Galvanic Skin Response (GSR)
Pulsewave BP and Volume Plethysmography
– In the case of clinical suspicion based on symptoms and clinical findings, the ABI should be used as the first-line noninvasive test for the diagnosis of PAD.
Plethysmography (PTG) is a simple optical technique that can be used to detect blood volume changes in the microvascular bed of tissue. Although the origins of the components of the PTG signal are not fully understood, it is generally accepted that they can provide valuable information about the cardiovascular system.
There has been a resurgence of interest in the technique in recent years, driven by the demand for simple and portable technology for the primary care and community based on clinical settings.