Ortega Isabel Cristina Muñoz, Valdivieso Alher Mauricio Hernández, Lopez Joan Francesc Alonso, Villanueva Miguel Ángel Mañanas, Lopez Luis Horacio Atehortúa
Grupo de Pesquisa em Bioinstrumentação e Engenharia Clínica, Departamento de Bioengenharia, Faculdade de Engenharia, Universidad de Antioquia - Medellín, Colômbia.
Departamento de Controle Automático e Centro de Pesquisa em Engenharia Biomédica, Universitat Politécnica de Catalunya - Barcelona, Espanha.
Rev Bras Ter Intensiva. 2017 Apr-Jun;29(2):213-221. doi: 10.5935/0103-507X.20170030.
The aim of this pilot study was to evaluate the feasibility of surface electromyographic signal derived indexes for the prediction of weaning outcomes among mechanically ventilated subjects after cardiac surgery.
A sample of 10 postsurgical adult subjects who received cardiovascular surgery that did not meet the criteria for early extubation were included. Surface electromyographic signals from diaphragm and ventilatory variables were recorded during the weaning process, with the moment determined by the medical staff according to their expertise. Several indexes of respiratory muscle expenditure from surface electromyography using linear and non-linear processing techniques were evaluated. Two groups were compared: successfully and unsuccessfully weaned patients.
The obtained indexes allow estimation of the diaphragm activity of each subject, showing a correlation between high expenditure and weaning test failure.
Surface electromyography is becoming a promising procedure for assessing the state of mechanically ventilated patients, even in complex situations such as those that involve a patient after cardiovascular surgery.
本初步研究的目的是评估表面肌电信号衍生指标预测心脏手术后机械通气患者撤机结果的可行性。
纳入10名接受心血管手术但不符合早期拔管标准的成年术后患者。在撤机过程中记录膈肌的表面肌电信号和通气变量，撤机时刻由医务人员根据其专业知识确定。使用线性和非线性处理技术评估了来自表面肌电图的几个呼吸肌消耗指标。比较了两组：成功撤机和未成功撤机的患者。
所获得的指标能够估计每个受试者的膈肌活动，显示出高消耗与撤机测试失败之间的相关性。
表面肌电图正成为评估机械通气患者状态的一种有前景的方法，即使在诸如心血管手术后患者这样的复杂情况下也是如此。
