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Fig. 3 | Critical Care

Fig. 3

From: Ultrasound shear wave elastography for assessing diaphragm function in mechanically ventilated patients: a breath-by-breath analysis

Fig. 3

Diaphragm shear modulus and transdiaphragmatic pressure across different breathing conditions. PTPdi, pressure–time product of transdiaphragmatic pressure (Panel a); ΔPdi, inspiratory change in transdiaphragmatic pressure (Panel b); ΔSMdi, inspiratory change in diaphragm shear modulus assessed using ultrasound shear wave elastography (Panel c). The error bars correspond to 25th and 75th percentile. PS, pressure support ventilation with baseline inspiratory support and positive end-expiratory pressure; PS+25%, PS with inspiratory pressure support increased by 25%; PS-25%, PS with inspiratory pressure support decreased by 25%; PSZEEP, PS with baseline inspiratory support and positive end-expiratory pressure set at 0; SBT, spontaneous breathing trial; SBT Start, start of the SBT; SBT End, end of the SBT. a Significantly different from PS+25%; b Significantly different from PS; c significantly different from PS−25%; d Significantly different from PSZEEP (all p < 0.05)

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Critical Care

ISSN: 1364-8535