12 research outputs found
Alterações ventilatĂłrias durante o uso de trocadores de calor e umidade em pacientes submetidos Ă ventilação mecânica com pressĂŁo de suporte e ajustes nos parâmetros ventilatĂłrios para compensar estas possĂveis alterações: estudo de intervenção autocontrolado em humanos
RESUMO Objetivo: Avaliar as possĂveis alterações do volume corrente, volume-minuto e frequĂŞncia respiratĂłria causadas pela utilização de trocadores de calor e umidade em pacientes submetidos Ă ventilação mecânica na modalidade pressĂŁo de suporte, e quantificar a variação da pressĂŁo de suporte necessária para compensar o efeito causado pelo trocador de calor e umidade. MĂ©todos: Os pacientes sob ventilação mecânica invasiva na modalidade pressĂŁo de suporte foram avaliados utilizando umidificadores aquecidos e trocadores de calor e umidade. Caso o volume encontrado com uso de trocadores de calor e umidade fosse menor que o achado com o umidificador aquecido, iniciava-se o aumento da pressĂŁo de suporte, perante o uso de trocadores de calor e umidade, atĂ© ser encontrado um valor de pressĂŁo de suporte que possibilitasse ao paciente gerar um valor prĂłximo do volume corrente inicial com umidificador aquecido. A análise foi realizada por meio do teste t pareado, e os valores de incremento foram expressos em porcentagem de aumento necessário. Resultados: Foram avaliados 26 pacientes. O uso de trocadores de calor e umidade aumentou a frequĂŞncia respiratĂłria, e reduziu o volume corrente e o volume-minuto, quando comparados com o uso do umidificador aquecido. Com o uso de trocadores de calor e umidade, os pacientes precisaram de um incremento de 38,13% na pressĂŁo de suporte para manter os volumes prĂ©vios. ConclusĂŁo: O trocador de calor e umidade alterou os parâmetros de volume corrente, volume-minuto e frequĂŞncia respiratĂłria, sendo necessário um aumento da pressĂŁo de suporte para compensar estas alterações
Monitoring.
<p>A) Optoelectronic plethysmography (OEP): retro-reflective markers separating both the upper rib cage (RCp) and abdomen (AB) compartments. B) Respiratory Inductive plethysmography (RIP): elastic bands positioned on RCp and AB compartments. C) RCp and AB movement during respiratory cicles.</p
Thoracoabdominal asynchrony: Two methods in healthy, COPD, and interstitial lung disease patients
<div><p>Background</p><p>Thoracoabdominal asynchrony is the nonparallel motion of the ribcage and abdomen. It is estimated by using respiratory inductive plethysmography and, recently, using optoelectronic plethysmography; however the agreement of measurements between these 2 techniques is unknown. Therefore, the present study compared respiratory inductive plethysmography with optoelectronic plethysmography for measuring thoracoabdominal asynchrony to see if the measurements were similar or different.</p><p>Methods</p><p>27 individuals (9 healthy subjects, 9 patients with interstitial lung disease, and 9 with chronic obstructive pulmonary disease performed 2 cycle ergometer tests with respiratory inductive plethysmography or optoelectronic plethysmography in a random order. Thoracoabdominal asynchrony was evaluated at rest, and at 50% and 75% of maximal workload between the superior ribcage and abdomen using a phase angle.</p><p>Results</p><p>Thoracoabdominal asynchrony values were very similar in both approaches not only at rest but also with exercise, with no statistical difference. There was a good correlation between the methods and the Phase angle values were within the limits of agreement in the Bland-Altman analysis.</p><p>Conclusion</p><p>Thoracoabdominal asynchrony measured by optoelectronic plethysmography and respiratory inductive plethysmography results in similar values and has a satisfactory agreement at rest and even for different exercise intensities in these groups.</p></div
Demographic and pulmonary function characteristics of healthy, ILD, and COPD groups.
<p>Demographic and pulmonary function characteristics of healthy, ILD, and COPD groups.</p
Ventilatory variables of healthy, ILD, and COPD groups at rest, L<sub>50</sub>, and L<sub>75</sub> during OEP and RIP monitoring.
<p>Ventilatory variables of healthy, ILD, and COPD groups at rest, L<sub>50</sub>, and L<sub>75</sub> during OEP and RIP monitoring.</p
Representation of the PhAng calculation.
<p>ΔV<sub>RCp</sub>: upper RC variation; ΔV<sub>AB</sub>: AB abdomen variation, m: 50% of ΔV<sub>RCp</sub>, s: maximal excursion of ΔV<sub>AB</sub>. PhAng: Sin Ɵ = m/s.</p
Regression polynomial model representing the PhAng with OEP and RIP.
<p>PhAng: Phase Angle, OEP: optoelectronic plethysmography, RIP: respiratory inductive plethysmography, ILD: interstitial lung disease, COPD: chronic obstructive pulmonary disease, L50 and L75: 50% and 75% of maximal load.</p
Study protocol.
<p><b>Monitoring in the first and second phases, depending on the randomization.</b> OEP: optoelectronic plethysmography, RIP: respiratory inductive plethysmography, L50 and L75: 50% and 75% of maximal load.</p