Abstract: A wearable sensor assembly for contacting skin, the sensor assembly comprises a hollow, flexibly deformable protrusion, a sensor module, and a sensor device fixating structure. The protrusion is preferably a cushion- or a balloon-shaped protrusion. The protrusion comprises a base and an apex, preferably a substantially flat apex. At least part of the apex forms a contact area for contacting the skin. The sensor module is mounted on or inside the protrusion, preferably on or against the contact area. The sensor device fixating structure is configured to press the contact area with a substantially constant pressure against the skin. When the contact area is pressed against the skin, an increase, respectively decrease of a force exerted on the sensor device deforms, e.g. deflects and/or compresses, the protrusion such that the contact area that is in contact with the skin increases, respectively decreases, while the pressure stays substantially the same.

Abstract: A method of determining one or more vital sign parameters by a wireless vital-sign measurement device comprises: measuring motion information of a user wearing the wireless measurement device, the measurement device being in the idle mode in which at least one opto-electronic sensor in the measurement device is deactivated; switching the measurement device in an active mode if the motion information is below a predetermined threshold, wherein in the active mode the at least one opto-electronic sensor is activated; during a predetermined measuring period, exposing part of a skin tissue of the user to light and measuring one or more optical response signals associated with the exposed skin tissue and the motion sensor measuring motion information associated with movements of the user; and, selecting or rejecting one or more pulses in the one or more optical response signals on the basis of the motion information measured during the measuring period and determining one or more vital sign parameters on the basis

Abstract: A method of determining one or more vital sign parameters by a wireless vital-sign measurement device comprises: measuring motion information of a user wearing the wireless measurement device, the measurement device being in the idle mode in which at least one opto-electronic sensor in the measurement device is deactivated; switching the measurement device in an active mode if the motion information is below a predetermined threshold, wherein in the active mode the at least one opto-electronic sensor is activated; during a predetermined measuring period, exposing part of a skin tissue of the user to light and measuring one or more optical response signals associated with the exposed skin tissue and the motion sensor measuring motion information associated with movements of the user; and, selecting or rejecting one or more pulses in the one or more optical response signals on the basis of the motion information measured during the measuring period and determining one or more vital sign parameters on the basis