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Table 3 Neuromechanical conversion factors and biases of sEMG-derived effort metrics against \({\mathrm{PTP}}_{\mathrm{mus}}\), \(n=41\)

From: Surface EMG-based quantification of inspiratory effort: a quantitative comparison with Pes

 

\({\mathrm{ETP}}_{\mathrm{di}}\)

\({\mathrm{ETP}}_{\mathrm{interc}}\)

\({\mathrm{ETP}}_{\mathrm{sel}}\)

\(\textit{K}_{\mathrm{EMG}}\) (\(\hbox {cm}\hbox {H}_{2}\hbox {O}/\upmu \hbox {V}\))

4.48 ± 3.89

4.71 ± 4.07

4.32 ± 3.73

\(\textit{P}_{\mathrm{bias}}\) (\({\hbox {cm}\hbox {H}_{2}\hbox {O}}\))

1.38 ± 1.63

1.16 ± 2.16

0.69 ± 1.43

  1. Both parameters (\(\textit{K}_{\mathrm{EMG}}\) and \(\textit{P}_{\mathrm{bias}}\)) were determined by fitting the different ETP metrics to \({\mathrm{PTP}}_{\mathrm{mus}}\) via the linear regression model in Eq. (1). The parameter \(\textit{P}_{\mathrm{bias}}\) represents systemic offsets of the EMG signal against \({\mathrm{P}}_{\mathrm{mus}}\)
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Critical Care

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