLINE, EMBASE, CENTRAL, PEDro, CINAHL, LILACS, SCIELO, Allied, AMED, Scopus, Open Grey database, the World Health Organization International Clinical Trials Registry Platform (WHO ICTRP), ClinicalTrials.gov, clinicaltrialsregister.eu, and ReBec. Two authors will independently extract data. PEDro scale will be used to evaluate the methodological quality of the studies. Metaanalysis will be performed using the inverse variance method and the random effects model in RevMan 5.3. We will use the I 2 statistic to estimate the amount of heterogeneity across studies in each meta-analysis. Ethics and dissemination: The approval of an ethical committee is not required. Only clinical trials that have complied with ethical guidelines and followed the Declaration of Helsinki, will be included in this systematic review. The findings of this study will help clarify uncertainties about the effects of incentive spirometry in the postoperative period of cardiac surgery and may be disseminated to clinicians, assisting in decision making and including the best evidence in the treatment of their patients. Discussion: This review will clarify the uncertainty over whether IS is a useful technique for patients undergoing cardiac surgeries. While good quality studies have shown IS is an effective prophylactic technique, other studies have suggested that there is no evidence to support IS utilization. (AU)

Introdução: Pacientes submetidos a cirurgias cardíacas apresentam alto risco de desenvolver complicações pós-operatórias. A espirometria de incentivo (EI) é utilizada para a prevenção e tratamento de complicações pulmonares pós-operatórias em pacientes submetidos a cirurgias cardíacas. As publicações têm sugerido que a EI é inefetiva. Em contrapartida, alguns estudos têm demonstrado que quando a EI é utilizada adequadamente, pode levar a resultados benéficos. Objetivos: Avaliar o efeito da EI em pacientes submetidos a cirurgias cardíacas. Métodos/desenho: Revisões sistemática de estudos randomizados e quase randomizados com pacientes adultos submetidos a cirurgias cardíacas, avaliando o efeito da EI a fluxo ou a volume. Medidas de desfecho: complicações pulmonares pós-operatórias; eventos adversos; mortalidade; tempo de internação hospitalar; tempo de internação na unidade de terapia intensiva; taxa de reintubação; função pulmonar; uso de antibióticos; oxigenação e força muscular respiratória. Busca: MEDLINE, EMBASE, CENTRAL, PEDro, CINAHL, LILACS, SCIELO, Allied, AMED, Scopus, Open Grey database, World Health Organization International Clinical Trials Registry Platform (WHO ICTRP), ClinicalTrials.gov, clinicaltrialsregister.eu, e ReBec. Dois autores irão extrair dados de forma independente. A escala PEDro será utilizada para avaliar a qualidade metodológica dos estudos. A meta-análise será realizada utilizando o método do inverso da variância e o modelo de efeitos aleatórios no RevMan 5.3. Será utilizada a estatística I 2 para estimar a heterogeneidade entre os estudos em cada meta-análise. Ética e disseminação: A aprovação de um comitê de ética não é necessária. Somente estudos clínicos que tenham cumprido as diretrizes éticas e seguido a Declaração de Helsinque serão incluídos nesta revisão sistemática. Os resultados deste estudo ajudarão a esclarecer incertezas sobre os efeitos da espirometria de incentivo no período pós-operatório de cirurgia cardíaca e poderão ser divulgados aos clínicos, auxiliando na tomada de decisões e incluindo as melhores evidências no tratamento de seus pacientes. Discussão: Esta revisão esclarecerá a incerteza sobre a utilidade da EI para pacientes submetidos à cirurgia cardíaca. Embora estudos de boa qualidade tenham demonstrado que a EI é uma técnica profilática eficaz, outros estudos sugeriram que não há evidências que apoiem a utilização da EI. (AU)

Adding positive airway pressure to mobilisation and respiratory techniques hastens pleural drainage: a randomised trial.

QUESTIONS: In patients with a collection of fluid in the pleural space, do mobilisation and respiratory techniques: shorten the drainage period and length of hospital stay; improve respiratory function and oxygenation; and prevent pulmonary complications? Does the addition of positive airway pressure to this regimen further improve the effects? DESIGN: Randomised controlled trial with three intervention arms, concealed allocation, intention-to-treat analysis and blinded assessment. PARTICIPANTS: One hundred and fifty-six inpatients with a fluid collection in the pleural space and with chest drainage in situ. INTERVENTION: Participants received usual care and were randomly assigned to: a control group that also received sham positive airway pressure (4 cmH2O) only (Con); an experimental group that received incentive spirometry, airway clearance, mobilisation and the same sham positive pressure (Exp1); or an experimental group that received the Exp1 regimen except that the positive airway pressure was 15 cmH2O (Exp2). Treatments were provided three times per day for 7 days. OUTCOME MEASURES: Days of chest tube drainage, length of hospital stay, pulmonary complications and adverse events were recorded until hospital discharge. Costs in each group were estimated. RESULTS: The Exp2 group had shorter duration of chest tube drainage and length of hospital stay compared with the Exp1 and Con groups. In addition, the Exp2 group had less antibiotic use (18% versus 43% versus 55%) and pneumonia incidence (0% versus 16% versus 20%) compared with the Exp1 and Con groups (all p < 0.01). The groups had similar rates of adverse events (10% versus 2% versus 6%, p > 0.05). Total treatment costs were lower in the Exp2 group than in the Exp1 and Con groups. CONCLUSIONS: In patients with a fluid collection in the pleural space, the addition of positive pressure to mobilisation and respiratory techniques decreased the duration of thoracic drainage, length of hospital stay, pulmonary complications, antibiotic use and treatment costs. REGISTRATION: ClinicalTrials.govNCT02246946.

Comparing high and low levels of continuous positive airway pressure on lung aeration in patients with pleural drainage: A feasibility study for a randomized controlled trial.

OBJECTIVE: We explored the feasibility of use of continuous positive airway pressure (CPAP) with 15- and 4-cmH2 O for a randomized controlled trial with patients with pleural drainage. METHODS: Ten patients with traumatic pleural effusion drained within 24 hr, with controlled pain received randomly CPAP with 0-, 4-, and 15-cmH2 O. Computed tomography was used to assess the lung aeration. Patients reported the level of tolerability. Air leak was also observed as a parameter of safety. The levels of pressure were compared using the Friedman test followed by the Tukey test as post hoc. RESULTS: The lung area under CPAP with 15 cmH2 O (median = 3,913 mm2 ; IQR = 3,416-4,390 mm2 ) was greater than 4 (median = 3,495 mm2 ; IQR = 3,075-3,954 mm2 ) and 0 cmH2 O (median = 3,382 mm2 ; IQR = 2,962-3,658 mm2 ; p < 0.001). There was no difference between lung areas under CPAP with 4 and 0 cmH2 O. All levels of pressure were well tolerated by patients. No air leak was observed during the assessments. CONCLUSION: CPAP with 15 cmH2 O is able to expand lungs of patients with pleural drainage. CPAP with 4 cmH2 O seems not have therapeutic effect. In addition, CPAP with 15 cmH2 O is well tolerated and safe in this population.

The effect of non-invasive positive airway pressure therapy following thoracic surgical procedures: protocol for a systematic review.

BACKGROUND: Thoracic surgical procedures impair respiratory function, decreasing ventilation and oxygenation and increasing the risk of acute respiratory failure and pulmonary complications. To prevent these clinical repercussions, positive airway pressure therapy is widely used to increase pulmonary ventilation, decrease muscle overload, and ensure adequate oxygenation; however, the benefit of this therapy remains unclear. METHODS/DESIGN: A systematic search of the literature including PubMed, CINAHL, AMED, PsycINFO, LILACS, Scielo, Scopus, PEDro, and the Cochrane Library will identify the randomized and quasi-randomized trials that used CPAP, Bilevel, or IPPB compared with a control without intervention, a sham treatment or other lung expansion techniques following thoracic surgical procedures. From these trials, we will extract data on a predefined list of outcomes, including oxygenation, ventilation, respiratory failure, pulmonary complications, and time of resolution of the clinical condition. The methodological quality of each trial included will be assessed using the PEDro scale. The strength of the recommendations will be summarized using the GRADE scale. Meta-analyses will be performed, if appropriate. DISCUSSION: This review aims to promote greater knowledge regarding the efficiency of the use of non-invasive positive airway pressure on recovery of respiratory function and on prevention of pulmonary complications following thoracic surgical procedures. This review could help health professionals improve the care for patients undergoing thoracic surgical procedures. SYSTEMATIC REVIEW REGISTRATION: PROSPERO CRD42015019004.