Figure 1 | Scientific Reports

Figure 1

From: Prediction of blood pressure change during surgical incision under opioid analgesia using sympathetic response evoking threshold

Figure 1

Schematic diagram of the mechanical impedance model. The model used in this study consists of a parallel arrangement of springs and dampers across the diameter of the arterial wall. When a force (blood pressure) is applied across the diameter of the artery, the arterial wall is dampened by springs and dampers that represent the rigidity and viscosity of the arterial wall itself. The behavior of the arterial wall after damping is observed as a change in the photoplethysmogram waveform.

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